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A kind of high temperature curing epoxy-based wet release cloth and preparation method thereof

A technology of high-temperature curing and wet peeling, which is applied in textiles and papermaking, motor vehicles, aircraft, etc. It can solve the problems of easy contamination of the surface, poor reliability and stability of secondary bonding, etc., achieve good protection and improve heat resistance , The effect of improving durability

Active Publication Date: 2021-06-04
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the technical problems that the existing domestic composite material parts are polished and sandblasted before the secondary bonding, the surface is easily polluted, and the reliability and stability of the secondary bonding is poor, and provides a high-temperature curing epoxy base Wet release cloth and preparation method thereof

Method used

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  • A kind of high temperature curing epoxy-based wet release cloth and preparation method thereof
  • A kind of high temperature curing epoxy-based wet release cloth and preparation method thereof
  • A kind of high temperature curing epoxy-based wet release cloth and preparation method thereof

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specific Embodiment approach 1

[0021] Specific Embodiment 1: In this embodiment, a high-temperature curing epoxy-based wet release cloth is composed of 50-80 parts by mass of main resin, 15-40 parts of modified resin, and 3-10 parts of toughening agent. , 10-30 parts of curing agent and 1-10 parts of flame retardant;

[0022] The main resin is composed of bisphenol A epoxy resin, cycloaliphatic epoxy resin, biphenyl epoxy resin and dicyclopentadiene epoxy resin, and the biphenyl epoxy resin accounts for 25% of the total mass of the main resin. ~40%, dicyclopentadiene type epoxy resin accounts for 15%~25% of the total mass of the main resin, and the balance is one or two of bisphenol A type epoxy resin and alicyclic epoxy resin. mixture of proportions.

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the high-temperature curing epoxy-based wet release cloth is composed of 60 to 75 parts by mass of the main resin and 20 to 35 parts of the modified resin. , 5-8 parts of toughening agent, 15-25 parts of curing agent and 2-7 parts of flame retardant. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: the high-temperature curing epoxy-based wet peeling cloth is composed of 75 parts by mass of main resin, 30 parts of modified resin, 7 parts by mass 10 parts toughening agent, 20 parts curing agent and 5 parts flame retardant. Others are the same as in the first or second embodiment.

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Abstract

A high-temperature curing epoxy-based wet-release cloth and a preparation method thereof, the invention relates to the field of wet-release cloth and a preparation method thereof. The invention aims to solve the technical problems that the existing domestic composite material parts are subjected to grinding and sandblasting before the secondary bonding, the surface is easily polluted, and the reliability and stability of the secondary bonding is poor. The wet peeling cloth is made of main resin, modified resin, toughening agent, curing agent and flame retardant; method: 1. Weighing raw materials; 2. Blending main resin and toughening agent; 3. Grinding modified resin 1. Curing agent and flame retardant; 4. Mix in a kneader to obtain rubber; 5. Preheat and compound the rubber and carrier on a calender. The high-temperature-cured epoxy-based wet peeling cloth of the present invention has good matching performance with the high-temperature-cured epoxy-based prepreg, and is easy to peel off after curing. The wet peeling cloth prepared by the invention is used for the treatment of the secondary bonding surface of the high-temperature curing epoxy-based composite material and the protection of the surface before bonding, and can be co-cured with the composite material.

Description

technical field [0001] The invention relates to the field of wet release cloth and its preparation method. Background technique [0002] All kinds of aviation vehicles are made of composite materials in order to meet the design requirements. In the manufacturing process of high-performance aerospace composite parts, the surface treatment of pre-cured composite materials is usually carried out with wet release cloth to improve the reliability and stability of the secondary bonding. At present, there is no research on wet release cloth in China. Therefore, it is of great significance to develop a wet release cloth that matches the domestic prepreg and film resin system, so as to meet the development needs of my country's aerospace field for the overall molding technology of composite materials. Contents of the invention [0003] The invention aims to solve the technical problems that the existing domestic composite material parts are polished and sandblasted before the sec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/00D06N3/12
CPCD06N3/0077D06N3/12D06N2209/067D06N2209/1664D06N2211/267
Inventor 冯浩曲春艳李洪峰王德志张杨宿凯杨海冬刘长威肖万宝王海民王文博王旭
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI