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Resin composite mica paper and preparation method thereof

A technology of resin compounding and mica paper, which is applied in the field of mica paper, can solve the problems of poor mechanical strength and toughness of mica paper, and cannot meet the needs of multi-field industry applications.

Active Publication Date: 2018-02-23
安徽大松树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength and toughness of mica paper directly made from mica sheets are not good, and cannot meet the needs of many industries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Mica powder (120 mesh), polyacrylamide (weight-average molecular weight of 0.5 million), ethylenediaminetetraacetic acid and water are mixed according to the weight ratio of 200:5:5:100 to prepare mica pulp; finally The mica pulp is made into mica paper, and the mica paper is a mica layer; before 1), the mica sheet is washed with water with a liquid-solid ratio of 4 until the turbidity of the water is 11°, and washed 3 times.

[0023] 2) earlier novolac epoxy resin (weight-average molecular weight is 20,000), polyimide resin (weight-average molecular weight is 30,000), ethylene glycol ether, alcohol fat twelve, dibutyl phthalate and water Mix according to the weight ratio of 100:50:10:1:1:100, then perform heat treatment at 180° C. for 1.5 hours, and finally extrude to obtain a resin layer.

[0024] 3) Place the prepared mica paper on top of the prepared resin layer, heat-compress and compound at 170° C. with a pressure of 13 MPa for 4 hours, and then cool naturally ...

Embodiment 2

[0026] 1) Stir and mix mica powder (180 mesh), polyacrylamide (weight-average molecular weight: 20,000), ethylenediaminetetraacetic acid and water according to the weight ratio of 220:8:8:100 to prepare mica pulp; The mica pulp is made into mica paper, and the mica paper is a mica layer; before 1), the mica sheet is washed with water with a liquid-solid ratio of 5 until the turbidity of the water is 10°, and washed 3 times.

[0027] 2) earlier novolac epoxy resin (weight-average molecular weight is 30,000), polyimide resin (weight-average molecular weight is 40,000), ethylene glycol ether, alcohol fat twelve, dibutyl phthalate and water The mixture was mixed according to the weight ratio of 100:80:13:3:3:130, followed by heat treatment at 190° C. for 1.0 h, and finally extruded to obtain a resin layer.

[0028] 3) The prepared mica paper was placed on the prepared resin layer, and at 172° C., the pressure was selected to be 13 MPa for hot-compression lamination for 4 hours, fo...

Embodiment 3

[0030] 1) Mica powder (200 mesh), polyacrylamide (weight-average molecular weight: 25,000), ethylenediaminetetraacetic acid and water are mixed according to the weight ratio of 250:10:10:100 to prepare mica pulp; finally The mica pulp is made into mica paper, and the mica paper is a mica layer; before 1), the mica sheet is washed with water with a liquid-solid ratio of 5 until the turbidity of the water is 12°, and washed 3 times.

[0031] 2) earlier novolac epoxy resin (weight-average molecular weight is 40,000), polyimide resin (weight-average molecular weight is 50,000), ethylene glycol ether, alcohol fat twelve, dibutyl phthalate and water Mixing according to the weight ratio of 100:95:15:5:5:150, followed by heat treatment at 200°C for 0.5h, and finally extrusion molding to obtain a resin layer.

[0032] 3) Place the prepared mica paper on top of the prepared resin layer, heat press and compound at 175° C. with a pressure of 14 MPa for 3 hours, and then cool naturally to ...

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Abstract

The invention discloses a resin composite mica paper. A preparation method of the resin composite mica paper comprises preparation of a mica layer, preparation of a resin layer and compounding of the mica layer and the resin layer. The preparation process of the resin layer comprises mixing phenolic epoxy resin, polyimide resin, ethylene glycol ether, 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, dibutyl phthalate and water, carrying out heat treatment, and carrying out extrusion molding to obtain the resin layer. The compounding process of the mica layer and the resin layer comprises placing the mica paper on the resin layer, carrying out hot-pressing compounding, and then carrying out natural cooling so that the resin composite mica paper is obtained. The resin composite mica paper has insulativity and high temperature resistance of the mica paper and has high mechanical strength and toughness.

Description

technical field [0001] The invention relates to mica paper, in particular to resin composite mica paper and a preparation method thereof. Background technique [0002] Mica is a general term for a class of hydrous aluminosilicates. Mica has excellent properties such as insulation and high temperature resistance, and is widely used in coatings, paints, fire protection and electrical industries. Among them, making mica into mica paper is one of the most widely used mica applications. [0003] At present, mica paper has all the varieties corresponding to sheet mica products. The industry mainly uses the insulation and heat resistance of mica paper, as well as its acid and alkali resistance, to be used as insulating materials for electrical equipment and electrical equipment. However, the mechanical strength and toughness of the mica paper directly prepared from the mica sheets are not good, and cannot meet the needs of various industrial applications. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/38D21H13/44D21H17/55B32B37/15B32B37/06B32B19/04B32B27/10B32B27/42B32B27/38B32B27/40B32B27/20B32B7/10
CPCB32B7/10B32B19/045B32B27/10B32B27/20B32B27/38B32B27/40B32B27/42B32B37/06B32B37/15B32B37/153D21H13/44D21H17/55D21H27/38
Inventor 马西健
Owner 安徽大松树脂有限公司
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