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Unsaturated polyester resin for pultrusion and preparation method for same

A polyester resin, unsaturated technology, applied in the field of unsaturated polyester resin for pultrusion and its preparation, can solve the problems of poor heat resistance, low mechanical strength, etc., to improve compatibility, increase heat distortion temperature, The effect of performance improvement

Active Publication Date: 2012-07-25
宜兴市兴合树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unsaturated polyester resin used for pultrusion has low mechanical strength and poor heat resistance, and it is difficult to meet people's requirements for the performance of pultruded FRP products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Formula: 6600 parts by weight of phthalic anhydride, 4400 parts by weight of maleic anhydride, 2000 parts by weight of 1,2-propanediol, 4000 parts by weight of ethylene glycol, 8500 parts by weight of styrene, 3 parts by weight of hydroquinone, and 3 parts by weight of triphenyl phosphite parts, 0.06 parts by weight of copper naphthenate.

[0031] The preparation method of above-mentioned unsaturated polyester resin for pultrusion, the method may further comprise the steps:

[0032] a) When the nitrogen flow rate is 3m 3 Under the condition of 1,2-propanediol, ethylene glycol, 1 / 2 weight of polymerization inhibitor, phthalic anhydride, maleic anhydride and antioxidant, mix and heat up to 80°C, keep it warm for 1h, and the reaction will exotherm to 140°C ℃, the temperature is raised to 180°C at a rate of 20°C / h, then to 190°C at a rate of 5°C / h, and finally to 210°C at a rate of 10°C / h;

[0033] b) After insulated at 210°C for 5 hours, react until the acid value reache...

Embodiment 2

[0037] Formula: 6500 parts by weight of phthalic anhydride, 4200 parts by weight of maleic anhydride, 1900 parts by weight of 1,2-propanediol, 4100 parts by weight of ethylene glycol, 8800 parts by weight of styrene, 2 parts by weight of hydroquinone, and 4 parts by weight of triphenyl phosphite parts, 0.08 parts by weight of copper naphthenate.

[0038] The preparation method of above-mentioned unsaturated polyester resin for pultrusion, the method may further comprise the steps:

[0039] a) When the nitrogen flow rate is 3m 3 Under the condition of 1,2-propanediol, ethylene glycol, 1 / 2 of the polymerization inhibitor, phthalic anhydride, maleic anhydride and antioxidant, the temperature is raised to 80°C, and the reaction is kept for 1 hour, and the reaction automatically exotherms to 140°C. Heat up to 180°C at a rate of 20°C / h, then to 190°C at a rate of 5°C / h, and finally to 210°C at a rate of 10°C / h;

[0040] b) Insulate and react at 210°C for 5.5 hours, the acid value ...

Embodiment 3

[0044] Formula: 6700 parts by weight of phthalic anhydride, 4600 parts by weight of maleic anhydride, 1800 parts by weight of 1,2-propanediol, 4000 parts by weight of ethylene glycol, 8300 parts by weight of styrene, 4 parts by weight of hydroquinone, and 2 parts by weight of triphenyl phosphite parts, 0.03 parts by weight of copper naphthenate.

[0045] The preparation method of above-mentioned unsaturated polyester resin for pultrusion, the method may further comprise the steps:

[0046] a) When the nitrogen flow rate is 4m 3 Under the condition of 1,2-propanediol, ethylene glycol, 1 / 2 weight of polymerization inhibitor, phthalic anhydride, maleic anhydride and antioxidant, the temperature is raised to 75°C, and the heat preservation reaction is carried out for 1.5h until the reaction is self-exothermic to 140°C, heat up to 180°C at a rate of 18°C / h, then to 190°C at a rate of 4°C / h, and finally to 210°C at a rate of 9°C / h;

[0047] b) Insulate and react at 210°C for 5 hou...

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PUM

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Abstract

The invention discloses unsaturated polyester resin for pultrusion and a preparation method for the same. The resin is mainly made of, by weight, 6400-6800 parts of phthalic anhydride, 4000-4800 parts of maleic anhydride, 1700-2000 parts of 1,2-propylene glycol, 4000-4400 parts of ethylene glycol, 8000-9000 parts of styrene, 1-5 parts of polymerization inhibitor, 1-5 parts of antioxidant and 0.01-1 part of retarding agent. Compared with the prior art, the unsaturated polyester resin has the advantages that the heat distortion temperature of the unsaturated polyester resin is higher than 88 DEG C on the premise of meeting a pultrusion process requirement, and performances such as stretching, compression strength and the like of the unsaturated polyester resin are remarkably enhanced.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to an unsaturated polyester resin for pultrusion and a preparation method thereof. Background technique [0002] In the composite material molding process, the pultrusion molding with unsaturated polyester resin as the matrix resin and reinforced with continuous glass fiber filaments or felt is a continuous and highly automated production process with high production efficiency and stable product quality. Pultruded FRP products have the advantages of high strength and rigidity in the direction of pultrusion, high dimensional accuracy, and smooth surface. After decades of continuous improvement and optimization, pultruded FRP products have been widely used in chemical, petroleum, construction, electric power, transportation, automobile and other fields. Since entering the 21st century, with the rapid development of science and technology, people have higher and higher pe...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08G63/52C08G63/78
Inventor 韩立春潘伯祥陈彬彬
Owner 宜兴市兴合树脂有限公司
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