Vinyl monomer-modified polyester resin and anti-shrinking agent, and preparation methods thereof

A vinyl monomer and modified polyester technology, applied in the field of vinyl monomer modified polyester resin, low shrinkage agent and preparation, can solve poor stability, weak thickening ability, low shrinkage agent coloring performance To achieve the effect of widening the selection range, improving colorability, excellent mechanical properties and moisture resistance

Active Publication Date: 2018-09-07
CHANGZHOU HUAKE POLYMERS
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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 solve the defects of poor coloring performance, weak thickening ability and poor stability of existing low-shrinkage agents, and provide a vinyl monomer modified polyester resin, low-shrinkage agent and its preparation method

Method used

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  • Vinyl monomer-modified polyester resin and anti-shrinking agent, and preparation methods thereof
  • Vinyl monomer-modified polyester resin and anti-shrinking agent, and preparation methods thereof
  • Vinyl monomer-modified polyester resin and anti-shrinking agent, and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A vinyl monomer-modified polyester resin and a low-shrinkage agent are prepared according to the following raw material formula and preparation method.

[0051] The formula is:

[0052]

[0053] The preparation method steps are as follows:

[0054] (1) Add polyhydric alcohol into the reaction kettle with heating device and stirring device, feed nitrogen, start stirring, heat up to 100°C until the material melts, then add saturated polybasic acid or acid anhydride, unsaturated polybasic acid or acid anhydride in sequence And the esterification catalyst, continue to heat up the water outlet under the protection of nitrogen, the distillation head temperature is 90 °C, the reaction temperature is 200 °C, and the acid value is 8 mgKOH / g;

[0055] (2) Then lower the temperature to 110°C, add a mixed solution of vinyl monomer (styrene, vinyl acetate, vinylglycine) and initiator dropwise to the reaction kettle, add dropwise for 1 hour, and keep warm at 110°C for 4h, Prompt...

Embodiment 2

[0058] A vinyl monomer-modified polyester resin and a low-shrinkage agent are prepared according to the following raw material formula and preparation method.

[0059] The formula is:

[0060]

[0061]

[0062] The preparation method steps are as follows:

[0063] (1) Add polyhydric alcohol into the reaction kettle with heating device and stirring device, feed nitrogen, heat up and heat until the material in the kettle melts, start stirring, add saturated polybasic acid or acid anhydride, unsaturated polybasic acid or acid anhydride and Esterification catalyst, continue to heat up the water outlet under the protection of nitrogen, the head temperature is 100°C, the reaction temperature is 230°C, and the acid value is 6mgKOH / g;

[0064] (2) Then lower the temperature to 140°C, add a mixture of vinyl monomers (methyl methacrylate, α-methylstyrene, vinyl acetate, butyl acrylate, methacrylic acid) and initiators dropwise into the reactor The solution was added dropwise for...

Embodiment 3

[0067] A vinyl monomer-modified polyester resin and a low-shrinkage agent are prepared according to the following raw material formula and preparation method.

[0068] The formula is:

[0069]

[0070]

[0071] The preparation method steps are as follows:

[0072] (1) Add polyhydric alcohol into the reaction kettle with heating device and stirring device, feed nitrogen, heat up and heat until the material in the kettle melts, start stirring, add saturated polybasic acid or acid anhydride, unsaturated polybasic acid or acid anhydride and Esterification catalyst, continue to heat up the water outlet under the protection of nitrogen, the distillation head temperature is 95°C, the reaction temperature is 140°C, and the acid value is 7mgKOH / g;

[0073] (2) Then the temperature was lowered to 90°C, and the mixed solution of vinyl monomer and initiator was added dropwise to the reaction kettle for 2 hours, and kept at 90°C for 4 hours to obtain 1035g of vinyl monomer modified ...

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Abstract

The invention discloses vinyl monomer-modified polyester resin and an anti-shrinking agent, and preparation methods thereof. A preparation method for the vinyl monomer-modified polyester resin comprises the following steps: subjecting polyol, saturated polyatomic acid or acid anhydride and unsaturated polyatomic acid or acid anhydride to polymerization under the action of a catalyst so as to obtain unsaturated polyester resin; and reacting vinyl monomer with the unsaturated polyester resin under the action of an initiator. The preparation method for the anti-shrinking agent comprises a step ofmixing the vinyl monomer-modified polyester resin, styrene and a polymerization inhibitor. The anti-shrinking agent prepared from the vinyl monomer-modified polyester resin has excellent low shrinkage, toughness, mechanical strength and waterproofness, can substantially improve the stainability of products, overcomes the problem of color bleeding of products, and allows products to have A-grade surface effect; moreover, the anti-shrinking agent has excellent thickening capability and can coordinate with a variety of resin to realize effective thickening so as to allow the resin to reach SMC/BMC construction viscosity.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a vinyl monomer modified polyester resin, a low shrinkage agent and a preparation method. Background technique [0002] The invention of composite materials is a major innovation in the history of human science and technology, which has penetrated into all walks of life and changed the way of life of human beings. Among them, molded materials have the characteristics of high efficiency and one-time molding, and are becoming more and more popular in the field of composite materials. However, unsaturated resins will shrink by 3% to 10% during the molding process, which brings many problems to product production. , such as product bending, cracks, dimensional accuracy is difficult to control, surface smoothness is poor, and resin and glass fiber peel off resulting in reduced strength, etc. [0003] Adding thermoplastic low shrinkage agent (LSA) is the most effective way to solve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F212/08C08F212/12C08F220/54C08F220/18C08F220/28C08F220/34C08F220/56C08F220/14C08L67/06C08L51/08C08L63/10
CPCC08F283/01C08L51/08C08L67/06C08L63/10C08F220/281C08F220/18C08F220/34
Inventor 蒋红娟钱永嘉周国友王凯陶威
Owner CHANGZHOU HUAKE POLYMERS
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