Water-based polyurethane coatings

FIELD: chemistry.

SUBSTANCE: present invention relates to versions of a water-based coating composition which is suitable for use particularly in the aerospace field. The water-based coating composition contains: (a) an essentially anhydrous basic component containing at least one hydrophilic polyol resin and at least one hydrophobic polyol resin, (b) an activating component containing at least one hydrophobic polyisocyanate and (c) water, wherein said composition contains 1-3 wt % of an organic solvent of the total weight of the water-based coating composition and component (a), (b) and (c) are mixed shortly before applying the water-based coating composition. In one version of the composition, the hydrophilic polyol resin can be selected from a group consisting of polyesters, polyethers, polyurethanes, caprolactones, alkyde resins and combinations thereof. Described also is a coating made using the polyurethane compositions disclosed herein.

EFFECT: obtaining water-based coating compositions which are stable during storage and have significantly low content of volatile organic compounds, coatings from which have improved technical characteristics such as impact resistance, specular gloss and longevity.

15 cl, 17 tbl, 7 ex

 

The present invention is made with government support under contract number FA8650-05-C-5010, by order of the air force of the United States. The United States government may have certain rights in the present invention.

The technical field to which the invention relates.

The invention relates to polyurethane compositions for coating water-based. More specifically, the invention relates to polyurethane compositions for coating water-based with low content of volatile organic compounds suitable for use, in particular, in the aerospace field.

The level of technology

On various products, such as aviation and aerospace, aircraft, often applied coating in order to give them properties such as solvent resistance, resistance to fuels and hydraulic fluids, resistance to weathering, abrasion resistance, hardness and/or aesthetics. For this purpose, use a polyurethane coating, which usually include activators, basic components and diluents. The activator typically is an organic polyisocyanate, the basic component is a hydroxyl-containing polymer resin and diluent - solvent mixture. To achieve high performance characteristics that are required, for example, the R, in aerospace applications use large amounts of solvent, in order to find a compromise between the film properties and appearance and aesthetics. However, when using such large quantities of the solvent having a large amount of volatile organic compounds (VOCS), i.e. according to the calculation made by the Agency for environmental protection, in a typical composition on the basis of their solvent contains about 420 g/l On environmental and economic reasons, but also to meet the ever-changing government standards require a reduction in the number of LOS that are used in these compositions. In this regard, efforts are being made towards the replacement of organic solvents in the compositions of polyurethane coatings, solvent-based to water.

To reduce the number of LOS in polyurethane coatings have been developed polyurethane coatings, water-based. However, so far polyurethane coatings, water-based have not been able to demonstrate a high technical characteristics, possessed by the coating solvent-based. Characteristics of polyurethane water-based coatings suffer because used in coatings polyol as one resin water-based before its connection with the activator is stored in the form of an aqueous dispersion. Polio the other resin water-based is often a low molecular weight and a lot of ester groups, which over time makes the resin is prone to hydrolysis. Hydrolysis reduces the overall molecular weight of the resin, which leads to products with a lower molecular weight, having poor impact resistance, durability, gloss, etc. in Addition, the rate of hydrolysis is difficult to control in different conditions, such as batch number, pH and storage time, resulting in significant variations in the characteristics of the film.

In addition, polyurethane coatings, water-based is often prepared using wysokosciowe mixing polyol as one resin water-based hydrophilic isocyanate. For a thorough mixing of the hydrophilic isocyanate with a polyol as one resin requires a high energy shift. In order to overcome the barrier between the colloid polyol as one of the resin and isocyanate using high-energy shift, in order to facilitate the migration of isocyanate to polyol as one micelle resin. Within the new micelles is the curing reaction with the formation of the polyurethane coating composition is water-based. However, for wysokosciowe mixing such apparatus is used as a mixing solvent and inkjet dispersant spray guns, for which thorough mixing of the isocyanate with the polyol as one components require high pressure and high energy shift. T the Kai instrument in many applications is not available. For example, such apparatus is not available for urgent repairs in the field, for example, automobiles, and aircraft and aerospace aircraft.

Finally, polyol as one of the components of traditional polyurethane water-based coatings include dispersion polyols in water. As noted above, such dispersions give unstable polyol as one of the components, because the polyols can be either hydrolyzed to small molecules. When this dispersion polyols in water requires wysokosciowe mixing. In addition, polyol as one of the components often contain pigments and other additives such as aluminum powder, which is unstable in aqueous phase under conditions of storage. These pigments and additives can interact with water, limiting the development of coatings water-based and adversely affecting characteristics of the coating.

Disclosure of inventions

The present invention provides polyurethane compositions for coating water-based, containing in one of the embodiments essentially anhydrous base component, activator and water. Essentially anhydrous base component includes a polyol as one of the resin and the activator comprises isocyanate. The combination of isocyanate and polyol as one hydrophilic components only to the extent that is sufficient for their disperser the cation in the aqueous phase and the formation of stable dispersion required for resistance to water. If the components are too hydrophilic, the water resistance of the cured coating will be too high and will not be suitable for use in high-quality coatings.

Essentially anhydrous base component includes at least one hydrophilic polyol as one resin, which can be any hydrophilic polyol as one resin. Not limiting of the invention, examples include hydrophilic complex polyester-polyols, hydrophilic simple polyester-polyols, hydrophilic polyurethane-polyols, hydrophilic alkyd polyols, hydrophilic caprolacton-polyols and hydrophilic acrylic polyols. According to another variant implementation of essentially anhydrous base component comprises a mixture of hydrophobic and hydrophilic polyol as one of the resins. In this embodiment, the hydrophilic polyol as one resin may be contained in the base component in an amount of at least about 10 wt.%.

The activator may be any suitable isocyanate. For example, in one of the embodiments the activator comprises at least one hydrophobic isocyanate component. In another embodiment, the activator comprises a mixture of hydrophobic and hydrophilic isocyanate component. In the case of hydrophobic and hydrophilic isocyanate component is in a hydrophobic isocyanate component is present in amount of at least about 30 wt.%.

The coating composition of the present invention in some embodiments dates represent a three-component system, in which essentially anhydrous base component, activator and water are stored separately and combined only shortly before use. As polyol as one basic component is stored in a substantially anhydrous environment, polyol as one of the resins is not hydrolyzed, which prolongs their shelf life and improves the quality of the coating. To create such compositions coatings polyol as one basic component is first mixed with the activating component. After thorough mixing the base component with an activating component, water is added to facilitate the reaction of the two components. Thorough mixing of the base component with the activating component improves the drying and film formation, and also imparts technical characteristics comparable with the characteristics of the polyurethane compositions for coatings, solvent-based.

Although the water dilutes the composition, its main goal is the dispersion polyols base component and isocyanate activator to facilitate the reaction of these components. After mixing the base component, isocyanate and water can be added diluting agent with the aim of finishing the viscosity of the coating for easier application. the Tim additional diluting agent can be any solvent or additional amount of water, although in the case of using the solvent, it is desirable to use it only in such quantity that provides a low VOC content in the composition for coating, i.e. below about 100 g/l in one of the embodiments, below about 70 g/l, in another embodiment below about 50 g/l, in yet another embodiment. To further minimize the amount of VOC in the coating composition, as a diluting agent, you can use the water.

Compositions for coating water-based according to some variants of implementation of the present invention have the technical characteristics, which are much higher than the existing characteristics of the compositions are water-based and compatible with the characteristics of their counterparts based solvents. In addition, compositions for coating water-based inventions greatly reduced VOC and can be done manually, which eliminates the need for wysokosciowe mixture.

