Preparation method of low-compression permanent-deformation carboxylic acrylate rubber

A permanent deformation, acrylate technology, applied in the field of preparation of low compression set carboxylic acid acrylate rubber, can solve the problems of poor processing and extrusion performance, poor safety factor, poor compression set

Inactive Publication Date: 2015-11-25
CHANGZHOU HAIBA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Acrylate rubber is a functional polymer material made of acrylate as the main component and copolymerized with a small amount of monomers with active groups. It has properties such as high temperature resistance, ozone resistance, weather aging resistance, and oil resistance. It has special advantages in the oil-resistant rubber products used under the environment, and can also be used together with butyl rubber, fluorine rubber, silicone rubber, EPDM rubber, etc., and is widely used in automobile, aerospace, chemical, pharmaceutical and transportation industries. At present, the domestic application Mainly products from the United States and Japan. Domestic products are difficult to completely replace imported products due to their shortcomings such as poor compression set, poor processing and extrusion performance, and poor safety factor in the production process.

Method used

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  • Preparation method of low-compression permanent-deformation carboxylic acrylate rubber

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Experimental program
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Effect test

Embodiment 1

[0016] 70% of ethyl acrylate, 23% of butyl acrylate, 1% of maleic acid, 0.015% of regulator butyl, 2% of sodium dodecyl sulfonate, and deionized water as the balance, pre-heated at 48°C in nitrogen. emulsification. After the emulsification is uniform, lower the temperature to 43°C, initiate with 0.025% initiator, raise the temperature to 60°C at 1°C / min, add 1.4 times the initial amount of regulator D; continue to raise the temperature to 70°C at 1°C / min, and add 0.3% of the initial amount When heating up to 88°C at 1°C / min, add 0.3 times the initial amount of initiator; add 0.1 times the initial amount of initiator after holding for 50 minutes. The obtained polymer is aged, steam stripped and purged to remove residual monomers and low molecular substances; the acrylate rubber emulsion is diluted to 2 times the original, and coagulated with a total amount of 7% sodium chloride electrolyte After coagulation, it is washed continuously with deionized water until there is no emul...

Embodiment 2

[0018] 70% ethyl acrylate, 20% butyl acrylate, 5% methoxyethyl acrylate, 3% maleic acid, 0.025% regulator, 2.5% sodium lauryl sulfate, and deionized balance Water, pre-emulsified at 50°C under nitrogen. After the emulsification is uniform, lower the temperature to 44°C, initiate with 0.025% initiator, raise the temperature to 63°C at 1°C / min, add 1.5 times the initial amount of regulator D; continue to raise the temperature to 73°C at 1°C / min, add 0.5% of the initial amount When heating up to 90°C at 1°C / min, add 0.5 times the initial amount of initiator; add 0.2 times the initial amount of initiator after holding for 60 minutes. The resulting polymer is aged, steam stripped and purged to remove residual monomers and low-molecular substances; the acrylate rubber emulsion is diluted to 2.5 times the original, and coagulated with a total amount of 8% calcium chloride electrolyte After coagulation, it was washed continuously with deionized water until no emulsifier and electroly...

Embodiment 3

[0020] 80% ethyl acrylate, 15% methoxy ethyl acrylate, 4% maleic acid, using 0.035% regulator butadiene, adding 3% sodium lauryl sulfate, and the balance is deionized water, carried out in nitrogen Pre-emulsified at 53°C. After the emulsification is uniform, lower the temperature to 45°C, initiate with 0.026% initiator, raise the temperature to 65°C at 1°C / min, add 1.6 times the initial amount of regulator D; continue to raise the temperature to 75°C at 1°C / min, and add 0.6% of the initial amount When heating up to 92°C at 1°C / min, add 0.6 times the initial amount of initiator; add 0.3 times the initial amount of initiator after keeping warm for 60 minutes. The obtained polymer is aged, steam stripped and purged to remove residual monomers and low-molecular substances; the acrylate rubber emulsion is diluted to 3 times the original, and coagulated with 10% of the total amount of calcium chloride electrolyte After coagulation, it is washed continuously with deionized water unt...

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Abstract

The invention relates to a preparation method of low-compression permanent-deformation carboxylic acrylate rubber. The preparation method includes: using an acrylate monomer and a maleic carboxylic cross-linked monomer as monomer mixed materials, performing pre-emulsification in nitrogen with regulator D, mixing peroxide and sodium hydrogen sulfite to allow initiating, adding initiator and the regulator D by several times during the initiating period, and subjecting obtained polymer to ageing, steam stripping and purging, gelling and drying to obtain a product, the low-compression permanent-deformation carboxylic acrylate rubber. The product is up to 38-42 in Mooney viscosity, 3-4 in intrinsic viscosity and less than 20% in compression set, and processing and extrusion safety of the product is greatly improved.

Description

technical field [0001] The invention is designed in the field of rubber synthesis, especially the preparation method of low compression set carboxylic acid type acrylate rubber. Background technique [0002] Acrylate rubber is a functional polymer material made of acrylate as the main component and copolymerized with a small amount of monomers with active groups. It has properties such as high temperature resistance, ozone resistance, weather aging resistance, and oil resistance. It has special advantages in oil-resistant rubber products used under the environment, and can also be used together with butyl rubber, fluororubber, silicone rubber, EPDM rubber, etc., and is widely used in automobiles, aerospace, chemical, pharmaceutical and transportation industries. At present, the domestic application Mainly for the products of the United States and Japan, domestic products are difficult to completely replace imported products due to their shortcomings such as poor compression ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/28C08F2/24C08F2/38
Inventor 李梦雪
Owner CHANGZHOU HAIBA RUBBER CO LTD
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