Method for preparing stable aqueous dispersion of polycarbodiimide that do not contain organic solvents and can be used as cross-linking agents

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for preparing stable aqueous dispersions of polycarbodiimide for using as a cross-linking agent and no containing organic solvents. Method is realized by carrying out interaction of polyisocyanate in the presence of 0.5-3% of catalyst in reaction for formation of carbodiimide to form polycarbodiimide intermediate substance at 120-1800C for aliphatic polyisocyanate and at 80-1200C for aromatic polyisocyanate up to preparing 5-10% of NCO wherein polyisocyanate is represented by toluene-2,4-diisocyanate, toluene-2,6-diisocyanate or their mixture, diphenyl-4,4'-diisocyanate, 1,4-phenylenediisocyanate, dicyclohexylmethane-4,4'-diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate, 1,6-hexyldiisocyanate, 1,4-cyclohexyldiisocyanate, norbornyldiisocyanate or their mixture. Then method involves carrying out break and/or elongation of polycarbodiimide chain of intermediate substance by addition of equivalent compound comprising hydrophilic group and one or more amino- and/or hydroxyl functional groups during formation of polycarbodiimide intermediate substance or after formation of polycarbodiimide at temperature 70-1000C for aliphatic polycarbodiimide intermediate substance and at temperature 40-700C for aromatic polycarbodiimide intermediate substance. Then reaction in mixture is carried out up to disappearance of isocyanate functional group wherein a hydrophilic group-containing compound is represented by polyethoxymono- or diol, polyethoxy/polypropoxymono- or diol, polyethoxymono- or diamine, polyethoxy/polypropoxymono- or diamine, diol or diamine with polyalkoxy-containing by-side chain, hydroxy- or aminoalkylsulfonate, or dialkylaminoalkyl alcohol or -amine, or their mixture. Prepared compound is dispersed in water at temperature 40-1000C at pH 11-14 by addition of a base and/or buffer to water used for dispersing, and/or to prepared aqueous dispersion wherein a base is represented by alkaline metal hydroxide, such as lithium hydroxide, sodium hydroxide, potassium hydroxide, or trialkylamine, or trialkylamine containing hydroxy-groups, and wherein buffer is represented by usually used buffer with effective pH value 11-14. Polycarbodiimide dispersions prepared by above described method are stable for at least some weeks at temperature 500C. Also, invention describes a covering mixture comprising polycarbodiimide dispersions and solidified material prepared by applying abovementioned covering mixture on substrate and evaporation of water.

EFFECT: improved preparing method of dispersions.

3 cl, 2 tbl, 15 ex

 

The level of technology

Polycarbamide well - known cross-linking agents for aqueous resins containing carboxyl functional group. Most commercially available polycarbamide used as cross-linking agents, dissolved in organic solvents, which is a disadvantage because of their impact on the environment. Further, they must be mixed with water or with water and a surfactant before can be mixed with the aqueous resin. Basically, these aqueous dispersions are unstable and should be prepared daily. Only polycarbamide based on water tetramethyldisilane stable in water, as described in U.S. patent 568875 (= EP 0686626) and 5859166. However, the disadvantage of these polycarbamide is that the conditions for the formation of carbodiimides of tetramethyldisilane fairly extreme: this requires incubation at 180°C for 22 h and 2% catalyst the formation of carbodiimide. Further, polycarbamide based tetramethyldisilane are slower and less efficient cross-linking agents than cross-linking agents based on isophorondiisocyanate or 4,4'-dicyclohexylmethane.

Aqueous dispersion of polycarbamide obtained from isophorondiisocyanate and from 4,4'-dizick getselectedcount, as described in the U.S. patents 5856014, 5958516, 6127029 and 6127477 are unstable. The number of carbodiimide in commercial aqueous carbodiimide products (Carcodilites from Nasshinbo Industries) decrease in the test of stability at 50°within 6 weeks prior to 15-70% of the original values.

The purpose of the present invention is to provide a method of producing the product in which the above disadvantages will be missing.