The implementation of the invention

The proposed polyurethane compositions for coating water-based, suitable, for example, in aviation, aerospace, automotive, industrial and architectural applications. Compositions containing small amounts of VOCS and have the technical characteristics, comparable with the characteristics of the polyurethane is o compositions for coatings, solvent-based. In one embodiment, the implementation of the polyurethane composition for coating water-based is a three-component system consisting of essentially anhydrous base component, activator and water. Essentially anhydrous base component includes a polyol as one resin (resin), and an activating component comprises isocyanate(s). In one embodiment, the implementation of the polyol as one resin(s) is essentially anhydrous, however, in one alternative implementation of the polyol as one resin(s) is completely waterless. Used in the application, the expression "essentially anhydrous" means that the ingredients in the base component is not dispersed in water. The expression "three-component system known in the art and refers to dividing the base component and activator before applying. Three component mixtures connect only shortly before application.

Essentially anhydrous base component coating includes at least one hydrophilic polyol as one pitch. However, in one alternative implementation of essentially anhydrous base component comprises a mixture of hydrophilic polyol as one resin or hydrophilic resins and polyol as one hydrophobic polyol as one of the resins. In that case, when essentially anhydrous base component includes a mixture of hydrophilic and hydrophobic p is lyalinih resins, hydrophilic polyol as one resin may be contained in the base component in an amount of at least about 10 wt.% the total weight of the base component. For example, in one embodiment, the implementation of the polyol as one resin is contained in an amount of from about 10 to 80 wt.% the total weight of the base component, and a hydrophobic polyol as one resin is contained in an amount of from about 20 to 90 wt.% the total weight of the basic component.

In one embodiment, the implementation of the hydrophilic polyol has a hydrophilic group capable of imparting the polyol dispersibility in water. Such hydrophilic polyols are well known in the art, and the hydrophilic groups can be ionic dispersing in water groups or non-ionic dispersing in water groups. Ionic dispersing in water groups can be anionic groups, nonionic groups, or a combination of anionic and non-ionic groups. In some cases, may also be used and cationic groups. Not limiting of the invention, examples of suitable anionic dispersing in water groups include carboxyl group, phosphonic group, sulfonylurea group, and combinations thereof. Not limiting of the invention, examples of suitable non-ionic dispersing in water groups include polyalkylbenzene group, for example polietilenoksidnoy group. One of the typical vodorastvorimym is resin, having carboxyl groups, but these groups must be neutralized with the formation of salts of alkaline metal, making these resins are soluble in water. In the case of using a combination of anionic dispersing in water groups and non-ionic dispersing in water groups neutralization may not be necessary. Polyol as one resin has a sufficient concentration associated hydrophilic dispersing in water groups in order to give the oligomer ability to dispergirujutsja in the water. However, in order to prevent unwanted sensitivity to water of the final product coating, the concentration of dispersant in the water groups should be kept below the level at which the oligomer would have unacceptably high solubility in water.

Hydrophilic polyol as one resin may be any suitable hydrophilic resin containing hydroxyl group and carboxyl group. Not limiting of the invention, examples of suitable hydrophilic polyol as one of the resins include polyesters, polyethers, Alcide, polyurethanes, caprolactone and acrylic polyols. In some embodiments, the implementation of the hydrophilic polyol as one resin has a hydroxyl number in the range from about 20 to 120 mg KOH per 1 g of the sample, for example from about 30 to 100 mg KOH per 1 g of the sample. In some embodiments, implementing the Tulane hydrophilic polyol as one resin has an acid number in the range from about 10 to 90 mg KOH per 1 g of the sample, for example, from about 20 to 80 mg KOH per 1 g of the sample or, in some cases, from about 30 to 70 mg KOH/g

In some embodiments, the implementation of the hydrophilic polyol obtained using the two-stage method comprising preparing a first hydroxyl-containing polyol having a hydroxyl number in the range from about 50 to 300 mg KOH per 1 g of the sample, for example from about 100 to 250 mg KOH per 1 g of the sample. This hydrophilic hydroxyl-containing polyol has also, in some embodiments, implementation, acid number below about 5 mg KOH per 1 g of the sample. Hydrophilic hydroxyl-containing polyol is introduced into reaction with the anhydride, resulting in getting the desired hydrophilic polyol with a hydroxyl number from about 20 to 120 mg KOH per 1 g of sample and acid number from about 10 to 90 mg KOH per 1 g of the sample. The anhydride is used in a quantity sufficient to obtain a polyol having the desired acid number. Can be used any anhydride, which is usually used for such reactions. Not limiting of the invention, examples of suitable anhydrides include hexahydrophthalic anhydride, trimellitic anhydride, tetrahydrophthalic anhydride, succinic anhydride and their mixtures. In one embodiment, the implementation of the anhydride is the anhydride cycloaliphatic polcarbonate acid, such as hexahydrophthalic anhydride. As alternative reaction with anhydrides of carboxylic acids, the acid group may be introduced into the polyol using dimethylolpropionic acid, etc.

In the case of using a hydrophobic resin polyol as one it can be any suitable hydrophobic polyol as one resin and not limiting of the invention, examples of which include polyesters, polyethers, polyurethanes, alkyd resins, caprolactone and acrylic polyols containing hydroxyl groups and acid groups. In some embodiments, the implementation of the hydrophobic polyol as one resin has a hydroxyl number from about 50 to 300 mg KOH per 1 g of the sample, for example from about 100 to 200 mg KOH per 1 g of the sample. In some embodiments, the implementation of the hydrophobic polyol as one resin has an acid number from about 0 to 5 mg KOH per 1 g of the sample.

Although the basic ingredients of the component during storage before connecting with the activating component is not dispersed in water, the base component must be water-dispersible, to properly interact with the activator with the formation of compositions for coating. To make essentially anhydrous base component to be dispersible in water, the hydrophilic group is neutralized tertiary amine, an inorganic base or ammonia. Not limiting of the invention, examples of suitable tertiary amines include triethylamine, N,N-diethylethanolamine, trimethylamine and N,N-dimethylethanolamine. Not limiting of the invention, examples of suitable inorganic bases include the indicate the hydroxides and carbonates of alkali metals, such as sodium hydroxide, potassium hydroxide, sodium carbonate and sodium bicarbonate.

When the essentially anhydrous base component uses a mixture of hydrophobic and hydrophilic polyol as one of the resins, the base component is prepared by mixing the hydrophobic polyol as one resin with hydrophilic resin, resulting in getting the desired polyol as one mixture. Along with polyol as one binder base component may optionally include a solvent, a catalyst, a pigment, any additive, etc. Along with the fact that the solvent is added to the base component, it is also, as will be described below, may be added to the activator.

Adding solvent or base component or activator, it is desirable to use only a relatively small quantity of solvent to minimize VOC in the obtained composition for coating. The added solvent is often used to reduce the viscosity, regulation of film formation and/or eliminate some of the defects of the film. For example, the added solvent can moisten the surface of the primer layer to reduce the surface tension of the coating, dissolving the binder resin of the coating, to facilitate mixing, to adjust the film formation, to create the environment for the curing reaction and/or to adjust the time on the Eseniya and shelf life of the resulting coating. Not limiting of the invention, examples of suitable organic solvents include aliphatic hydrocarbons, aromatic hydrocarbons, ketones and esters. Not limiting of the invention, examples of suitable aliphatic hydrocarbons include hexane, heptane, octane and the like, is Not limiting of the invention, examples of suitable aromatic hydrocarbons include benzene, toluene, xylene, etc. are Not limiting of the invention, examples of suitable ketones include methyl isobutyl ketone, Diisobutylene, methyl ethyl ketone, methylhexanoate, ethylbutyrate etc. are Not limiting of the invention, examples of suitable esters include ethyl acetate, isobutyl acetate, amylacetate, 2-ethylhexylacrylate, etc. To optimize the characteristics of the coating, such as adhesion and the appearance characteristics may be used a mixture of solvents. In the case of using the solvent, it in some cases is contained in a quantity ranging from about 1 to 3 wt.%, for example, from about 1% to 2% of the total weight of the composition for cover.

