High-temperature-resistant polyacrylate composition and preparation method thereof

A technology of polyacrylate and acrylic esters, which is applied in the field of acrylic rubber and its preparation, can solve the problems of not significantly increasing the temperature of thermal weight loss, and achieve the effect of mild conditions

Pending Publication Date: 2017-05-31
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

According to the thermogravimetric analysis, the two methods did not significantly increase the temperature of the beginning thermogravimetric loss.

Method used

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  • High-temperature-resistant polyacrylate composition and preparation method thereof
  • High-temperature-resistant polyacrylate composition and preparation method thereof
  • High-temperature-resistant polyacrylate composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: The preparation method of the high temperature resistant polyacrylate composition of this embodiment:

[0024] 1) formula comprises by weight:

[0025]

[0026]

[0027] 2) Dilute cumene hydroperoxide, sodium bisulfite, dilute hydrochloric acid and polyacrylamide with deionized water into a 1% solution for later use;

[0028] 3) Put methoxyethyl acrylate, monoethyl maleate, dicumyl xanthate, deionized water, disproportionated rosin soap, and sodium dodecylsulfonate into a stirring vessel, stir for 1 hour, and pass into 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 temperatur...

Embodiment 2

[0029] Embodiment 2: The preparation method of the high temperature resistant polyacrylate composition of this embodiment:

[0030] 1) formula comprises by weight:

[0031]

[0032] 2) Dilute azobisisobutyronitrile, ferrous sulfate, and calcium chloride with deionized water into a 1% solution for later use;

[0033] 3) Put methyl acrylate, monobutyl itaconate, n-dodecyl mercaptan, deionized water, and sodium lauryl sulfate into a stirring container, stir for 1 hour, and blow in 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, calcium chloride is added to precipitate white rubber particles, and the fi...

Embodiment 3

[0034] Embodiment 3: The preparation method of the high temperature resistant polyacrylate composition of this embodiment:

[0035] 1) formula comprises by weight:

[0036]

[0037] 2) Dilute ammonium persulfate, sodium sulfite, polyacrylamide, and sodium chloride into a 1% solution with deionized water for subsequent use;

[0038] 3) Put methyl acrylate, methacrylic acid, deionized water, and sodium lauryl sulfate into a stirring container, stir for 1 hour, and blow nitrogen gas. 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, sodium chloride and polyacrylamide are added to precipitate white rubber particl...

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Abstract

The invention discloses a high-temperature-resistant polyacrylate composition and a preparation method thereof. The high-temperature-resistant polyacrylate composition is a copolymer of an acrylic monomer and a carboxylic acid cross-linking monomer. The preparation method comprises the following steps: adding a raw material, namely the acrylic monomer, a raw material, namely the carboxylic acid cross-linking monomer, and a conditioning agent into an emulsifier solution, and in the presence of nitrogen for protection, initializing a copolymerization reaction through free radicals; after the copolymerization reaction is completed, adding a reducing agent for aftertreatment; finally, adding a polycoagulant for demulsification, bleaching with clean water, and dehydrating, thereby obtaining a composition product. Thermogravimetic analysis shows that the initial thermogravimetic weight of the high-temperature-resistant polyacrylate composition is 235-240 DEG C, and the high-temperature-resistant polyacrylate composition can be used for a long time under a condition within 190 DEG C; in addition, no extra heat exchange means are taken in the preparation method of the high-temperature-resistant polyacrylate composition, the temperature rise of a reaction system is within 20 DEG C, the polymerization conversion rate is as high as 98-99%, conditions are gentle, and industrial application conditions can be completely met.

Description

technical field [0001] The invention relates to the technical field of rubber synthesis, in particular to an acrylic rubber and a preparation method thereof. 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 gask...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C08F220/14C08F222/16C08F220/06
CPCC08F220/14C08F220/28C08F220/281C08F222/16C08F220/1808
Inventor 胡东
Owner 鑫泓裕重庆复合材料有限公司
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