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A kind of resin paste for prepreg, a kind of prepreg and its preparation method and application

A prepreg, resin paste technology, applied in the field of molding compounds, can solve the problem of insufficient strength, and achieve the effects of improving mechanical strength, increasing strength, and preventing styrene volatilization

Active Publication Date: 2022-02-01
CHANGZHOU ZHONGJIE COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Molding compound is a type of plastic. Compared with common thermoplastics, molding compound has higher geometric stability, more resistance to extreme high heat and high humidity complex environment, chemical resistance, high mechanical strength, etc. Commonly used molding compounds mainly include sheet molding compound (SMC) and bulk molding compound (BMC). Although the above two molding compounds have certain strength, SMC and BMC appear to be stretched for areas with high strength requirements. The strength cannot meet the requirements, so there is an urgent need for a new material that can replace or partially replace SMC or BMC

Method used

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  • A kind of resin paste for prepreg, a kind of prepreg and its preparation method and application
  • A kind of resin paste for prepreg, a kind of prepreg and its preparation method and application
  • A kind of resin paste for prepreg, a kind of prepreg and its preparation method and application

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preparation example Construction

[0036] The invention provides a kind of preparation method of prepreg, comprises the following steps:

[0037] After the glass fiber cloth is impregnated with the resin paste for prepreg, the glass fiber cloth impregnated with the resin paste for prepreg is sealed with a wrapping material, and then thickened to obtain a prepreg.

[0038] The invention adopts the glass fiber cloth to strengthen the resin paste for the prepreg, which effectively improves the tensile strength of the prepreg. In the present invention, the glass fiber cloth is preferably a glass fiber checkered cloth.

[0039]In the present invention, the preparation method of the resin paste for prepreg preferably includes the following steps: stirring and mixing the resin system, initiator, internal release agent, and dispersant at a low speed for 5 to 8 minutes, and then adding fillers and stirring and mixing at a high speed for 20 minutes , and finally add the thickener and stir at high speed for 1 min. In th...

Embodiment 1～5

[0047] (1) Turn on the disperser and stir at low speed, the line speed is 5-8m / s, add unsaturated polyester resin, low-shrinkage additive, stabilizer, initiator, pigment paste, internal release agent, and dispersant in sequence, and stir for 5-8m / s 8min;

[0048] (2) Adding fillers, while adding fillers, gradually increase the speed of the disperser to a linear velocity of 18m / s, and disperse for 20 minutes;

[0049] (3) Then add the thickener, and disperse for 1min at the line speed of the disperser at 18m / s to obtain the prepreg;

[0050] (4) Import the resin paste for prepreg into the upper and lower glue tanks of the impregnation molding equipment, and adjust the amount of resin paste for prepreg by adjusting the gap between the scrapers. The lower surface of the polypropylene film and the upper surface of the polyamide film located in the glue tank, then sandwich the glass fiber cloth between the polypropylene film and the polyamide film, enter the impregnation roller fo...

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Abstract

The present invention relates to the field of molding materials, and provides a resin paste for prepreg, a prepreg and its preparation method and application. In parts by mass, the resin paste for prepreg includes the following components: resin system 100 parts; initiator 0.9-1.8 parts; internal release agent 2-5 parts; filler 0-50 parts; thickener 1-3 parts; stabilizer 0.2-0.4 parts; dispersant 0.5-3 parts; the resin The system includes an unsaturated polyester resin and a low-shrinkage additive, and the mass ratio of the unsaturated polyester resin and the low-shrinkage additive is 1-2:1. The present invention also provides a method for preparing a prepreg. In the present invention, after the glass fiber cloth is impregnated with the resin paste, the glass fiber cloth impregnated with the resin paste is sealed with a wrapping material, and then thickened to obtain a prepreg. High-strength prepreg can be used with sheet molding compound to improve the strength of molded products.

Description

technical field [0001] The invention relates to the field of molding materials, in particular to a resin paste for a prepreg, a prepreg and a preparation method and application thereof. Background technique [0002] Since the appearance of plastic products, plastic products have brought great convenience to people's lives and are widely used in daily life, becoming a basic material industry that keeps pace with steel, cement and wood. [0003] Molding compound is a type of plastic. Compared with common thermoplastics, molding compound has higher geometric stability, more resistance to extreme high heat and high humidity complex environment, chemical resistance, high mechanical strength, etc. Commonly used molding compounds mainly include sheet molding compound (SMC) and bulk molding compound (BMC). Although the above two molding compounds have certain strength, SMC and BMC appear to be stretched for areas with high strength requirements. The strength cannot meet the require...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/06C08L25/06C08L67/00C08L31/04C08K13/04C08K7/14C08K3/22C08K3/26C08K3/34C08J5/24
CPCC08J5/24C08J2367/06C08J2425/06C08J2367/00C08J2431/04C08K13/04C08K7/14C08K2003/2227C08K2003/265C08K3/346
Inventor 孙全收史建军
Owner CHANGZHOU ZHONGJIE COMPOSITES