Method of producing dispersions of blocked polyurethane prepolymers, use thereof to obtain coating agents, adhesive substances and sealants and elastomers obtained using said dispersions, as well as substrates having coatings obtained using said dispersions

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing dispersions of blocked polyurethane prepolymers, use of dispersions obtained using said method to produce coating agents, adhesive substances and sealants and elastomers, said application products themselves, as well as substrates provided with coating agents. The method involves the following: I) a blocked polyurethane prepolymer is obtained first by reacting a) 100 equivalent % of at least one polyisocyanate with b) 50-90 equivalent %, in terms of isocyanate reactive groups, of a thermally split blocking agent, c) 5-45 equivalent %, in terms of isocyanate reactive groups, monohydroxycarboxylic acid as a hydrophilic agent and d) 0-25 equivalent %, in terms of isocyanate reactive groups, of polyhydroxycarboxylic acid as a hydrophilic agent and e) 0-15 equivalent %, in terms of isocyanate reactive groups, of at least one, in terms of isocyanate reactive groups, di- or polyfunctional component of a chain extender with molecular weight from 32 to 350 g/mol, where i) this takes place using (partially) water-miscible organic solvents which are inert to NCO-groups and have boiling point lower than 120°C (at 1013 mbar), ii) and they are used in such an amount that the polyurethane prepolymer contained in the reaction solution after complete conversion ranges from 70 to 98 wt %. Further, II) the polyurethane prepolymer solution obtained at step (I) is dispersed in water, where before, during or after dispersion, deprotonation of carboxylic acid groups with a base takes place at least partially, and then III) if needed, the contained organic solvent is completely removed during dispersion via distillation.

EFFECT: obtaining polyurethane dispersions which are stable during storage, endow said products of their application with good optical properties, high resistance to chemical reagents and pendulum hardness.

13 cl, 10 ex, 1 tbl

 

The invention relates to the field of polyurethane chemistry, in particular to a method for producing dispersions of blocked polyurethane prepolymers and their use to obtain funds for coatings, adhesives and sealants and elastomers produced using the dispersions, as well as substrates with coatings using dispersions.

In recent years, has increased the importance of water varnishes and means for coatings due to increasing trends in emissions related solvents released during the application of varnishes. Meanwhile, although for many applications are available aqueous lacquer systems, they are often unable to achieve a high level of quality of conventional, solvent-based varnishes in relation to resistance to solvents and chemical reagents or elasticity and mechanical load.

Aqueous lacquer systems based on aqueous polyurethane dispersions, also often contain significant amounts of solvent. To resolve this solvent in the case of polyurethane dispersions in the General case it is not possible, as the receipt of the respective dispersions through the prepolymers often requires a solvent or dispersion often must be added the so-called co-solvent (coalescense tool), in order to achieve snizeni the minimum temperature of film forming. This ensures that upon receipt of a film means for the protective layer are formed of very hard layers at or below room temperature. The storage stability PUR dispersions and varnish composition without solvent also often not achieved.

In particular, the solvent is N-MP (N-organic) is widely distributed in the area of aqueous dispersions and coatings. An example of a polyisocyanate are stitched dispersion, gidratirovannye carboxylic acids, with the locked dimethylpyrazolo (SLE) isocyanate groups, which are described in European patent application EP-A 0942023. These stitched dispersion, and made from them varnishes contain as a co-solvent N-MP.

Free co-solvent receiving DMP blocked polyisocyanate crosslinking described in European patent application EP-A 0942023, due to the refusal of the solvent impossible for reasons of viscosity.

Described in the International application WO 1997012924, gidratirovannye nonionic way polyisocyanate stitched dispersion blocked with a pyrazole isocyanate groups contain about 7% of butylglycol. It differs, similar to N-MP, a relatively high boiling point. Department to get free from solvent dispersions impossible.

In German patent DE 19914885 describes polyurethane di is Persia with the locked dimethylpyrazolo isocyanate groups to obtain a dressing made of fiberglass. These dispersions are obtained using an organic solvent, which, after dispersion in water is again removed from the dispersion. Example 1 describes getting in 62 weight.-interest acetone. When the synthesis of the above dispersions are used polyol as one of the components with a molecular weight of at least 350 g/mol with a share of prepolymer from 30 to 90%. Due to the high proportion of elastic segments described dispersion can not be used as a changeable components for high quality tools to cover as varnishes may not achieve sufficient hardness.

In German patent DE 3613492 describes the way of getting free from the co-solvent polyurethane-polyurea dispersions with acetone. Prepolymer, which in this case is not blocked, is made in 20-50 weight.-percent solution in volatile organic solvent, such as acetone, and the solvent after dispersion in water is removed by distillation.

Replacement of the N-MP in the method according to EP-A 0942023 for acetone in amounts from 50 to 62 wt.%, as in the German patent DE 19914885, leads to the polyisocyanate crosslinking blocked SLE, which, however, are not stable when stored.

The present invention is to provide a storable polyurethane dispersions with pyrazole-blocked isocyanate the mi groups similarly, they can be obtained according to the European application EP-A 0942023, which are still free from solvent or poor solvent and, in particular, must not contain N-MP or butylglycol. In addition, funds to cover derived from such dispersions, must have good optical properties of the films, high resistance to chemical reagents and hardness by pendulum device over 80 seconds.

