Flaky molding compound resin composition, flaky molding compound and preparation method of flaky molding compound

A sheet molding compound and resin composition technology, applied in the field of composite materials, can solve the problems of high viscosity of epoxy resin, unfavorable fiber infiltration, low VOC emission, etc., and achieve the effects of less addition, low oil absorption value and low viscosity

Active Publication Date: 2019-08-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The VOC requirements for automotive interior parts are becoming more and more stringent. Epoxy resin has excellent comprehensive performance, does not contain styrene, and has higher strength than unsaturated resin. Epoxy resin is used instead of unsaturated resin to prepare sheet molding compound sheets and molded The products have low VOC emissions, but there are two problems in the preparation of epoxy resin sheet molding compounds: 1. It is difficult to thicken. 2. The viscosity of epoxy resin is high, which is not conducive to infiltration with fibers when making sheets.
This scheme uses alkaline earth metal oxides, alkaline earth metal hydroxides, isocyanate compounds, and alcohols as thickeners for SMC products, and reacts with isocyanates, alcohols, and epoxy secondary hydroxyl groups to perform chemical thickening, and the thickening effect is relatively poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] By weight, weigh 50 parts of Nanya bisphenol A epoxy resin 128, 4 parts of N,N'-dimethylethylenediamine, 1 part of methyl-(2-p-toluene-ethyl)amine, 1 part of tris Phenyl phosphorus oxide and 3 parts of dicyandiamide curing agents are put into a stirring device, and stirred evenly to obtain a resin paste;

[0047] On the sheet molding compound unit, the resin paste in the resin paste tank is coated on the first film by a scraper, the first film carries the resin paste and passes through the fiber settlement area, and the chopped fibers settle on the first film carrying the resin paste; At the composite roller, the resin paste is coated on the second film by a scraper; the second film coated with the resin paste is combined with the first film carrying the fiber and the resin paste to form the first film / resin paste / fiber / The interlayer structure of resin paste / second film, and then compress and knead the above interlayer structure, so that the resin paste fully infiltra...

Embodiment 2

[0051] By weight, weigh 50 parts of Nanya bisphenol A epoxy resin 128, 4 parts of N,N'-dimethylethylenediamine, 1 part of methyl-(2-p-toluene-ethyl)amine, 1 part of tris Phenyl phosphorus oxide, 3 parts of dicyandiamide curing agent, 20 parts of aluminum hydroxide, 5 parts of calcium carbonate, 10 parts of phenoxy resin, 2 parts of 2,4 toluene bis-dimethyl urea, 2 parts of BYK-W996, 2 parts of hard Zinc fatty acid is put into stirring equipment, and the resin paste is obtained by stirring evenly;

[0052] On the sheet molding compound unit, the resin paste in the resin paste tank is coated on the first film by a scraper, the first film carries the resin paste and passes through the fiber settlement area, and the chopped fibers settle on the first film carrying the resin paste; At the composite roller, the resin paste is coated on the second film by a scraper; the second film coated with the resin paste is combined with the first film carrying the fiber and the resin paste to f...

Embodiment 3

[0056] By weight, weigh 50 parts of Nanya bisphenol A epoxy resin 128, 3 parts of N,N'-dimethylethylenediamine, 1 part of methyl-(2-p-toluene-ethyl)amine, 2 parts of tris Phenyl phosphorus oxide, 3 parts of dicyandiamide curing agent, 20 parts of aluminum hydroxide, 5 parts of calcium carbonate, 10 parts of phenoxy resin, 2 parts of 2,4 toluene bis-dimethyl urea, 2 parts of BYK-W996, 2 parts of hard Zinc fatty acid is put into stirring equipment, and the resin paste is obtained by stirring evenly;

[0057] On the sheet molding compound unit, the resin paste in the resin paste tank is coated on the first film by a scraper, the first film carries the resin paste and passes through the fiber settlement area, and the chopped fibers settle on the first film carrying the resin paste; At the composite roller, the resin paste is coated on the second film by a scraper; the second film coated with the resin paste is combined with the first film carrying the fiber and the resin paste to ...

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PUM

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Abstract

The invention discloses flaky molding compound resin composition, a flaky molding compound and a preparation method of the flaky molding compound. The flaky molding compound resin composition is prepared from substances in parts by weight as follows: 40-60 parts of epoxy resin, 1-20 parts of a thickening agent, 1-5 parts of a thickening accelerant and 1-5 parts of a curing agent. The flaky moldingcompound prepared from the flaky molding compound composition has good mechanical strength, good toughness, low VOC (volatile organic compound) content and good environmental protection performance.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a sheet molding compound resin composition, a sheet molding compound and a preparation method thereof. Background technique [0002] The VOC requirements for automotive interior parts are becoming more and more stringent. Epoxy resin has excellent comprehensive performance, does not contain styrene, and has higher strength than unsaturated resin. Epoxy resin is used instead of unsaturated resin to prepare sheet molding compound sheets and molded The VOC emission of the products is low, but there are two problems in the preparation of epoxy resin sheet molding compound: 1. It is difficult to thicken. 2. The viscosity of epoxy resin is high, which is not conducive to infiltration with fibers when making sheets. [0003] Patent CN101088754A discloses an epoxy sheet molding compound, which is made of the following raw materials in parts by weight: 100 parts of epoxy resin, 4 to 20 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L71/12C08K5/17C08K7/14C08K7/06C08J5/18
CPCC08L63/00C08K5/17C08K7/14C08K7/06C08J5/18C08J2363/00C08J2471/12C08L71/12
Inventor 周维段平平廖乾勇马礼涛
Owner BYD CO LTD
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