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End-amido polyaspartic ester and method of manufacturing the same

A technology of polyaspartic acid ester and manufacturing method, applied in the field of amino-terminated polyaspartic acid ester and its manufacture, and manufacture of components for spraying polyurea type coatings, can solve the problem of polyurea materials without mentioning gel time Elongation at break physical properties and other issues

Inactive Publication Date: 2009-09-09
上海市涂料研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials used are all small molecular amine molecules, and the application of polyoxypropylene polyamine or polyoxyethylene polyamine in the synthesis of polyaspartic acid ester is not mentioned, and the polyoxyethylene polyamine prepared by this method is not mentioned. Physical properties such as the gel time of the aspartate mixture and isocyanate during the reaction and the elongation at break of the polyurea material produced

Method used

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  • End-amido polyaspartic ester and method of manufacturing the same
  • End-amido polyaspartic ester and method of manufacturing the same
  • End-amido polyaspartic ester and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The three-necked flask was equipped with a stirrer, a heater, an addition funnel and a nitrogen inlet. 73.3 grams (0.700 equivalents) of 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane was put into the flask, and under the protection of nitrogen, it was added to the flask through the addition funnel within 1 hour. 446.9 grams (1.96 equivalents) of dibutyl maleate. Due to the exotherm of the reaction, the temperature of the reaction mixture rose to 40 °C, after which the temperature was maintained at 60 °C for 7 hours, at which time 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane had 100% conversion For polyaspartic acid ester. This mixture was added to a reaction bottle containing 144.9 grams of D-230 (1.26 equivalents) within 45 minutes, and the reaction was heated to 60°C for 12 hours, at which time 90% had been converted into polyaspartic acid ester, one month Afterwards, the reaction was 100% complete.

Embodiment 2

[0024]The three-necked flask was equipped with a stirrer, a heater, an addition funnel and a nitrogen inlet. 86.87 grams (0.730 equivalents) of 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane was put into the flask, and under the protection of nitrogen, it was added to the flask through the addition funnel within 1 hour. 499.3 grams (2.19 equivalents) of dibutyl maleate. Due to the exotherm of the reaction, the temperature of the reaction mixture rose to 40 °C, after which the temperature was maintained at 60 °C for 7 hours, at which time 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane had 100% conversion For polyaspartic acid ester. This mixture was added to a reaction bottle containing 229.9 grams of T-403 (1.46 equivalents) within 45 minutes, and the reaction was heated to 70°C for 12 hours, at which time 90% had been converted into polyaspartic acid ester, one month The post reaction was 100% complete.

Embodiment 3

[0026] The three-necked flask was equipped with a stirrer, a heater, an addition funnel and a nitrogen inlet. 90.57 grams (0.761 equivalents) of 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane was put into the flask, and under the protection of nitrogen, it was added to the flask through the addition funnel within 1 hour. 542.64 grams (2.38 equivalents) of dibutyl maleate. Due to the exotherm of the reaction, the temperature of the reaction mixture rose to 40 °C, after which the temperature was maintained at 60 °C for 7 hours, at which time 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane had 100% conversion For polyaspartic acid ester. This mixture was added to a reaction bottle containing 323.8 grams of D-400 (1.62 equivalents) within 45 minutes, and the reaction was heated to 70°C for 12 hours, at which time 90% had been converted into polyaspartic acid ester, one month The post reaction was 100% complete.

[0027] The reactivity presented by the polyaspartic acid ester obtai...

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Abstract

An amino-terminated polyether-type polyaspartate is characterized in that it is made by a two-step process: (1) reacting a small molecular amine with an excess of dicarboxylic acid ester to generate A mixture of aspartic acid ester and residual unreacted dicarboxylic acid ester due to excess; (2) adding the mixture obtained in the above step (1) dropwise to polyalkylene ether polyamine to obtain the final product through catalytic reaction ——Amino-terminated polyether polyaspartate. The polyurea coating formulated with this polyether polyaspartate has the advantages of long gel time, easy operation, and good elasticity of the paint film.

Description

technical field [0001] The present invention relates to a component for producing polyurethane coating and its production method, in particular to a component for producing spray polyurea coating, ie amino-terminated polyaspartic acid ester and its production method. Background technique [0002] Polyisocyanate components and isocyanate-reactive amine components can be used to make coatings with various properties. Such compositions can form high-quality coatings that can have various properties such as rigidity, elasticity, corrosion resistance, solvent resistance, and UV resistance. However, the reactivity of the traditional amino-terminated polyether and polyisocyanate is too high, and the operation is difficult, so a special two-component high-pressure collision spray gun must be used for construction. Polyaspartic acid esters developed in recent years have the following structure: [0003] [0004] Because the nitrogen atom in the molecular structure is affected by...

Claims

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Application Information

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IPC IPC(8): C09D175/02
Inventor 孙凌葛亮
Owner 上海市涂料研究所有限公司
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