It was found that the above problem can be solved using a special method of obtaining. The subject of the invention is a method of producing dispersions of blocked polyurethane prepolymers characterized in that

I) first gets blocked polyurethane prepolymer through interaction

a) 100 equivalent.%, at least one MDI

b) 50-90 equivalent.%, in the calculation of the isocyanate reactive groups, thermally tsepliaeva blocking means,

c) 5-45 equivalent.%, in the calculation of the isocyanate reactive groups, monohydroxybenzene acid as hydrophiloidea tools and

d) 0-25 equivalent.%, in the calculation of the isocyanate reactive groups, polyhydroxyalkanoic acid as hydrophiloidea tools and

e) from 0 to 15 equivalent.%, per isocyanate reactive is the group at least one per isocyanate reactive groups, di - or polyfunctional components extension chain with a molecular weight of 32 to 350 g/mol, and

i) it occurs with the use of (partially) miscible with water, inert to NCO-groups of organic solvents with boiling points below 120°C (at 1013 bar)

ii) and they are used in such quantities that the polyurethane prepolymer contained in the reaction solution, after full conversion is in the range from 70 to 98 wt.%,

II) obtained in stage (I) solution of polyurethane prepolymer dispersed in water, at the same time before, during or after dispersion, at least partially, is the deprotonation of carbonyl groups of the acid with a base, and then

III) in some cases, also in parallel during the dispersion contained organic solvent is completely removed by distillation.

The next subject of invention are dispersions obtained according to the claimed method.

Fully remote" in the usual communication means that after distillation in the obtained dispersion remains solvent is less than 5 mass percent, preferably less than 3 mass%, particularly preferably less than 1.5 mass percent.

Quantitative the e ratio of the reaction partners is selected preferably so that that the ratio of equivalents of isocyanate components (a) to the reactive towards isocyanate groups of component b), C), (d) and (e) is from 1:0.5 to 1:1,7, particularly preferably from 1:0.6 to 1:1.5, and entirely preferably from 1:0.7 to 1:1,3.

As suitable polyisocyanates are used in (a) well-known specialists JI-functional compounds with a functionality of preferably 2 or more. This is usually aliphatic, cycloaliphatic, analiticheskie and/or aromatic di - or triisocyanate, as well as their products of high subsequent transformations with the structures of iminoimidazolidine, isocyanurate, uretdione, urethane, allophanate, biureta, urea, oxidisation, obssolation, allodapini and/or carbodiimide, which contain two or more scatter JI-groups.

Examples of such di - or triisocyanate are tetramethyldisilane, cyclohexane-1,3 - and 1,4-diisocyanate, hexamethylenediisocyanate (HDI), 1-isocyanato-3,3,5-trimethyl-5-isocyanato-methyl-cyclohexane (isophorondiisocyanate, IPDI), methylene-bis-(4-isocyanatobenzene), tetramethylethylenediamine (TMXDI), triisocyanate, toluenediisocyanate (TDI), di-phenylmethane-2,4'- and/or 4,4'-diisocyanate (MDI), triphenylmethane-4,4'-diisocyanate, naftilan-1,5-diisocyanate, 4-isocyanatomethyl-1,8-octadienal (nonan-triisocyanate, triazol natinonal, TIN) and/or

1,6,11-undecatrien, and also any mixtures and in some cases also a mixture of other di-, tri - and/or polyisocyanates.

Such polyisocyanates are typical of the content of isocyanates from 0.5 to 50 wt.%, preferably from 3 to 30 wt.%, particularly preferably from 5 to 25 wt.%.

Preferably in the inventive method uses high-molecular compounds with isocyanurate-, urethane-, allophanate, biuret-, iminoctadine-, oxidization and/or uretdione groups based on aliphatic and/or cycloaliphatic diisocyanates.

Especially preferred in the present method uses high-molecular compounds with biuret, iminoctadine, isocyanurate and/or uretdione groups on the basis of hexamethylenediisocyanate, isophoronediisocyanate and/or 4,4'-diisocyanatohexane.

As a blocking agent components b) are used preferably 1H-pyrazoles such as pyrazole, 3-methylpyrazole or 3,5-dimethylpyrazole. Particularly preferably finds application 3,5-dimethylpyrazol, which is easily accessible, for example, by condensation of hydrazine hydrate is added with acetylacetone. Mixtures of these blocking agents and mixtures with other blocking agents, such as butanonoxime, acetoxy, N-tert-butyl-benzylamine and/or aminobutiramida the min, can also be used.

Suitable monohydroxybenzene acids components (C) are, for example, 2-hydroxyestra acid, 3-hydroxypropanoic acid, 12-hydroxy-9-octadecanoic acid (retinology acid), hydroxypivalic acid (2-hydroxy-methyl-2-methylpropionate acid or lactic acid. It is preferable hydroxypivalic acid.

Suitable polyhydroxyalkanoate acid components (a) are, for example, dihydroxycinnamate acid, such as dimethyllysine chilcote, 2,2-dimethylaniline acid, 2,2-dimethylamphetamine acid, dihydroxyethane acid, dimethylaniline acid or dimethylolpropionic acid. It is preferable dimethylolpropionic acid.

In addition to gidratirovana through at least one hydroxycarbonic acid, can be used more suitable nonionic compounds acting gidrofilnami way. Suitable nonionic hydrophilic compounds are, for example, polyoxyalkylene esters, which contain at least one hydroxy or amino group. They are available in a known manner by alkoxysilane suitable source of molecules.

