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Organic silicon modified PAE polyurea coating

A silicone and modified technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of poor high temperature resistance, short construction time, low temperature embrittlement, etc., and achieve high temperature resistance coating strength, Improved anti-corrosion performance and complete resin protection

Active Publication Date: 2021-12-31
浙江艾特普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the defects of short construction time, poor leveling, poor high-temperature resistance strength, and low-temperature embrittlement in the reaction of existing polyaspartic acid esters with aliphatic isocyanates, which are not conducive to the use of coatings, and provide a A silicone-modified PAE polyurea coating, which introduces polysiloxane groups on the side chains of polyaspartic acid ester and isocyanate curing agent, can obtain good leveling, high corrosion resistance, high temperature resistance and coating strength High PAE polyurea coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A silicone modified PAE polyurea coating, comprising A component and B component that the mass ratio is 2:1;

[0036] A component is silicone modified polyaspartic acid ester, and its preparation method is:

[0037] (1) Mix allyl glycidyl ether after dehydration with heptamethyltrisiloxane in a molar ratio of 1.1:1, add 8 ppm chloroplatinic acid catalyst, and react at 120° C. for 2 hours to obtain epoxy silicone oil;

[0038] (2) Add epoxy silicone oil dropwise to maleic anhydride at 60°C, control the dropping time for 1h, and the molar ratio of epoxy silicone oil to maleic anhydride is 2.1:1; Obtain dipolysiloxane maleate;

[0039] (3) Add 4,4'-diaminodicyclohexylmethane to dipolysiloxane maleate, the mole of 4,4'-diaminodicyclohexylmethane to dipolysiloxane maleate The ratio is 1:2.1; and a sodium methoxide catalyst with a total mass of 0.03% of reactants is added, and reacted at 60° C. for 10 h under nitrogen protection to obtain the silicone-modified polyaspartic ...

Embodiment 2

[0045] A silicone modified PAE polyurea coating, comprising A component and B component that the mass ratio is 2.1:1;

[0046] A component is silicone modified polyaspartic acid ester, and its preparation method is:

[0047] (1) Mix allyl alcohol after dehydration with heptamethyltrisiloxane in a molar ratio of 1:1, add 4ppm chloroplatinic acid catalyst, and react at 90°C for 4h to obtain hydroxylated silicone oil;

[0048] (2) Add hydroxylated silicone oil and dimethyl maleate with a molar ratio of 2:1 to xylene, react at 150° C. for 4 hours, and remove the solvent under reduced pressure to obtain dipolysiloxane maleate;

[0049] (3) Add IPDA to dipolysiloxane maleate, the molar ratio of IPDA to dipolysiloxane maleate is 1:2; React at 40° C. for 12 hours under protection to obtain the organosilicon-modified polyaspartic acid ester.

[0050] B component is polyisocyanate silicone oil curing agent, its preparation method is:

[0051] A) Mix dehydrated 1,4-dichloro-2-butene a...

Embodiment 3

[0055] A silicone modified PAE polyurea coating, comprising A component and B component with a mass ratio of 2.2:1;

[0056] A component is silicone modified polyaspartic acid ester, and its preparation method is:

[0057] (1) Mix the dehydrated hydroxyethyl acrylate and heptamethyltrisiloxane at a molar ratio of 1:1.2, add 10 ppm of chloroplatinic acid catalyst, and react at 150° C. for 1 hour to obtain hydroxylated silicone oil;

[0058] (2) Esterify hydroxylated silicone oil and maleic anhydride at 135°C for 4 hours, the molar ratio of hydroxylated silicone oil to maleic anhydride is 2.2:1; obtain dipolysiloxane maleate;

[0059] (3) Add menthane diamine to dipolysiloxane maleate, the molar ratio of menthane diamine to dipolysiloxane maleate is 1:2.2; and add 0.1% of the total mass of reactants sodium methoxide catalyst, reacted at 80° C. for 8 hours under the protection of nitrogen to obtain the organosilicon-modified polyaspartic acid ester.

[0060] B component is poly...

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PUM

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Abstract

The invention discloses an organic silicon modified PAE polyurea coating which comprises a component A and a component B. The preparation method of organic silicon modified polyaspartic acid ester in the component A comprises the following steps: reacting vinyl alcohol or a vinyl epoxy compound with end hydrogen-containing silicone oil to obtain functionalized silicone oil; reacting the functionalized silicone oil with dialkyl maleate or maleic anhydride to obtain dipolysiloxane maleate; and reacting maleic acid dipolysiloxane ester with aliphatic binary primary amine. The preparation method of the isocyanate silicone oil curing agent in the component B comprises the following steps: reacting vinyl dihalide or a polyhalogen compound with hydrogen-containing silicone oil to obtain polyhalogenated silicone oil; reacting the polyhalogenated silicone oil with phthalimide salt, and then heating and hydrazinolysis to obtain polyamino silicone oil; and dropwise adding trichloromethyl chloroformate into the polyamino silicon oil, and irradiating with an incandescent lamp for reaction. According to the invention, polysiloxane is respectively introduced into side chains of the component A and the component B, so that the PAE polyurea coating with good leveling property, high corrosion resistance, high temperature resistance and high coating strength can be obtained.

Description

technical field [0001] The invention relates to the technical field of polymer coatings, in particular to an organosilicon-modified PAE polyurea coating. Background technique [0002] The polyaspartic ester polyurea (PAE polyurea) coating prepared by polyaspartic acid ester resin and aliphatic isocyanate curing agent has lower viscosity and higher solid content (greater than 90%), so it has a relatively Low VOC emissions, and the coating can obtain the required film thickness after one application, which improves work efficiency, not only protects the environment, but also saves energy. The coating can be formed into a film at room temperature, and the coating film has excellent weather resistance, which is close to the UV resistance of fluorocarbon coatings, far exceeding the traditional acrylic polyurethane (PU) coatings; in addition, it also has good wear resistance . Therefore, the coating has broad application prospects in the fields of heavy-duty anti-corrosion coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/08C08G18/64
CPCC09D175/02C09D5/08C08G18/6438
Inventor 卢鹏飞徐轶张永军夏杰鲁利华史忠朱雨蓉
Owner 浙江艾特普科技有限公司
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