Actinic radiation cured coating composition

FIELD: chemistry.

SUBSTANCE: invention relates to an actinic radiation cured coating composition containing a compound which contains at least two isocyanate groups, a compound which contains at least two hydroxyl groups, a sensitising agent and a photolatent catalyst for an isocyanate-hydroxl coupling reaction, where the photolatent catalyst is an organometallic compound, containing tin as a catalytically active metal, and where the atom of the catalytically active metal in the organometallic compound is not bonded to atoms of other metals. The invention also describes a method of coating a substrate, involving a step for applying said composition onto the substrate, as well as a set of parts for preparing said actinic radiation cured coating composition.

EFFECT: obtaining an actinic radiation cured coating composition having a good balance of long life and fast curing after application and irradiation, and leads to formation of cured coatings, the colour of which is not affected by coloured residues or photolatent catalyst fragments.

13 cl, 6 ex, 4 tbl

 

The invention relates to cured by actinic radiation a composition for coating comprising a compound containing at least two isocyanate groups, a compound containing at least two hydroxyl groups, and fatalaty catalyst reaction-type isocyanate-hydroxyl accession. The invention relates, furthermore, to a method for coating on a substrate and to a kit of parts.

Cured by actinic radiation a composition for coating the above-mentioned type is known from the description of the research work 42616. This document describes the activated fluorescent light catalyst that can be used in compositions for coating for the reaction of isocyanate and hydroxyl groups. This catalyst is a ruthenium complex having the relationship between the ruthenium and tin. By irradiating the fluorescent light is decomposed into ruteniisoderzhashchii fragment and radical SnR3. Due to reaction with other compounds of the existence of these radicals is terminated. After the demise of the radicals formed containing SnR3the compounds have activity as catalysts for the reaction of the isocyanate-hydroxyl accession, whereas before irradiation of the complex does not possess.

A disadvantage of the known curing actinic radiation a composition for coating is that the catalyst has a color. As a result, the coating also has a color. Although the irradiation of rays in the visible spectrum, the color intensity decreases, utverjdenie floor not completely discolored. This limits the usefulness of known composition for coating, in particular for applications where adjustment of color, in particular when it is necessary to re-Polish the car. Activation of the catalyst fluorescent light requires special precautions when handling a catalyst and a composition for coating to prevent premature activation of the catalyst unintentional exposure to fluorescent light. Moreover, to achieve practical speeds curing requires a relatively large amount of catalyst.

Cured by actinic radiation a composition for coating is also known from US 4549945. This document says that the addition of some ORGANOTIN compounds in the mixture of diisocyanate and polyol provides education fotoallergiyami composition, which, when it affects ultraviolet radiation, fast cure. Curing does not occur the result as long while the reaction mixture is not affected by ultraviolet radiation to the extent which is sufficient to effect activation sensitive to UV rays ORGANOTIN compounds. Useful sensitive to UV rays ORGANOTIN compounds have tin-tin bond.

ORGANOTIN compounds, described in this document are determined to be poor solubility in compositions for coating comprising a polyisocyanate and a polyol, causing difficulties for homogeneous distribution in the composition. Moreover, the compositions known from US 4549945 for adequate activation of the catalyst require irradiation more harmful rays, UV-b and/or UV-B region of the spectrum, while less dangerous rays in the UV-a spectral region are not sufficient.

The present invention is the creation of curing actinic radiation a composition for coating, which is free from the above disadvantages of the known compositions. More specifically, such composition should lead to utverzhdennym coatings on color which is painted remnants and/or fragments votolatino catalyst is not affected, allowing, thus, to use the composition for the purpose where you want the color according to the surrounding covered surfaces, in particular when it is necessary to re-Polish the car. The composition should not be prone to activation in relation to curing unintentional exposure to normal daylight before applying. Activation of the catalyst in the composition in a preferred embodiment, it should be possible with the use of less hazardous radiation in the UV-a and UV-B spectral range and should not require hazardous radiation in the UV spectral region. Moreover, fatalaty the catalyst should be sufficiently soluble in the compositions for coating comprising a polyisocyanate and a polyol, which ensures homogeneous distribution votolatino catalyst composition. Composition for coating should also show a good balance of long-term viability and rapid hardening after application and exposure. Such a balance is difficult to achieve with deletetime curing catalysts, in particular in the so-called compositions for coating with high dry matter content, i.e. compositions with a high content of non-volatiles.

The object of the invention is cured by actinic radiation a composition for coating comprising a compound containing at least two isocyanate groups, a compound containing at least two hydroxyl groups, a sensitizer and fatalaty catalyst for reacts and isocyanate-hydroxyl accession, in which fatalaty the catalyst is an organic compound and metal, including latent catalytically active metal, where the atom latent catalytically active metal in the organic compound of the metal is not associated with the atoms of other metals.

This composition leads to the formation of hardened coatings, the color of which does not affect painted remnants and/or fragments votolatino catalyst. Therefore, the composition can be used for applications where adjustment of color, in particular when it is necessary to re-Polish the car. This song is not prone to activation in relation to curing unintentional exposure to normal daylight before applying. Activation of the catalyst composition can be completed in less dangerous rays in the UV-a spectral region, and does not require dangerous rays, UV-b and/or UV-B region of the spectrum. Moreover, fatalaty the catalyst is sufficiently soluble in the composition for coating, which ensures homogeneous distribution votolatino catalyst composition.

Acceptable compounds containing at least two isocyanate groups, is an organic diisocyanate. In the preferred embodiment, this compound is a polyisocyanate, such as aliphatic, C is calificaci or aromatic di-, three or tetrazocine. Examples of diisocyanates include 1,2-propylenediene, trimethylindolenine, tetramethyldisilane, 2,3-butylenediamine, hexamethylenediisocyanate, octamethyltrisiloxane, 2,2,4-trimethylhexamethylenediamine, dodecyltrimethoxysilane, diisocyanate ω, ω'-dipropylamino ether, 1,3-cyclopentadiene, 1,2-cyclohexanedimethanol, 1,4-cyclohexanediethanol, isophorondiisocyanate, 4-methyl-1,3-diisocyanatohexane, TRANS-vinylidenechloride, dicyclohexylmethane-4,4'-diisocyanate (Desmodur®W), colorvision, 1,3-bis-(isocyanatomethyl)benzene, xylylenediisocyanate, α,α,α',α'-tetramethylethylenediamine (TMXDI®), 1,5-dimethyl-2,4-bis-(2-isocyanatomethyl)benzene, 1,3,5-triethyl-2,4-bis-(isocyanatomethyl)benzene, 4,4'-diisocyanatobutane, 3,3'-dichloro-4,4'-diisocyanatobutane, 3,3'-diphenyl-4,4'-diisocyanatobutane, 3,3'-dimethoxy-4,4'-diisocyanatobutane, 4,4'-diisocyanatobutane, 3,3'-dimethyl-4,4'-diisocyanatobutane and disorientation. Examples of triisocyanate include 1,3,5-triisocyanate, 2,4,6-triisocyanate, 1,8-diisocyanato-4-(isocyanatomethyl)octane and disinclination. These include the addition products and oligomers of MDI, such as carbamylation, isocyanurate, allophanate, uretdione, urethanes and mixtures thereof. Examples of such oligomers and products etc the compounds are a product of the joining of 2 molecules of a diisocyanate, for example, hexamethylenediisocyanate or isophorondiisocyanate to dialu, such as ethylene glycol, the product of the joining of 3 molecules of hexamethylenediisocyanate to 1 molecule of water (available under the trade name Desmodur N firms Voeg), product fitting 1 molecule of trimethylolpropane to 3 molecules colordistance (available under the trade name Desmodur L company Voeg), product fitting 1 molecule of trimethylolpropane to 3 molecules of isophorondiisocyanate, the product of the joining of 1 molecule of pentaerythritol to 4 molecules colordistance, product fitting 3 mol m-α,α,α',α'-tetramethyldisilane to 1 pray of trimethylolpropane, which is the trimer of 1,6-diisocyanatohexane, which is the trimer of isophorondiisocyanate, uretdione dimer of 1,6-diisocyanatohexane, carbamylation 1,6-disorientation, allophanate 1,6-diisocyanatohexane and mixtures thereof. You can also use asymmetric trimers of diisocyanates, such as Desmodur XP 2410 company Voeg. Moreover, to apply acceptable (co)polymers monomer with an isocyanate functional group, such as α,α'-dimethyl-m-isopropylbenzenesulfonyl. Acceptable also oligomers and polymers with isocyanate end group. Such oligomers or polymers can be obtained by reaction of the precursor with an active hydrogen functional group with axiometrics an excess of diisocyanate. Acceptable active hydrogen functional groups are hydroxyl groups, thiol groups, and primary and secondary amino groups. You can also use donor group Michael, such as malonate and acetoacetate. Predecessor with an active hydrogen functional group may be a monomer, oligomer or polymer.