Suitable source molecules are, for example, saturated monosperma (monohydroxy alcohols), t is such as methanol, ethanol, n-propanol, isopropanol, n-butanol, Isobutanol, sec-butanol, Isernia pentanol, hexanol, octanol and nonanol, n-decanol, n-dodecanol, n-tetradecanol, n-hexadecanol, n-octadecanol, cyclohexanol, the isomeric methylcyclohexanols or hydroxymethylcellulose, 3-ethyl-3-hydroxyethyloxy or tetrahydrofurfuryl alcohol, diethylenglycol-monoalkyl ether, such as diethylene glycol-monobutyl ether, unsaturated alcohols such as allyl alcohol, 1,1-dimethylallyl alcohol or oleic alcohol, aromatic alcohols such as phenol, the isomeric Cresols or methoxyphenols, analiticheskie alcohols such as benzyl alcohol, anise alcohol or cinnamic alcohol, secondary monoamines such as dimethylamine, diethylamine, dipropylamine, Diisopropylamine, dibutylamine, bis(2-ethylhexyl)-amine, N-methyl and N-ethyl-cyclohexylamine or dicyclohexylamine, and also heterocyclic secondary amines such as morpholine, pyrrolidine, piperidine or 1H-pyrazole. The preferred source molecules are saturated monosperma. Especially preferred as the source molecule is used monobutyl ether of diethylene glycol.

For the reaction of alkoxysilane appropriate acceleratedly, in particular, are ethylene oxide and propylene oxide, which can be used in any consistently the tee or in mixture with the reaction alkoxysilane. The preferred unit is the addition of ethylene oxide and of propylene oxide to the original.

In the case of polyalkylene-polyethers these are either pure polyethylene oxide-polyester or mixed polyalkylene-polyesters, acceleratedly whose units are, at least, up to 30 mol.%, preferably, at least 40 mol.% from ethylenoxide links. Preferred nonionic compounds are monofunctional mixed polyalkylene-polyesters, which contain at least 40 mol.% ethankoenig and maximum 60 mol.% propylenoxide links.

Content ethylenoxide links relative to the total content of solid substances of component a) to (e) lies below 5 wt.%, preferably below 3 wt.%, particularly preferably below 2 wt.%.

As component (e) of extension chain are considered, for example, di-, tri - and/or polyols. Examples are ethanediol, di-, tri-, tetraethylene glycol, 1,2 propandiol, di-, tri-, tetrapropylene, 1,3-propandiol, butanediol-1,4, butanediol-1,3, butanediol-2,3, pentanediol-1,5, hexanediol-1,6, 2,2-dimethyl-1,3-propandiol, 1,4-dihydrocyclopenta, 1,4-dimethylcyclohexane, octanediol-1,8, decanediol-1,10, dodecanediol-1,12, trimethylacetyl ether, trimethylolpropane, castor oil, glycerin and/or mixtures of the mentioned products, in some cases with each the mi di-, tri - and/or polyols. Ethoxylated and/or propoxycarbonyl di-, tri - and/or polyols, such as ethoxylated and/or propoxycarbonyl trimethylolpropane, glycerin and/or hexanediol-1,6, can also be used.

In addition, can be used di-, tri - and/or polyamine with primary and/or secondary amino groups. Examples are Ethylenediamine, 1,3-Propylenediamine, 1,6-hexamethylenediamine were, ISOPHORONEDIAMINE, 4,4'-diaminodicyclohexylmethane, Diethylenetriamine or hydrazine.

In addition, can also be used hydroxides, such as, for example, dihydroxydiphenyl acid.

It is also possible mixtures of amines and alcohols, and compounds with mixed functions with different reactive towards isocyanate groups, such as N-methylethanol - and N-methylisophthalic, 1-amino-propanol, diethanolamine, 1,2-dihydroxyethyl or 1-aminopropanol.

Preferred chain extenders are butanediol-1,4, butanediol-1,3, hexanediol-1,6 and/or trimethylolpropane. Extension chain components (e) have a molecular weight of preferably from 32 to 350 g/mol, particularly preferably from 62 to 200 g/mol.

To accelerate the reaction uretonimine to the reaction mixture can also be added catalysts. Suitable catalysts are, for example, tertiary amines, compounds of tin, zinc or bismuth or basic salts. Preferred are dibutylamino-dilaurate, dibutylamino-octoate.

As a (partially) miscible with water solvent components (i) are aliphatic ketones or aliphatic or cycloaliphatic ethers. Examples of such solvents are acetone, methyl ethyl ketone, tert-butyl methyl ether or tetrahydrofuran. Preferred are aliphatic ketones with 3-6 carbon atoms. Especially preferred is acetone.

The use of mixtures of the respective solvents is also possible.

The solvent is used in amount, so that the polyurethane polymer contained in the reaction solution is in the amount of from 70 to 98 wt.%, preferably from 80 to 95 wt.%.

The solvent may be added in portions or all at once. The addition can be made at each stage before dispersing. In a preferred embodiment, the solvent is added after part of the isocyanate groups will react, but more are available free isocyanate groups. Distillative the solvent is preferably in vacuum.

The advantage of this process lies in the reduced viscosity in the manufacture of prepolymer without the solvent was in large quantities in the dispersion.

Examples deproteinised means is, be used in (II)are basic compounds such as ammonia, triethylamine, N,N-dimethylaminoethanol, dimethylcyclohexylamine, triethanolamine, methyldiethanolamine, diisopropanolamine, ethyldiethanolamine, diisopropylethylamine, N-methylmorpholine, 2-amino-2-methyl-1-propanol or any of their mixtures. Preferred deprotoniruya means are 2-amino-2-methyl-1-propanol and tertiary amines such as triethylamine and N,N-dimethylethanolamine, especially preferred is N,N-dimethylethanolamine.

The number deproteinised funds in the General case is measured so that the degree of deprotonation of carboxylic groups present in the inventive polyurethane (molar ratio of amine used to present the acid groups)was at least 40%, preferably from 70 to 130%, particularly preferably from 90 to 110%. The deprotonation can occur at the same time before, during or after the stage of dispersion. Preferred still is the deprotonation before water.

