A kind of double crosslinking point monomer carboxylic acid type acrylate rubber and its preparation method

An acrylate and carboxylic acid type technology, used in the rubber field, can solve the problems of inability to take into account other properties, use restrictions, affect low temperature performance, etc. burn effect

Active Publication Date: 2021-08-10
GUANGZHOU SHINE POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN03813660.0 discloses an acrylic rubber, a crosslinkable acrylic rubber composition, and a molded product, in order to provide an acrylic rubber that does not cause scorching at the initial stage of processing and can form an acrylic rubber with excellent heat resistance and compression set For cross-linked molded products, the solution is that the monomers at the cross-linking point contain butenedioic acid monoester compounds with alicyclic structures, and the monoesters are esters with ester ring structures such as cyclohexyl ester, cyclopentyl monoester, etc. Fat, but butenedioic acid mono-advanced monocyclic ester is difficult to synthesize, high toxicity, limited use, no improvement in vulcanization extrusion performance
[0006] Patent CN03811996.X discloses an acrylic rubber composition and a cross-linked product, which provides a cross-linked product that does not adhere to the metal surface during kneading, does not cause scorching during processing, and is excellent in heat resistance, cold resistance and inferior oil resistance acrylate rubber composition, the solution is to mix a specific crosslinking agent and a specific amine compound with carboxyl group-containing acrylic rubber derived from methacrylonitrile structural units, but methacrylonitrile will greatly affect low-temperature performance, and at the same time The crosslink density is also affected, and finally other properties cannot be taken into account

Method used

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  • A kind of double crosslinking point monomer carboxylic acid type acrylate rubber and its preparation method
  • A kind of double crosslinking point monomer carboxylic acid type acrylate rubber and its preparation method
  • A kind of double crosslinking point monomer carboxylic acid type acrylate rubber and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] S1. Add 50 parts of deionized water into the emulsification tank, then add 4 parts of sodium dodecylsulfonate, and 0.3 parts of ammonium persulfate are dissolved by mechanical stirring to obtain the solution A of the emulsifier;

[0057] S2. Mix 60 parts of ethyl acrylate, 25 parts of butyl acrylate, 12 parts of methoxyethyl acrylate, 2 parts of monoethyl maleate, 1 part of diethylene glycol monobutyl ether maleate and 0.05 parts of n- After the dodecyl mercaptan is mixed evenly, the monomer mixed phase B is obtained;

[0058] S3. Add the monomer mixed phase B to the solution A of the emulsifier, emulsify at room temperature and under the protection of nitrogen, and the emulsification time is 30 minutes to obtain the mixture emulsion C;

[0059] S4. Add 100 parts of water into the reaction kettle, maintain under the protection of nitrogen, stir and raise the temperature to 60°C;

[0060] S5. Transfer 1 / 5 parts by weight of the mixture emulsion C to the reactor, and und...

Embodiment 2

[0065] S1. Add 80 parts of deionized water into the emulsification tank, then add 3 parts of sodium dodecylsulfonate, and 0.3 parts of ammonium persulfate are dissolved by mechanical stirring to obtain the solution A of the emulsifier;

[0066] S2. Mix 5 parts of methyl propylene, 45 parts of ethyl acrylate, 18 parts of butyl acrylate, 24 parts of methoxyethyl acrylate, 5 parts of monoethyl maleate, 3 parts of diethylene glycol monobutyl maleate After the ether ester and 0.1 part of n-dodecyl mercaptan are uniformly mixed, the monomer mixed phase B is obtained;

[0067] S3. Add the monomer mixed phase B to the solution A of the emulsifier, emulsify at room temperature and under the protection of nitrogen, and the emulsification time is 30 minutes to obtain the mixture emulsion C;

[0068] S4. Add 120 parts of water into the reaction kettle, maintain under the protection of nitrogen, stir and raise the temperature to within the range of 70°C;

[0069] S5. Transfer 1 / 5 part by ...

Embodiment 3

[0074] S1. Add 80 parts of deionized water to the emulsification tank, then add 2 parts of sodium dodecylbenzenesulfonate, and 0.3 parts of potassium persulfate are dissolved by mechanical stirring to obtain the solution A of the emulsifier;

[0075] S2. Mix 45 parts of ethyl acrylate, 20 parts of butyl acrylate, 30 parts of methoxyethyl acrylate, 3 parts of monobutyl maleate, 2 parts of diethylene glycol monobutyl ether maleate and 0.08 parts After the n-dodecyl mercaptan is mixed evenly, the monomer mixed phase B is obtained;

[0076] S3. Add the monomer mixed phase B to the solution A of the emulsifier, emulsify at room temperature and under the protection of nitrogen, and the emulsification time is 30 minutes to obtain the mixture emulsion C;

[0077] S4. Add 220 parts of water into the reaction kettle, maintain the nitrogen protection, stir and raise the temperature to within the range of 75°C;

[0078] S5. Transfer 1 / 5 part by weight of the mixture emulsion C to the rea...

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Abstract

The invention discloses a double crosslinking point monomer carboxylic acid type acrylate rubber and a preparation method thereof. The carboxylic acid type acrylate rubber is obtained by polymerizing the following monomers calculated by mass percentage: 65%-85% of alkyl acrylate monomers; 10%-30% of oil-resistant and low-temperature resistant monomers; 3%-30% of vulcanization point monomers 8%; wherein, the vulcanization point monomers include butenedioic acid diester monomers and ethylenically unsaturated monomers containing carboxyl groups, and the butenedioic acid diester monomers and carboxyl group-containing The mass ratio of the ethylenically unsaturated monomers in the group is 1:2 to 2:3; the ester group in the butenedioic acid diester monomer is an ether alcohol with 6 to 10 carbon atoms. The rubber prepared by the present invention further improves the processing performance and improves the smoothness of the rubber surface on the basis of retaining the low compression set rate, oil resistance and heat resistance of the carboxylic acid type acrylate rubber, and the obtained acrylate vulcanizate composition can be used for Preparation of hydraulic oil pipes, cylinder gaskets, gaskets and other components for automobiles and locomotives.

Description

technical field [0001] The invention relates to the field of rubber, more specifically, the invention relates to a double crosslinking point monomer carboxylic acid type acrylate rubber and a preparation method thereof. Background technique [0002] Acrylate rubber (ACM) is an elastomer prepared by copolymerization of acrylate as the main monomer. It is widely used in various resistant materials because of its excellent properties such as heat resistance, aging resistance, oil resistance, ozone resistance, and ultraviolet In the environment of high temperature and oil resistance, especially in the field of automobiles (crankshaft, valve stem, cylinder head gasket, hydraulic oil pipeline, etc.), it has the reputation of "automotive glue". The comonomers of acrylate rubber can be divided into main monomers, low temperature oil resistant monomers and crosslinking point monomers. Commonly used main monomers include methyl acrylate, ethyl acrylate, butyl acrylate and 2-ethylhexy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/28C08F222/16C08F222/14C08F220/14C08F222/02C08L33/08C08K13/02C08J3/24
CPCC08F220/18C08J3/24C08K13/02C08J2333/08C08L2201/08C08L33/08C08F220/281C08F220/14C08F220/1804C08F222/02C08F222/102C08F220/1802C08F222/16C08F220/285C08F220/1805
Inventor 韩泽明胡龙罗燕群
Owner GUANGZHOU SHINE POLYMER TECH
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