Examples of acceptable oligomers or polymers with hydroxyl functional group as precursors are polyesters with a hydroxyl functional group, a polyacrylate with a hydroxyl functional group, the polycarbonates with hydroxyl functional group, and mixtures or hydrides.

You can also use hydrophilic modified polyisocyanates, in particular when the composition for coating is an aqueous composition for coating. Hydrophilic modified polyisocyanates may be effected by the presence of ionic or nonionic polar groups. Examples of acceptable hydrophilic polyisocyanates are products Bayhydur 3100, Bayhydur XP 2487/1 and Bayhydur XP 2570, which are all available on the company Voeg.

In order to achieve sufficient durability outdoors aliphatic polyisocyanates preferably aromatic polyisocyanates, in particular when to the position for applying the coating is applied as the top layer in a multilayer lacquer coating. Aliphatic groups can be acyclic or cyclic.

Acceptable compounds containing at least two hydroxyl groups, can be monomers, oligomers, polymers and mixtures thereof. Examples of oligomers and monomers with a hydroxyl functional group are castor oil, trimethylolpropane and diols. May be particularly mentioned branched diols such as described in international patent application WO 98/053013, for example 2-butylether-1,3-propandiol. Examples of acceptable polymers include complex oligoarticular, polyacrylonitrile, polycarbonatediol, poliuretanoviy and their compounds and hydrides. Such polymers are generally known to a person skilled in the field of technology and technically available. Acceptable complex oligoarticular, polyacrylonitrile and their mixtures are described, for example, in international patent application WO 96/20968 and in European patent application EP 0688840 A. Examples of acceptable poliuretanovuyu presented in the international patent application WO 96/040813.

In the composition for coating in accordance with the invention, an acceptable value of the equivalent relations isocyanate functional groups to hydroxyl groups is in the range of 0.5 to 4.0, preferably in the range of 0.7 to 2.5, and more preferably in the range from 0.8 to 1.2. Usually the mass of the wearing binders with hydroxyl functional groups for cross-linking agent with the isocyanate functional group in the composition of the coating in terms of the content of non-volatiles is in the range from 85:15 to 15:85, preferably in the range from 70:30 to 30:70.

Composition for coating in accordance with the invention further includes a sensitizer. The sensitizer is an absorbing radiation agent, which enhances the activation votolatino catalyst. The sensitizer can be used to increase the spectral sensitivity votolatino catalyst. More specifically, the sensitizer can be added in the radiation-curable composition for activating the composition to radiation having wavelengths outside of the range of absorption of votolatino catalyst.

Examples of suitable sensitizers are thioxanthone, such as isopropylthioxanthone in accordance with the following formula

oxazine and rhodamine. Also acceptable benzophenone and its derivatives. Examples of suitable derivatives of benzophenone are:

in which R1, R2and R3may be the same or different and represent CH3or N,

in which R1, R2and R3may be the same or different and represent CH3or N. Such sensitizers technically available, for example, Phi is IU Lambson. Also acceptable dyes such as Rose Bengal, Methylene blue and Eosin y In the scope of the present invention as sensitizers can also be used which form radicals photoinitiator, such as hydroxyketone, aminoketone, benzophenone and acylphosphatase.

In the presence of the sensitizer is usually used in an amount of from 0.02 to 8 wt.% in terms of dry cured material of the composition for coating, preferably from 0.1 to 4 wt.%.

The composition according to the invention includes fatalaty catalyst for the reaction of the isocyanate-hydroxyl accession. Before irradiation of actinic rays fatalaty the catalyst does not have or has only a low catalytic activity for the reaction of accession isocyanate groups and hydroxyl groups. Fatalaty the catalyst is an organic compound and metal, including latent catalytically active metal, and the atom of this latent catalytically active metal in the organic metal connection with the atoms of other metals are not connected. Organic metal compounds are compounds containing at least one covalent bond between the metal atom and the carbon atom of the organic residue. It should be noted that the complexes formed from metal (ions) and aromati the definition of ring systems, not have a covalent bond between the carbon atoms of the aromatic ring system and a metal atom. Therefore, such complexes, of which examples can be mentioned ferrocene and derivatives as organic metal compounds are not considered. Examples of acceptable catalytically active metals are tin, bismuth, iron, vanadium, cerium, copper and zirconium. In the scope of the invention also provides the use of a mixture potyatinnik catalysts based on the same or different metals.

Photochemically induced cleavage of organic groups attached to the latent catalytically active metal, initiates activation votolatino catalyst. Therefore, in one embodiment, fatalaty catalyst has at least one organic group attached to the metal via photolytic torn communication. In a preferred embodiment, fatalaty catalyst has two organic groups attached to the metal via photolytic break ties. Examples of acceptable photolytic tseplyaesh organic groups attached to the metal, are groups of the formula

-CH2-Ah,

where AG denotes an aromatic group. Examples of acceptable aromatic groups are phenyl which groupings, raftiline group, foreline group, thienyl group, peredelnye groups and N-substituted pyrrole group. Aromatic group optionally substituted, for example, alkyl groups, halide groups, nitro groups and alkoxygroup. Substitution of aryl groups are electron-donating groups such as metoxygroup, can be used to shift the absorption spectrum votolatino catalyst in the direction of longer wavelengths, which allows activation of the less dangerous radiation in the UVA region of the spectrum. Moreover, to saturate the valences of the considered metal to metal atom attach additional groups. Such groups may be monovalent radicals, including hydrogen atom, hydroxyl and ALK(EN)ilen group containing from 1 to 30 carbon atoms which may be linear or branched and may optionally contain one or more heteroatoms or groups selected from a number of atoms of oxygen, nitrogen, sulfur, phosphorus, sulfone, sulfoxy and residue of ester, optionally substituted with epoxy, cyano, amino, thiol, hydroxyl, halogen, nitro, phosphorus, sulfoxy, amido, simple ester, complex ester, urea, urethane, thioester, thioamide, amide, carboxyl, carbonyl, aryl and acyl group is AMI. For a good solubility votolatino catalyst in organic compositions for coating this fatalaty catalyst in the preferred embodiment, is a nonionic, i.e. does not consist of ions and counterions.

Examples of acceptable potyatinnik catalysts are dibutyltin(3-methoxybenzyl)tin, dibutyltin(naphthalene-1-ylmethyl)tin, di(naphthalene-2-ylmethyl)tin. Preferred fatalaty the catalyst is dibutyltindilaurate.

Fatalaty the catalyst is usually contained in the composition in an amount of from 0.01 to 5 wt.% in terms of the amount of nonvolatile substances in the composition. Curing rate usually increases with the proportion of the catalyst, for example at least 0.1 wt.%, at least 0.2 wt.% or at least 0.4 wt.%, in terms of the amount of nonvolatile substances in the composition. An excessively high proportion of catalyst may adversely affect the viability of the song, or may cause excessively fast drying of the coating, which, in turn, can affect its appearance. Therefore, a reasonable proportion of the catalyst does not exceed 4 wt.%, preferably 2.5 wt.%, in terms of the amount of nonvolatile substances in the composition. In some cases, the optimum proportion of catalyst may depend on t the PA of the catalyst and from the target balance viability and speed of cure.