For dispersion in water according to stage (II) solution of polyurethane prepolymer, if necessary, with a strong shift, for example such as strong mixing, will be included in the water dispersion or, on the contrary, the water dispersion is fed in lane is mesheanii to the solution prepolymer. Preferably, water is supplied in dissolved prepolymer.

After complete dispersion in phase III) the solvent is removed distillative. Preferably, the distillation takes place in vacuum at temperatures from 20 to 70°C., particularly preferably from 30 to 50°C. Vacuum is set preferably in the range from 50 to 500 mbar, particularly preferably in the range from 100 to 200 mbar. You can set the desired temperature and adjusts the necessary vacuum for distillation, or Vice versa. In the preferred form of the method is to first install a vacuum in the range from 100 to 200 mbar and then the dispersion is heated from room temperature to 40°C.

In a preferred form of execution of the proposed method loads the polyisocyanate (component (I) (a)) and the first partial quantity of SLE (blocking means according to component I) b)) is locked into the first reaction stage at temperatures of about 70°C., Preferably at a specified first stage reacts from 25 to 60 equalent.% isocyanate groups. Then right after another is added to the rest of reactive towards isocyanate groups of the components and the solvent and the mixture is heated under reflux until until isocyanate groups are no longer defined. In a preferred embodiment, the COI is the log of the acid groups are then completely or partially deprotonated with base then dispersed with water and then acetone is removed in vacuo.

According to the invention the dispersion have an average particle diameter (determined, for example, using LKS-measurements (by means of laser correlation spectroscopy), the measurement at 23°C after dilution of the sample is about 100 times the volume of deionized water, measuring instrument: Malvern Zetasizer 1000, Malvern Inst. Limited) from 5 to 300 nm, preferably from 10 to 150 nm. This applies at least to 90% of the particles, preferably at least 75%, particularly preferably at least 60%.

The solids content of the dispersions is preferably from 20 to 55 wt.%, particularly preferably from 25 to 45 wt.%.

Declare blocked polyisocyanate dispersions can be used, for example, to get the calcining means for coatings (furnace lacquers), for the application of protective layers on substrates, preferably of metals, minerals, glass, wood or plastic. For this purpose, the inventive coatings can be applied using smearing, squeegee, immersion, spraying, as, for example, spraying air pressure or spraying without air, as well as electrostatic coating, for example a cone-shaped deposition at high speed. The layer thickness of the dried film may be,for example, from 10 to 120 μm. Curing the dried film is due to the calcination in the temperature range from 90 to 190°C., preferably from 110 to 180°C., particularly preferably from 120 to 160°C.

The next subject of invention is therefore the use according to the invention dispersions of blocked polyurethane prepolymers to obtain funds for coatings, adhesives and sealants and elastomers.

Another object of the invention is means for coatings, adhesives and sealants, and elastomers produced using the inventive dispersions.

Another subject of the invention are substrates equipped with applied coatings obtained using the inventive means for coating.

To receive funds for coatings (furnace varnishes, adhesives and elastomers according izobreteniya polyisocyanate stitched dispersion with blocked isocyanate groups are mixed, at least bifunctionality, reactive towards isocyanate groups of compounds, for example, any polyol as one of the components, preferably in the form of aqueous dispersions.

Such polyol as one components can be polyhydroxy polyesters, polyhydroxyvalerate, polyhydroxy polyethers, polycarbonate-diols or polymers is you, containing hydroxyl groups, such as the famous polyhydroxy-polyacrylates, polyacrylate-polyurethane and/or polyurethane-polyacrylate. In General they have a hydroxyl number of from 20 to 200, preferably from 50 to 130 mg KOH/g Required usually hydrophilic modification of these polyhydroxylated compounds takes place by known methods, for example, as they are disclosed in European patents EP-A-0157291, EP-A-0498156 or EP-A-0427028.

Mix with other reactive alcohol compounds, such as, for example, aminecontaining stitched resins, such as melamine resins and/or urea resin, it is also possible for additional crosslinking during firing.

Getting varnishes, paints, adhesives and other compounds of the claimed dispersions takes place by known methods. In addition to the blocked polyisocyanates and polyols for the compositions can be added conventional additives and other excipients (e.g., pigments, fillers, means for improving the fluidity, antispyware, catalysts).

Examples

Chemicals

Desmodur®N 3300:

Isocyanurate on the basis of hexamethylenediisocyanate, Bayer MaterialScience AG, Leverkusen, DE

Desmodur®W:

4,4'-Diisocyanatohexane, Bayer MaterialScience AG, Leverkusen, DE

Bayhydrol®D 270

Aqueous polyester dispersion containing hydro is a strong group, Bayer MaterialScience AG, Leverkusen, DE

Additol XW 395

(Auxiliary means for fluidity) / non, UCB Chemical, Louis, USA

Surfynol 104

(Auxiliary means for fluidity) / non, Air Products, Hattingen, DE

Hydroxypivalic acid

Perstorp Specialty Chemicals AB, Perstorp, Sweden

Other chemical reagents were taken in the form of commercial reagents (Sigma-Aldrich Chemie GmbH, Taufkirchen, DE).

Because otherwise indicated, all percentage data refer to mass percent.

Because otherwise specified, all analytical measurements are temperature 23°C.

Reduced viscosities were determined using a rotational viscosity according to DIN 53019 at 23°C with a rotary viscometer of the company Anton Paar Germany GmbH, Ostfildern, DE.

The content of NCO-groups was determined if not mentioned clearly different, space-analytically according to DIN-EN ISO 11909.

These particle sizes were determined by laser correlation spectroscopy (instrument: Malvern Zetasizer 1000, Malvern Instr. Limited).

The solids contents were determined by heating a weighed sample at 120°C. At constant weight when you weigh the samples was calculated solids content.

