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 high preparation cost, chemical corrosion resistance, poor heat resistance and mechanical properties, and achieve improved compatibility performance, improving tensile and flexural modulus, and reducing cost

Active Publication Date: 2021-08-27
湖北旺林新材料科技有限公司
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  • Abstract
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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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  • 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 embodiment, and embodiment 3 is the best embodiment of the present invention.

[0026] The preparation method of unsaturated polyester resin for pultrusion in the following examples and comparative examples all adopts the following preparation method:

[0027] 1) Under the protection of nitrogen, put polyol terephthalate, methylpropylene glycol and ethylene glycol, phthalic anhydride, benzoic acid, maleic anhydride, antioxidant in the reaction stage, and polymerization inhibitor in the reaction stage In the reaction kettle, stir and heat up, control the temperature of the kettle to be stable at 140~145°C and keep it for 45 minutes, then uniformly raise the temperature to 158~163°C at a rate of 15°C / h, and keep it warm for 1 hour after reacting water; continue to raise the temperature, and control the heating rate at 10~12°C / h, heat up to 210°C and then keep warm for polycondensation reaction. Un...

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Abstract

The invention discloses unsaturated polyester resin for pultrusion and a preparation method thereof, and belongs to the technical field of pultrusion resin and a preparation method thereof. A pultrusion process is a method for continuously producing a composite material profile, the current pultrusion process develops rapidly, and common unsaturated polyester resin for pultrusion is generally synthesized by adopting phthalic anhydride as saturated binary acid. Maleic anhydride, phthalic anhydride, benzoic acid, polyhydric alcohol terephthalate, ethylene glycol and methylpropanediol are utilized and matched with one another, and particularly, the polyhydric alcohol terephthalate is successfully introduced into the unsaturated polyester resin; and the chemical corrosion resistance and the mechanical property of the unsaturated polyester resin for pultrusion are effectively improved, and the application field of the resin is widened.

Description

technical field [0001] An unsaturated polyester resin for pultrusion and a preparation method thereof, belonging 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 engineering, aerospace and other technical fields. Unsaturated polyester resin is used as the matrix resin. The performance of the resin matrix determines the heat resistance of the material. Performance, water resistance, chemical resistance, toughness and so on. [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 cu...

Claims

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Application Information

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Patent Type & Authority Applications(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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