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A kind of unsaturated polyester resin for pultrusion and preparation method thereof

A polyester resin and unsaturated technology, which is applied in the field of unsaturated polyester resin for pultrusion and its preparation, can solve the problems of chemical corrosion resistance, poor heat resistance mechanical properties, high preparation cost, etc., and achieve improved stretching and Bending elastic modulus, improving compatibility, and preventing precipitation

Active Publication Date: 2022-07-15
湖北旺林新材料科技有限公司
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Problems solved by technology

[0003] The current pultrusion molding process is developing rapidly. Common unsaturated polyester resins for pultrusion are generally synthesized using phthalic anhydride as a saturated dibasic acid. In practical applications, it is found that the resin materials of the prior art still cannot fully meet the current pultrusion requirements. Formed product requirements, problems such as chemical corrosion resistance, heat resistance, and poor mechanical properties have always existed
Moreover, as the price of phthalic anhydride continues to rise, the preparation cost of unsaturated polyester resin for pultrusion is also getting higher and higher

Method used

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  • A kind of unsaturated polyester resin for pultrusion and preparation method thereof

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the embodiments, and Embodiment 3 is the best embodiment of the present invention.

[0026] In the following examples and comparative examples, the preparation method of the unsaturated polyester resin for pultrusion adopts the following preparation method:

[0027] 1) Under nitrogen protection, terephthalic acid polyol ester, methyl propylene glycol and ethylene glycol, phthalic anhydride, benzoic acid, maleic anhydride, reaction stage antioxidant, and reaction stage polymerization inhibitor are put into In the reaction kettle, stir and heat up, control the temperature of the kettle to be kept at 140~145℃ for 45min, and then uniformly heat up to 158~163℃ at 15℃ / h, and keep the temperature for 1h after the reaction water is discharged; continue to heat up, and control the heating rate at 10~12℃ / h, the temperature was raised to 210 °C, and then the polycondensation reaction was carried out by main...

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Abstract

An unsaturated polyester resin for pultrusion and a preparation method thereof belong to the technical field of pultrusion resins and a preparation method thereof. The pultrusion process is a method for continuous production of composite material profiles. The current pultrusion process is developing rapidly. Common unsaturated polyester resins for pultrusion are generally synthesized by using phthalic anhydride as a saturated dibasic acid. The present invention utilizes maleic anhydride, phthalic anhydride, benzoic acid, terephthalic acid polyol ester, ethylene glycol and methyl propylene glycol, and each raw material component cooperates with each other, especially the successful terephthalic acid The introduction of formic acid polyol ester into the unsaturated polyester resin effectively improves the chemical corrosion resistance and mechanical properties of the unsaturated polyester resin for pultrusion, and broadens the application field of the resin.

Description

technical field [0001] An unsaturated polyester resin for pultrusion and a preparation method thereof belong to the technical field of unsaturated polyester resin for pultrusion and a preparation method thereof. Background technique [0002] The pultrusion process is a method of continuous production of composite material profiles. The products are widely used in construction, transportation, electrical, aerospace and other technical fields. Unsaturated polyester resin is used as its matrix resin. The performance of the resin matrix determines the heat resistance of the material. performance, water resistance, chemical resistance, toughness, etc. [0003] At present, the pultrusion molding process is developing rapidly. Common unsaturated polyester resins for pultrusion are generally synthesized by using phthalic anhydride as a saturated dibasic acid. In practical applications, it is found that the resin materials in the prior art still cannot fully meet the current pultrusi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/547C08G63/78
CPCC08G63/547C08G63/78
Inventor 张富林张敬柱杨国庆吴洪沛杨庚张竞文
Owner 湖北旺林新材料科技有限公司
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