Control over free PSO-groups was performed using IR-spectroscopy (band at 2260 cm-1).

As a test for persistence were collected in 250 ml of dispersion and kept the AC is at room temperature, and at 40°C. Corresponding to each occasion time persistence indicated in the individual examples. As the value of stability was calculated height of the sediment at the bottom in the vessel with the surface area of the bottom 25 cm2. Above a height of 0.5 mm dispersion was evaluated as unstable.

1) Example comparison 1: stitched dispersion, affirm, receive analogously to example 1 in EP-A-0942023, but still without N-MP, without co-solvent

In a standard apparatus with stirring, were placed 200 g (1 EQ.) Desmodur N 3300 and heated under nitrogen to 50°C. Then to the melt was added to a partial amount of 3,5-dimethylpyrazole (SLE) (48,0 g; 0.5 EQ.) portions over 30 minutes. Was stirred at 70-80°C until the isocyanate content reached about 8.5%.

To the melt was added 29.0 g (0.25 EQ.) hydroxypivalic acid and was stirred at 65°C until the isocyanate content reached 3.8 per cent.

Then he added 24,0 g (0.25 EQ.) SLE and mixed at 65°C until using IR spectroscopy did not detect more isocyanate groups. Thus prepolymer became very viscous and partially wrapped around the agitator.

Then added 22,2 g (0.25 EQ.) N,N-dimethyl-ethanolamine, was stirred for another 10 minutes and with vigorous stirring was added 451,4 g heated to 70°C. deionized water.

The resulting dispersion had the following properties is:

The solids content of:approximately 38%
PH value:about 8.4
Viscosity:about 400 MPa
The average particle size (LKS):74 nm

Test for persistence: a strong precipitate formed at the bottom when stored at 40°C over a few days and two weeks at room temperature. The dispersion was unstable during storage. In addition, the ability to manufacture due to the high viscosity of prepolymer problematic.

2) Example of comparison 2: stitched dispersion, affirm, receive analogously to example 1 in EP-A-0942023, but still without N-MP, in the way with acetone (50%solution of prepolymer in acetone)

In a standard apparatus with stirring, were placed 200 g (1 EQ.) Desmodur N 3300 and heated under nitrogen to 50°C. Then to the melt was added to a partial amount of 3,5-dimethylpyrazole (SLE) (48,0 g; 0.5 EQ.) portions over 30 minutes. Was stirred at 70-80°C until the isocyanate content reached about 8.5%.

To the melt was added 29.0 g (0.25 EQ.) hydroxypivalic acid and 302 g of acetone and the mixture was stirred at 50-65°C. as long as the content of isoci the more groups were not as high as 1.8%.

Then he added 24,0 g (0.25 EQ.) SLE and mixed further until, while using IR spectroscopy did not detect more isocyanate groups.

Then added 22,2 g (0.25 EQ.) N,N-dimethyl-ethanolamine, was stirred for another 10 minutes and with vigorous stirring was added 451,4 g heated to 50°C. deionized water.

Removal of acetone were stripped in vacuo (120 mbar) at about 40°C. After that, there were no dispersion, and formed a large amount of white sediment at the bottom.

3) Example comparison 3: stitched variance similarly to comparative example 2, but still with a high content of solids in prepolymer

The process was conducted as described in comparative example 2, but instead of 50%solutions of prepolymer in acetone work conducted with 62%solution.

In this case, also did not form a stable dispersion.

4) Example 1: link the dispersion according to the invention, the receiving analogously to example 1 in EP-A-0942023, but still without M-MP, receive with a small amount of acetone (95%solution of prepolymer in acetone)

The process was conducted as described in comparative example 1, but still with hydroxypivalic acid was added 16 g of acetone. After adding deionized water acetone drove in vacuum (120 mbar) at about 40°C.

Received IU the Kai (thin) dispersion had the following properties:

The solids content of:approximately 39%
PH value:about 8.4
Viscosity:approximately 9600 MPa
The average particle size (LKS):36 nm

Test for persistence: at least 3 months stable at room temperature and at 40°C.

5) Example 2: link the dispersion according to the invention, the receiving analogously to example 1 (85%solution of prepolymer in acetone)

The process was conducted as described in comparative example 1, but still with hydroxypivalic acid was added 45 g of acetone. After adding deionized water acetone drove in vacuum (120 mbar) at about 40°C.

Received small (thin) dispersion had the following properties:

The solids content of:approximately 39%
PH value:about 8.7
Viscosity:about 1300 MPa
The average particle size (LKS): 38 nm

Test for persistence: stable at least 3 months at room temperature and at 40°C.

6) Example 3: link the dispersion according to the invention, the receiving analogously to example 1 (70%solution of prepolymer in acetone)

The process was conducted as described in comparative example 1, but still with hydroxypivalic acid was added 129 g of acetone. After adding deionized water acetone drove in vacuum (120 mbar) at about 40°C.

Received small (thin) dispersion had the following properties:

The solids content of:approximately 38%
PH value:approximately 8,9
Viscosity:about 165 MPa
The average particle size (LKS):22 nm

Test for persistence: stable at least 3 months at room temperature and at 40°C.

7) Example 4: stitched dispersion according to the invention, the elongation of the chain due to the diol components, obtaining with a small amount of acetone (90%solution of prepolymer in acetone)

In a standard apparatus with stirring placed 429 g (2.2 EQ.) Desmodur N 3300 and ravali under nitrogen to 70°C. Then the melt was added to a partial number of SLE (76.9 g; 0.8 EQ.) portions over 30 minutes. Was stirred at 70°C until theoretical isocyanate content reached from 11,62% or below.

