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A kind of preparation method of unsaturated polyester furniture coating

A furniture coating, unsaturated technology, applied in the direction of polyurea/polyurethane coating, coating, etc., can solve the problems of low hardness, poor air drying, poor impact resistance, etc.

Active Publication Date: 2019-04-19
大一(云浮)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simple unsaturated polyester furniture coatings have disadvantages such as poor air drying, low hardness, poor impact resistance, easy cracking on the surface, and large curing shrinkage (even reaching 6% to 10%), which greatly limits its application.

Method used

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  • A kind of preparation method of unsaturated polyester furniture coating
  • A kind of preparation method of unsaturated polyester furniture coating
  • A kind of preparation method of unsaturated polyester furniture coating

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] A kind of preparation method of unsaturated polyester furniture coating of the present invention comprises the following concrete steps:

[0031] (1) Preparation of unsaturated polyurethane (UP)

[0032] a. Heat a certain amount of saturated and unsaturated dicarboxylic acids or anhydrides, a small amount of rosin, a catalyst, and an oil bath until the reaction materials are completely dissolved, then start stirring, and raise the temperature to 210-260°C, keep it warm for 20-45min, until the acid value Reduced to 5mgKOH / g-10mgKOH / g, modified rosin;

[0033] b. Then lower the temperature to 140-180°C, and start to add 40%-60% of the total amount of diol dropwise. After the dropwise addition, raise the temperature to 170-190°C to continue the reaction, and take a sample every 1h to measure the acid value. When the change range of the acid value decreases, lower the temperature to 160°C and add the remaining glycol at one time, and then continue to heat up to 190-210°C f...

Embodiment 1

[0043] A kind of preparation of unsaturated polyester furniture coating, prepares according to following steps:

[0044] (1) Heat saturated and unsaturated dibasic carboxylic acids or dibasic acid anhydrides, a small amount of rosin, a catalyst, and an oil bath until the reaction raw materials are completely dissolved, then start stirring, and raise the temperature to 230°C, keep the temperature for 30min, then cool down to 180°C, press Proportionally add 40% glycol, start stirring, heat up to 190°C and continue to react until the acid value change range decreases, then cool down to 160°C and add the remaining glycol at one time, then continue to heat up to 190°C for 3 hours, Then lower the temperature to 100°C, add the polymerization inhibitor hydroquinone and stir thoroughly, then cool down to 80°C and then add styrene to adjust the viscosity, that is, the UP oligomer with terminal hydroxyl group (rosin modified HO—UP—OH oligomer substance solution);

[0045] The ratio of e...

Embodiment 2

[0049] A kind of preparation of unsaturated polyester furniture coating, prepares according to following steps:

[0050](1) Heat saturated and unsaturated dibasic carboxylic acids or dibasic acid anhydrides, a small amount of rosin, a catalyst, and an oil bath until the reaction raw materials are completely dissolved, then start stirring, and raise the temperature to 210°C, keep the temperature for 45min, then cool down to 160°C, press Proportionally add 50% diol, start stirring, heat up to 170°C and continue to react until the acid value change range decreases, then cool down to 160°C and add the remaining diol at one time, then continue to heat up to 200°C for 2 hours, Then lower the temperature to 100°C, add the polymerization inhibitor hydroquinone and stir thoroughly, then cool down to 80°C and then add styrene to adjust the viscosity, that is, the UP oligomer with terminal hydroxyl group (rosin modified HO—UP—OH oligomer substance solution);

[0051] The ratio of each r...

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Abstract

The invention discloses a preparation method of an unsaturated polyester furniture coating. Rosin is modified and then polymerized with diol, hydroxyl-terminated unsaturated polyurethane is prepared and copolymerized with isocyanate, an epoxy PU / UP prepolymer is generated, and the unsaturated polyester furniture coating is prepared from the epoxy PU / UP prepolymer and other components. In order to improve characteristics of the furniture coating, different types of polyester polyol are prepared through modification of natural rosin and applied to synthesis and modification of polyurethane resin, the performance of the polyurethane resin is improved effectively through introduction of the specific molecular structure of rosin into the polyurethane resin, sharp deterioration of mechanical properties due to the molecular weight of unsaturated polyester is reduced by means of a chemical reaction between a terminal hydroxyl group and isocyanate, and the furniture coating has the properties of being good in glossiness, high in film hardness, good in adhesion, good in flexibility, impact-resistant and the like.

Description

【Technical field】 [0001] The invention relates to a preparation method of an unsaturated polyester furniture coating, which belongs to the technical field of furniture coatings. 【Background technique】 [0002] With the continuous advancement of human society and the advancement of science and technology, especially with the rapid development of the synthetic resin industry, people have higher and higher requirements for furniture coatings. The zero VOC and pollution-free unsaturated polyester paint has become one of the development trends of furniture coatings. Simple unsaturated polyester furniture coatings have disadvantages such as poor air drying, low hardness, poor impact resistance, easy cracking on the surface, and large cure shrinkage (even reaching 6% to 10%), which greatly limits its application. In the past, people mixed two or more resins with complementary characteristics through simple physical methods; or made products have the characteristics of two or more ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D7/63C08G18/68C08G18/58C08G63/52
CPCC08G18/58C08G18/683C08G63/52C09D7/63C09D175/14
Inventor 林跃华龙清平聂建华韩淑琴李平辉徐春涛
Owner 大一(云浮)新材料科技有限公司
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