The composition according to the invention can be free from volatile solvents. Another option in order to lower the viscosity to its target level in the composition is injected volatile diluent. In one embodiment, the volatile solvent can be an organic solvent. Examples of suitable organic solvents for the composition for coating are hydrocarbons, such as toluene, xylene, Solvesso®100; ketones, such as acetone, 2-butanone, methylmercaptan and methylisobutylketone; terpenes such as dipentene and pine oil; halogenated hydrocarbons such as dichloromethane and para-chlorobenzotrifluoride; ethers, such as etilenglikolevye ether, DIPROPYLENE ether, disutility ether, daintily ether, dioctyloxy ether; esters such as ethyl acetate, ethylpropyl, n-bodyformat, n-butyl acetate, n-butylphosphonate, n-butylboronic corresponding tert-butyl, sec-butyl and isobutyl esters, esters of linear or branched pentanol, hexanol and octanol, such as 2-ethylhexanol; esters ethers, such as methoxypropylacetate and amoxicilpin. You can also use a mixture of these compounds.

Taking into account current and future legislation, in the preferred embodiment, the composition used in the accordance with the invention, has a low content of volatile organic compounds (VOCS). Examples of acceptable values for VOC content is 500 g/l or less, 420 g/l or less, or 250 g/l or less. The compositions are particularly relevant to the preparation of compositions for coating with low VOC. In comparison with compositions with a high content of VOC compositions with low VOC require a higher concentration of functional groups in the binder substance and often more significant amount of cross-linking catalyst to compensate for the lack of physical drying faster chemical curing. In cases standard ninetenth catalysts required higher reactivity can be achieved only at the expense of the viability of the composition. Therefore, in cases ninetenth catalysts for the preparation of compositions for coating comprising a polyisocyanate and a polyol, with a very low VOC and a good balance of viability and speed of curing, is fraught with problems of a technological nature. Due to the latency of the proposed catalyst compositions such difficulties can be overcome, because such a composition can be without compromising the viability included a relatively large number is and votolatino catalyst. Thus can be achieved a good balance of low VOC content, viability and speed of drying.

In another embodiment, a composition for coating according to the invention is an aqueous composition in which the volatile diluent consists essentially of water. Examples of acceptable binders, serving as compounds containing at least two hydroxyl groups in aqueous compositions for coating are complex oligoarticular, polyacrylonitrile and poliuretanoviy. They can be used in the form of aqueous solutions, dispersions or emulsions. Such binders with a hydroxyl functional group to aqueous compositions for coating in the art generally known. Specific examples presented in the international patent applications WO 01/81441, WO 00/49100 and WO 00/39181.

In addition to the components described above, the composition for coating in accordance with the present invention may contain other compounds. Such connections may be the main binding agent and/or reactive diluents, optionally including a reactive group that can be crosslinked with the above compounds with hydroxyl functional groups and/or cross-linking agents with isoci is more functional group. Examples include acetobutyrate cellulose, epoxy resin with a hydroxyl functional groups, Alcide and gendarmerie polyols such as described in international patent applications WO 93/17060 and WO 99/16810.

Composition for coating may also include latent connection with hydroxyl functional groups, such as compounds, including complex bicyclic ortho-ester, complex Spiro-ortho-ester, Spiro-ortho-silicate group or bicyclic imidately. These compounds and their use are presented in the international patent applications WO respectively 97/31073, WO 2004/031256 and WO 2005/035613. Finally can contain ketone resins, esters of aspergillomas acid and latent or Placentia connection with functional amino groups, such as oxazolidine, catimini, aldimine, diimine, secondary amines and polyamine. These and other compounds skilled in the art will known and referred, inter alia, in US 5214086.

Composition for coating in accordance with the invention may further include other components, additives or excipients that are commonly used in compositions for coating, such as pigments, dyes, surfactants that facilitate the dispersion of pigment substances, razravnivaya and wetting agents, so is e as BYK Byk 306 and 331 of the company Byk Chemie, prevent the formation of rabini agents, defoamers, prevent the formation of stains additives, heat stabilizers, light stabilizers, absorbers of UV rays, antioxidants and fillers. When the composition contains absorbers of UV rays, their quantity and types in the appropriate option is chosen in such a way as to avoid obstruction of the curing of the composition to UV radiation.

In one embodiment, the composition for coating additionally includes prolonging the viability Supplement. Prolonging the viability Supplement is especially beneficial when fatalaty catalyst also shows some degree of catalytic activity in latent form. It can also happen that fatalaty the catalyst contains a catalytically active impurities that degrade the viability of the composition. Prolonging the viability of the additives increase the viability of a composition for coating, i.e. the time between mixing of all components and to the moment when the viscosity becomes too high for the composition, which must be applied. In a suitable embodiment, prolonging the viability of the additive may be contained in the same quantities as mentioned above focoltone catalysts. Preferred prolonging vitality supplements have only l is nil limited or have no negative impact on the drying rate of the composition for coating, in particular, during curing of the coating at elevated temperature, in particular from 40 to 60°C. Thus, these prolonging vitality supplements improve balance viability and speed of drying. Prolonging the viability of the additive may also have a beneficial effect on the appearance of the coating. Examples of acceptable prolonging vitality supplements are containing carboxyl group compounds such as acetic acid, propionic acid and pentane acid. Preferred aromatic containing carboxyl group compounds, in particular benzoic acid.

Other acceptable prolonging vitality supplements are dicarbonyl compounds such as 2,4-pentandiol, phenolic compounds, tertiary alcohols such as tertiary butanol, tertiary amyl alcohol, and containing a thiol group connection. You can also use combinations of the above to improve the viability of additives, such as a combination containing aromatic carboxyl group containing compounds and thiol group of the connection.

The object of the invention is also a method of producing a coating on a substrate. This method includes the following stages:

(a) applying a curable actinic radiation of a coating composition including from the Association, containing at least two isocyanate groups, a compound containing at least two hydroxyl groups, and fatalaty the catalyst reaction of the isocyanate-hydroxyl accession, where fatalaty the catalyst is an organic compound of a metal, comprising a catalytically active metal, and where the atom catalytically active metal in the organic compound of the metal is not associated with the atoms of other metals on a substrate and

(b) irradiating the applied coating composition actinic rays, causing activation votolatino catalyst.

Cured by actinic radiation, the composition of the coating can be deposited on any substrate. The substrate may consist, for example, metal, in particular iron, steel and aluminum, plastic, wood, glass, synthetic material, paper, leather or another layer of the coating. Layer another layer may consist of a composition for coating according to the present invention, or they may serve a different composition for coating. Cured by actinic radiation a composition for coating according to the present invention is particularly useful in the form of non-pigmented coatings, primers, colored by the pigment of the upper layers, primer coatings, and fillers. When it is applied as a primer pokr is involved and/or filling composition acceptable composition for coating includes a corrosion-inhibiting pigments, optionally in combination with fillers. In one embodiment, the method of the composition for coating is applied as a layer in a multilayer lacquer coating, for example in the form of the upper layer in a multilayer lacquer coating. The top layer in the preferred embodiment, is applied in the form of a non-pigmented coating over painted and/or indicating the effect of the soil. Soil can serve as ground water or soil-based solvent. Such multilayer coatings, as a rule, to be applied on the external surface of the car.

These composition for coating and method acceptable for coating objects such as bridges, pipelines, industrial plants and buildings, oil and gas equipment or vehicles. These composition and method particularly well-suited for finishing and re-polishing of cars and large vehicles such as trains, trucks, buses, and airplanes.

In the way of re-polishing of vehicles in accordance with the invention, the composition for coating may be applied to the automobile or its part. The method is acceptable for re-polishing the whole car. Alternatively there is the opportunity for re-polishing damaged the panels or spare parts. However, in another embodiment, re-polishing can be performed to repair minor scratches or dents without re-polishing the entire body panel. This last method is usually called the point of repair. Coating compositions for coating can be performed by any method that is acceptable for applying liquid coating composition on a substrate. Examples of suitable methods are processed by brush, roller and spray. The best results are often achieved when the coating composition is applied by spraying.