Disclosure of inventions

In accordance with the present invention provides a method of preparing a stable aqueous polycarbamide dispersions for use as cross-linking agent, which do not contain organic solvents, characterized by:

- carry out reaction polyisocyanate in the presence of a catalyst to the formation of carbodiimide to form polycarbamide,

- breakage and/or elongation polycarbamide circuit by adding a compound containing a hydrophilic group and one or more amino and/or hydroxyl functional groups during or after the formation of polycarbamide,

by dispersing the compounds in water, where the pH is brought to values between 9 and 14 by adding a base or buffer to the water used for dispersion, and/or to the resulting aqueous dispersion. Alternative stable aq is e polycarbamide dispersion based on polyisocyanates can be obtained, when the introduction of end groups (capping), or lengthening the chain of a compound containing a hydrophilic group and one or more amine groups, is not carried out during or after the formation of polycarbamide, but occurs during or after dispersion of polycarbamide in the water.

Unexpectedly stability polycarbamide dispersion was significantly increased at higher pH values, and the concentration of the carbodiimide was reduced for 8 weeks at 50°C. Preferably, if at the end of the process the pH will be increased to values between 11 and 13.

Can be used a conventional catalyst for the formation of carbodiimide, as described in European patent 878496. It was unexpectedly found that the reaction temperature and the reaction time could be reduced when the catalyst was used 1-methylphosphono-1-oxide, and for this reason, this catalyst is preferred.

The polyisocyanate used to prepare polycarbamide is conventional polyisocyanate and can be toluene-2,4-diisocyanate, toluene-2,6-diisocyanate and mixtures thereof, difenilmetana-4,4-diisocyanate, 1,4-phenylendiamine, dicyclohexylmethane-4,4'-diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate, 1,6-hexyldecanol, 1,4-cyclohexyl-diisocyanate, norbornadiene or their mixture,and preferably dicyclohexylmethane-4,4'-diisocyanate.

Base that can be used to bring the pH can be an alkali metal hydroxide such as lithium hydroxide, sodium hydroxide, potassium hydroxide or trialkylamines, or trialkylamines containing hydroxyl functional groups. Optionally, the base or part of the Foundation can be included in policarbonato chain through the introduction of end groups in policarbonato circuit through dialkylaminoalkyl or alcohol, and/or by adding 0.01 to 0.3 equivalents relative to the diisocyanate containing tertiary amine polyol or polyamine during or after the formation of polycarbamide.

To maintain the pH value can be used as a buffer. Useful buffers are buffers with an effective pH range between 9 and 14.

Compounds containing a hydrophilic group and one or more amino and/or hydroxyl groups, are politoximaniac or diola, politicsi/polypropolene or diola, politoximaniac - or diamine, politicsi/polipropileno - or diamine, diola or diamine with polyalkoxy-side chain, hydroxy - or aminoalkylsilane, or dialkylaminoalkyl or-amine.

Polycarbamide dispersion of the invention can be used as cross-linking agents for resins containing carboxyl group, traditional of the time: prepared coating mixture, including polycarbamide dispersion of the invention and a hydrophilic resin containing carboxylic functional groups. Material utverjdayut by applying the coating mixture on the substrate, for example, leather or artificial leather, and evaporation of water. Can be represented numerous additional ingredients, such as fillers, dyes, pigments, silicones, surfactants and the like.

For some applications it is preferable that the distance between the carbodiimide groups in the molecule was increased. Thus, the cross-linking is less stringent coating will be more flexible, and can be overcome problems such as the appearance of a gray shade that is the fact that the coating becomes grayish and dull stretch, or can be warned of the fragility of the coating. Thus, carbodiimide circuit can be included flexible segments, such as "spacers"that separates the carbodiimide group. This purpose is added 0.01 to 0.3 equivalent (relative to polyisocyanat) mono - or polyol or a mono - or polyamine before, during or after the formation of polycarbamide, and the polyol or polyamine are, for example, mono - or polyhydroxyalkane, simple polyester mono - or polyol, challenging the polyester polyol, polycarbonate polyol, the floor is a caprolactam-polyol, mono - or polyamidoamine, prostin polyester mono - or polyamines.

Polycarbamide dispersions of the invention have several advantages:

the dispersions are stable, polycarbamide present as an aqueous dispersion and can be easily mixed with the aqueous resin containing carboxyl group, the products are free from solvent and any volatile organic vapors do not go during deposition of the formation of carbodiimide with 4,4'-dicyclohexylmethane (and isophorondiisocyanate) and 1-methylphosphono-1-oxide as catalyst for the formation of carbodiimide occurs in less extreme conditions than in the way diisocyanate described in U.S. patent 5688875 and 5859166.