Composition for coating may also include conventional additives for compositions for coatings, such as pigments, fillers, UV absorbers, additives that increase the fluidity, the agents governing the rheology and catalysts for the curing reaction. Catalysts accelerate the reaction the show and can be tertiary amines, catalysts based on compounds of the metals or their combinations. Not limiting of the invention, examples of suitable tertiary-amine catalysts include triethylamine, N-methylmorpholine, triethylenediamine, pyridine, picoline and the like, is Not limiting of the invention, examples of suitable catalysts based on metal compounds include compounds of lead, zinc, cobalt titanate, iron, copper and tin. For example, a catalyst based on metal compounds may be 2-ethylhexoic lead, 2-ethylhexoic zinc, cobalt naphthenate, tetraisopalmitate, iron naphthenate, copper naphthenate, diacetate dibutylamine, diktat dibutylamine, dilaurate dibutylamine etc.

In the case of using the catalyst of the latter is contained in a total amount from about 0.001 to 0.05 wt.% of the total solid weight of the resin materials in the composition for coating. For example, the catalyst may be contained in an amount of from about 0.005-0.02 wt.% of the total solid weight of the resin materials in the composition for cover.

The term "pigment" includes fillers and extenders, as well as traditional pigments. Pigments are materials in the form of particles, giving a final composition for coating color or opacity. Extenders and fillers are typically inorganic materials that can be used for the Nigeria cost structure or to modify its properties. Not limiting of the invention, examples of suitable pigments include carbon black, titanium dioxide, calcium carbonate, iron oxide(III), aluminum silicate, barium sulfate, and colored pigments. In the case of the use of pigments in some cases are contained in amounts ranging from about 10 to 50 wt.%, for example, from about 20 to 40 wt.%, of the total weight of the particulate material composition for a covering.

The activator includes at least one hydrophobic isocyanate. However, in one alternative implementation, the activator may include a mixture of hydrophilic and hydrophobic isocyanates. Hydrophobic isocyanate has two or more isocyanate groups, the isocyanate may be selected from dimers, trimers, adducts, polymeric and terpolymeric isocyanates. Hydrophobic isocyanates may include aromatic isocyanates, aliphatic isocyanates, or combinations thereof. Not limiting of the invention, examples of suitable aromatic isocyanates include toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, 4,4'-methylenediphenyl-diisocyanate, 2,4'-methylenediphenyl-diisocyanate, polymeric methylenedianiline, n-delete the entry, the m-delete the entry, naphthalene-1,5-diisocyanate, naphthalene-2,4-diisocyanate, 1,5-naphthalenedisulfonate, p-xylylenediisocyanate etc. are Not limiting of the invention, examples of suitable aliphatic is socyanate include isophorondiisocyanate, 1,4-cyclohexanedimethanol, 4,4'-dicyclohexylmethane-diisocyanate, bis(isocyanatomethyl)cyclohexane, tetramethylsilane-diisocyanate, 1,6-hexamethylene-diisocyanate, etc. Many of these isocyanates are commercially available from companies such as Bayer Corporation, BASF, ICI, Dow, Huntsman and Degussa.

He limiting the invention, examples of suitable hydrophilic isocyanates include diisocyanates containing polietilenoksidnoy group, a salt of sulfate groups, etc. of These isocyanates may also be selected from dimers, trimers, adducts, polymeric and terpolymeric isocyanates. Suitable hydrophilic isocyanates are commercially available from companies such as Bayer Corporation, BASF, ICI, Dow, Huntsman, and Degussa. Suitable commercial products include, for example, Bahydur 302, HR, VPLS2319, VPLS2336 and HR, all of which can be purchased from Bayer Corporation.

As noted above, to adjust the viscosity to the activating component may be added a small amount of an organic solvent. Suitable for this purpose solvents are those solvents listed above in connection with the base component. In the case of using the solvent contained in the activating component to not more than the amount that is sufficient to obtain a composition for coating amount of VOC less than about 100 g/l, in one embodiment, the implementation of the population, below about 70 g/l, in another embodiment below about 50 g/l, in yet another embodiment. For example, in one of the embodiments the solvent may be present in the activating component in an amount of from 0.5 to 1 wt.% the total weight of the polyisocyanates.

The number of base component and activator component in the composition for coating picked such that the ratio of isocyanate groups to hydroxyl groups was in the range of from about 3:1 to 1:1, for example from about 2:1 to 1:1.

In some embodiments, implementation along with essentially anhydrous base component and activator component polyurethane coating water-based also includes diluting agent. Diluting agent is used to adjust the viscosity during application and provides the environment for the formation and solidification of the film. In one embodiment, the implementation of the diluting agent contains at least one governing the rheology additive. However, if necessary, diluting agent may also contain auxiliary substances and additives, one or more allopreening emulsions and organic solvents.

To prepare the polyurethane composition for the cover, using a simple mechanical blending method or manual method mix the base component and activator whom onent and in the case of its use, diluting agent. Until shortly before the deposition of the individual components are stored separately. First mix the activating component and the base component, then add a diluting agent (if using), resulting in a gain of emulsion micelle containing isocyanates and polyols.

Composition for coating of the present invention can be applied using any suitable method of coating and can be applied to any dry film thickness.

For example, in some embodiments, the implementation of the composition for coating is applied to a dry film thickness from about 1 mils to 6 mils. In one of the embodiments of the composition for coating is applied to a dry film thickness from about 2 to 4 mils.

Composition for coating of the present invention can be applied by brush, spray, dip, roller, spreading, etc. After application of the film formation can be provided with heating or without heating. After curing at ambient temperature for at least one week or for about 24 hours at 60°C composition for coating forms a film with excellent technical characteristics. In some embodiments, the implementation of the composition coating to dry film is t about 8 to 24 hours.

Composition for coating of the present invention can be applied to any suitable substrate (including primer) and can be used as top cover, bottom cover or transparent cover. In an alternative scenario, the composition of the coating can be used as the sole coating layer, avoiding the need for separate upper floor, lower floor and/or transparent coating.

Suitable substrates include metal and polymer substrates, but are not limited to. Suitable metal substrates include, but are not limited to, a foil, a sheet or workpiece, is made, for example, of cold rolled steel, stainless steel surface-treated with any of the following agents: metallic zinc, zinc compounds and zinc alloys (including steel, galvanized electrolytic method, steel, galvanized hot dip, GALVANNEAL steel and steel with electrolytic-coated zinc alloy), copper, magnesium and their alloys, aluminum alloys, zinc-aluminum alloys such as GALFAN, GALVALUME. You can also use steel substrate caused by electrolytic aluminum and aluminum alloys. Among the suitable metal substrates entrance is t also silver, gold and their alloys.

Examples of suitable polymeric substrates include polystyrene, polyamides, polyesters, polyethylene, polypropylene, melamine resins, polyacrylates, polyacrylonitrile, polyurethanes, polycarbonates, polyvinyl chloride, polyvinyl alcohols, polyvinyl acetate, polyvinylpyrrolidone and corresponding copolymers and block copolymers, biorstwami polymers and natural polymers such as gelatin.

As the content of the proposal, the present invention also relates to substrates at least partially coated with a coating composition for coating of the present invention, as well as to appropriate methods of coating a substrate with the composition for coating of the present invention.