To melt directly one after another was added 63 g of acetone; and 11.8 g (0.2 EQ.)

1.6 hexanediol; to 47.2 g (0.4 EQ.) hydroxypivalic acid and even 57,7 g (0.6 EQ.) DMP. Then stirred under reflux until then, while using IR spectroscopy did not detect more isocyanate groups. After that was added is 39.2 g (of 0.44 EQ.) N,N-dimethyl-ethanolamine, was stirred for another 10 minutes and with vigorous stirring was added 976,6 g heated to 50°C. deionized water.

Then acetone drove in vacuum (120 mbar) at about 40°C. and the dispersion was stirred another 3 hours at this temperature.

Received small (thin) dispersion had the following properties:

The solids content of:approximately 37%
PH value:about 8.7
Viscosity:about 1000 MPa
Average particle size:14 nm

Test for persistence: stable at least 3 months at room temperature and at 40°C.

8) Example 5: stitched dispersion according to the invention, the elongation of the chain due to trilinos components, obtaining with a small amount of acetone (90%solution of prepolymer in acetone)

The process was performed as described in example 4, but instead of hexandiol the appropriate number of groups were added at the expense of trimethylolpropane.

Thin dispersion had the following properties:

The solids content of:approximately 37%
PH value:approximately 8,9
Viscosity:about 3000 MPa
Average particle size:14 nm

Test for persistence: stable at least 3 months at room temperature and at 40°C.

9) Example 6: link of the dispersion according to the invention, the elongation of the chain due to trilinos components as in example 5, but still a mixture of different polyisocyanates

The process was performed as described in example 5, but instead of Desmodur N 3300) was added a mixture of 174,0 g of Desmodur N 3300 and 26 g of Desmodur W.

Thin dispersion had the following properties:

approximately 37%
PH value:approximately 9,0
Viscosity:about 950 MPa
Average particle size:20 nm

Test for persistence: stable at least 3 months at room temperature and at 40°C.

10) Example 7: wetting dispersion according to the invention, mixed gidratirovana of hydroxypivalic acid and dimethylolpropionic acid, receive with a small amount of acetone (90%solution of prepolymer in acetone)

The process was performed as described in example 5, but still hexanediol was replaced with a corresponding number of groups dimethylolpropionic acid (13,4 g) and the share hydroxypivalic acid was reduced by 25%.

Thin dispersion had the following properties:

The solids content of:approximately 37%
PH value:approximately 8,9
Viscosity:about 3500 MPa
Average particle size:13 nm

Test n is persistence: stable, at least 3 months at room temperature and at 40°C.

td align="justify"> Diest. water
Test technical use
(Amounts in grams) Obtaining a varnish compositions, firing and checking the transparency of the varnish
VarianceExampleExampleExample*
467
The amount of dispersion68,670,065,766,8
Bayhydrol ® D 27050,050,050,050,0
Additol XW 3951,11,11,11,1
Surfynol 1041,11,11,11,1
to 66.358,057,069,0
The solid content34,634,134,131,9
substances in nail Polish [%]
Time leakage37413739
lacquer composition [I][3]
10'RT10'RT10'RT10'RT
Conditions roasting++++
20'140°C20'140°C20'140°C20'140°C
The interplay between the film goodgoodgoodgood
(scan layer)
Hardness9512713970
pendulum device
[with][2]
Solubility[1]2/2/3/42/2/3/42/2/3/42/3/4/4
* Bayhydrol ® VP LS 2310, conventional commercial aqueous dispersion MDI blocked by butanonoxime, the solids content of 38%, Bayer MaterialScience AG, Leverkusen, DE.
[1]1 minute, the sequence of solvents: xylene/methoxypropylacetate/ethyl acetate/acetone; rating: 0 - very good 5 - very bad.
The us is ascioti chemical reagents in the case described solvents requires 4 or less.
[2]Measurement of hardness by pendulum device occurs according to the method of Koenig respectively DIN 53157. Hardness by pendulum device requires at least 80 seconds.
[3]Time leakage was measured in the glass to determine the fluidity of plastics in accordance with DIN 53157.

Conducting a similar test with the comparative examples was impossible, as they are already in the beginning of the test there were significant sediment at the bottom. The residue is prevented reliable technical review of varnish with the technical test.

It is shown that the inventive polyisocyanate dispersions are stable during storage and that the claimed burnt funds for coatings fulfill criteria for optical properties of varnishes, resistance to chemical reagents and hardness by pendulum device.

The varnish from the stitching dispersion Bayhydrol ® VP LS 2310 had against the varnishes of the claimed links various shortcomings (low solids content of the lacquer composition at a comparable time, leak, lower resistance to chemical reagents, the lower the hardness of the varnish).

1. The method of producing dispersions of blocked polyurethane prepolymers characterized in that
I) first get blocked polyurethane prepolymer by interaction
a) 100 equivalent.-%, at measures which, one MDI,
with
b) 50-90 equivalent.-%, per isocyanate reactive group, thermally tsepliaeva blocking means,
c) 5-45 equivalent.-%, per isocyanate reactive group monohydroxybenzene acid as hydrophiloidea tools and
d) 0-25 equivalent.-%, per isocyanate reactive group polyhydroxyalkanoic acid as hydrophiloidea tools and
e) 0-15 equivalent.-%, per isocyanate reactive group, at least one per isocyanate reactive group, a di - or polyfunctional components of the extender chain with a molecular weight of 32 to 350 g/mol, and
i) it occurs with the use of (partially) miscible with water, inert to NCO-groups, organic solvents with boiling points below 120°C (at 1013 mbar),
ii) and they are used in such quantities that the polyurethane prepolymer contained in the reaction solution, after full conversion is in the range from 70 to 98 wt.%,
II) obtained in stage (I) solution of polyurethane prepolymer is dispersed in water, at the same time before, during or after dispersion, at least partially, is the deprotonation of the carboxylic groups of the acid with a base, and then
III) if necessary the awns are also in parallel during the dispersion contained organic solvent is completely removed by distillation.

