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Low-reactivity polyaspartic acid ester resin and preparation method thereof, and coating and preparation method thereof

An aspartate, reactive technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of low reactivity and product performance, difficult to balance and other problems, achieve excellent application effect, wide application field, preparation Simple and controllable process

Pending Publication Date: 2022-07-29
SHENZHEN FEIYANG JUNYAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to improve the low reactivity of polyaspartic acid ester resin and the problem that product performance is difficult to balance, this application provides a kind of low reactivity polyaspartic acid ester resin and its preparation method, coating and preparation method

Method used

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  • Low-reactivity polyaspartic acid ester resin and preparation method thereof, and coating and preparation method thereof
  • Low-reactivity polyaspartic acid ester resin and preparation method thereof, and coating and preparation method thereof
  • Low-reactivity polyaspartic acid ester resin and preparation method thereof, and coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Add 210g (1mol) H-7011 (2,2'-diaminodicyclohexylmethane content is 35%; 2,4'-diaminodicyclohexylmethane content is 65%; molar mass is 210) into the reaction vessel , 344g (2mol) of diethyl maleate was added dropwise to H-7011, and the temperature of the dropwise addition was controlled not to be higher than 60°C. Under the conditions of 130°C and vacuum degree higher than -0.098MPa, it was purified by negative pressure distillation in a thin film evaporator, then cooled to 50°C and filtered to obtain 548.5g of polyaspartate resin with a yield of 99% and a molecular weight of 554. , the active hydrogen equivalent is 277;

[0088] The 1H-NMR spectrum, 13C-NMR spectrum, MS(ES+) spectrum and MS(ES-) spectrum of the prepared polyaspartate resin are shown in Figure 1 to Figure 4 ;

[0089] The obtained polyaspartate resin is a mixture of substances represented by structural formula (3) and structural formula (4):

[0090]

[0091] The content of structural formula (3) ...

Embodiment 2

[0093] The difference with Example 1 is that diethyl maleate was replaced with equimolar di-n-butyl maleate 456g (2mol), and the rectification and purification temperature was 140° C. to obtain polyaspartate resin 659g, The yield is 99%, the molecular weight is 666, and the active hydrogen equivalent is 333;

[0094] The obtained polyaspartate resin is a mixture of substances represented by structural formula (5) and structural formula (6):

[0095]

[0096] Wherein, the content of structural formula (5) is 35%, and the content of structural formula (6) is 65%.

Embodiment 3

[0098] The difference with Example 1 is that the consumption of diethyl maleate is 516g (3mol), that is, the mol ratio of H-7011 and diethyl maleate is 1:3, to obtain polyaspartate resin 549.3 g, the yield is 75.7%, and its molecular weight, active hydrogen equivalent and molecular structure are the same as those in Example 1.

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Abstract

The invention relates to the field of polyaspartic acid ester resins and coatings thereof, and particularly discloses a low-reactivity polyaspartic acid ester resin and a preparation method thereof, and a coating and a preparation method thereof. The preparation method of the low-reactivity polyaspartic acid ester resin comprises the following steps: uniformly mixing 2, 4 '-diaminodicyclohexylmethane and 2, 2'-diaminodicyclohexylmethane to obtain a mixture, and carrying out Michael addition reaction on the mixture and diester maleate to obtain the polyaspartic acid ester resin. The polyaspartic acid ester resin prepared by the invention not only has low reaction activity, but also has the characteristics of high strength, high weather resistance, low viscosity, high solid content and low VOC (volatile organic compound) emission.

Description

technical field [0001] The present application relates to the field of polyaspartate, and more particularly, to a low-reactivity polyaspartate resin and its preparation method, coating and preparation method. Background technique [0002] Polyurea waterproof coatings, polyurea anti-corrosion coatings, polyurea adhesives, etc. are polyaspartate coatings formed by the reaction of polyaspartate resin and isocyanate curing agent. [0003] The most commonly used polyaspartate resin is prepared by reacting 4,4'-diaminodicyclohexylmethane with diethyl maleate, and its structural formula is: [0004] [0005] The secondary amine group in the polyaspartate resin structure is connected to the 4,4' positions of the two C six-membered rings, and the activity of the secondary amine group of the reactive group is mainly provided by the branched chain of the C4 diester. The influence of the steric hindrance effect, the C six-membered ring has less influence on the secondary amine group...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/64C09D175/02
CPCC08G18/6415C09D175/02
Inventor 谢夏陆车琳娜朱龙晖梁平陈注邱小勇
Owner SHENZHEN FEIYANG JUNYAN TECH DEV
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