Examples

Examples 1A-1F

Preparation of aqueous dispersions of polycarbamide based dicyclohexylmethane-4,4'-diisocyanate.

In nitrogen atmosphere 262 g dicyclohexylmethane-4,4'-diisocyanate (hereinafter called HMDI) and 4 g of 1-methylphosphono-1-oxide were heated with stirring to 140°and heating was continued up until the isocyanate content has not reached to 8.20%. Then the mixture was cooled to 90-100°C. the reaction Time was 8 hours Were added hydrophilic compounds, as indicated in table 1. When they were used in connection with a hydroxyl group was added to 0.01% (by weight)of the winner dibutylamine as a catalyst, and then the mixture continued to respond at 90-100°until then, until he disappeared NCO signal in the infrared spectrum. In the case of Example 1E through 1 h after start of the reaction was added aminecontaining compound. The mixture was cooled to 60-65°With and dispersed in water at 60-65°Since, when the quantity of solids to 35%. In the case of example 1F compound containing the amino group was added to the dispersion after, and the mixture was stirred for 10 minutes was added 10% solution of the base in water, as shown in table 1, up until the pH reached 11-12. The samples were tested for stability at 50°C. the Number of carbodiimide checked every two weeks. The products were stable for at least 8 weeks at 50°C.

Table 1
RoomHydrophilic compounds I and II with functional hydroxyl groupThe weight amount of the compounds I and II (g)The grounds used to bring the pH
1AM-PEG-350a)158,67sodium hydroxide
1BM-PEG-350158,67triethanolamine
1CM-PEG-350158,67ammonia
1DM-PEG-350 + DMEAb)79,33+20,17sodium hydroxide
1EM-PEG-350 + methoxyethylamine119,00+8,50sodium hydroxide
1FM-PEG-350 + Na-taurinec)79,33+33,32sodium hydroxide
a)M-PEG-350 is polyethoxyethanol with an average molecular weight 350

b)DMEA is a N-dimethylethanolamine

c)Na-taurine is a 2-aminomethanesulfonic sodium

Examples 2A-2G

Preparation of aqueous dispersions of polycarbamide based on HMDI.

Examples 1A-1F were repeated except that water was replaced with a buffer solution of 0.01 M of dinatriumfosfaatti. The samples were tested for stability at 50°C. Every 2 weeks check the number of carbodiimide. The products were stable for at least 8 weeks at 50°C.

Example 3

Preparation of aqueous dispersions of polycarbamide based on HMDI.

Example 1A was repeated except that 15 g of butanediol was added to the diisocyanate before was added the catalyst for the formation of carbodiimide. The reaction was continued up to how you received the content of the isocyanate 7,01 and the number of M-PEG was 148,61,

Example 4

Cooking is adnych dispersions of polycarbamide based on HMDI.

In nitrogen atmosphere 262 g of HMDI and 4 g of 1-methylphosphono-1-oxide were heated with stirring to 140°C, after which the heating was continued up until the isocyanate content reached 14,26%, after which the mixture was cooled to 90°C. Then there were added polyols, as indicated in table 2, plus a 0.01% (by weight) of the winner dibutylamine. Stirring was continued for 30 min at 90°and then was added 147 g M-PEG-350. Stirring was continued until, until he ceased to be NCO signal in the infrared spectrum. The mixture was cooled to 60-65°With and dispersed in water at 60-65°Since, when the quantity of solids to 40%. Next was added 10% NaOH solution in water, until the pH reached 11. The samples were subjected to test for stability, as mentioned above. The products were stable at least for 8 weeks at 50°C.

Table 2
RoomPolyolThe weight amount of the spacer (g)
4Aethylene glycol12,4
4B1,6-hexanediol23,6
4Ctriethylene glycol30,0
4DPPG-425a)85,0
a)PPG-425 is a propylene glycol with an average molecular weight 425

Example 5

Preparation of aqueous dispersions of polycarbamide based difenilmetana-4,4'-diisocyanate.