2. The method of producing dispersions of blocked polyurethane prepolymers according to claim 1, characterized in that component (I) (a) are polyisocyanates based hexamethylenediisocyanate, isophoronediisocyanate and/or 4,4'-diisocyanatohexane.

3. The method of producing dispersions of blocked polyurethane prepolymers according to claim 1, characterized in that component I) b) as a blocking means using 1H-pyrazoles.

4. The method of producing dispersions of blocked polyurethane prepolymers according to claim 1, characterized in that component (I) (C) as hydrophiloidea tools use hydroxypivalic acid.

5. The method of producing dispersions of blocked polyurethane prepolymers according to claim 1, characterized in that component (I) (d) as hydrophiloidea tools use dimethylolpropionic acid.

6. The method of producing dispersions of blocked polyurethane prepolymers according to claim 1, characterized in that component (I) (e) as a lengthening chain components use butanediol-1,4, butanediol-1,3, hexanediol-1,6 and/or trimethylolpropane.

7. The method of producing dispersions of blocked polyurethane prepolymers according to claim 1, characterized in that component (I) (i) as (partially) miscible with water solvents use of aliphatic ketones with 3-6 carbon atoms.

<> 8. The method of producing dispersions of blocked polyurethane prepolymers according to claim 1, characterized in that in stage (II) as deproteinised means using 2-amino-2-methyl-1-propanol, triethylamine and/or N,N-dimethylethanolamine.

9. The method of producing dispersions of blocked polyurethane prepolymers according to claim 1, characterized in that in stage (III) the solvent of (I) (i) removed from the dispersion to content less than 3 wt.%.

10. The method of producing dispersions of blocked polyurethane prepolymers according to one of claims 1 to 9, characterized in that the ratio of equivalents of isocyanate components I) (a) reactive with respect to isocyanate groups of component I) b), C), (d) and (e) is from 1:0.5 to 1:1,7.

11. The use of dispersions of blocked polyurethane prepolymers obtained according to one of claims 1 to 10, for the production of coatings, adhesives and sealants and elastomers.

12. Means for coatings, adhesives and sealants and elastomers produced using the dispersions of blocked polyurethane prepolymers obtained according to one of claims 1 to 10.

13. The substrates provided with means for coatings produced using the dispersions of blocked polyurethane prepolymers obtained according to one of claims 1 to 10.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: adhesive composition contains perchlorovinyl resin and an organic solvent. The composition contains dichloroethane as an organic solvent, as well as dibutyl phthalate and a modifier in form of epoxy diane resin ED-20 and N-nitrosodiphenylamine, with the following ratio of components in pts.wt: perchlorovinyl resin 20, organic solvent 80.0, dibutyl phthalate 1.0, epoxy diane resin ED-20 10.0-15.0, N-nitrosodiphenylamine 0.33-1.11.

EFFECT: invention increases strength when gluing together vulcanised rubber.

2 tbl

FIELD: chemistry.

SUBSTANCE: adhesive composition contains polychloroprene rubber nairit DP, butyl phenol formaldehyde resin 101 K, water, zinc oxide, magnesium oxide and an organic solvent which is a mixture of ethyl acetate and nefras. The composition additionally contains a modifier obtained first as a result of room temperature-reaction of an aliphatic amine - triethanolamine or polyethylene polyamine and silica filler Rosil R-175, with the following ratio of components, wt %: polychloroprene rubber nairit DP - 90.0, butyl phenol formaldehyde resin 101K - 90.0, water - 3.0, zinc oxide - 5.0, magnesium oxide - 11.0, organic solvent - 800.0, aliphatic amine - 0.1-0.2, silica filler Rosil R-175 - 10.0.

EFFECT: invention increases strength when gluing together vulcanised rubber.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to compositions based on silane-functional polymers, which are suitable for adhesive binding, sealing and coating porous substrates. The composition contains at least one silane-functional polymer, at least one organosilane and at least one organotitanate. The silane-functional polymer is a silane-functional polyurethane polymer or can be obtained through hydrosilylation of polymers, having terminal double bonds. The organosilane contains at least one sulphur atom. The organotitanate has ligands bound to a titanium atom through an oxygen-titanium bond. The ligands are selected from a group consisting of an alkoxy group, a sulphate group, a carboxylate group, a dialkylphosphate group and an acetylacetonate group. Content of the organotitanate in the composition is between 0.1 and 10 wt %. Content of the organosilane in the composition is between 0.1 and 7 wt %. The composition also contains at least one filler, content of which is between 10 and 70 wt %. The composition is used for binding, sealing and coating substrates made from concrete, mortar, brick, tiles, plaster, natural stone such as granite or marble, glass, glass-ceramic, metal or metal alloy, wood, plastic and lacquer.

EFFECT: obtained article, which is bound, sealed or coated using the composition, is a building structure, more specifically a building or civil construction structure; the composition guarantees efficient adhesion to a substrate even after storage in the presence of water.

17 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: foamed material consists of a single-component, moisture-curable composition containing at least one polymer P, having isocyanate groups and/or alkoxy silane groups, 10-60 vol. % of at least one gas and 10-30 wt % soot per total weight of the single-component foamed material which is curable in a moist medium. Application of the obtained foamed material is carried out primarily at temperature in the range of 10-40°C. The degree of foaming of the composition and, consequently, gas content of the single-component, moisture-curable foamed material varies during its application.