As mentioned above, after application of the composition of the coating applied layer of the coating under the influence of actinic radiation cure. Examples of acceptable forms of actinic radiation include radiation of the electron beam, UV radiation and radiation in the visible region of the spectrum. Preferably UV radiation, in particular less dangerous rays in the UVA region of the spectrum. Exposing the applied coating composition can be performed before, during or after evaporation of the volatile diluent, which may, optionally, be contained in the composition for coating. Upon irradiation fatalaty the catalyst is activated with the formation of the active catalyst for the reaction of the isocyanate-hydroxyl accession. Irradiating the applied coating composition during the entire curing period clean the need no. Enough to irradiate up until in the catalytically active materials will not become a substantial part of votolatino catalyst. The actual duration of the exposure depends on the wavelength of the actinic radiation, radiation intensity, and the number and type votolatino catalyst. Acceptable sources of actinic radiation are those that are normal to the electron beam and UV. For example, you can use the UV-radiation sources such as mercury lamps, high, medium and low pressure. Other examples are fluorescent lamps, Materialovedenie light sources, sources, lasers, mercury-xenon lamp emitting UV rays diodes (LEDs) and metallovedenie lamp. In addition, it is possible to use, for example, lamps with gallium and other impurities, mainly for colored pigment coatings. It is also possible to accelerate curing of the composition for coating by using short pulses of actinic radiation.

In one embodiment, the present invention mainly when the non-pigmented curing of the coating speed, the applied composition for coating is irradiated using UV sources low energy, i.e. utverjdayut so-called daylight. Sources of UV irradiation the Oia low energy emit radiation with waves of greater length, than conventional UV sources. Sources of UV radiation low energy hardly emit any radiation in the UV-b region of the spectrum they emit rays mainly in the UV-a region of the spectrum and the emission wavelength at the border in UV-b and UV-a regions of the spectrum. One advantage of using a radiation source emitting radiation having a wavelength of 200≤λ≤500 nm, is that to apply it safer than conventional UV sources, which emit a relatively large number of rays in the UV-b and/or UV-B region of the spectrum. Another advantage is that curing lamp fluorescent light are cheaper than conventional lamps UV rays. Technically available curing lamp fluorescent light are, for example, lamp type for sun decks and a special fluorescent lamp, such as lamp TL03, TL05 and TL10R (Philips) and lamp UV rays BLB (firm CLE Design). As an example, are technically accessible curing lamp fluorescent light, which emits short light pulses, can be mentioned mercury-free xenon flash lamp UV/VDI-radiation. The intensity of the radiation is typically in the range from 0.1 to 100 mW/cm2.

Typically, the duration of irradiation is in the range from 0.01 to 30 minutes typically, irradiation is carried out in the period from 1 s to 15 min After that Oteri is giving is essentially due to the reaction of isocyanate groups and hydroxyl groups with the formation of urethane linkages. Curing is usually complete within a temperature range of 0 to 80°C. In one embodiment, the curing is carried out at room temperature, i.e. in the range of from about 5 to about 40°C. In another embodiment, the curing is completed in a heated vulcanizing chamber, for example, at a temperature of from 40 to 80°C.

As usual in the case of compositions for coating comprising a compound containing at least two isocyanate groups and a compound containing at least two hydroxyl groups, the reaction of isocyanate groups and hydroxyl groups begins by mixing components of the composition, even in the absence of a catalyst, or when the catalyst is contained in a latent form. As a consequence, the composition in accordance with the invention cures, albeit slowly, in areas that are not irradiated, in contrast to curing radiation-curable coatings, which occurs through radical polymerization. This is of particular advantage when the coating is applied to the object three-dimensional shape with folds and hollows. In this case, a uniform distribution of intensity of radiation over the entire coated surface may be difficult or impossible to achieve. As a further consequence of the beginning of the reaction accession isocyanate groups and hydroxyl groups, if shmesani the components of the composition, this last has limited viability. Accordingly, in an acceptable variant composition is prepared as multi-component composition, for example as a two-component composition or as a three-component composition. Therefore, the invention also relates to a kit of parts for preparing cured by actinic radiation a composition for coating application, including:

a) module A), including a compound containing at least two isocyanate groups, and

b) module B)comprising a compound containing at least two hydroxyl groups,

where at least one of the modules (a) and (B) or the plug-In contains a sensitizer and fatalaty catalyst for the reaction of the isocyanate-hydroxyl accession, where fatalaty the catalyst is an organic compound of a metal, comprising a catalytically active metal, and where the atom catalytically active metal in the organic compound of the metal is not associated with the atoms of other metals.

Examples

Used material:

Tolonate HDT-LVThe polyisocyanate-based, which is the trimer of hexamethylenediisocyanate company Rhodia
Complex oligoarticularComplex oligoarticular is accordance with example 2 of the application WO 2002/098942
The solution of the ITCsA mixture comprising 10 parts by weight of isopropylthioxanthone and 90 parts by weight of n-butyl acetate
The solution BMSA mixture comprising 10 parts by weight of Speedcure®BMS company Lambson and 90 parts by weight of n-butyl acetate
A solution of Irgacure 184A mixture comprising 10 parts by weight of Irgacure 184 company Ciba Specialty Chemicals and 90 parts by weight of n-butyl acetate
A solution of BYK 306A mixture comprising 10 parts by weight of BYK 306 firms Byk Chemie and 90 parts by weight of ethyl-3-ethoxypropionate
The solution DBOLA mixture comprising 10 parts by weight of dibutyltindilaurate and 90 parts by weight of n-butyl acetate
The solution votolatino FoundationA mixture comprising 20 parts by weight of the compounds in accordance with the following structure

and 80 parts by weight of n-butyl acetate

Cyclopentadienyl iron, a solution of connectionsA mixture comprising 10 parts by weight of (ETA-5-cyclopentadienyl)(this-6-fluoren)hexaphosphate iron and 90 parts by weight of 2-butanone

The stage of drying the applied layer of the coating was determined manually, and the different is whether the 10 stages of drying:

1. Still wet, the coating is easily washed with a thumb.

2. When you touch the floor with your thumb from the paint can stretch the threads.

3. The coating is magazineto, but is easily damaged to the substrate with a gentle rubbing with his thumb.

4. Rubbing his thumb leaves a clear mark.

5. Careful rubbing with his thumb barely leaves a mark. The beam wool that has fallen on the paint, you can blow off. The coating is dried "from dust".

6. Careful rubbing with your thumb leaves no markings. With a gentle rubbing or pushing with the palm of the hand, you can feel the effect of stickiness.

7. With a gentle rubbing or pushing the palm of the hand stickiness is not noted. The coating is non-stick.

8. With a strong push your thumb leaves a permanent mark.

9. Mark from strong pushing the thumb disappears after 1-2 minutes the Coating is dry to the disappearance of stickiness.

10. The coating can be difficult or impossible to damage by scratching with a nail (of a person). The coating is hardened through and through.

Getting dibutyltindilaurate

In a nitrogen atmosphere in a dry 2-liter, 3-necked flask equipped with addition funnel with pressure compensation, thermometer, magnetic stirrer shaft and refrigerator, downloaded and 35.1 g (1,45 mol) magnesium p the LCD. Was added 200 ml of dry diethyl ether, a small crystal of iodine and 50 ml 182,9 g (1,45 mol) benzylchloride in 800 ml of dry diethyl ether. After about 5 minutes and started the reaction. The start of the reaction was accompanied by the disappearance of the brown color from iodine and the growth temperature. Within one hour was added to the rest of benzylchloride in diethyl ether. The mixture was stirred at room temperature for the next hour. Was given a dark blue solution with a certain amount of residual magnesium. The solution decantation in nitrogen atmosphere and in other dry 2-liter, 3-necked flask to remove residual magnesium. The solution benzylaniline was cooled in an ice bath. The addition funnel was filled with a solution 109,8 g dibutylformamide (0.36 mol) in 300 ml of dry diethyl ether. Then stir in benzylaniline for 30 min solution was added dibutylformamide maintaining maximum reaction temperature of 25°C. the Reaction mixture was stirred over night at room temperature. The next day, the mixture was slowly poured into 3 liter chemical beaker filled with 300 g of crushed ice. The mixture was stirred for several minutes, allowing the ice to melt. 2 M hydrochloric acid was added to until the pH value reached about 7. The organic phase, with the holding of the product, washed with water and subsequently dried with anhydrous magnesium sulfate. The solution was filtered and the solvent was removed with a rotary evaporator (40°C./10 mbar). Received a colorless liquid. The resulting liquid was found to contain 92.1 per cent dibutyltindilaurate and 7.9% dibenzyl. Dibenzyl was removed by distillation from a flowing liquid film at 110°C. the resulting product (138 g, 92%yield) identified H-NMR as dibutyltindilaurate: 5 (h/m)=0,82 (m, 5H); to 1.21 (m, 2H); 1.32 to (m, 2H); 2,28 (t, 2H); of 6.8 to 7.3 (m, 5H).

