A kind of flame-retardant high-strength GMT composite plate and preparation method thereof

A composite sheet and high-strength technology, which is applied in the field of flame-retardant high-strength GMT composite sheet and its preparation, can solve the problems of non-flame retardancy and achieve the effects of reduced dosage, good mechanical properties, excellent heat insulation and smoke suppression

Active Publication Date: 2021-05-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the traditional GMT sheet in the prior art that it is not flame retardant, the present invention provides a flame-retardant high-strength GMT composite sheet and its preparation method. The GMT composite sheet obtained by the preparation method has high strength, high flame retardancy and Low VOC (volatile organic compounds) and other properties, can be widely used in various automotive interior and exterior trims

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A flame-retardant high-strength GMT composite plate and a preparation method thereof, the preparation method is as follows:

[0031] (1) Add 40g dimethyldiethoxysilane, 20g diphenyldimethoxysilane, 20g trimethoxyphenylsilane and 20g trimethoxymethylsilane to 60g ethanol, add 10g 2vol% HCl solution to adjust the acid value of the reaction, react at 60°C for 4h, slowly add 30g of deionized water dropwise during the reaction, and add NaHCO after the reaction 3 The solution is neutralized to neutrality, and the solvent is removed to obtain an organosilicon precursor.

[0032](2) Dissolve 40g of the organosilicon precursor prepared in step (1) in 47g of ethanol, add 10g of nitrogen-phosphorus composite flame retardant JLS-APP, 2g of microsphere blowing agent, 1g of D200 polymer Etheramine type curing agent, stirred at 200rmp for 40min to obtain a uniform flame retardant solution.

[0033] (3) Immerse the felt with 30wt% PP as bonding matrix and 70wt% glass fiber as reinfor...

Embodiment 2

[0037] A flame-retardant high-strength GMT composite plate and a preparation method thereof, the preparation method is as follows:

[0038] (1) Add 42g dimethyldiethoxysilane, 6g diphenyldimethoxysilane, 6g trimethoxyphenylsilane and 6g trimethoxymethylsilane to 80g ethanol, add 20g 2vol% HCl solution to adjust the acid value of the reaction, react at 80°C for 1 hour, slowly add 40g of deionized water dropwise during the reaction, and add NaHCO after the reaction 3 The solution is neutralized to neutrality, and the solvent is removed to obtain an organosilicon precursor.

[0039] (2) Get 30g of the organosilicon precursor prepared in step (1) and dissolve it in 46g of ethanol, add 20g of nitrogen-phosphorus composite flame retardant JLS-PNA350, 5g of microsphere blowing agent, 2g of D230 polymer Etheramine type curing agent, stirred at 200rmp for 20min to obtain a uniform flame retardant solution.

[0040] (3) Immerse the felt with 30wt% PP as bonding matrix and 70wt% glass ...

Embodiment 3

[0044] A flame-retardant high-strength GMT composite plate and a preparation method thereof, the preparation method is as follows:

[0045] (1) Add 40g dimethyldiethoxysilane, 16g diphenyldimethoxysilane, 16g trimethoxyphenylsilane and 8g trimethoxymethylsilane to 80g ethanol, add 10g 2vol% HCl solution to adjust the acid value of the reaction, react at 70°C for 6h, slowly add 30g of deionized water dropwise during the reaction, and add NaHCO after the reaction 3 The solution is neutralized to neutrality, and the solvent is removed to obtain an organosilicon precursor.

[0046] (2) Dissolve 35g of the organosilicon precursor prepared in step (1) in 43g of ethanol, add 15g of nitrogen-phosphorus composite flame retardant JLS-PNA220, 5g of microsphere blowing agent, 2g of D400 polymer Etheramine type curing agent, stirred at 200rmp for 25min to obtain a uniform flame retardant solution.

[0047] (3) Immerse a felt with 30wtPP as bonding matrix and 70wt% glass fiber as reinforc...

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Abstract

The invention belongs to the technical field of thermoplastic composite materials for interior and exterior decoration of automobiles, and specifically relates to a flame-retardant high-strength GMT composite sheet and a preparation method thereof. The composite sheet consists of the following components: 100 parts of felt, 5-10 parts of organic silicon precursor 10-20 parts of a halogen-free flame retardant, the preparation method of the organosilicon precursor is: dissolving the organosilicon compound in ethanol, adding a HCl solution with a concentration of 2vol% to adjust the reaction acid value, reacting for 1-10h, and reacting Add deionized water dropwise during the process, and add NaHCO after the reaction 3 The solution was neutralized to neutrality, after which the solvent was removed. A silicon precursor with a certain viscosity is prepared by adopting the technical scheme of the present invention, and an intumescent flame retardant is added to the silicone precursor, and the GMT material is impregnated into the prepared flame retardant system, cured and crosslinked, and hot pressed Forming, so that the GMT sheet can not only obtain flame retardant properties, but also improve its mechanical properties, thus obtaining a flame-retardant and high-strength GMT composite sheet.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic composite materials for interior and exterior decoration of automobiles, and in particular relates to a flame-retardant high-strength GMT composite plate and a preparation method thereof. Background technique [0002] Lightweight glass fiber mat reinforced thermoplastic composite sheet, referred to as lightweight GMT (Glass fiber Matreinforced Thermoplastics), is a new type of composite material composed of continuous glass fiber mat and thermoplastic resin fibers. Heat resistance, high strength and toughness, excellent chemical corrosion resistance and environmental adaptability, etc., have become the most actively developed varieties in today's automotive interior and exterior materials, and have been widely used in various automotive interior and exterior accessories (automobile bottom shielding protection devices, luggage racks, roof moldings, hoods, trunk lids, gear case covers, load pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L83/04C08K7/14C08K3/016C08K5/00C08J9/32
CPCC08J9/32C08J2203/22C08J2323/12C08J2483/04C08K5/0066C08K7/14C08K3/016
Inventor 马猛王旭王亚停陈思施燕琴
Owner ZHEJIANG UNIV OF TECH
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