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Polyacyl urea elastomer and preparation method and application thereof

A polyurea and elastomer technology, applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesive types, etc., can solve the problem of isocyanate group water vapor sensitivity, free isocyanate monomer residual toxicity, etc. problem, achieve the effect of reducing energy use and shortening production time

Active Publication Date: 2019-05-14
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems that isocyanate groups are sensitive to water vapor and the residual toxicity of free isocyanate monomers in the preparation process of polyurethane elastomers, and provide a polyurea elastomer and its preparation method

Method used

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  • Polyacyl urea elastomer and preparation method and application thereof
  • Polyacyl urea elastomer and preparation method and application thereof

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preparation example Construction

[0019] The first aspect of the present invention provides a kind of preparation method of polyurea elastomer, and this preparation method comprises: Polycarbodiimide, the polymer containing at least two acidic functional groups and optional chain extender, plasticizer , the catalyst and the solvent are uniformly mixed; then, curing is carried out to obtain the polyurea elastomer.

[0020] A polyacylurea is a polymer composed of acylurea linkages. It is obtained by reacting carbodiimide groups with carboxyl groups. The present invention uses isocyanate and its derivatives as the source of polycarbodiimide reactants, and in the presence of a catalyst, carbon dioxide is removed, NCO is converted into NCN, and then combined with polymers / chain extenders containing at least two acidic functional groups, etc. Cross-linking or chain extension. The generated acyl urea bonds are similar in structure to urethane bonds and amide bonds, have strong polarity, and are easy to form strong ...

Embodiment 1

[0051] Take 11.5 parts of polycarbodiimide in a three-necked bottle, add 5.3 parts of 150# solvent oil, and stir at room temperature for 2 hours; take 4 parts of dimer fatty acid (weight average molecular weight is 560), catalyst dibutyltin dilaurate 0.02 part , added to the polycarbodiimide solution under vigorous stirring, and continued to stir for 10 minutes. Pour it into the mold, and maintain it for 7 days under the standard environment of 23±2°C and humidity of 50±10%. Unmold and test.

[0052] Wherein, the polycarbodiimide is prepared by condensation reaction of toluene diisocyanate under the catalysis of organic phosphine, and is terminated with monocyanate; the weight average molecular weight of the polycarbodiimide is 1704.

Embodiment 2

[0054] Get 18.4 parts of polycarbodiimide in a three-necked bottle, add 5.3 parts of 150# solvent oil, 1 part of diisononyl phthalate (DINP), stir at normal temperature for 2 hours, add dimer fatty acid (weight average molecular weight 8 parts of 560), 1 part of trimerized fatty acid (weight average molecular weight is 900), 15 parts of No. 52 chlorinated paraffin, 6 parts of 150# solvent oil, and continued to stir for 10 minutes under strong stirring. Pour it into the mold, and maintain it for 7 days under the standard environment of 23±2°C and humidity of 50±10%. Unmold and test.

[0055] Wherein, the polycarbodiimide is prepared by the condensation reaction of diphenylmethane diisocyanate under the catalysis of an organic phosphine, and is terminated with a monocyanate; the weight average molecular weight of the polycarbodiimide is 1360.

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Abstract

The invention discloses a polyacyl urea elastomer and a preparation method and applications thereof. The preparation method of the polyacyl urea elastomer includes the steps of uniformly mixing polycarbodiimide, a polymer containing at least two acidic functional groups, and optional chain extenders, plasticizers, catalysts, and solvents, and then conducting curing to obtain the polyacyl urea elastomer. The polyacyl urea elastomer has the advantages of effectively solving the sensitivity problem of water vapor in the preparation, application and construction process of polyurethane materials,and also solving the hazards of free isocyanate with the free isocyanate not contained in the polyacyl urea elastomer.

Description

technical field [0001] The invention belongs to the technical field of elastomer materials, and more specifically relates to a polyurea elastomer and its preparation method and application. Background technique [0002] It has been more than 80 years since Otto Bayer first synthesized polyurethane materials in 1937. Polyurethane products (elastomers and foams) entered the market in the late 1940s and quickly gained a place in the market due to their excellent performance. As an important member of the plastic family, polyurethane plastics have been widely used in various engineering fields, including chemical, electronic, construction, textile, automotive, medical, national defense, aerospace and other fields. Compared with other polymer materials, the performance of polyurethane materials can be adjusted to a great extent by choosing different raw materials, catalysts, additives, or different molding processing and post-treatment methods. The principle is that during the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L91/06C08L91/00C08K5/12C09D175/04C09D191/00C09D191/06C09D7/63C09J175/04C09J191/00C09J191/06C09J11/06C08G18/79C08G18/02C08G18/34C08G18/69C08G18/62
Inventor 牟辰中李红英王新锋段文锋
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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