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Process for preparing high Mooney viscosity polyacrylate compositions

A polyacrylate, high Mooney viscosity technology, used in the field of rubber synthesis, can solve the problems of too soft, insignificant effect, unfavorable processing, etc., and achieve the effect of mild conditions

Active Publication Date: 2019-04-23
鑫泓裕重庆复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Moreover, there is no crystalline segment in the structure of acrylate rubber, and the molecular cohesion is low. Therefore, the Mooney viscosity of the general product is about 30-40. Too soft is not conducive to processing, and the strength of the processed material is also low.
[0006] The existing solution is to introduce crystalline segments in the structure of acrylate rubber, such as ethylene acrylate rubber (AEM), however, the problem of being too soft for the product has not been solved
[0007] Usually, the Mooney viscosity of acrylate rubber can be improved by using seed polymerization or increasing the amount of emulsifier, but the effect is not obvious, and it also brings control and economic problems.

Method used

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  • Process for preparing high Mooney viscosity polyacrylate compositions
  • Process for preparing high Mooney viscosity polyacrylate compositions
  • Process for preparing high Mooney viscosity polyacrylate compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: The method for preparing the high Mooney viscosity polyacrylate composition in this embodiment:

[0028] 1) formula comprises by weight:

[0029]

[0030]

[0031] 2) Dilute cumene hydroperoxide, sodium bisulfite, dilute hydrochloric acid and polyacrylamide with deionized water into a 1% solution for later use;

[0032] 3) Put ethyl acrylate, monoethyl maleate, dicumyl xanthate, deionized water, disproportionated rosin soap, and sodium dodecyl sulfonate into a stirring container, stir for 1 hour, and blow in nitrogen. Heat the container to 40°C, stop heating, put in cumene hydroperoxide and half a quantity of sodium bisulfite, the temperature of the emulsion system starts to rise, and the polymerization reaction starts. The polymerization time is about 1 hour, and the temperature rises to the highest point of 59°C. Add half an amount of sodium bisulfite and continue stirring for 1 hour. After the container is cooled to normal temperature, dilute hy...

Embodiment 2

[0033] Embodiment 2: The method for preparing the high Mooney viscosity polyacrylate composition in this embodiment:

[0034] 1) formula comprises by weight:

[0035]

[0036]

[0037] 2) Dilute azobisisobutyronitrile, ferrous sulfate, and calcium chloride with deionized water into a 1% solution for later use

[0038] 3) Put ethyl acrylate, butyl acrylate, ethylene glycol methyl ether acrylate, allyl chloroacetate, n-dodecyl mercaptan, deionized water, and sodium lauryl sulfate into a stirring container, and stir for 1 hour , into the nitrogen. Heat the container to 20°C, stop heating, add azobisisobutyronitrile and half of ferrous sulfate, the temperature of the emulsion system starts to rise, and the polymerization reaction starts. The polymerization time is about 1 hour, and the temperature rises to the highest point of 38.8°C. Add half a quantity of ferrous sulfate, and continue to stir for 1 hour. After the container is cooled to normal temperature, add calcium c...

Embodiment 3

[0039] Embodiment three: the method for preparing high Mooney viscosity polyacrylate composition in this embodiment:

[0040] 1) formula comprises by weight:

[0041]

[0042] 2) Dilute ammonium persulfate, sodium sulfite, polyacrylamide, and sodium chloride into a 1% solution with deionized water for subsequent use;

[0043] 3) Put ethyl acrylate, butyl acrylate, methoxybutyl acrylate, allyl glycidyl ether, deionized water, and sodium lauryl sulfate into a stirring container, stir for 1 hour, and blow in nitrogen. Heat the container to 30°C, stop heating, put in ammonium persulfate and half of sodium sulfite, the temperature of the emulsion system starts to rise, and the polymerization reaction starts. The polymerization time is about 1 hour, and the temperature rises to the highest point of 49.1°C. Throw in half an amount of sodium sulfite and continue stirring for 1 hour. After the container is cooled to normal temperature, add sodium chloride and polyacrylamide to pre...

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Abstract

The invention discloses a method for preparing a high Mooney viscosity polyacrylate composition, which comprises the steps of: 1) adding acrylate monomer raw materials, crosslinkable monomer raw materials and regulators into an emulsifier aqueous solution; 2) adding One of potassium chloride, sodium chloride, potassium sulfate, sodium sulfate, potassium nitrate or sodium nitrate is added to the emulsifier aqueous solution, and the dosage is 1 / 10000 to 5 / 1000; 3) Under the protection of nitrogen, the copolymerization reaction is initiated by free radicals; 4) After the copolymerization reaction is completed, a reducing agent is added for post-treatment; 5) A coagulant is added to break the emulsion, rinsed with water, and dehydrated to obtain a combined product. According to the method for preparing the high Mooney viscosity polyacrylate composition of the present invention, the Mooney viscosity of the prepared acrylate rubber generally increases, and the highest can reach more than 80.

Description

technical field [0001] The invention relates to the technical field of rubber synthesis, in particular to a preparation method of acrylic rubber. Background technique [0002] Acrylate rubber (abbreviated as ACM) is an elastomer obtained by copolymerization of acrylate as the main monomer. Its main chain is a saturated carbon chain and its side groups are polar ester groups. Due to the special structure, it has many excellent properties, such as temperature resistance, oil resistance, aging resistance, compression resistance, no cracking, no smoke and harmful gases in the flame, as well as ozone resistance and ultraviolet resistance. Its mechanical properties and processing properties are superior to fluororubber and silicone rubber, and its heat resistance, oxygen aging and oil resistance are superior to nitrile rubber. It is widely used in various high temperature and oil resistant environments, especially for automobile crankshafts, valve stems, Cylinder gaskets, hydraul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F222/16C08F220/28C08F218/00C08F216/16C08F2/26C08F2/38
CPCC08F2/26C08F2/38C08F220/18C08F220/1804C08F220/282C08F218/20C08F220/1802C08F222/16C08F220/281C08F216/16
Inventor 胡东
Owner 鑫泓裕重庆复合材料有限公司
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