Examples

The following not limiting of the invention examples illustrate typical formulations of polyurethane compositions for coating water-based present invention. In the examples and comparative examples can be listed in table 1 of the original materials.

Acetone
Table 1
Source materialDescriptionProvider
Lexorez 1405-65Sour is Oliver-polyol as one resin Inolex Chemical Company
K-Flex 188The polyester-polyolKing Industries
K-Flex XMA308The polyester-polyolKing Industries
SARAH 4101Caprolactone - polyolSolvay Caprolactones
Desmophen 365Acrylic polyol as one resinBayer Material Science
Bayhydrol XP2470Acrylic polyol, water-basedBayer Material Science
Bayhydrol XP7093The polyester-polyol, water-basedBayer Material Science
Desmodur XP2410Hydrophobic polyisocyanateBayer Material Science
Bayhydur VP LS2319Hydrophilic polyisocyanateBayer Material Science
Bayhydur XP2570Hydrophilic polyisocyanateBayer Material Science
The triethylamineAminAldrich
Pure solventAldrich
Tert-butyl acetatePure solventLyondell
Proglyde DMMSolventDow Chemical Company
Methyl propyl ketoneSolventEastman Chemical Company
MethylmercaptanSolventEastman Chemical
Additive Baysilone 3468Improving fluidity additiveLanxess Corporation
Tinuvin 1130UV stabilizerCiba Specialty Chemical
Tinuvin 292UV stabilizerCiba Specialty Chemical
Surfynol 104BCMoisturizing additiveAirproducts
Byk-345Moisturizing additiveBYK-Chemie
Borchi Gel PW25Rheological additiveLnxess Corporation
Ti pure R706TiO2DuPont
Aerosil R942SiO2Degussa Corporation

Comparative examples

Compositions for coating water-based according to the following comparative examples 1 and 2 obtained by separate preparation and storage of the base component, the activating component and a diluting agent. Shortly before application of the composition to cover the base component is mixed with the activating component, using wysokosciowe mixing equipment. After that add a diluting agent and the mixture is again stirred. The resulting composition is applied, for example, spraying it through high volume spray gun low pressure, on an aluminum substrate coated with a primer SO from the company PRC-DeSoto Int., Inc.

Comparative example 1

Polyurethane coating water-based prepared using the compositions shown in table 2. This coating has a level LOS 99,66 g/l and the level of non-volatile materials (NLM) 49,96%.

Table 2
The base componentis ECOWAS percentage
Deionized water5,49
BYK-0110,65
DisperBYK-1901,83
Ti pure R70620,33
Aerosil R9420,09
Byk-3450,51
Borgiel PW250,13
Additive Baysilone 34680,46
Bayhydrol XP247033,18
Deionized water3.04 from
The activating componentThe weight percentage
DesmodurXP24106,00
Bayhydur XP25707,02
Proglyde DMM0,51
Diluting agentThe weight percentage
Deionized water20,78

Comparative example 2

Polyurethane coating for water OS is ove prepared using the composition, given in table 3. This coating has a level LOS 24,46 g/l and the level NLM 49,45%.

Table 3
The base componentThe weight percentage
Deionized waterof 5.29
BYK-0110,58
DisperBYK-1903,23
Ti pure R70620,58
Baysilone Additive 34680,40
Bayhydrol XP24701,70
Bayhydrol XP709339,58
Deionized water9,04
The activating componentThe weight percentage
DesmodurXP2410for 6.81
Bayhydur XP25707,12
Diluting agentThe weight percentage
Deionized waterthe 5.65

Por what measures

Compositions for coating water-based according to the following examples 1-7 were obtained by separate preparation and storage of the base component, the activating component and a diluting agent. Shortly before application of the composition for coating on a substrate base component manually mixed with the activating component, using, for example, a spatula. After that add a diluting agent and the mixture is again stirred manually. Each of the obtained composition is applied, for example, spraying it through high volume spray gun low pressure, on an aluminum substrate coated with a primer SO from PRC-DeSoto Int., Inc. The coating then utverjdayut at ambient temperature for about one week.

Example 1

Polyurethane coating water-based prepared using the compositions shown in table 4. This coating has a level LOS 43,50 g/l and the level NLM 66,5%.

td align="center"> 1,18
Table 4
The base componentThe weight percentage
Lexorez 1405-6511,51
K-Flex XMA30811,51
The triethylamine
Proglyde DMM1,55
The activating componentThe weight percentage
Desmodur XP24109,43
Bayhydur XP257011,04
Diluting agentThe weight percentage
Deionized water53,75

Example 2

Polyurethane coating water-based prepared using the compositions shown in table 5. This coating has a level LOS 69,60 g/l and the level NLM 42,34%.

Table 5
The base componentThe weight percentage
Lexorez 1405-6511,75
K-Flex 18811,75
The triethylamine1,20
Proglyde DMM1,59
The activating componentThe weight percentage
Desmodur XP2410 8,68
Bayhydur XP257010,16
Diluting agentThe weight percentage
Deionized water54,87

Example 3

Polyurethane coating water-based prepared using the compositions shown in table 6. This coating has a level LOS 50,42 g/l and the level NLM 62,20%.

Table 6
The base componentThe weight percentage
Lexorez 1405-658,18
K-Flex XMA3088,18
The triethylamine0,83
Methyl propyl ketone0,98
Ti-pure R76032,72
The activating componentThe weight percentage
Desmodur XP24106,04
Bayhydur XP25707,08
Diluting agent The weight percentage
Deionized water35,99

Example 4

Polyurethane coating water-based prepared using the compositions shown in table 7. This coating has a level LOS 50,44 g/l and the level NLM 62,20%.

Table 7
The base componentThe weight percentage
Lexorez 1405-658,18
K-Flex XMA3088,18
The triethylamine0,83
Methylmercaptan0,98
Ti pure R76032,72
The activating componentThe weight percentage
Desmodur XP24106,04
Bayhydur XP25707,08
Diluting agentThe weight percentage
Deionized water35,99

Example 5

Polyuretha the TV coverage water-based prepared using the composition, shown in table 8. This coating has a level LOS 45,59 g/l and the level NLM 62,00%.

Table 8
The base componentThe weight percentage
Lexorez 1405-655,13
Desmophen 3652,77
K-Flex XMA308the 10.40
The base componentThe weight percentage
The triethylamine0,57
Methylmercaptan0,35
Ti-pure R76026,34
The activating componentThe weight percentage
Desmodur XP2410of 7.48
Bayhydur XP25708,77
Diluting agentThe weight percentage
Deionized water38,12

Example 6

Polyurethane coating water-based prepared and with the use of the composition, shown in table 4. This coating has a level LOS 70,80 g/l and the level NLM 52,80%.

Table 9
The base componentThe weight percentage
Lexorez 1405-653,96
Desmophen 3652,11
SARAH 41012,64
K-Flex XMA3085,28
The triethylamine0,43
Acetone0,99
Baysilone Additive 34680,13
Surfynol 104BC0,13
Ti pure R7067,39
The activating componentThe weight percentage
Desmodur XP24109,16
Bayhydur VP LS231912,41
Diluting agentThe weight percentage
Bayhydrol XP2470 2,43
Borgiel PW250,23
Deionized water31,68

Example 7

[Polyurethane coating water-based prepared using the compositions shown in table 4. This coating has a level LOS 69,60 g/l and the level NLM 47,89%.