Getting dibutyltin(1-naphthaleneacetic)tin

In a nitrogen atmosphere in a dry 2-liter, 3-necked flask equipped with addition funnel with pressure compensation, thermometer, magnetic stirrer shaft and refrigerator loaded 7,29 g (0.3 mol) of magnesium shavings. Added 30 ml of dry diethyl ether, a small crystal of iodine and about 50 ml to 53.0 g (0.3 mol) of 1-(chloromethyl)naphthalene in 900 ml of dry diethyl ether. After about 5 minutes and started the reaction. The start of the reaction was accompanied by the disappearance of the brown color from iodine and the growth temperature. Within one hour was added to the rest of 1-(chloromethyl)naphthalene in diethyl ether. The mixture was stirred at room temperature for the next hour. Received a yellow solution with a certain amount of residual magnesium. The solution decantation in a nitrogen atmosphere is E. in other dry 2-liter, 3-necked flask to remove residual magnesium. A solution of (1-naphthaleneacetic)minikleid was cooled in an ice bath. The addition funnel was filled with a solution of 22.8 g of dibutylformamide (0.15 mol) in 75 ml of dry diethyl ether. Then stir in (1-naphthaleneacetic)minikleid for 30 min solution was added dibutylformamide maintaining maximum reaction temperature of 25°C. the Reaction mixture was stirred over night at room temperature. The next day, the mixture was slowly poured into 3 liter chemical beaker filled with 100 g of crushed ice. The mixture was stirred for several minutes, allowing the ice to melt. 2 M hydrochloric acid was added to until the pH value reached about 7. The organic phase containing the product was washed with water and subsequently dried with anhydrous magnesium sulfate. The solution was filtered and the solvent was removed with a rotary evaporator (40°C./10 mbar). Received the product as a yellow oil. This oil was transferred into a distillation apparatus Cuellar. Low-boiling by-products were removed by vacuum distillation apparatus Cuellar (100°C, 0.08 mbar). The remainder identified as dibutyltin(1-naphthaleneacetic)tin. H-NMR: δ (h/m)=0,69 (m, 5H); 1,04 (m, 2H); to 1.15 (m, 2H); 2.63 in (t, 2H); the 6.9 to 7.8 (m, 7H).

Getting dibutyltin(3-methoxybenzyl)tin

In a nitrogen atmosphere in a dry 500 ml 3-neck the flask, equipped with addition funnel with pressure compensation, thermometer, magnetic stirrer shaft and refrigerator, downloaded 3.1 g (0.13 mol) of magnesium shavings. Added 15 ml of dry diethyl ether, a small crystal of iodine and about 15 ml of a solution of 20.0 g (0.13 mol) of 3-methoxybenzylamine in 100 ml of dry diethyl ether. After about 5 minutes and started the reaction. The start of the reaction was accompanied by the disappearance of the brown color from iodine and the growth temperature. Within one hour was added to the rest of the 3-methoxybenzylidene in diethyl ether. The mixture was stirred at room temperature for the next hour. Was given a dark blue solution with a certain amount of residual magnesium. The solution decantation in nitrogen atmosphere and in other dry 500 ml 3-necked flask to remove residual magnesium. A solution of 3-methoxybenzylamine was cooled in an ice bath. The addition funnel was filled with a solution of 16.2 g of dibutylformamide (0.11 mol) in 40 ml of dry diethyl ether. Then stir in 3-methoxybenzylamine for 30 min solution was added dibutylformamide maintaining maximum reaction temperature of 25°C. the Reaction mixture was stirred over night at room temperature. The next day, the mixture was slowly poured into 500 ml chemical glass, napolneny the 50 g of crushed ice. The mixture was stirred for several minutes, allowing the ice to melt. 2 M hydrochloric acid was added to until the pH value reached about 7. The organic phase containing the product was washed with water and subsequently dried with anhydrous magnesium sulfate. The solution was filtered and the solvent was removed with a rotary evaporator (40°C./10 mbar). Received a colorless liquid (23,6 g, 93%yield), which was identified as dibutyltin(3-methoxybenzyl)tin. H-NMR: δ (h/m)=0,80 (m, 5H); 1,19 (m, 2H); 1.32 to (m, 2H); 2,24 (t, 2H); 3,71 (s, 3H); 6,4-6,6 (m, 3H);? 7.04 baby mortality (t, 1H).

Examples 1 to 3

Composition non-pigmented coatings 1 to 3, including different focoltone catalysts were prepared by mixing the components, as indicated in table 1:

0.15 g
Table 1
Componentexample 1example 2example 3
Tolonate HDT-LV10.0 g10.0 g10.0 g
Complex oligoarticular10.0 g10.0 g10.0 g
Dibutyltindilaurate--
Dibutyltin(1-naphthalenyloxy)tin-0.20 g-
Dibutyltin(3-methoxybenzyl)tin--0,23 g
A solution of BYK 3060.35 g0.35 g0.35 g
Xylene3.5 g3.5 g3.5 g

Examples 4 through 6

Composition non-pigmented coatings 4 and 6, which included different sensitizers, were prepared by mixing the components shown in table 2:

Table 2
Componentexample 4example 5example 6
Tolonate HDT-LV10.0 g10.0 g10.0 g
Complex oligoarticular10.0 g10.0 g 10.0 g
Dibutyltindilaurate0.15 g0.15 g0.15 g
The solution of the ITCs0.50 g--
The solution BMS-0.50 g-
A solution of Irgacure 184--0.50 g
A solution of BYK 3060.35 g0.35 g0.35 g
Xylene3.5 g3.5 g3.5 g

Comparative examples a to G

Comparative composition non-pigmented coating And G were prepared by mixing the components listed in table 3. Comparative composition And added catalyst did not contain. Comparative composition B included well-known placently the catalyst, i.e. dibutyltindilaurate. Comparative compositions C and D included well-known focoltone catalysts that are not covered by the scope of the present invention.

Table 3
Componentaexample Bexampleexamples G
Tolonate HDT-LV10.0 g10.0 g10.0 g10.0 g
Complex oligoarticular10.0 g10.0 g10.0 g10.0 g
BYK 3060.03 g0.03 g0.03 g0.03 g
Xylene4.0 g4.0 g4.0 g4.0 g
The solution DBOL-0.14 g--
The solution votolatino Foundation--0.8 g-
Solution connect cyclopentane neljalta ---0,48 g

Composition non-pigmented coating was applied using a doctor blade on a metal plate, pre-coated light grey coilcoating obtaining a dry layer thickness of 60 μm.

Periods of drying, non-pigmented coatings are summarized below in table 4.

