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Preparation method of non-styrene unsaturated polyester resin

A polyester resin, styrene-based technology, applied in the field of organic polymer compounds, can solve the problems of poor cured product performance, high resin viscosity, and many bubbles in the system, and achieve excellent room temperature curing performance, less bubbles, and low viscosity. Effect

Active Publication Date: 2022-08-02
CHANGZHOU HUARI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared styrene-free flexible unsaturated polyester has high resin viscosity and poor manufacturability, which is very limited in practical application
During the research and development process, the experimenters found that the mixture of non-styrene monomer and unsaturated polyester resulted in high viscosity and poor manufacturability. During curing, the gel time would be too long, the system would have many bubbles, and the cured product Poor performance and other issues

Method used

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  • Preparation method of non-styrene unsaturated polyester resin
  • Preparation method of non-styrene unsaturated polyester resin
  • Preparation method of non-styrene unsaturated polyester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of the non-styrene unsaturated polyester resin of this embodiment is to put 53.24 g of ethylene glycol, 546.50 g of diethylene glycol, 70.00 g of propylene glycol, 53.24 g of ethylene glycol, 70.00 g of trimethylolpropane diallyl into a four-necked flask. 122.00g of ether, 336.00g of phthalic anhydride, 445.00g of maleic anhydride, and 0.16g of methyl hydroquinone were reacted at a reaction temperature of 205°C until the solid acid value was 31.0-36.0mgKOH / g, and a Saturated polyester polymer. Then, 967.20 g of hydroxypropyl methacrylate, a cross-linking monomer, was added when the temperature did not exceed 80 °C, and after dilution, the temperature was lowered to 40 °C and 2.42 g of oxalic acid was added.

Embodiment 2

[0025] The preparation method of the non-styrene unsaturated polyester resin of the present embodiment is to put into a four-necked flask, 689.00 g of diethylene glycol, 115.56 g of trimethylolpropane diallyl ether, 336 g of tetrahydrophthalic anhydride, cis 445.0 g of butenedioic anhydride and 0.476 g of methyl hydroquinone were reacted at a reaction temperature of 180° C. to a solid acid value of 18.0-23.0 mgKOH / g to obtain an unsaturated polyester polymer. Then add 292.80g of cross-linking monomer hydroxyethyl methacrylate and 683.24g of cross-linking monomer diethylene glycol dimethacrylate when the temperature does not exceed 80°C, and then cool down to 40°C and add 2.44g of cross-linking monomer diethylene glycol dimethacrylate after dilution. Acetic acid.

Embodiment 3

[0027] The preparation method of the non-styrene type unsaturated polyester resin of the present embodiment is to put 689.00 g of diethylene glycol and 539.5 g of methyltetrahydrophthalic anhydride into a four-necked flask, and the temperature is raised to 205° C. to react to a solid acid value of 5.0 ~10.0 mgKOH / g, then cooled to below 120°C, put in 83.46g of trimethylolpropane diallyl ether, 318.50g of maleic anhydride, and 0.476g of methyl hydroquinone, and reacted at a reaction temperature of 160°C, The reaction is carried out to a solid acid value of 23.0-28.0 mgKOH / g to obtain an unsaturated polyester polymer. Then add 302.6g of cross-linking monomer hydroxypropyl methacrylate and 705.4g of cross-linking monomer diethylene glycol dimethacrylate when the temperature does not exceed 80°C, dilute and cool down to 40°C and add 5.04g of Monomethyl succinate.

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Abstract

The invention relates to a preparation method of a non-styrene type unsaturated polyester resin. The condensation reaction of dihydric alcohol, monohydroxy allyl ether monomer, saturated dibasic acid or acid anhydride, and unsaturated dibasic acid or acid anhydride is carried out to obtain Unsaturated polyester polymer; then adding non-styrene cross-linking monomer and defoaming additive to unsaturated polyester polymer to obtain non-styrene unsaturated polyester resin; cross-linking monomer is acrylic acid-containing mono One or more of esters, methacrylic acid-containing monoesters, acrylic acid-containing diesters, and methacrylic acid-containing diesters; the defoaming additive is an organic compound containing a carboxyl group, and the molecular weight of the defoaming additive is 46 to 350, The acid value is 160.0 mgKOH / g to 1246.0 mgKOH / g. The non-styrene-type unsaturated polyester resin of the present invention can be cured at room temperature, basically has no air bubbles after curing, and the cured product has excellent performance.

Description

technical field [0001] The invention relates to a preparation method of a non-styrene unsaturated polyester resin cured at room temperature and a cured product formed by the resin, belonging to the technical field of organic polymer compounds. Background technique [0002] Unsaturated polyester resin is formed by polycondensation of diol, saturated dibasic acid or acid anhydride, unsaturated dibasic acid or acid anhydride, and its molecular structure contains non-aromatic unsaturated bonds, usually composed of cross-linking monomer styrene. It is diluted and cross-linked by an appropriate initiator to become a thermosetting plastic. Unsaturated polyester resin can be combined with glass fiber to make all kinds of glass fiber reinforced plastic products, and can also be mixed with various fillers to cast artificial marble products. [0003] Since unsaturated polyester resin contains volatile cross-linking monomer styrene, although it has many advantages in actual production ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/01C08F222/14C08G63/52
CPCC08F283/01C08G63/52
Inventor 王合情古园诚伏艳曹星谈益新宦胜民
Owner CHANGZHOU HUARI NEW MATERIAL