Table 10
The base componentThe weight percentage
Lexorez 1405-653,60
Desmophen 3651,58
Solsperse 390000,18
K-Flex XMA3085,67
The triethylamine0,39
Tert-butyl acetateof 4.44
Tinuvin 11300,64
Tinuvin 2920,32
Baysilone Additive 34680,10
Surfynol 104BC0,10
Ti pure R706 14,79
The activating componentThe weight percentage
Desmodur XP241013.56MHz
K-Kat XC62120,14
Diluting agentThe weight percentage
Bayhydrol XP247017,74
Borgiel PW250,44
Deionized water36,47

Tests and results

As shown in the above examples, the level of LOS of the obtained composition for coating can be adjusted by selection of the quantities and contents of the base component, a trigger component, and diluting agent. Accordingly, in some embodiments, the implementation of the composition for coating have a LOS levels lower than about 100 g/l, as shown in example 6. In other embodiments, implementation of the composition for coating have a LOS levels lower than about 70 g/l, as shown in examples 2, 3, 4, and 7. In some embodiments, the implementation of the composition for coating have a LOS levels lower than about 50 g/l, as shown in examples 1 and 5./p>

Tests in the examples and comparative examples were conducted to determine various performance characteristics, including adhesive tape, matte and specular gloss (measured at angles of 20 and 60°), resistance to methyl ethyl ketone, the curing time to the touch, impact resistance, resistance to hot water and resistance to Skydrol. In addition, in each example and comparative example were determined content NLM and the level of VOC in g/l Content NLM was determined according to ASTM D3960. Content NLM and levels of VOC in the examples and comparative examples above.

Adhesion tape

The adhesive tape was determined according to ASTM D3359. The results are shown in table 11

Table 11
SampleAdhesion tape
Comparative example 15V
Comparative example 25V
Example 15V
Example 25V
Example 35V
Example 45V
Example 55V
Example 65V
Example 75V

Matte and mirror gloss

The matte and specular gloss was determined according to ASTM E430 and D523 using the device BYK-Gardner Haze-Gloss. The results are shown in table 12.

Table 12
SampleMatt20°60°
Comparative example 129,177,5of 87.3
Comparative example 236,877,9of 87.0
Example 18,483,0to 89.9
Example 28,883,190,7
Example 316,180,590,5
Example 4 3,682,892,8
Example 54,685,193,8
Example 66,384,2for 93.4
Example 72,883,792,4

Resistance to methyl ethyl ketone

Resistance to methyl ethyl ketone was determined according to ASTM D5402, using 200 double proteron with methyl ethyl ketone. The results are shown in table 13

Table 13
SampleResistance to methyl ethyl ketone
Comparative example 1Acceptable
Comparative example 2Acceptable
Example 1Acceptable
Example 2Acceptable
Example 3Acceptable
Example 4 Acceptable
Example 5Acceptable
Example 6Acceptable
Example 7Acceptable

The curing time to the touch

The curing time texture was determined according to ASTM D1640. the results are shown in table 14

Table 14
SampleThe setting time to the touch
Comparative example 12 hours
Comparative example 28 hours
Example 112 hour
Example 212 hour
Example 312 hour
Example 412 hour
Example 512 hour
Example 64 to 6 h
Example 74 to 6 h

Resistance to shock/p>

Impact resistance was determined according to ASTM D2794 when using the tester BYK-Gardner Impact Tester. The results are shown in table 15.

Table 15
SampleImpact resistance (direct/reverse)
Comparative example 120/10 lbs/inch
Comparative example 280/80 lb/inch
Example 1100/100 lb/inch
Example 2100/100 lb/inch
Example 3100/100 lb/inch
Example 4100/100 lb/inch
Example 5100/100 lb/inch
Example 6100/100 lb/inch
Example 7100/100 lb/inch

Resistance to hot water

Resistance to hot water was determined according to ASTM D870. Each sample was immersed in deionized water at 70°C for 24 hours. The results are shown in table 16.

Table 16
SampleResistance to hot water
Comparative example 1Acceptable
Comparative example 1Acceptable
Example 1Acceptable
Example 2Acceptable
Example 3Acceptable
Example 4Acceptable
Example 5Acceptable
Example 6Acceptable
Example 7Acceptable

Resistance to Skydrol

Resistance to Skydrol was determined according to ASTM D870. Each sample was immersed in hydraulic fluid Skydrol LD-4 (from Solutia, Inc.) for 24 hours at 70°C. the Results are shown in table 17.

Table 17
SampleResistance to Skydrol
Compare the nutrient example 1 Acceptable
Comparative example 2Acceptable
Example 1Acceptable
Example 2Acceptable
Example 3Acceptable
Example 4Acceptable
Example 5Acceptable
Example 6Acceptable
Example 7Acceptable

As follows from the results of the tests, compositions for coatings based on water from examples 1-7 have greatly reduced levels of VOCS as compared with comparative example 1 in which the base component is dispersed in water. Along with this composition for coatings based on water from examples 1-7 have significantly improved performance characteristics. For example, compositions for coatings based on water from examples 1-7 have significantly better resistance to shock and glassy gloss in comparison with the compositions of comparative examples 1 and 2. Although the composition according to comparative example 2 has more discouraging LOS, it has much the worst characteristics in comparison with the compositions according to examples 1-7. Compositions according to examples 1-7 are able to combine very low VOC with excellent technical characteristics - a fact that was not previously achievable to compositions for coating water-based.

In addition, compositions for coating water-based of examples 1-7 have the technical characteristics similar to the characteristics of traditional compositions for coatings, solvent-based. In particular, one of the commercially available compositions for coatings, solvent-based is SA from the company PRC-DeSoto Int., Inc. Matte and mirror at an angle of 20° gloss (10,5/83,6) of this composition for coating solvent-based very close to the values specified above for the compositions for coating water-based from examples 1-7. the impact resistance of this composition at 100/100 lbs/inch, the same as in the above compositions, water-based from examples 1-7. Accordingly, compositions, water-based present invention not only possess low values of VOC, but also, and very significantly improved performance characteristics compared to conventional compositions, water-based, or at least not inferior to the technical characteristics of their counterparts on the basis of RA the creators and the corresponding high performance requirements, for example, in the aerospace industry.

The present invention is described with reference to typical embodiments of aspects, but are not limited to them. Professionals in this field should be clear that without significant departure from the invention can be made other modifications and applications. For example, compositions for coating described as obtained using a simple mechanical blending or mixing by hand. However, it is clear that for mixing compositions for coating of the present invention can be used and other ways of mixing. In addition, although the composition of the coating is described as suitable for use in the aerospace field, they are also suitable for other applications. Accordingly, the above description should not be considered limited to the described specific implementation options and aspects, but should be considered relevant to the following claims and supporting claims, which represents the most complete and the most restrictive scope of embodiments and aspects.

Throughout the text and in the claims the use of the word "about" in relation to ranges of values is intended to modify both the highest and lowest of these values and reflects the area of the penumbra variations, tie is the R dimension, significant digits and interchangeability, which are familiar to understand for ordinary specialist in the field of technology to which the invention belongs.

1. Composition for coating water-based, including:
(a) essentially anhydrous base component containing at least one hydrophilic polyol as one resin which is selected from the group consisting of polyesters, polyethers, polyurethanes, caprolactone, alkyd resins, and combinations thereof, and at least one hydrophobic polyol as one pitch;
(b) activating component containing at least one hydrophobic polyisocyanate; and
(c) water;
moreover, this composition contains from 1 to 3 wt.% organic solvent to the total weight of the composition for coating water-based and components (a), (b) and (C) are mixed shortly before application of the composition for coating water-based.