Table 4
ExampleGelling time (h)Drying time (h)1)The drying time of irradiation in the UV-a spectral region (h)2)The drying time of irradiation in the UV-B region of the spectrum (h)3)
1>24>310,50
2>24>30,650,25
3>3<24>310,25
4 >24>30,300,33
5>24>30,25ND4)
6>24>30,53ND
And>24>24>3ND
B<0,61,5NDND
In>24>24>24ND
G6-72,50,25-0,5ND
1) was determined at 21°C without exposure to UV radiation, the time until then, until there was a phase drying 9, as described above
2) was determined during irradiation lamp TL 10, rays emitted VUV-the region of the spectrum, at a distance of 10 cm between the lamp and the coated substrate; the time until then, until there was a phase drying 9, as described above
3) was determined during irradiation lamp TL 12 which emitted rays in the UV-B region of the spectrum at a distance of 10 cm between the lamp and the coated substrate; the time until then, until there came a phase of drying 9, as described above
4) is not defined

According to table 4, we can conclude that the composition for coating according to the invention show a long time gelatinization. This is the time between mixing the components and gelatinization of the composition, when stored at room temperature. In most cases, the gelling time is the same as the time of gelatinization comparative compositions A, not including added catalyst at all. For a long time gelatinization also indicates that the compositions have long-term viability. Gelling time comparative composition B, comprising placently curing catalyst, was very short. The drying time of the compositions were also determined without exposure to UV radiation, i.e. the irradiation of normal fluorescent light. In these circumstances, all to the position, including latent catalyst showed very slow drying, pointing to the fact that they are not prone to activation in relation to curing unintended impacts of conventional fluorescent light, for example, before applying. Examples 1 through 3 show that the method in accordance with the invention provides rapid curing of coatings by irradiation of UV rays, even when the composition for coating does not include a sensitizer. Activation of the catalyst is possible less dangerous rays in the UV-a and UV-B spectral regions, and does not require hazardous radiation in the UV spectral region. Compositions in accordance with the invention examples 4 through 6 were additionally included a sensitizer. These compositions showed even faster drying when exposed to rays in the UV-a spectral region than the compositions of examples 1 to 3 without sensitizer. It should be noted that the periods of drying in examples 1 through 6 in accordance with the invention was found to be shorter than the drying time in comparative example B, which included placently catalyst. The material of the comparative example And without any added catalyst had a very long time gelatinization and unacceptably long curing time. The occurrence of any paint applied and solidified depigmentary the coatings was determined visually by comparison with the material of comparative example B, which served as a reference. All non-pigmented coatings of examples 1 to 6 had an acceptable color and, therefore, were acceptable for the purposes for which you want the color according to the surrounding covered surfaces.

The material of comparative example included votolatino basis. Upon irradiation with UV rays, the composition did not show sensitivity to curing. The material of comparative example G as a latent catalyst included (this is a 5-cyclopentadienyl)(this-6-fluoren)hexaphosphate iron in accordance with US 4740577. This compound had no covalent bond between the iron and the carbon atom in the organic group. The latency of this compound was not quite satisfactory, indicating a relatively short time gelatinization and drying time without UV radiation. Moreover, utverjdenie coating of comparative example G was painted and, therefore, unacceptable for the purposes for which you want the color according to the surrounding covered surfaces.

1. Cured by actinic radiation a composition for coating comprising a compound containing at least two isocyanate groups, a compound containing at least two hydroxyl groups, a sensitizer and fatalaty catalyst DL the reaction of the isocyanate-hydroxyl accession, where fatalaty the catalyst is an organic compound and metal, including tin as a catalytically active metal, and where the atom catalytically active metal in the organic compound of the metal is not associated with the atoms of other metals.

2. Cured by actinic radiation a composition for coating according to claim 1, in which fatalaty catalyst has at least one organic group attached to the metal via photolytic break the connection.

3. Cured by actinic radiation a composition for coating according to claim 2, in which fatalaty catalyst has two organic groups attached to the metal via photolytic break ties.

4. Cured by actinic radiation a composition for coating according to claim 2, in which at least one organic group attached to the metal via photolytic torn communication is the aryl group.

5. Cured by actinic radiation a composition for coating according to claim 4, in which the aryl group is a benzyl group.

6. Cured by actinic radiation a composition for coating according to claim 1, which represents the composition of the non-pigmented coating.

7. The method of obtaining covered the I on the substrate, includes the following stages:
(a) applying a curable actinic radiation of a coating composition that includes a compound containing at least two isocyanate groups, a compound containing at least two hydroxyl groups, and fatalaty the catalyst reaction of the isocyanate-hydroxyl accession, where fatalaty the catalyst is an organic compound and metal, including tin as a catalytically active metal, and where the atom catalytically active metal in the organic compound of the metal is not associated with the atoms of other metals on a substrate and
(b) irradiating the applied coating composition actinic rays, causing activation votolatino catalyst.

8. The method according to claim 7, in which the curing actinic radiation a composition for coating further includes a sensitizer.

9. The method according to claim 8, in which the applied coating composition is irradiated with radiation in the UVA region of the spectrum.

10. The method according to claim 7, which is carried out for finishing and re-polishing of automobiles and vehicles.

11. The method according to claim 7, in which the resulting coating is a layer in a multilayer lacquer coating.

12. The method according to claim 11, in which the coating obtained is an upper layer in a multilayer paint pok is the eve ENT.

13. Kit of parts for preparing cured by actinic radiation a composition for coating, including
a) module A), including a compound containing at least two isocyanate groups, and
b) module B)comprising a compound containing at least two hydroxyl groups,
where at least one of the modules (a) and (B) or the plug-In contains a sensitizer and fatalaty the catalyst reaction of the isocyanate-hydroxyl accession, where fatalaty the catalyst is an organic compound and metal, including tin as a catalytically active metal, and where the atom catalytically active metal in the organic compound of the metal is not associated with the atoms of other metals.



 

Same patents:

FIELD: textile industry.

SUBSTANCE: fabric is of polyester or polyetheretherketone type. The fabric coating is produced by way of cross-linking anionic aliphatic dispersion with OH-number < 0.5 with hydrophilous aliphatic polyisocyanate, preferably, based on hexamethylenediisocyanate with NCO value 17-18. The fabric may be woven of already coated fibres or filament yarns. The coating is applied on the fabric by way of its contacting with a gluing compound containing a gluing substance activated to perform cross-linking when heated. Then the fabric is ironed at a temperature of 95-100°C. The fabric is pitched on structures at a surface temperature, with the seams and laps not heated over 100°C. The invention excludes the necessity of further application of coating on the fabric after application the coating which ensures application of a significantly less weight in the process of coating.

EFFECT: one eliminates application of any organic solvents in the gluing compounds providing for tension of oil varnishes, liquifiers, fillers or coloured oil varnishes and offers an environmentally safe method for application of coating on an aircraft.

9 cl, 3 ex

FIELD: chemistry.

SUBSTANCE: radiation curable secondary coating composition contains an Alpha-oligomer which does not contain urethane, obtained via reaction of (a) an acrylate compound selected from alcohol-containing acrylate or alcohol-containing methacrylate compound, (b) an anhydride compound, (c) an epoxide-containing compound, (d) an optional chain extender compound, and (e) an optional catalyst, where said composition additionally contains a Beta-oligomer, where said Beta-oligomer is different from said Alpha-oligomer, where said Beta-oligomer is obtained via reaction of (β1) hydroxyethyl acrylate; (β2) one or more diisocyanates; (β3) polyester polyol or polyether polyol with number-average molecular weight ranging from 300 g/mol to 10000 g/mol; and (β4) a catalyst. The secondary coating composition can additionally contain a Gamma-oligomer which is epoxy diacrylate. The invention also relates to a method coating an optical fibre involving a) using a glass drawing column to obtain optical glass fibre; and b) applying a radiation-curable primary coating composition onto said optical glass fibre; c) optional exposure of said radiation-curable primary coating composition to radiation in order to cure said coating; d) applying a radiation-curable secondary coating composition onto said optical glass fibre; e) and exposing said radiation-curable secondary coating composition to radiation in order to said coating. The invention also relates to a coated wire and a coated optical fibre. The radiation-curable secondary coating on the wire and optical fibre has the following properties after initial curing and after one month of ageing at 85°C and 85% relative humidity: A) % RAU from 80% to 98%; B) in-situ modulus of elasticity between 0.60 GPa and 1.90 GPa; and C) Tc of the tube from 50°C to 80°C.

EFFECT: improved coating properties.