EFFECT: obtaining single-component, moisture-curable foamed material which can be used as an adhesive or a sealant/packing material for producing coatings or filling hollow structures with foamed material, particularly vehicles.

20 cl, 4 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a single-component primer composition for substrates made from glass and/or plastic, having setting time of at least 1 month. Said composition includes: a base primer composition including (a) an isocyanate functional prepolymer derived from the reaction of an aliphatic polyisocyanate and a polyol, and which is partially reacted with an amino group of a secondary aminosilane, wherein the aminosilane includes two or three methoxy groups bound to a silicon atom, two or three ethoxy groups bound to a silicon atom, or a combination thereof; (b) an isocyanate functional prepolymer with an isocyanate content greater than 1%, which is the reaction product of an aromatic polyisocyanate and a polyol of Mn>300; and (c) at least one solvent for the components (a) and (b); and an ingredient including an oxazolidine ring or derivative thereof; a second adduct (i) of an aromatic polyisocyanate and (ii) mercaptosilane, aminosilane or both; a film-forming polymer. The invention also describes glued structure having a glass or plastic panel, containing the said composition, a method of gluing the glass panel to the frame of a vehicle, comprising a step for applying said composition and a glued structure made using said method.

EFFECT: obtaining primer with long setting time, which exhibits excellent stability during storage, during application of which the surface does not swell.

13 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: disclosed is an aqueous polyurethane dispersion which does not contain N-methylpyrrolidone and solvents and contains a product of reaction of a mixture of 1-isocyanate-3,3,5-trimethyl-5-isocyanatemethylcyclohexane and 4,4'-diisocyanatedicyclohexylmethane, one or more polyols with average molecular weight of 500-3000, one or more compounds with at least one OH- or NH- functional group, which contain a carboxyl and/or carboxylate group, where at least 50 mol % acid incorporated in the overall resin consists of dimethylol propionic acid, one or more polyols and/or polyamines with average molecular weight less than 500 and, if necessary, one or more monoalcohols and/or monoamines, as well as preparation method thereof and use thereof as an agent for coatings having good resistance characteristics.

EFFECT: obtaining a polyurethane dispersion which does not contain N-methylpyrrolidone and solvents, and contains a hydrophilization agent in form of dimethylol propionic acid, which can be stored for over 8 weeks and is suitable for making transparent shining coatings with high resistance to dyes.

8 cl, 2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a moisture-curable composition for adhesive compounds, sealing compounds, coatings or linings, application thereof as an adhesive, sealing compound or coating, a cured composition obtained by reacting water with such a composition, methods of gluing bases and sealing using said composition, as well as adhesive and sealed articles made using said methods, respectively. The moisture-curable composition contains (i) at least one isocyanate-containing polyurethane polymer P, which is obtained from at least one polyisocyanate and at least one polyol, and (ii) at least one aldimine-containing compound of formula (I): .

EFFECT: preparation of compounds which are stable during storage, can be quickly moisture-cured without bubbles, do not cause smells during curing and are suitable for use as precursors of synthetic materials.

25 cl, 34 ex, 10 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a moisture-hardening composition for polyurethane hot-melt adhesives, use thereof as hot-melt adhesive, to a hardened composition obtained from reaction of moisture with said composition, a method of gluing bases using said composition and an adhesive article made using said method, as well as a method of reducing content of monomeric diisocyanates in polyurethane polymers. The moisture hardening composition contains (a) at least one polyurethane polymer of formula (I) which is solid at room temperature, containing aldimine groups; (I) and (b) at least one polyurethane polymer P containing isocyanate groups.

EFFECT: preparation of polyurethane compositions used as hot-melt adhesive, containing reactive isocyanate groups which can be obtained using a simple method from polyols and technically accessible monomeric diisocyanates, and which have low content of monomeric diisocyanates, stable during storage, can be easily processed and are distinguished by fast cross-linking.

23 cl, 16 ex, 4 tbl

FIELD: chemistry.

SUBSTANCE: aqueous polyurethane dispersion composition contains polyurethane with carbodiimide and/or carboxyl groups, and polyurethane dispersion adhesive which contains polyurethane with carbodiimide and/or carboxyl groups. The polyurethanes are polyester-polyurethane elastomers. The aqueous polyurethane dispersion composition and polyurethane dispersion adhesive also contain at least one carbodiimide which contains at least one carbodiimide group. The aqueous polyurethane dispersion composition and polyurethane dispersion adhesive react with each other through a polyaddition reaction when heated to 50°C or higher. A polymeric film having an undercoating is obtained by depositing and drying the single-component aqueous polyurethane dispersion composition on a polymeric film. A composite is obtained by reacting the polymeric film having an undercoating with a substrate on which polyurethane dispersion adhesive is deposited and dried. The composite can be produced industrially and can be especially used in interior finishing, preferably of a component built into a transportation vehicle or can be used in the furniture industry.

EFFECT: high reliability of the composition.

5 cl, 3 tbl

FIELD: construction.

SUBSTANCE: composition contains the following components, wt %: 74.42-83.63 - hydroxyl-containing polybutadiene rubber SKD-GTRA, 1.63-2.11 - 1.4-butanediol, 0.07-0.09 - trimethylolpropane, 4.76-13.04 - transformer oil, 8.90-11.53 - hexamethylenediisocyanate, 0.5-5.0 - technical carbon (over 100%), 0.02-0.03 - dibutyldilaurate of tin (over 100%).

EFFECT: reduced viscosity of strengthening polyurethane composition, its increased pot life, provision of technological process, higher hydrolytic and chemical resistance, provision of hardening temperature within the limits and high physical-mechanical properties.

4 ex, 1 tbl

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

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: 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

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