In a nitrogen atmosphere to 150 g difenilmetana-4,4'-diisocyanate and 140 g M-PEG-350 were heated to 80°C, the mixture was stirred for 60 min at 80°C. Was added 0.4 g of 1-methylphosphono-1-oxide, and heating with stirring was continued until, until he disappeared NCO signal in the infrared spectrum. The reaction time was 3 hours the Mixture was cooled to 60-65°was dispersible in water at 60-65°when the quantity of solids to 40%. Was added 5% 1 M solution of sodium carbonate in water, and the mixture was mixed to homogeneity, and then was added 10% sodium hydroxide solution in water up until the pH reached 11-12.

1. Method of preparation of stable aqueous dispersions of polycarbamide for use as cross-linking agent, which is free from organic solvents, characterized in that

spend the reaction of polyisocyanate in the presence of 0.5-3% of the catalyst for the formation of carbodiimide with education polycarbamide intermediate at 120-180°for aliphatic MDI and 80-120°for aromatic MDI, until then, until there is obtained if estvo NCO 5-10%, where the polyisocyanate is toluene-2,4-diisocyanate, toluene-2,6-diisocyanate and their mixtures, difenilmetana-4,4/-diisocyanate, 1,4-phenylendiamine, dicyclohexylmethane-4,4/-diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate, 1,6-hexyldecanol, 1,4-cyclohexyldiamine, norbornadiene or mixtures thereof;

spend breakage and/or lengthening the chain polycarbamide intermediate by adding equivalent relative to the remaining isocyanate functional group number of compounds containing a hydrophilic group and one or more amino and/or hydroxyl functional groups, while education polycarbamide intermediate or after the formation of polycarbamide at 70-100°for aliphatic polycarbamide intermediate and 40-70°for aromatic polycarbamide intermediate and conduct the reaction in the mixture until then, until there is no longer isocyanate functional group, where the compound containing a hydrophilic group, is politoximaniac or diola, politicsi/polypropolene or diola, politoximaniac - or diamine, politicsi/polipropileno - or diamine, diola or diamine with polyalkoxy side chain, hydroxy - or aminoalkylsilane, or dialkylaminoalkyl or an amine, or mixtures thereof;

dispersed the compound obtained in water at a temperature of 40-100°where pH increased to values between 11 and 14 by adding the base and/or buffer to the water used for dispersion, and/or to the resulting aqueous dispersion, where the base is a hydroxide of an alkali metal such as lithium hydroxide, sodium hydroxide, potassium hydroxide, or trialkylamines, or trialkylamines containing a hydroxy-group, and where the buffer is the most commonly used buffer with an effective pH range between 11 and 14.

2. The method according to claim 1, characterized in that the aforementioned breakage or elongation of the chain compound containing a hydrophilic group and one or more amino groups, occurs during or after dispersion of polycarbamide in water at a temperature of 20-100°C.

3. The method according to claims 1 and 2, characterized in that the aforementioned catalyst for the formation of carbodiimide is 1-methylphosphono-1-oxide.

4. The method according to claim 1, in which the preferred polyisocyanate is dicyclohexylmethane-4,4'-diisocyanate.

5. The method according to claim 1, characterized in that the said base or part of these grounds included in policarbonato chain through the introduction of end groups in the chain polycarbamide intermediate through dialkylaminoalkyl or alcohol, and/or by adding 0.01 to 0.3 equivalents relative from yannatou functional group-containing tertiary amine polyol or polyamine during or after the formation of polycarbamide.

6. The method according to claim 1, characterized in that 0.01 to 0.30 equivalents of mono - or polyol or a mono - or polyamine relative to the isocyanate functional groups are added up to, during, or after the formation of polycarbamide, and the polyol or polyamine are, for example, mono - or polyhydroxyalkane, simple polyester mono - or polyol, challenging the polyester polyol, polycarbonate polyol, polycaprolactone a polyol, a mono - or polyamidoamine, simple polyester mono - or polyamines.

7. The coating mixture containing polycarbamide dispersion obtained in accordance with claims 1 to 6 as a cross-linking agent, and an aqueous resin containing carboxyl functional group.

8. The cured material obtained by coating a mixture comprising polycarbamide dispersion obtained in accordance with claims 1 to 6, and the aqueous resin containing carboxylic functional groups on the substrate and evaporation of the water.



