Flexible heat protection coating, flexible heat protection coating for ethylene propylene rubber and preparation method thereof

An ethylene-propylene rubber, thermal protection technology, applied in fire-resistant coatings, coatings, etc., can solve the problems of poor self-adhesion and mutual adhesion, difficult to combine thermal protection coatings, and increase surface adhesion.

Active Publication Date: 2022-06-28
陕西天蓝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of active groups in the molecular structure of ethylene-propylene rubber, low cohesive energy, poor self-adhesiveness and mutual adhesion, it is difficult to combine with thermal protective coatings. In order to solve this problem, it is necessary to carry out silicone rubber thermal protective coatings Technological improvement to improve the flexibility and adhesion of the coating, and at the same time surface treatment to increase the adhesion of the surface and achieve a firm combination with the silicone rubber heat protection coating

Method used

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  • Flexible heat protection coating, flexible heat protection coating for ethylene propylene rubber and preparation method thereof
  • Flexible heat protection coating, flexible heat protection coating for ethylene propylene rubber and preparation method thereof
  • Flexible heat protection coating, flexible heat protection coating for ethylene propylene rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] First, the flexible thermal protective coating for ethylene-propylene rubber, its raw material ratio: 60g of methyl phenyl silicone rubber, 6g of methyl hydrogen silicone oil, 15g of hollow glass microspheres, 20g of 120# solvent (industrial heptane), orthosilicone 3 g of ethyl acetate, 0.5 g of dibutyl tin dilaurate, and 0.5 g of silane coupling agent. After mixing the film former, filler, organic solvent, and coupling agent, use a high-speed disperser to stir for 15-20 minutes at a speed of 1000r / min, then add a cross-linking agent and a catalyst, and stir quickly to obtain a flexible thermal protection coating.

[0041] The surface of the ethylene-propylene rubber is degreased, and the primer is brushed. The primer is composed of tetraethyl orthosilicate, γ-methacryloxypropyl trimethoxysilane and butadiene triethoxysilane according to the quality The ratio is 2:5:3 mixed preparation. Use the air spraying process to spray the required thickness of 1mm on the surface ...

Embodiment 2

[0043] First, the flexible thermal protective coating for ethylene-propylene rubber, its raw material ratio: 50g of methyl diphenyl silicone rubber, 10g of methyl hydrogen silicone oil, 25g of hollow glass microspheres, 25g of 120# solvent, 3.5 g, 0.3 g of dioctyltin diacetate, 0.5 g of silane coupling agent, and 2.5 g of mica powder. After mixing the film-forming material, filler, organic solvent, coupling agent and mica powder, use a high-speed disperser to stir for 15-20 minutes at a speed of 1000r / min, then add a cross-linking agent and a catalyst, and then stir quickly to obtain a flexible heat Protective coatings.

[0044] The surface of the ethylene-propylene rubber is degreased, and the primer is brushed. The primer is composed of tetraethyl orthosilicate, γ-methacryloxypropyl trimethoxysilane and butadiene triethoxysilane according to the quality The ratio is 2:5:3 mixed preparation. Spray 1mm on the surface of ethylene-propylene rubber by air spraying process, cure...

Embodiment 3

[0046] First, the flexible thermal protective coating for ethylene-propylene rubber, the raw material ratio: 50g of methyl phenyl silicone rubber, 15g of methyl hydrogen silicone oil, 20g of hollow glass microspheres, 30g of 120# solvent, 4.0g of ethyl orthosilicate , 0.5 g of dibutyltin diacetate, and 0.5 g of a titanate coupling agent. After mixing the film former, filler, organic solvent, and coupling agent, use a high-speed disperser to stir for 15-20 minutes at a speed of 1000r / min, then add a cross-linking agent and a catalyst, and stir quickly to obtain a flexible thermal protection coating.

[0047] The surface of the ethylene-propylene rubber is degreased, the primer is brushed, and the surface of the ethylene-propylene rubber is sprayed with an air spraying process of 1mm, and heated and cured at 120°C for 4 hours, and finally a flexible thermal protective coating is obtained.

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Abstract

The invention discloses a flexible heat protection coating, a flexible heat protection coating for ethylene-propylene rubber and a preparation method thereof, belonging to the technical field of heat protection coatings. Silicone rubber vulcanized at room temperature can be maintained for a long time in the temperature range of -65 to 250°C Elasticity, while hydrogen-containing silicone oil can be cross-linked to form a film at low temperature, and is often used as a softener. Under the action of a catalyst, the hydroxyl group in the silicone rubber reacts with the active silicon-hydrogen bond of the hydrogen-containing silicone oil, and the formed cross-linking system has a very good flexibility. The combined use of methyl hydrogen silicone oil and room temperature vulcanized silicone rubber can improve the flexibility of a single silicone rubber coating, and then by adjusting the ratio of crosslinking agent and catalyst, the coating has outstanding performance in terms of flexibility and can be well adapted to ethylene-propylene oxide. Rubber surface.

Description

technical field [0001] The invention belongs to the technical field of heat-resistant coatings, and relates to a flexible thermal-protective coating, a flexible thermal-protective coating for ethylene-propylene rubber and a preparation method thereof. Background technique [0002] The main chain of EPDM rubber is composed of stable saturated hydrocarbons, and only contains unsaturated double bonds in the side chains, which belongs to a saturated rubber; due to the non-polar substituents in the molecular structure, the cohesion energy between molecules is low, and the molecular chain It can maintain flexibility in a wide temperature range, and its unique chemical structure makes its vulcanized products have excellent performance. Therefore, ethylene-propylene rubber has valuable properties such as excellent weather resistance, ozone resistance, electrical insulation, low compression set, high strength and high elongation, making it widely used and its consumption increasing y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D183/05C09D7/61C08J7/06C08J7/043C08J7/04C08L23/16
CPCC09D183/04C09D5/18C08J7/065C08J7/043C08J7/042C08J2323/16C08J2483/04C08L83/04C08K7/28C08K3/34C08K7/24C08K7/26
Inventor 陈建兵
Owner 陕西天蓝新材料科技有限公司
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