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Manufacturing method of polyimide composite

A manufacturing method and polyimide technology are applied in the manufacturing field of polyimide composite materials, which can solve the problems of high manufacturing cost and short heating and hardening time.

Inactive Publication Date: 2018-04-17
TAIWAN FIRST LI BOND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for manufacturing a polyimide composite material, especially a method for manufacturing a polyimide composite material with a high glass transition temperature and a short heating and hardening time, so as to solve the problem of polyimide commonly used at present. The problem of high manufacturing cost of composite materials

Method used

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  • Manufacturing method of polyimide composite
  • Manufacturing method of polyimide composite
  • Manufacturing method of polyimide composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First, dissolve 3,3',4,4'-benzophenonetetracarboxylic dianhydride (3,3',4,4'-benzophenonetetracarboxylic dianhydride, BTDA, CAS No.2421-28-5) in ethanol and esterified to form 3,3',4,4'-diethyl ester of 3,3',4,4'-benzophenonetetracarboxylic acid (BTDE) solution, 3,3' , The weight ratio of 4,4'-benzophenonetetracarboxylic dianhydride to ethanol is 1:1.40, and the solid content in the BTDE solution is 41.6wt%. Norbornene diacid anhydride (NA, CAS No.129-64-6) was dissolved in ethanol and esterified to form Nadic acid monoethyl ester (monoethyl ester of nadic acid, NE) solution, norbornene diacid anhydride and The weight ratio of ethanol is 1:0.87, and the solid content in the NE solution is 53.5wt%. Next, 708 grams of 4,4'-diaminodiphenylmethane (4,4'-Methylenedianiline, CAS No.101-77-9 ), 1542 grams of BTDE solution and 969 grams of NE solution were mixed and stirred to obtain a polyamic acid solution. The solid content in the polyamic acid solution is 58.0wt%, and th...

Embodiment 2

[0035] Embodiment 2 is similar to Embodiment 1, and the difference is that in Embodiment 2, when performing the second hot-pressing process, the time for pressing the prepreg stack is 240 minutes.

Embodiment 3

[0037] Embodiment 3 is similar to Embodiment 1, and the difference is that in Embodiment 3, when performing the second hot-pressing process, the time for pressing the prepreg stack is 360 minutes.

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Abstract

The invention provides a manufacturing method of a polyimide composite. The method includes forming a presoaking material through soaking fiber cloth with polyamide acid solution; forming a presoakingmaterial overlapping layer through overlapping a plurality of presoaking material; performing first hot pressing of pressuring the presoaking material overlapping layer with a first pressure at a first heating temperature; performing second hot pressing of pressuring a presoaking material overlapping layer subjected to first hot pressing with a second pressure at a second heating temperature. Thus the polyimide composite is obtained. The second heating temperature is higher than the first heating temperature and the second pressure is greater than the first pressure. During first hot pressingand second hot pressing, polyamide acid in the presoaking material overlapping layer undergoes sub-amidation andcross-linking reaction, so that polyimide is formed.

Description

technical field [0001] The present invention relates to a manufacturing method of polyimide composite material, especially a manufacturing method of polyimide composite material with high glass transition temperature (glass transition temperature, Tg) and short heating and hardening time. Background technique [0002] Polymerization of Monomer Reactants polyimides (PMR polyimide) is a thermosetting resin (thermosetting resin) that can withstand high temperatures above 300° C. for a long time without deterioration. The polyimide composite material composed of monomer reactant polymerized polyimide and fiber material has the characteristics of low density, high temperature resistance and high mechanical strength, so it is widely used in the aerospace industry and other industries that require high temperature resistance and high mechanical strength. Strong industrial product. [0003] However, in the current manufacturing method of polyimide composite materials, it takes a lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54C08G73/10C08K7/06
CPCB29C70/34B29C70/54C08G73/1042C08G73/1075C08K7/06
Inventor 卓锡樑沈家旭
Owner TAIWAN FIRST LI BOND
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