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A kind of low compression set carboxylic acid type acrylate rubber and preparation method thereof

An acrylate and permanent deformation technology, applied in the fields of processing and synthetic rubber compounding, can solve the problems of inability to reduce the compression set of the rubber compound, the effect of the compression set is not obvious, and improve the hardness and tensile strength of the rubber compound. Compression set performance, good compressive capacity, and the effect of improving coupling strength

Active Publication Date: 2021-07-30
四川青龙丙烯酸酯橡胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] It is effective in the case of insufficient vulcanization of the rubber compound, and the effect of reducing the compression set is not obvious under the condition of sufficient vulcanization.
[0015] These methods generally have some shortcomings, and cannot increase the hardness and tensile strength of the rubber while reducing the compression permanent deformation of the rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] A preparation method of low compression set carboxylic acid type acrylate rubber, comprising the following steps:

[0034] Carboxylic acid type acrylate rubber, fast extruded carbon black, precipitated white carbon black, processing aid and anti-aging agent are added into an open mill for the first mixing to obtain the first mixed rubber. The specific steps of the first mixing in the embodiment of the present invention are as follows: (1) Weigh the carboxylic acid type acrylate rubber, quick-extrusion carbon black, precipitated silica, processing aid and anti-aging agent according to the mixing ratio; (2) ) Turn on the mill, press stearic acid on the roller, and then put carboxylate acrylate rubber into the roller to make the rubber cover the roller, and adjust the roller distance to keep a small amount of glue on the roller; (3) put Quickly extrude carbon black, precipitated silica, and anti-aging agent and evenly add them to the roller for mixing. When adding half of...

Embodiment 1

[0039] A preparation method of low compression set carboxylic acid type acrylate rubber, comprising the following steps:

[0040] (1) Weigh the following raw materials by weight: acrylate rubber ACM-120: 100 parts; quick extrusion carbon black N-550: 25 parts; precipitated white carbon black: 25 parts; silane coupling agent Si-69: 2 anti-aging agent TK-100: 5 parts; stearic acid: 2 parts; No. 1 vulcanizing agent: 1 part; accelerator DOTG: 2 parts.

[0041] (2) Turn on the open mill, press stearic acid on the roller, and then put carboxylic acid-type acrylate rubber into the roller, so that the rubber covers the roller, and adjust the roller distance to keep a small amount of glue on the roller;

[0042] (3) Evenly add quick-extrusion carbon black, precipitated white carbon black, and anti-aging agent into the roller for mixing. When half of the quick-extruded carbon black and precipitated white carbon black are added, 3 / 4 cutting knife 1 on each side 2 times, and then add the...

Embodiment 2

[0055] A preparation method of low compression set carboxylic acid type acrylate rubber, comprising the following steps:

[0056] (1) Weigh the following raw materials by weight: acrylate rubber ACM-220: 100 parts; quick extrusion carbon black N-550: 25 parts; precipitated white carbon black 25 parts, silane coupling agent Si-69: 2 parts ; Antiaging agent TK-100: 5 parts; Stearic acid: 2 parts; No. 1 vulcanizing agent 1 part; Accelerator DOTG 2 parts;

[0057] The processing and detection method are the same as in Example 1, and the detection results are as shown in Table 1.

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Abstract

The invention provides a low compression set carboxylic acid type acrylate rubber and a preparation method thereof, belonging to the technical field of compounding and processing of synthetic rubber. A kind of low compression set carboxylic acid type acrylate rubber, its raw material comprises by weight parts: 100 parts of carboxylic acid type acrylate rubber, 10-50 parts of fast extrusion carbon black, 10-50 parts of precipitated white carbon black, 1-5 parts of silane coupling agent, 1-3 parts of No. 1 vulcanizing agent, 1-4 parts of accelerator, 1-3 parts of processing aid and 2-5 parts of anti-aging agent, quick extrusion of carbon black and precipitated silica The mass ratio is 1:1. Not only has good low compression set performance, but also has good thermal stability, high hardness and high tensile strength. A method for preparing carboxylic acid acrylate rubber with low compression set. The silane coupling agent is added when the temperature of the rubber mixture is 50-70°C. The method is simple, and the prepared carboxylic acid acrylate rubber has good properties .

Description

technical field [0001] The invention belongs to the technical field of compounding and processing of synthetic rubber, and in particular relates to a low compression set carboxylic acid type acrylate rubber and a preparation method thereof. Background technique [0002] Acrylate rubber (ACM) is a kind of elastic material formed by the copolymerization of acrylate and monomers that can provide cross-linking reactive groups. Its main chain is a saturated structure, so it has heat resistance and UV radiation resistance. And ozone resistance; its side chain contains polar ester groups, so it also has excellent oil resistance. The main use of acrylate rubber is to make heat-resistant and oil-resistant seals and oil pipes, etc., mainly used in automobiles, motorcycles, power transformers, ships, petrochemical and other fields. [0003] Acrylic rubber has relatively large compression permanent deformation, which is a performance defect as a sealing material. Large deformation may ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/04C08K13/06C08K9/06C08K3/04C08K3/36C08K5/09C08K5/205C08K5/31
CPCC08K3/04C08K3/36C08K5/09C08K5/205C08K5/31C08K9/06C08K13/06C08L2201/08C08L33/04
Inventor 李照华唐坤明唐燕
Owner 四川青龙丙烯酸酯橡胶有限公司
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