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High chemical resistance and high wear resistance coating based on polyurea elastomer and its preparation and use

A polyurea elastomer, chemical technology, applied in the field of high chemical resistance and high wear resistance coatings based on polyurea elastomer and its preparation and use, can solve the problem of no combination of high chemical resistance and high wear resistance, and achieve Good chemical resistance and high wear resistance, good resistance to organic solvent corrosion, good elasticity and wear resistance

Active Publication Date: 2020-06-19
NINGXIA NINGDONG RUIHUA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no coating product that combines high chemical resistance and high wear resistance, and it is urgent to develop

Method used

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  • High chemical resistance and high wear resistance coating based on polyurea elastomer and its preparation and use
  • High chemical resistance and high wear resistance coating based on polyurea elastomer and its preparation and use
  • High chemical resistance and high wear resistance coating based on polyurea elastomer and its preparation and use

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Effect test

Embodiment 1

[0037] The preparation method of the high chemical resistance and high wear resistance coating of the polyurea elastomer of the present embodiment is as follows:

[0038] The preparation method of the A component: add 1,5'-naphthalene diisocyanate prepolymer and dicyclohexylmethane diisocyanate prepolymer into a reaction kettle protected by nitrogen, and heat to 90-120°C under stirring, Vacuum at constant temperature to -0.09~-0.1MPa, dehydrate for 3 hours, lower the temperature to 50~60℃ under atmospheric pressure, add diphenylmethane diisocyanate, heat to 70~90℃ under nitrogen protection, react for 1~3 hours, cool down and stir Uniform discharge is A component;

[0039] The preparation method of the B component: first add the amino resin containing sterically hindered aliphatic secondary diamine into the reaction kettle, then add dimethylthiotoluenediamine and 15-30 parts of liquid polysulfide rubber under stirring After stirring at high speed for 0.5 to 1 hour, add 0 to 30...

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Abstract

The invention discloses a high chemical resistance and high wear resistance coating based on polyurea elastomer. The coating consists of an A component and a B component, wherein the A component comprises the following substances in parts by weight: 70 to 100 parts of methylene diphenyl diisocyanate, 50 to 70 parts of 1,5'-diisocyanato naphthalene prepolymer, 30 to 50 parts of dicyclohexylmethylmethane-4,4'-diisocyanate; the B component consists of the following substances in parts by weight: 50 to 70 parts of aliphatic series secondary amine resin with steric hindrance, 20 to 30 parts of DMTDA, 15 to 30 parts of liquid state polysulfide rubber and 0 to 30 parts of an optional pigment, wherein the molecular weight distribution of the 1,5'-diisocyanato naphthalene prepolymer is lower than 1.4, and the molecular weight distribution of the dicyclohexylmethylmethane-4,4'-diisocyanate is lower than 1.4. The coating has organic solvent corrosion resistance, and also has preferable elasticityand abrasive resistance.

Description

technical field [0001] The invention relates to a coating with high chemical resistance and high abrasion resistance and its preparation and application method, in particular to a polyurea elastomer-based coating with high chemical resistance and abrasion resistance and its preparation and application method. Background technique [0002] Due to its excellent performance, metal is widely used in pipeline transportation fields such as petroleum, chemical industry, pipeline, and marine engineering. However, most metal pipelines are corroded due to the transportation of corrosive media, which is easy to cause serious leakage. Therefore, various types of pipelines are often used. The anti-corrosion material is made into a covering layer or a lining to completely isolate the metal pipe from the corrosive medium, prevent corrosion and abrasion of the equipment, improve the corrosion resistance, wear resistance, safety and prolong the service life of the equipment. [0003] Polyure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C09D181/04C09D5/08C09D7/61C08G18/65C08G18/64C08G18/32B05D5/08
CPCB05D5/08C08G18/3868C08G18/6415C08G18/6529C08K2003/265C09D5/08C09D175/02C08L81/04C08K3/26
Inventor 鄂昱茜
Owner NINGXIA NINGDONG RUIHUA NEW MATERIAL TECH CO LTD
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