 

Same patents:

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SUBSTANCE: invention relates to process of producing elastomeric polyurethane material having Shore hardness up to 5 (DIN 53505), density 500 kg/m3 or higher (DIN 53420), compressive load (40%) deflection 600 kPa or less (DIN 53577), and elasticity 25% or less (ISO 8307). Process is accomplished by interaction of (i) polymethylene-polyphenylene-polyisocyanate with average isocyanate functionality 2.4 or more; (ii) polyol with average equivalent mass at least 500 and average nominal hydroxyl functionality 2-4; (iii) polyoxyalkylenemonool with nominal hydroxyl functionality 1 and average equivalent mass at least 500; and (iv) optional additives and auxiliary substances known per se in amount less than 5%. Reaction is carried out at index 90-110 and equivalent amount of polymer (iii) lies within a range of 25-80% based on accessible NCO equivalents. Elastomeric polyurethane material accordingly obtained is a soft gel-like material showing some degree of tackiness. Advantageously, this material is obtained using as little additives and auxiliary substances as possible, which results in reduced content of washed out products and residual reactive group in elastomeric polyurethane material. The latter can be employed in vehicle interior objects such as elbow-rests and instrumentation panels, in bicycle sittings, and in mouse tappets.

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1 tbl, 12 ex

FIELD: composite materials.

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11 cl, 7 tbl, 8 ex

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5 cl, 3 tbl

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15 cl, 12 tbl, 17 ex

FIELD: polymer materials.

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34 cl, 2 tbl, 10 ex

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6 cl, 1 tbl, 27 ex

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FIELD: building materials.

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6 cl, 1 tbl, 27 ex

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for preparing stable aqueous dispersions of polycarbodiimide for using as a cross-linking agent and no containing organic solvents. Method is realized by carrying out interaction of polyisocyanate in the presence of 0.5-3% of catalyst in reaction for formation of carbodiimide to form polycarbodiimide intermediate substance at 120-1800C for aliphatic polyisocyanate and at 80-1200C for aromatic polyisocyanate up to preparing 5-10% of NCO wherein polyisocyanate is represented by toluene-2,4-diisocyanate, toluene-2,6-diisocyanate or their mixture, diphenyl-4,4'-diisocyanate, 1,4-phenylenediisocyanate, dicyclohexylmethane-4,4'-diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate, 1,6-hexyldiisocyanate, 1,4-cyclohexyldiisocyanate, norbornyldiisocyanate or their mixture. Then method involves carrying out break and/or elongation of polycarbodiimide chain of intermediate substance by addition of equivalent compound comprising hydrophilic group and one or more amino- and/or hydroxyl functional groups during formation of polycarbodiimide intermediate substance or after formation of polycarbodiimide at temperature 70-1000C for aliphatic polycarbodiimide intermediate substance and at temperature 40-700C for aromatic polycarbodiimide intermediate substance. Then reaction in mixture is carried out up to disappearance of isocyanate functional group wherein a hydrophilic group-containing compound is represented by polyethoxymono- or diol, polyethoxy/polypropoxymono- or diol, polyethoxymono- or diamine, polyethoxy/polypropoxymono- or diamine, diol or diamine with polyalkoxy-containing by-side chain, hydroxy- or aminoalkylsulfonate, or dialkylaminoalkyl alcohol or -amine, or their mixture. Prepared compound is dispersed in water at temperature 40-1000C at pH 11-14 by addition of a base and/or buffer to water used for dispersing, and/or to prepared aqueous dispersion wherein a base is represented by alkaline metal hydroxide, such as lithium hydroxide, sodium hydroxide, potassium hydroxide, or trialkylamine, or trialkylamine containing hydroxy-groups, and wherein buffer is represented by usually used buffer with effective pH value 11-14. Polycarbodiimide dispersions prepared by above described method are stable for at least some weeks at temperature 500C. Also, invention describes a covering mixture comprising polycarbodiimide dispersions and solidified material prepared by applying abovementioned covering mixture on substrate and evaporation of water.

EFFECT: improved preparing method of dispersions.

3 cl, 2 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the method of obtaining diaminephenylmethane and its highest homologues by the condensation of aniline and formaldehyde in the presence of heterogeneous solid acid catalysts, which are characterised by the fact that the utilised catalysts are catalysts selected from (a) split zeolites and/or (b) alumo-silicate catalysts, which have the regulated hexagonal mesoporous structure with the size of 3-10nm.

