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Glass fiber cloth reinforced insulating molded board and preparation method thereof

A glass fiber cloth, molding technology, applied in the field of molded boards, can solve the problems of high temperature resistance, mechanical properties can not meet actual needs, poor flame retardant performance, inconvenience, etc., to achieve excellent high temperature resistance, excellent mechanical properties, and reasonable process design. Effect

Active Publication Date: 2021-07-23
HUIZHOU ZONGSHENG ELECTRONICS MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Epoxy resin laminates have excellent mechanical properties, electrical insulation properties and easy processing properties, and are widely used in chemical, mechanical, and electrical fields. However, conventional epoxy resin laminates on the market are flammable and have poor flame retardancy. Moreover, the high temperature resistance and mechanical properties cannot meet the actual needs, which brings inconvenience to the actual application.

Method used

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  • Glass fiber cloth reinforced insulating molded board and preparation method thereof
  • Glass fiber cloth reinforced insulating molded board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of an insulating molded board reinforced by glass fiber cloth, comprising the following steps:

[0038] (1) Take 4-hydroxyphenylboronic acid and tetrahydrofuran, mix them evenly in an ice-water bath at 0°C, then add triethylamine and tetrahydrofuran solution of phenylphosphoryl dichloride, keep warm for 2 hours, then raise the temperature to 25°C, and continue the reaction for 10 hours , after the reaction is finished, it is filtered and washed, and dried in vacuum at 60°C for 24 hours to obtain a flame retardant;

[0039] (2) Take dichloromethane, phenylene anhydride, phenylacetylene and triethylamine, mix and stir for 20 minutes, react at 25°C for 9 hours, filter and wash with suction, and recrystallize to obtain material A;

[0040] Take material A, transfer it to acetone under a nitrogen atmosphere, add an aminosilane coupling agent, react at 25°C for 3 hours, remove the acetone, and obtain a modified silane coupling agent; the aminosilane coupl...

Embodiment 2

[0046] A preparation method of an insulating molded board reinforced by glass fiber cloth, comprising the following steps:

[0047] (1) Take 4-hydroxyphenylboronic acid and tetrahydrofuran, mix them evenly in an ice-water bath at 0°C, then add triethylamine and a tetrahydrofuran solution of phenylphosphoryl dichloride, keep the temperature for 2.5 hours, then raise the temperature to 27°C, and continue the reaction 9h, after the reaction was completed, it was filtered and washed with suction, and vacuum-dried at 65°C for 22h to obtain a flame retardant;

[0048] (2) Take dichloromethane, metaphthalic anhydride, phenylacetylene and triethylamine, mix and stir for 25 minutes, react at 28°C for 8.5 hours, wash with suction, and recrystallize to obtain material A;

[0049] Take material A, transfer it to acetone under nitrogen atmosphere, add aminosilane coupling agent, react at 28°C for 2.5h, remove acetone, and obtain modified silane coupling agent; the aminosilane coupling agen...

Embodiment 3

[0055] A preparation method of an insulating molded board reinforced by glass fiber cloth, comprising the following steps:

[0056] (1) Take 4-hydroxyphenylboronic acid and tetrahydrofuran, mix them evenly in an ice-water bath at 0°C, then add triethylamine and tetrahydrofuran solution of phenylphosphoryl dichloride, keep the temperature for 3 hours, then raise the temperature to 28°C, and continue the reaction for 8 hours , after the reaction is finished, it is filtered and washed, and vacuum-dried at 70° C. for 20 hours to obtain a flame retardant;

[0057] (2) Take dichloromethane, phenylene anhydride, phenylacetylene and triethylamine, mix and stir for 30 minutes, react at 30°C for 8 hours, filter and wash with suction, and recrystallize to obtain material A;

[0058] Take material A, transfer it to acetone under a nitrogen atmosphere, add an aminosilane coupling agent, react at 30°C for 2 hours, remove the acetone, and obtain a modified silane coupling agent; the aminosil...

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Abstract

The invention discloses a glass fiber cloth reinforced insulating molded board and a preparation method thereof. The glass fiber cloth reinforced insulating molded board comprises reinforcing material glass fiber cloth and glue solution coated on two sides of the glass fiber cloth; in order to improve cohesiveness and permeability between the glue solution and the reinforcing material glass fiber cloth, when alkali-free glass fiber cloth is impregnated, the modified silane coupling agent, the citric acid and the sodium hypophosphite are added and mixed, and due to the introduction of the modified silane coupling agent and the mutual synergistic effect of the components such as the citric acid and the sodium hypophosphite, the high temperature resistance and the flame retardance of the glass fiber cloth can be effectively improved; the molded board prepared by the invention not only has excellent mechanical properties, but also has excellent high-temperature resistance and flame retardance due to modification of the flame retardant and modification treatment of the silane coupling agent, can be suitable for various environmental applications, and has higher practicability.

Description

technical field [0001] The invention relates to the technical field of molded boards, in particular to a glass fiber cloth reinforced insulating molded board and a preparation method thereof. Background technique [0002] Molded board, also called laminated board, is a kind of laminated product. A laminated product is a whole made of two or more layers of resin-impregnated fibers or fabrics that are laminated and bonded by heat and pressure. Laminated products can be processed into various insulating and structural parts, which are widely used in motors, transformers, high and low voltage electrical appliances, electrical instruments and electronic equipment. [0003] Epoxy resin laminates have excellent mechanical properties, electrical insulation properties and easy processing properties, and are widely used in chemical, mechanical, and electrical fields. However, conventional epoxy resin laminates on the market are flammable and have poor flame retardancy. Moreover, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/08C08L63/04C08L63/00C08L13/00C08K3/22C08K5/55C08K9/06C08K7/14
CPCC08J5/08C08J2363/04C08J2413/00C08J2463/00C08K5/55C08K2003/2227C08K2201/011
Inventor 张宗权何辉春
Owner HUIZHOU ZONGSHENG ELECTRONICS MATERIAL CO LTD
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