8 cl, 5 tbl

FIELD: chemistry.

SUBSTANCE: radiation-curable secondary coating composition contains A) a mixture of secondary coating oligomers which is mixed with B) a first diluent; C) a second diluent; D) an antioxidant; E) a first photoinitiator; F) a second photoinitiator; G) an optional slide-enhancing additive or a mixture of slide-enhancing additives; where said mixture of secondary coating oligomers contains α) Alpha-oligomer; β) Beta-oligomer; γ) Gamma-oligomer; where said Alpha-oligomer is synthesised via reaction of αl) anhydride with α2) acrylate containing a hydroxyl group; and the reaction product of α1) and α2) then reacts with α3) epoxide; in the presence of α4) a first catalyst; α5) a second catalyst; and α6) a polymerisation inhibitor; to obtain an Alpha-oligomer; where said Beta-oligomer is synthesised via reaction of β1) acrylate containing a hydroxyl group; β2) diisocyanate; and β3) polyether polyol; in the presence of β4) a catalyst; where said catalyst is selected from a group containing copper naphthenate, cobalt naphthenate, zinc naphthenate, triethylamine, triethylene diamine, 2-methyltriethylene diamine, dibutyl tin dilaurate, metal carboxylates, sulphonic acids, catalysts based on amines or organic bases, zirconium and titanium alkoxides, and ionic liquid salts of phosphonium, imidazolium and pyridinium, and said Gamma-oligomer is epoxy diacrylate. The method of applying the coating onto an optical fibre involves a) using a glass drawing column to obtain optical glass fibre; and b) applying a radiation-curable primary coating composition onto said optical glass fibre; c) optional exposure of said radiation-curable primary coating composition to radiation in order to cure said coating; d) applying a radiation-curable secondary coating composition onto said optical glass fibre; e) and exposing said radiation-curable secondary coating composition to radiation in order to said coating.

EFFECT: improved technological or operational characteristics of secondary coating, particularly improved curing and high rate of curing.

5 cl

FIELD: chemistry.

SUBSTANCE: polyvinyl butyral, surfactant, plasticiser and water are fed into a screw extruder. The components are mixed in the first zone of the extruder to form a welding mass. The welding mass is moved to the second zone of the extruder. Water is added to the welding mass in the second zone and mixed, and water is injected to a zone with high pressure, temperature and shear.

EFFECT: disclosed method enables fast and cheap production of an emulsion of plasticised polyvinyl butyral.

12 cl, 8 dwg, 7 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for extreme media used in agriculture, cosmetology and everyday life. The compositions contain a surfactant based on an organosilicon compound of the formula: MM', where M=R1R2R3SiO1/2; M'=R4R5R6SiO1/2; where R1 is selected from a group consisting of a branched monovalent hydrocarbon radical containing 3-6 carbon atoms, and R7, where R7 has the formula: R8R9R10SiR12, R8, R9 and R10 are each independently selected from monovalent hydrocarbon radicals containing 1-6 carbon atoms and monovalent aryl or alkylaryl hydrocarbon radicals containing 6-13 carbon atoms, and R12 is a divalent hydrocarbon radical containing 1-3 carbon atoms, R2 and R3 are each independently selected from a group of monovalent hydrocarbon radicals containing 1-6 carbon atoms or R1, with R4 in form of alkyl polyalkylene oxide of general formula: R13(C2H4O)a(C3H6O)b(C4H8O)cR14, where R13 is a divalent straight or branched hydrocarbon radical, having the structure: -CH2-CH(R15)(R16)dO-, where R15 is H or methyl; R16 is a divalent alkyl radical with 1-6 carbon atoms, where the subscrip d is equal to 0 or 1; R14 is selected from a group consisting of H, monovalent hydrocarbon radicals with 1-6 carbon atoms and acetyl, where subscripts a, b and c are equal to zero or positive numbers and satisfy the following relationships: 2≤a+b+c ≤20 for a≥2, and R5 and R6 are each independently selected from a group of monovalent hydrocarbon radicals containing 1-6 carbon atoms or R4. The compositions have hydrolysis resistance in a wide pH range.

EFFECT: invention increases hydrolytic stability of the compositions.

65 cl, 21 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for extreme media used in agriculture, cosmetology and everyday life. The surfactant compositions for extreme media contain organically modified hydrolysis-resistant disiloxane surfactants which are based on an organosilicon compound of formula: MM', where M = R1R2R3SiO1/2; M' = R4R5R6SiO1/2; where R1 is selected from a group consisting of a branched monovalent hydrocarbon radical containing 3-6 carbon atoms, and R7, where R7 has the formula: R8R9R10SiR12, R8, R9 and R10 are each independently selected from a group of monovalent hydrocarbon radical containing 1-6 carbon atom and monovalent aryl or alkylaryl hydrocarbon radical containing 6-13 carbon atoms, and R12 is a divalent hydrocarbon radical containing 1-3 carbon atoms, R2 and R3 are each independently selected from a group of monovalent hydrocarbon radicals containing 1-6 carbon atoms or R1, with R4 in form of alkylpolyalkylene oxide of general formula: R13(C2H4O)a(C3H6O)b (C4H8O)cR14, where R13 is a divalent straight or branched hydrocarbon radical, having the structure: -CH2-CH(R15)(R16)dO-, where R15 is H or methyl; R16 is a divalent alkyl radical consisting of 1-6 carbon atoms, where the subscript d can be equal to 0 or 1; R14 is selected from a group consisting of H, monovalent hydrocarbon radicals consisting of 1-6 carbon atoms and acetyl, where subscripts a, b and c are equal to zero or positive numbers and satisfy the following relationships: 2≤a+b+c≤20 for a ≥2, and R5 and R6 are each independently selected from a group of monovalent hydrocarbon radicals containing 1-6 carbon atoms or R4. The compositions are resistant to hydrolysis in a wide pH range.

EFFECT: invention increases hydrolytic stability of the compositions.

65 cl, 21 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: prepolymer composition for making sealants and coatings contains polyurethane prepolymers with blocked terminal NCO groups in which 50-100% terminal NCO groups are blocked silane groups and the remaining terminal NCO groups are blocked alcohol groups, where said composition contains unreacted aromatic alcohol in amount of not more than 0-15 mol % in terms of content of terminal NCO groups in the prepolymer, where the aromatic alcohol is selected from a group comprising phenol, 3-methoxyphenol, 4-methoxyphenol, nonylphenol, meta-cresol, para-cresol, 4-chlorophenol, meta-hydroxybenzaldehyde, ortho-hydroxybenzaldehyde, para-hydroxybenzaldehyde, hydroquinone, 3-hydroxyacetophenone and 4-hydroxyacetophenone. The invention also relates to a sealant containing said prepolymer composition and a catalyst for increasing the rate of cross-linking prepolymers as part of said prepolymer composition in a moist atmosphere.

EFFECT: high resistance to weather, high temperature and UV radiation.

15 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a powder coating composition obtained from aqueous dispersion containing polymer-encapsulated particles, said particles including particles encapsulated in a brittle polymer which can easily break up under ambient conditions. The invention also discloses a method of preparing an aqueous dispersion of particles encapsulated in a brittle polymer, a base which is at least partially coated with a coating deposited from said composition, a multilayer composite coating, a method of preparing a powder coating composition, a method of preparing an aqueous dispersion of particles encapsulated in a brittle polymer and a powder coating composition formed from said dispersion prepared using said method, as well as a reflecting surface which is at least partially coated with a layer which gives the colour of an uncovered coating deposited from disclosed powder coating compositions.

EFFECT: obtaining aqueous dispersion of particles encapsulated in a brittle polymer in which repeated agglomeration of particles is minimised and which enables to obtain a powder coating composition which contains multiple polymer-encapsulated particles having maximum turbidity so that the coating has absorption or reflection in the visible spectrum which is close to that of the given coating.

22 cl, 14 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: disclosed is a colourless luminescent decorative paint containing a luminophor and binder. The luminophor is an organic luminophor with anomalously large Stokes shift which is greater than 100 nm, which is colourless in daylight and luminescent in the visible spectral region when illuminated with a source of UV radiation. The organic binder is a transparent organic substance which does not absorb long-wave ultraviolet radiation in the 365-420 nm range.

