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Reversible repair composition, preparation method thereof, varnish composition and self-repairing coating material

A composition and reversible technology, applied in coatings, polyurea/polyurethane coatings, layered products, etc., can solve the problems of poor scratch resistance, self-healing performance, and poor UV radiation resistance, and achieve scratch resistance Excellent, good UV radiation resistance, excellent self-healing performance

Inactive Publication Date: 2010-03-17
广西荷美新能源车辆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of poor UV radiation resistance or poor scratch resistance and self-repairing performance of self-repairing coating materials in the prior art, and provide a kind of UV radiation resistance, scratch resistance and self-repairing performance. Reversible repair composition with excellent repair performance, preparation method thereof, varnish composition containing the reversible repair composition, and self-repair coating material using the varnish composition

Method used

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  • Reversible repair composition, preparation method thereof, varnish composition and self-repairing coating material
  • Reversible repair composition, preparation method thereof, varnish composition and self-repairing coating material
  • Reversible repair composition, preparation method thereof, varnish composition and self-repairing coating material

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preparation example Construction

[0034] The present invention also provides a preparation method of the reversible restoration composition, the method comprising: under esterification reaction conditions, carrying out esterification reaction with aliphatic and / or aromatic diisocyanate and organic dihydric alcohol, and combining the obtained reaction product with The alcoholic hydroxyl-containing polyacrylate and the alcoholic hydroxyl-containing polyester undergo esterification reaction under the esterification reaction conditions in the presence of a catalyst.

[0035] In the method, the conditions of the esterification reaction of aliphatic and / or aromatic diisocyanate and organic dibasic alcohol include that the molar ratio of aliphatic and / or aromatic diisocyanate and organic dibasic alcohol can be 1.5- 3:1, the reaction temperature can be 160-180°C, and the reaction time can be 6-8 hours.

[0036] The esterification reaction product of aliphatic and / or aromatic diisocyanate and organic dihydric alcohol, ...

Embodiment 1

[0073] This example is used to illustrate the reversible repair composition, varnish composition and self-repair coating material provided by the present invention and the manufacturing method thereof.

[0074] (1) Preparation of reversible repair composition

[0075] In a 2-liter three-necked flask with a stirring device, at a stirring speed of 1000 rpm, 10 moles of methyl diisocyanate (produced by Tianjin Madison Chemical Industry Co., Ltd.) and 4 moles of 1,10-decanediol (produced by Shantou, Guangdong) City Xilong Chemical Factory) and 4.5 moles of propylene glycol methyl ether acetate (Guangdong Guanghua Chemical Factory Co., Ltd.) carried out esterification reaction at 160 ° C for 8 hours to generate polyurethane with -NCO at both ends (through gel permeation chromatography The degree of polymerization recorded by the method is 10); then, 1 mole of ethylene terephthalate (Beijing Hengye COSCO Chemical Co., Ltd.), 2 moles of polyhydroxypropyl methacrylate (Beijing Hengye ...

Embodiment 2

[0082] This example is used to illustrate the reversible repairing composition provided by the present invention and its preparation method, as well as the varnish composition and self-repairing coating material provided by the present invention and its manufacturing method.

[0083] (1) Preparation of reversible repair composition

[0084] In a 2-liter three-neck flask with a stirring device, at a stirring speed of 1000 rpm, 9 moles of ethyl diisocyanate (produced by Tianjin Madison Chemical Industry Co., Ltd.), 3 moles of 1,7-heptanediol (Beijing Heng Industry COSCO Chemical Co., Ltd.), 3 moles of butyl acetate (Guangdong Guanghua Chemical Factory Co., Ltd.) and 3 moles of diacetone alcohol (Guangdong Guanghua Chemical Factory Co., Ltd.) at 165 ° C for 7.5 hours to generate two ends Polyurethane with -NCO (the degree of polymerization measured by gel permeation chromatography is 7); then, 1 mole of poly-1,7-heptanediol terephthalate (Beijing Hengye COSCO Chemical Co., Ltd.,...

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Abstract

The invention provides a reversible repair composition. The reversible repair composition at least contains a reversible repair polymer containing a polyester structural unit, a polyurethane structural unit and a polyacrylate structural unit. The invention also provides a method for preparing the reversible repair composition. The invention also provides a varnish composition containing the reversible repair composition and a self-repairing coating material obtained by solidifying the varnish composition. The self-repairing coating material has excellent scratch resisting, UV radiation resisting and self-repairing properties.

Description

technical field [0001] The invention relates to a reversible repair composition, a preparation method of the reversible repair composition, a varnish composition containing the reversible repair composition, and a self-repair coating material using the varnish composition. Background technique [0002] Due to the influence of the surrounding environment in use, traditional coatings will inevitably produce cracks and local damage, which will affect the appearance of the coating and shorten the service life. Therefore, the damaged coating must be repaired. However, only passive repair methods can no longer meet the requirements of modern multifunctional coating materials. It has become a development trend in the field of coating materials to develop coatings that can return to their original state after cracks or local damage without external influence. [0003] The existing varnish composition applied to reversible repairing coating materials contains polyurethane polyester ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08G18/40C08G18/42C08G18/62C09D175/04B32B33/00
Inventor 沙明杰陈云陈梁
Owner 广西荷美新能源车辆科技有限公司
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