2. Composition for coating water-based according to claim 1, which further comprises a diluting agent.

3. Composition for coating water-based according to claim 2, in which the diluting agent is water.

4. Composition for coating water-based according to claim 1, in which the content of the hydrophilic polyol as one resin in essentially anhydrous base component is from about 10 to 80 wt.% by weight, essentially anhydrous base component, the content of hydrophobes polyol as one of resin, essentially anhydrous base component is from about 20 to 90 wt.% by weight, essentially anhydrous base component.

5. Composition for coating water-based according to claim 1, in which the hydrophilic polyol as one resin has a hydroxyl number from about 20 to 120 mg KOH per 1 g of the sample and an acid number from about 10 to 90 mg KOH per 1 g of the sample.

6. Composition for coating water-based according to claim 1, in which the hydrophobic polyol as one resin has a hydroxyl number from about 50 to 300 mg KOH per 1 g of the sample and an acid number from about 0 to 5 mg KOH per 1 g of the sample.

7. Composition for coating water-based according to claim 1, in which the hydrophobic polyol as one resin selected from the group consisting of polyesters, polyethers, polyurethanes, caprolactone, alkyd resins, acrylic polyols, and combinations thereof.

8. Composition for coating water-based according to claim 1, in which the activating component further comprises a hydrophilic polyisocyanate.

9. Composition for coating water-based according to claim 1, in which, essentially anhydrous base component contains at least about 10 wt.% hydrophilic polyol as one of resin by weight, essentially anhydrous base component.

10. Composition for coating water-based, including:
(a) essentially anhydrous base component containing at least od is the hydrophilic polyol as one resin and at least one hydrophobic polyol as one resin;
(b) activating component containing at least one hydrophobic polyisocyanate; and
(c) water;
moreover, this composition contains from 1 to 3 wt.% organic solvent to the total weight of the composition for coating water-based and components (a), (b) and (C) are mixed shortly before application of the composition for coating water-based.

11. Composition for coating water-based of claim 10, in which, essentially anhydrous base component contains at least about 10 wt.% hydrophilic polyol as one of resin by weight, essentially anhydrous base component.

12. Composition for coating water-based of claim 10, in which the activating component further comprises at least one hydrophilic polyisocyanate.

13. Composition for coating water-based of claim 10, in which the hydrophobic polyol as one resin selected from the group consisting of polyethers, polyurethanes, caprolactone, alkyd resins, acrylic polyols.

14. Composition for coating water based on paragraph 10, which is cured without heating.

15. The coating obtained from the composition according to any one of claims 1 to 14.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to pipeline construction and is used in field and basic conditions when laying underground main pipelines for protection thereof from corrosion, mechanical damage and during construction of gas or liquid transporting field and industrial pipelines in conditions of permanently frozen soil, when laying pipelines on swamps, on waterlogged areas, particularly for repairing anti-corrosion coatings of oil pipelines, oil product pipeline and gas pipelines during repair thereof in field conditions, including without stopping transportation of the product, and during corrosion protection of piping of compressor stations at pipeline temperature of 70-90°C, on a section of a pipeline transporting gas at temperature above zero after a compressor station, e.g. at a section of a discharge line transporting compressed gas at temperature of plus 40°C. Versions of anti-corrosion paint for obtaining an external polyurethane two-component protective coating are given. The paint is obtained by mixing component A and component B - polyisocyanate based on diphenyl methane diisocyanate with equivalent mass of 131-135. Component A is a suspension of substances in a hydroxyl-containing polyatomic alcohol with ether and ester bonds with equivalent mass of 230….250.

EFFECT: providing high rate of hardening of the coating with improved protective properties thereof, which prevents development of underfilm and stress corrosion on the pipeline for a period of time comparable with the life of the pipeline.

6 cl

FIELD: chemistry.

SUBSTANCE: invention relates to construction and can be used in road construction. The coating contains a polymer base - two liquid low-molecular weight rubbers with terminal epoxy and carboxyl functional groups, copolymerisable and three-dimensionally cross-linked by an agent. Said rubber is polydiene isoprene urethane rubber with terminal epoxy groups and polybutadiene rubber with terminal carboxyl groups. The coating also contains filler in form of polyfractional silicon dioxide and additionally contains processing additives which include a three-dimensionally cross-linking agent with epoxy functional groups which are antipodal with respect to carboxyl groups, a thixotropic booster and an elastomer pigment - technical carbon and a catalyst for three-dimensional cross-linking rubber. The ingredients are in the following ratio, wt %: two liquid low-molecular weight rubbers with terminal epoxy and carboxyl functional groups - 9.0-18.0, polyfractional silicon dioxide - 77.0-86.5, process additives - 4.5-5.0.

EFFECT: improved waterproofing properties and frost-resistance of road asphalt.

2 cl, 1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to use of nanomaterials in wire enamel for improving thermal properties of enamel. The nanomodified wire enamels are usually used in making insulated winding wire. The polymer base of wire enamel is selected from a group comprising polyamideimide, polyester, polyesterimide, polyurethane and mixtures thereof. The nanomaterial is selected from a group comprising nano-oxides, metal nano-oxides, metal oxides or hydroxides of aluminium, tin, born, germanium, gallium, lead, transition metals, lanthanides, actinides and mixtures thereof. The nanomaterial is also selected from a group comprising nano-oxides, metal nano-oxides, metal oxides and hydroxides of aluminium, silicon, titanium, zinc, yttrium, vanadium, zirconium, nickel and mixtures thereof. After applying enamel on the wire and curing thereof, the wire exhibits improved thermal and mechanical properties.

EFFECT: improved thermal properties of enamel.

8 cl, 6 tbl

FIELD: chemistry.

SUBSTANCE: radiation curable secondary coating composition contains an alpha-oligomer which does not contain urethane, obtained by reacting the following components: (a) an acrylate compound selected from an alcohol-containing acrylate or alcohol-containing methacrylate compound, (b) an anhydride compound, (c) an expoxide-containing compound, (d) an optional chain extending compound, and (e) an optional catalyst. Said composition additionally contains a beta-oligomer, said beta-oligomer being different from said alpha-oligomer, said beta-oligomer obtained by reacting 1) hydroxyethyl acrylate; 2) one or more diisocyanates; 3) a glycol selected from a group consisting of polyether polyols and polyester polyols. The polyester polyols are obtained by reacting a polyatomic alcohol with a polybasic acid, wherein the polyether polyols are selected from a group consisting of polyethylene glycol, polypropylene glycol, a copolymer of polypropylene glycol and ethylene glycol, polytetramethylene glycol, polyhexamethylene glycol, polyheptamethylene glycol and polydecamethylene glycol; and 4) a catalyst. The invention also relates to a wire and an optical fibre having a secondary coating made from said composition.

EFFECT: high rate of curing the coating while ensuring desirable coating properties, such as modulus of elasticity, impact viscosity and elongation.

8 cl, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing self-curing polyurethane dispersions, use thereof as coating agents, coating agents containing these self-curing aqueous dispersions, a method of coating substrates, as well as substrates treated with coating agents. The method of producing self-curing aqueous polyurethane dispersions involves the following steps: I. reacting al) polyisocyanate with a mixture of, a2) 2,2-bis(hydroxymethyl)alkanecarboxylic acid as an anionic hydrophilisation agent containing a group which is reactive towards isocyanate and, a3) at least one polyol component with average OH-functionality >1, wherein any mixture from a2) and a3), or component a1) k) contains at least one catalyst selected from a group consisting of tertiary amines, tin, zinc or bismuth compounds; II obtaining an OH-functional polyurethane without NCO-groups from step I, which then; III. a4) is mixed with a reactive blocking agent for isocyanate groups, selected from a group consisting of butanone oxime, diisopropylamine or tert-butylbenzylamine, 3,5-dimethylpyrazole, triazole, respectively, mixture thereof; IV. subsequent reaction of that mixture from step III with a5) one or more polyisocyanates selected from group a1), wherein these polyisocyanates are the same as or are different from al), and subsequent V. obtaining a physical mixture of OH-functional polyurethane without NCO-groups and a blocked polyisocyanate from step IV, after which after either; VI. acid groups of OH-functional polyurethane a6) are completely or partially deprotonated by adding a neutralising agent; VII. and the polyurethane obtained at step VI id dispersed in water, or step VII is carried out before step VI.

