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Acrylic copolymer and rubber material

A technology of acrylic copolymers and copolymers, which is applied in the field of rubber materials, can solve problems such as the improvement of mechanical properties such as strength and modulus that are not recorded, and achieve the effects of excellent processability and excellent heat resistance

Active Publication Date: 2021-02-05
OSAKA SODA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, although the rate of change in elongation after air heating aging is described, it does not describe the improvement of mechanical properties such as strength and modulus

Method used

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  • Acrylic copolymer and rubber material
  • Acrylic copolymer and rubber material
  • Acrylic copolymer and rubber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] (Manufacture of Acrylic Copolymer A)

[0122] In a polymerization reactor with a thermometer, a stirring device, a nitrogen inlet pipe and a decompression device, 200 parts by mass of water, 1.7 parts by mass of polyoxyalkylene alkyl ether phosphate, and 49.3 parts by mass of ethyl acrylate as a monomer are charged parts, 48.8 parts by mass of n-butyl acrylate, 0.5 parts by mass of N-(4-anilinophenyl) maleimide, and 1.4 parts by mass of monoethyl fumarate, repeated degassing and nitrogen gas using reduced pressure Replacement, after fully removing oxygen, add 0.1 mass part of sodium ascorbate and 0.1 mass part of potassium persulfate, start the emulsion polymerization reaction at normal pressure and normal temperature, continue the reaction until the polymerization conversion rate reaches 95%, add 0.0075 mass part of hydroquinone, stop polymerization. The obtained emulsion polymerization solution was coagulated with an aqueous sodium sulfate solution, washed with water...

Embodiment 2

[0124] (Manufacture of acrylic copolymer B)

[0125] Compared with Example 1, the monomers charged and their amount are changed to 49.3 parts by mass of ethyl acrylate, 48.3 parts by mass of n-butyl acrylate, and 1.0 parts by mass of N-(4-anilinophenyl) maleimide parts, and 1.4 parts by mass of monoethyl fumarate, the same procedure as in Example 1 was performed to obtain an acrylic acid copolymer B.

Embodiment 3

[0127] (Manufacture of acrylic copolymer C)

[0128] Compared with Example 1, the monomers charged and their amount are changed to 49.3 parts by mass of ethyl acrylate, 44.0 parts by mass of n-butyl acrylate, 4.8 parts by mass of methyl methacrylate, N-(4-anilinobenzene Base) Except 0.5 mass parts of maleimides, and 1.4 mass parts of monoethyl fumarates, it carried out similarly to Example 1, and obtained the acrylic acid copolymer C.

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Abstract

The purpose of the present invention is to provide: an acrylic copolymer for providing a highly heat-resistant rubber material having a small rate of change in strength without a reduction in elongation, even under long-term high temperature conditions; and a composition containing the acrylic copolymer. Provided are: an acrylic copolymer containing a structural unit (A) derived from a monomer containing a structure having a maleimide skeleton, a structural unit (B) derived from an acrylic acid alkyl ester and / or an acrylic acid alkoxyalkyl ester, and a structural unit (C) derived from an unsaturated monomer having a crosslinking group; a composition containing the acrylic copolymer and a crosslinking agent; and a rubber material prepared from the composition.

Description

technical field [0001] The present invention relates to an acrylic copolymer and its rubber material. More specifically, it relates to an acrylic copolymer capable of providing a rubber material with excellent heat resistance that is difficult to decrease in mechanical properties such as strength even when exposed to high temperatures for a long time, and an acrylic copolymer made of acrylic acid. Rubber material made of copolymer. Background technique [0002] In general, acrylic polymers are polymers based on (meth)acrylate, and are known to be excellent in various physical properties regarding durability, and are widely used in engine gaskets, oil hoses, and air hoses. , O-rings and other industrial rubber materials, rubber materials for automobiles. [0003] However, for such rubber members for automobiles, especially rubber members used in the engine room, due to the high performance of the supercharger (turbocharger) accompanied by the high output of the engine and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F222/40C08L33/04
CPCC08K3/04C08K5/0025C08F220/1802C08L35/02C08L35/04C08F220/1804C08F222/16C08F222/406C08F222/404C08L33/24C08F220/18C08F220/22C08F220/325C08F222/40C08L33/10C08L33/08C08L2201/08C08L2312/00
Inventor 冈田凉宇渡真一北川纪树内藤雅嗣
Owner OSAKA SODA CO LTD
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