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4 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention concerns polymer material displaying optically detectable response to load (pressure) change, including polyurethane elastomer adapted for load change detection, containing aliphatic diisocyanate, polyol with end hydroxyl, and photochemical system including fluorescent molecules for distance probing, modified and transformed into chain-extending diols, with molar diol to polyol ratio approximately within 10:1 to 1:2 range, and photochemical system selected out of group of exciplex and fluorescence resonance energy transfer (FRET) systems. The invention also concerns solution containing the said polymer material, and polymer material displaying detectable response to pressure change, including polyacryl or silicon elastomer and photochemical system including definite number of fluorescent molecules for distance probing, modified for penetration into the said elastomer, selected out of group including exciplex and fluorescence resonance energy transfer (FRET), and solution containing this polymer material. To eliminate oxygen sensitivity in pressure detection the material includes photochemical system selected out of group including exciplex and fluorescence resonance energy transfer (FRET). Systems including these photochemical systems enable fast response to pressure change; in addition, compression of material containing these systems is reversible, therefore elimination of oxygen influence on pressure change detection allows shorter response time and higher sensitivity when the claimed material is used.

EFFECT: increased material sensitivity to loads and reduced sensitivity to oxygen presence.

24 cl, 2 ex, 6 dwg

FIELD: chemistry.

SUBSTANCE: method involves: (1) reacting a mixture of polyisocyanate and 5-30 wt % mono- or polyisocyanate with a hydrophobic group at 120-180C in the presence of 0.5-5 wt % carbodiimide catalyst to form a polycarbodiimide containing isocyanate functional groups, with average number of carbodiimide functional groups equal to 1-10, in which the hydrophobic group is an alkyl containing 4-25 carbon atoms which, a fluorinated hydrocarbon, a silicon-containing hydrocarbon or an organosilicon polymer, (2) breaking and/or prolonging the chain from the polycarbodiimide containing isocyanate functional groups by adding a compound in amount of 0.1-1.0 equivalents with respect to content of isocyanate functional groups, where the said compound contains a hydrophilic group and one or more amine and/or hydroxyl functional group simultaneous or subsequent blocking of the remaining isocyanate functional group with a compound containing one or more amine and/or hydroxyl functional groups and, possibly, a hydrophobic group, where the hydrophobic group is an alkyl group containing 4-25 carbon atoms, a fluorinated hydrocarbon, a silicon-containing hydrocarbon or an organosilicon polymer, (3) dispersing the obtained compound in water, and (4) regulating pH of the formed dispersion to a value between 9 and 14 by adding to the obtained dispersion a hydroxide of an alkali metal or a buffer, where the buffer is effective at pH 9-14. The invention also relates to coating mixture containing polycarbodiimide dispersion prepared using the method described above, as well as a curable material obtained by applying said coating mixture onto a substrate.

EFFECT: meeting the requirement for low amount of hydrophilic material needed for dispersing polycarbodiimide, obtaining films or coatings which are less sensitive to water, more resistant to solvents and which have improved properties during attrition testing in wet state, and achieving high cross-link density of the polymer network.

21 cl, 38 ex, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining polycarbodiimides by two-stage polymerisation of at least one initial compound, containing isocyanate groups. In accordance with claimed method initial compound, containing isocyanate groups, is first, subjected to first polymerisation in substance mass in presence of catalyst (1), with obtaining first product of polymerisation; and (2) obtained at the process stage (1) first product of polymerisation is subjected to second polymerisation in solution. Invention relates to polycarbodiimides, obtained by claimed method.

EFFECT: method makes it possible to obtain polycarbodiimides with higher molecular weight and/or lower polydispersity.

10 cl, 5 dwg, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a composition which is suitable as an adhesion promoter for a coating agent based on plasticised polyvinyl chloride. The disclosed composition contains A) 15-50 wt % isocyanate group-containing isocyanurates and B) 50-85 wt % n- or isoalkyl monobenzoates, wherein i) the isocyanate group-containing isocyanurate is obtained via trimerisation of a mixture of 2,4-diisocyanatotoluene and 2,6-diisocyanatotoluene and ii) the sum of all weight percentages is 100%. The invention also relates to a method of producing said composition, use thereof as an adhesion promoter for a coating agent based on plasticised polyvinyl chloride and to a coating agent.

EFFECT: disclosed composition has good adhesion properties and does not contain phthalates which are hazardous for humans and bioaccumulative.

12 cl, 1 tbl, 7 ex

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