EFFECT: obtaining self-curing aqueous polyurethane dispersions containing negligible amounts of cosolvent.

14 cl, 1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing coating material. Disclosed is a method of producing coating material in form of powdered lacquer or a fluid resin, characterised by that one or more alcohols or polyols react with one or more silanes selected from a group consisting of (isocyanatomethyl)methyl-dimethoxysilane, 3-isocyanatopropyl-trimethoxysilane and 3-isocyanatopropyl-triethoxysilane, to form a covalent bond between the alcohol or polyol and the silane such that the reaction product is a high-molecular weight silane which is cured directly using a catalyst, wherein all alcohol or polyol organic functional groups participate in the reaction with the silane organic functional group. Coating material and use thereof are also disclosed.

EFFECT: disclosed method enables to obtain coating material which can be used to make scratch-resistant coatings.

12 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to rocket engineering, particularly to production of a protective-adhesive lacquer which is used as a primer for binding an inhibiting coating with the surface of the charge when inhibiting solid-propellant charge. The protective-adhesive lacquer contains 4,4',4"-triphenylmethane triisocyanate, dichloroethane, as an adhesive additive - a product of polycondensation of ethylene glycol, adipic acid and glycerine, with content of hydroxyl groups from 2.00 to 2.30 wt % and dibutyltin dilaurate as a curing agent.

EFFECT: obtaining lacquer with high capacity for protection from migration processes in the "fuel-inhibiting coating" system, which reduces smoke formation, increases adhesion strength between the inhibiting coating and the surface of the propellant charge, which contains polyformaldehyde derivative-based components, avoids use of an additional cellulose acetate-based primer, which ensures strong adhesion of solid-propellant charge pellets with the inhibiting coating for the guaranteed storage life of the charge and which enables to use readily available domestic raw materials.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polymeric heat-reflecting coating compositions which are applied on inflatable structures, protective and rescue equipment (airstairs for civil aviation, floatation rafts, airships, pneumatic tents, heat-reflecting screens, shields for firefighters), consisting of airtight elastic material based on fabric (capron, nylon, lavsan, high-strength aramid fibre SVM). The polymeric heat-reflecting coating composition contains urethane rubber, a hardener, aluminium paste and ethyl acetate.

EFFECT: production of cold-curable polymeric heat-reflecting coating composition, having high resistance to thermal radiation (up to 29 kW/m2) and minimum weight gain (thickness).

3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to thermally solidificated covering substances based on aprotic solvents. Claimed is covering substance, which contains at least one compound (A), which contains hydroxyl groups, at least one compound (B) with free and/or blocked isocyanate groups, and at least one catalyst (D) for cross-linking silane groups, with one (i) or several components of covering substance containing hydrolysed silane groups and (ii) covering substance can be finally solidificated for covering, which has statistically distributed regions of lattice Si-O-Si. Obtained from covering substance solidificated coating has index of further cross-linking (PCI) lower than 2, with index of the further linking (PCI) being determined as coefficient from memory module E'(200) of finally solidificated coating, measured at 200°C, to minimum of memory module E'(min) of finally solidificated covering, measured at temperature higher than temperature of transition into glass-like state of Tg, and memory modules E'(200) and E'(min),as well as temperature of transition into glass-like state Tg are measured on free films with thickness of layer 40 mcm+/-10 mcm by means of dynamic mechanical thermal analysis (=DMTA) at rate of heating 2 K per minute and frequency 1 Hz and DMTA measurement on free films with thickness of layer 40 mcm+/-10 mcm, which are solidificated for 20 minutes at object temperature 140°C and after solidifying are kept for 8 days at 25°C, before carrying out DMTA measurements. Polyisocyanate (B) at least partially has one or several similar or different structural units of formula -X-Si-R"XG3-X, where G = identical or different hydrolysed groups, in particular alcoxy group, X=organic residue with from 1 to 20 carbon atoms, R" =alkyl, cycloalkyl, aryl or aralkyl, and carbon chain can be broken by non-adjacent oxygen groups, sulphur or NRa, with Ra=alkyl, cycloalkyl, aryl or aralkyl, x=0 to 2. Catalyst (D) is phosphorus-containing, and covering substance contains catalyst (D) from 0.1 to 10 wt % in terms of non-volatile components of covering substance. Also claimed are multi-step method of applying coating with application of claimed covering substance, as well as application of claimed method and versions of claimed coating application.

EFFECT: possibility to obtain transparent varnish coating with high resistance to atmospheric impact.

18 cl, 4 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to thermally solidificated covering substances based on aprotic solvent. Claimed is covering substance, which contains at least one compound (A), containing hydroxyl groups, at least one compound (B), containing isocyanate groups, and at least one phosphorus-containing catalyst (D) for cross-linking silane groups, with one or several components of covering substance containing between 2.5 and 97.5 mole %, counted for totality of structural units -N(X-SiR"x(OR')3-x)n(X'-SiR"y(OR')3-y)m (II) and -Z-(X-SiR"x(OR')3-x) (III), at least one structural unit of formula (II), where R'=hydrogen, alkyl or cycloalkyl, carbon chain can be interrupted by means of non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, X,X'=linear and/or branched alkylene pr cycloalkylene residue with from 1 to 20 carbon atoms, R" =alkyl, cycloalkyl, aryl or aralkyl, and carbon chain can be interrupted by means of non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, preferably R"=alkyl residue, n=0 to 2, m=0 to 2, m+n=2, x,y=0 to 2; and between 2.5 and 97.5 mole %, counted per totality of structural units (II) and (III), at least one structural unit of formula (III), where Z=-NH-, -NR-, -O-, R=alkyl, cycloalkyl, aryl or aralkyl, and carbon chain can be interrupted by means of non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, x=0 to 2, and X, R', R" have value, given above, and covering substance can be finally solidificated before covering, which has statistically distributed regions of lattice Si-O-Si. Also claimed are multi-step method of applying coating with application of claimed covering substance, as well as application of claimed method and versions of claimed coating application.

EFFECT: possibility to obtain transparent varnish coating with high resistance to formation of cracks under atmospheric impact and perfect resistance to scratching.

18 cl, 4 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing polyisocyanates which contain allophanate and silane groups by reacting (A) at least one hydroxy urethane or hydroxy amide, having silane groups, which is obtained by reacting aminosilanes with cyclic carbonates or lactones with molar excess relative to NCO reactive groups of component (A), (B) at least one diisocyanate with aliphatically, cycloaliphatically, araliphatically and/or aromatically bound isocyanate groups, in the presence of a catalyst which speeds up formation of allophanate groups and, optionally, subsequent removal of unreacted excess diisocyanates. Polyisocyanates which contain allophanate and silane groups obtained using said method are also described.

EFFECT: obtaining polyisocyanates which contain allophanate and silane groups which also have high isocyanate functionality in each molecule yet also low viscosity, which improves operating properties of polyisocyanates, especially as cross-linking components in polyurethane lacquer and coatings.

13 cl, 10 ex

Adhesive substances // 2466149

FIELD: chemistry.

