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Cold-resistant acrylate rubber

A technology of acrylate and ethyl acrylate, which is applied in the field of synthetic acrylate rubber, can solve the problems that cannot meet the requirements of cold resistance of auto parts, etc., and achieve the effect of good post-processing performance and good comprehensive physical properties

Inactive Publication Date: 2011-04-27
JIUJIANG SHILONG RUBBER
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in terms of cold resistance, the lowest glass transition temperature of domestic rubber is -25°C, which has not been able to meet the cold resistance requirements of auto parts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Embodiment, a cold-resistant acrylic rubber, which is formed by copolymerization of ethyl acrylate, butyl acrylate and vinyl chloroacetate. The specific ingredients are as follows:

[0023] Butyl acrylate: 48.5%

[0024] Ethyl acrylate: 48.5%

[0025] Vinyl chloroacetate: 3%

[0026] Synthesized by emulsion polymerization process, the initiation temperature during polymerization is between 5-50°C, the coagulation temperature is between 20-70°C, and the Tg of the synthetic glue is ≤ -30°C.

[0027] Its preparation method and specific steps are as follows:

[0028] 1. Three basic monomer ingredients are used:

[0029] Butyl acrylate: 48.5%

[0030] Ethyl acrylate: 48.5%

[0031] Vinyl chloroacetate: 3%

[0032] Mix the above three basic monomers in proportion in a premix tank to make a hydrocarbon phase solution for later use. Put the emulsifier solution with a concentration of 3% into the reaction kettle according to a certain proportion, and mix thoroughly to mak...

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PUM

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Abstract

The invention relates to cold-resistant acrylate rubber. The main chain of the rubber is a saturated carbon chain, and the rubber is synthesized by an emulsion polymerization method. The scheme comprises the following steps of: fully emulsifying 40 to 90 mass percent of butyl acrylate, 30 to 60 mass percent of ethyl acrylate and 1 to 10 mass percent of vinyl chloroacetate with 1 to 10 percent emulsifier aqueous solution in a reaction kettle, performing polymerization reaction under the initiation of 0.0001 to 0.1 mass percent of initiator, demulsifying reaction liquid in 2 to 20 percent electrolyte salt solution, coagulating to form a white granular elastomer, and washing and drying to obtain a product. The invention has the advantages that: the cold-resistant acrylate rubber has high physical and mechanical properties and postprocessing property and can meet the requirements of automobiles, motorcycles and the like on rubber materials; and the finished product has high cold resistance, heat resistance and oil resistance.

Description

technical field [0001] The invention relates to a synthetic acrylic rubber, in particular to a cold-resistant acrylic rubber. Background technique [0002] Domestic cold-resistant acrylate rubber is an elastomer made of ethyl acrylate as the main monomer and chlorovinyl acetate as the vulcanization point monomer through emulsion polymerization. Because its main chain is a saturated structure, it has oil resistance and oxidation resistance. and other characteristics. Especially in terms of cold resistance, the lowest glass transition temperature of domestically produced rubber is -25°C, which has not been able to meet the cold resistance requirements of auto parts. [0003] The cold-resistant acrylic rubber used in China's automobile industry has been occupied by foreign raw rubber for a long time, and the glass transition temperature of domestic cold-resistant acrylic rubber cannot reach -30°C. The required raw rubber has a Tg≤-30°C. At the same time, it has other charact...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F218/04C08F2/22
Inventor 袁洪庆
Owner JIUJIANG SHILONG RUBBER
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