EFFECT: obtaining fast and stable luminescent paint which contains a colourless organic luminophor, which enables to create a latent image which appears upon illumination with UV radiation which is invisible in daylight as well as in the dark, in the absence of UV radiation, the paint ensures high strength of the polymer base of the decorative layer of the article obtained using said paint.

13 cl, 8 ex

FIELD: construction.

SUBSTANCE: anti-corrosion protective coating consists of the first element - a single-component moisture-hardened isocyanate primer, which contains at least 75 wt % of a nonvolatile residue and 6…8 wt % of isocyanate groups. The second element is a thick-layer external coating, to produce which a double-component polyurea-urethane mastic is used, containing an isocyanate prepolymer on the basis of diphenyl methane diisocyanate with mass portion of NCO-groups making 15…17% and dynamic viscosity at the temperature of (20±3)°C - 3…10 Pa·s, and the component it hardens with active atoms of hydrogen with hydroxyl number making 95…105 mgKOH/g, mass portion of total titrated nitrogen of 4.2…4.5%, containing a mixture of simple or complex polyester diol with molecular weight of 800…1000 c.u., sterically hindered diamine with amine number of 12…16.7%, oxypropylated ethylene diamine with hydroxyl number of 640…800 mgKOH/g and liposoluble organic pigments, at the ratio of isocyanate prepolymer to a component with active atoms of hydrogen, which ensures hardening of a thick-layer external coating until the required level of operational characteristics is produced.

EFFECT: coating ensures high level of adhesion, resistance to cathode lamination with preservation of the main physical-mechanical indices and ecological safety in process of insulation works.

3 tbl

FIELD: chemistry.

SUBSTANCE: invention discloses a radiation-chemical method of producing luminescent fluoroplast-4. A block or film type article made from polytetrafluoroethylene undergo treatment with gamma-rays with average energy of 1.25 MeV at temperature higher than the melting point of the crystalline phase. Treatment is carried out in the presence of water vapour at pressure 10-2-1 mm Hg and dose rate of 1-5 Gy/s to an absorbed dose of 200 kGy.

EFFECT: disclosed method ensures obtaining a novel modification of fluoroplast-4 - polytetrafluoroethylene having intense fluorescence in the visible spectrum.

1 dwg, 1 tbl, 1 ex

FIELD: chemical industry; radiation-chemical methods of the production of the polymeric materials with the improved complex of properties.

SUBSTANCE: the invention is pertaining to the field of the radiation-chemical methods of production of the polymeric materials with the improved complex of properties. The invention presents the description of the method of the radiation-chemical modification of the polytetrafluorethylene providing for treatment of the articles made out of the polytetrafluorethylene with the gamma-rays exceeding the temperature of the fusion point of the crystalline phase differing that the block and the film articles are subjected to this radiation and this radiation is conducted at presence of the molecular oxygen, at the oxygen tension of 102 - 1 mmHg. The invention also presents the description of the substance produced by the above indicated method. The technical result of the invention is production of the substance possessing the high indexes of the wear-resistance and creepage.

EFFECT: the invention ensures production of the substance possessing the high indexes of the wear-resistance and creepage.

3 cl, 3 tbl, 7 dwg, 2 ex

FIELD: chemistry of polymers.

SUBSTANCE: invention describes a method for applying thin films made of polytetrafluoroethylene on surface of solid bodies. Method involves formation of film from tetrafluoroethylene vapor directly under pressure 0.1-20 torr by effect of electrons beam with energy 1-1000 keV in working chamber separated from electrons source. The process is carried out at density of electrons flow falling on solid body surface in the range from 30 to 6000 μA/cm2 followed by roasting applied films under vacuum or inert atmosphere without intermediate contact with air at temperatures 250-400°C for 0.5-1 h. Roasting films is carried out at 350°C for 1 h, and the process is carried out preferably at electrons flow density falling on surface of solid body in the range 100-3000 μA/cm2, tetrafluoroethylene vapor pressure in the range 1-10 torr and energy pf electrons beam 10-200 keV. The proposed method provides preparing uniform thin films made polytetrafluoroethylene showing high thermal stability and retaining low values of their dielectric penetrability. Invention can be used in electronic engineering, optics and medicinal equipments.

EFFECT: improved applying method.

3 cl, 1 tbl, 9 ex

FIELD: polymers.

SUBSTANCE: invention relates to a method for modifying a material surface made, in particular, of polypropylene. Method involves activation of material surface by effect of glow charge between aqueous solution and anode located over aqueous solution under atmosphere pressure, treatment of activated surface in a macroheterocycle solution and washing out from its excess. Activation of material surface and treatment of activated surface are carried out simultaneously in an aqueous solution of cobalt phthalocyanine disulfoacid in its concentration 0.3-0.6 g/l for 15-30 min and washing out is carried out in sodium hydroxide aqueous solution in the concentration 0.07-0.1 g/l. Invention provides enhancing the catalytic activity of modified material up to 70%, decreasing time for the activation process up to 30 min and enhancing ecological safety of the process.

EFFECT: improved modifying method.

1 tbl

FIELD: compositions for fluoro-polymer coats.

SUBSTANCE: proposed composition contains separate particles of fluoro-polymer having polymer hydrophilic macro-moleculars connected to them by high energy treatment. Proposed invention refers also to method of treatment of fluoro-polymer, method of treatment of fluoro-polymer particle surfaces, method of imparting property of wetted surface to particles of inert polymer powder and method of modification of molecular mass of fluoro-polymer particles. This method makes it possible to change chemical functional groups of particle surface, thus changing the characteristics of particle surface. These characteristics enhance suitability of particles and make them highly dispersible even in water.

EFFECT: enhanced efficiency.

28 cl, 5 tbl, 7 ex

FIELD: polymer materials.

SUBSTANCE: method of applying high-resolution image of functional layers, e.g. for applying lithographic mask or other functional layers, comprises polymerization of monomers from vapor phase under action of finely focused electron beam with energy 1 to 1000 keV followed by injection of monomer vapors at pressure from 10-4 to 10 torr. Electron beam is introduced into working chamber through a small opening in membrane, which enables avoiding scattering of electrons on membrane and, at the same time, maintaining monomer vapor pressure in working chamber high enough to ensure acceptable growth time for thickness (height) of image line. Preferred image applying conditions are the following: electron energy in electron beam 10 to 500 keV and monomer vapor pressure 0.001 to 10 torr. For electron beam diameter 50 nm, image width 100-150 nm can be obtained. When improving electron beam focusing, accessible electron beam diameter may be further diminished.

EFFECT: enabled high-resolution image of functional layers directly from monomer in single-step "dry" process without using any solvents.

2 cl, 2 dwg, 8 ex

The invention relates to a method for coating a rubber-based GFR-32 to protect the rubber surface from the action of aggressive media

The invention relates to methods for polymer composite materials on the basis of polydimethylsiloxane rubber, not having in its composition of active groups, and can be used to produce films, thin-film and bulk products in mechanical engineering, electrical engineering, medical, food and other industries

The invention relates to a device for the impregnation of fibrous fillers of various polymeric binder and can be used in the manufacture of fibrous composite materials (fiberglass, organoplastic, plastics)

The invention relates to the chemical industry, in particular for surface modification of polymeric materials
Coating composition // 2393189

FIELD: chemistry.

SUBSTANCE: invention relates to compositions used as protective coating for wood, concrete, glass and metal. The composition contains the following in pts. wt: 30-70 polyoxypropylenetriol with molecular weight of 3000-5000, 65-70 polyisocyanate based on 4,4'-diphenylmethanediisocyanate, 0.1-0.2 tin dibutyldilaurate, 70-30 diphenylolpropane and 125 acetone as a solvent.

EFFECT: composition enables to increase hardness and strength of coatings, shorten hardening time of the composition and improve its environmental friendliness through reduction of amount of polyisocyanate used.

19 ex, 1 tbl

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