SUBSTANCE: invention relates to aqueous compositions for gluing substrates, a method of obtaining such compositions, as well as a method of making latent-reactive coatings, films and powders from said compositions. The aqueous compositions for gluing substrates contain: polymers dispersed in water, having groups capable of reacting with isocyanate, such as urethane groups and urea groups; at least one dispersed solid aliphatic polyisocyanate which is not surface-active, with softening temperature higher than or equal to 40°C; one or more compounds of group (subgroup) 5 and 6 elements, in which the oxidation state of said element is at least +4; and optionally other additives and auxiliary materials.

EFFECT: obtaining novel compositions for gluing substrates and latent-reactive coatings, films and powders based thereon, which are stable during storage and stable with respect to colour.

18 cl, 1 dwg, 6 ex

FIELD: construction.

SUBSTANCE: invention represents an emulsion, in which oligomers with terminal isocyanate groups are a dispersion medium, and a disperse phase is a solution or a dispersion produced as a result of mixing a lime solution with calcium hydroxide content of 10-70 wt % with glycerine in the amount of 1-250 wt parts per 100 wt parts of calcium hydroxide, besides, the disperse phase content in the composition makes 1-55 wt %.

EFFECT: development of a cheap and easy to apply composition, coatings from which have high adhesion to moist metal or concrete surfaces, have proper adhesion to concrete applied onto them, are hardened with specified speed at temperature from zero and above, inhibit processes of metal corrosion and have low elasticity module.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a coating composition containing a) polyacrylate polyol obtained via polymerisation of unsaturated olefin monomers, where at least 40 wt % of the monomers include straight or branched alk(en)yl or alk(en)ylene groups, having at least 4 carbon atoms; b) polyether polyol obtained via esterification of component links having functional groups which form an ester, where at least 30 wt % of component links include straight or branched alk(en)yl or alk(en)ylene groups with at least 4 carbon atoms per functional group, which forms an ester, where he polyether polyol has hydroxyl number higher than 280 mg KOH/g and hydroxyl functionality of at least 2, and c) isocyanate-functionalised cross-linking agent. The invention also relates to a set of parts for preparing the coating composition and a method of applying the coating composition. The coating composition can be used as a top coating layer in multilayer paint coats, in finishing or reworking automobiles or large vehicles.

EFFECT: coating has high hardness, scratch resistance, lustre, longevity and wear resistance, chemical resistance and UV radiation resistance.

15 cl, 6 tbl

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention relates to coating composition, applied, for instance, as transparent coatings, base coatings, pigmented coating layers, used, prime coatings, etc. Composition contains polyisocyanate, polyol, metal-based catalyst for carrying out reaction of addition reaction between isocyanate groups and hydroxyl groups, thiol-functioning compound and carboxylic acid, carbonyl group of carboxylic acid being in connection with π-electronic system.

EFFECT: creation of novel coating composition, demonstrating presence of favourable property balance, namely, low level of volatile organic solvent content with operation viscosity, high rate of hardening and long viability, which results in obtaining coatings, which demonstrate good outlook characteristics, in particular, low liability to formation of pinholes, and good hardness.

14 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: polyisocyanate contains biuret groups, has functionality on isocyanate groups of not less than 4 and not more than 10 and is obtained using a method which includes (A) reaction of a polyisocyanate adduct with a secondary monoamine of formula (R1)(R2)NH, with the ratio of the isocyanate equivalent to the amine equivalent ranging from approximately 4:1 to approximately 14:1 to introduce biuret groups into said polyisocyanate, and (B) reaction of the polyisocyanate containing biuret groups with a blocking reagent. The polyisocyanate adduct (a) is obtained from 1,6-hexamethylenediisocyanate, (b) has average functionality on isocyanate groups of not less than 2.5 and not more than 8, and (c) contains isocyanurate groups. The blocking reagent is selected from a group comprising phenol, cresol, amides, oximes, hydrazones, pyrazoles and phenols which are substituted with long aliphatic chains.

EFFECT: obtaining blocked polyisocyanates which combine relatively low viscosity and low molecular weight with high functionality on isocyanate groups and high reactivity relative to binders used in coatings, as well as which are stable during storage with respect to increase in viscosity and are virtually colourless, which is especially important for systems which form transparent coatings.

9 cl, 6 ex, 5 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: chemistry of polymers.

SUBSTANCE: invention relates to aromatic polyurethane polyols used as components of priming compositions. Invention describes the priming composition comprising aromatic polyurethane polyol including product of reaction: (a) at least one diol component among number of α,β-diols, α,γ-diols and their mixtures; (b) at least one triisocyanate; (c) at least one diisocyanate wherein at least one isocyanate is aromatic one, and molecular mass or aromatic polyurethane polyol is 3000 Da, not above, and a cross-linking agent also. Prepared aromatic polyurethane polyol shows viscosity value by Brookfield at the level 8260 centipoises, OH-number 192.6 KOH/g and the dispersity (Mn/Mw) at the level 3.0. Priming compositions prepared by using indicated aromatic polyurethane polyol are useful in finishing large means of transportation, for example, trains, trucks, buses and airplanes, in particular, in vehicle body works. Also, invention relates methods for applying priming compositions on support comprising applying indicated compositions, and to a method for finishing car in repairs comprising applying the indicated priming composition.

EFFECT: improved and valuable properties of composition.

11 cl, 5 tbl, 12 ex

FIELD: chemical industry; methods of production of a thermosetting elastomers.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the methods of production of a thermosetting polyurethane elastomer and also to the elastomer produced according to the given method. The invention presents the method of production of the polyurethane elastomer having a total apparent density exceeding 150 kg/m3 and providing for an interaction of polyisocyanate and a reactive to isocyanate composition not necessarily at presence of water, according to which the reaction conduct at an isocyanate index of 85-120. At that the polyisocyanate component is composed of: al) 80-100 mass % of diphenylmethanediisocyanate containing at least 40 mass % of 4.4'- diphenylmethanediisocyanate and-or a derivative of the indicated diphenylmethanediisocyanate, which (the derivative) is a may be a liquid at the temperature of 25°C and has NCO value of no less than 20 mass % and a2) 20 mass % of the other polyisocyanate; the reactive to isocyanate composition b) consists of b1) 80-100 mass % of a simple polyol polyester having an average nominal functionality - 2-8, average reactive equivalent weight of 750-5000, an average molecular mass of 2000-12000, the share of oxyethylene - 60-90 mass % and the share of the primary hydroxyl groups of 70-100 mass % calculated for the total number of the primary and the secondary hydroxyl groups in polyol; b2) a reactive to isocyanate extender of the chain in such a quantity, that the ratio of the rigid block makes less than 0.45; and b3) - 20-0 mass % of one or more of other reactive to isocyanate composition excluding water. At that the amount of the polyol of 61) and the reactive to isocyanate composition 63) is calculated from the total amount of the indicated polyol 61) and the composition 63). The invention presents also description of the thermosetting elastomer produced according to the indicated method.

EFFECT: the invention ensures production of a thermosetting polyurethane elastomer.

10 cl, 2 ex

The invention relates to a light-resistant, elastomeric, polyurethane moulded products

FIELD: chemistry.

SUBSTANCE: invention relates to a hydroxy-functional binding substance having a hydroxyl number ≥180, determined according to DIN 53240, and a solubility parameter SP ≤10. The present invention also relates to methods of producing said binding substance, a transparent lacquer composition containing said substance and to a substrate coated with such a transparent lacquer composition.

EFFECT: obtaining binding substances for transparent lacquer compositions having high content of solid substances, which lead to formation of coatings with high scratch resistance, chemical resistance and good optical properties.

18 cl, 1 tbl, 4 ex

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