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Manufacturing method of acrylic rubber

A technology of acrylic rubber and its manufacturing method, which is applied in the field of manufacturing acrylic rubber, can solve problems such as not necessarily sufficient and unable to meet the requirements of tensile strength, and achieve the effects of inhibiting dirt, high tensile strength, and excellent heat resistance

Active Publication Date: 2022-03-11
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional acrylic rubber such as the acrylic rubber described in Patent Document 1 has a certain degree of tensile strength, but it is not necessarily sufficient, so it may not be able to meet recent requirements for tensile strength.

Method used

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  • Manufacturing method of acrylic rubber
  • Manufacturing method of acrylic rubber

Examples

Experimental program
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Effect test

Embodiment

[0150] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. In addition, unless otherwise indicated, the "part" in each example is a basis of weight.

[0151] Various physical properties were evaluated by the following methods.

[0152] [Mooney viscosity (ML1+4, 100℃)]

[0153] The Mooney viscosity (polymer Mooney) of acrylic rubber was measured in accordance with JIS K6300.

[0154] [Content of aggregates in emulsion polymerization solution after emulsion polymerization]

[0155] For the emulsion polymerization liquid after the emulsion polymerization, the content ratio of the solid content (the ratio when the whole emulsion polymerization liquid is taken as 1) is measured, and then 100 g of the emulsion polymerization liquid after the emulsion polymerization is accurately weighed, and then a known weight is used. The 200-mesh SUS metal mesh was filtered, and the agglomerate on the metal mesh was washed se...

manufacture example 1

[0173] In a mixing vessel with a homogenizer, 46.294 parts of pure water, 49.3 parts of ethyl acrylate, 49.3 parts of n-butyl acrylate, 1.4 parts of mono-n-butyl fumarate, and 0.567 parts of anionic surfactant were added Sodium lauryl sulfate (trade name "EMAL 2FG", manufactured by Kao Corporation) and 1.4 parts of polyoxyethylene lauryl ether (trade name "EMULGEN 105" as a nonionic surfactant, weight average molecular weight : about 1500, manufactured by Kao Corporation), and stirring was performed to obtain a monomer emulsion.

[0174] Next, 170.853 parts of pure water and 2.97 parts of the monomer emulsion obtained above were put into a polymerization reaction tank equipped with a thermometer and a stirring device, and cooled to a temperature of 12°C under nitrogen flow. Next, 145.29 parts of the monomer emulsion obtained above, 0.00033 parts of ferrous sulfate as a reducing agent, 0.264 parts of sodium ascorbate as a reducing agent, and 7.72 parts of 2.85% by weight persul...

manufacture example 2

[0180] Using the emulsion polymerization liquid obtained in the same manner as in Production Example 1, 3-(3,5-di-tert- The addition amount of the 50% by weight aqueous dispersion of octadecyl butyl-4-hydroxyphenyl)propionate was changed from 0.1 part to 0.3 part (with respect to 100 parts of the monomer added when producing the emulsion polymerization liquid) Except for the total of 0.5 part in terms of the anti-aging agent), the preparation of the mixed solution and the coagulation operation were carried out in the same manner as in Production Example 1, and the water-containing aggregate of the acrylic rubber (A2) was obtained.

[0181] Next, in the same manner as in Production Example 1, the obtained water-containing pellets of acrylic rubber (A2) were washed with water, acid washed, washed with pure water, and dried using a hot air dryer four times to obtain a solid acrylic rubber (A2) . The Mooney viscosity (ML1+4, 100° C.) of the obtained acrylic rubber (A2) was 33, and ...

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Abstract

The present invention provides a method for producing acrylic rubber, comprising the following steps: an emulsion polymerization step of obtaining an emulsion polymerization liquid by emulsion polymerization of monomers used to form the above-mentioned acrylic rubber; adding an antiaging agent in the state of a solution or a dispersion liquid A step of adding an anti-aging agent to the above-mentioned emulsion polymerization solution, and a coagulation step of adding a coagulating agent to the emulsion polymerization solution to which the above-mentioned anti-aging agent is added to obtain water-containing aggregates.

Description

technical field [0001] The present invention relates to a method for producing acrylic rubber, and more particularly, to acrylic acid capable of appropriately suppressing the generation of fouling in a polymerization apparatus during polymerization and capable of forming a rubber cross-linked product having high tensile strength and excellent heat resistance Manufacturing method of rubber. Background technique [0002] Acrylic Rubber is a polymer mainly composed of acrylate, and is generally known as a rubber excellent in heat resistance, oil resistance and ozone resistance, and is widely used in automobile-related fields. [0003] Such acrylic rubbers can generally be produced by a method (refer, for example, to Patent Document 1), by adding a coagulant to the emulsion polymerization liquid obtained by emulsion polymerization of a monomer mixture constituting the acrylic rubber, and adding a coagulant to the emulsion polymerization. The liquid is coagulated, and the water-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/215C08J3/24C08L13/00C08L33/00
CPCC08J3/215C08J3/24C08L13/00C08L33/00C08L33/08C08F220/1802C08F220/1804C08F222/14C08F20/10C08F2/002C08F2/24C08F2/44C08F6/22C08F6/16C08K5/005C08K5/134C08F2500/21C08F2810/20
Inventor 佐藤奖增田浩文
Owner ZEON CORP
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