Core-shell type double-active acrylate elastic body and preparation method thereof
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An acrylate, dual-active technology, applied in the field of core-shell type dual-active acrylate elastomer, can solve the problems of low cost performance of new fluororubber, limited promotion and application, high production cost, and achieve good comprehensive performance of the film, Good stability and high temperature resistance
Active Publication Date: 2013-02-27
GUANGZHOU GLORYSTAR CHEM
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Problems solved by technology
At present, there are two main directions for the modification of fluororubber: first, through the main chain modification, such as the development of fluoroether rubber and fluorosilicone rubber, ether bonds are introduced into the main chain of fluororubber, which increases the flexibility of the molecule and makes Its low-temperature performance is greatly improved while retaining the original characteristics of fluororubber, but its promotion and application are greatly limited due to the high cost of development and production; the second is that rubber is
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Embodiment 1
[0024] Add 70 parts of methyl acrylate, 55 parts of methoxyethyl acrylate, and 15 parts of sodium acrylamide isopropyl sulfonate into the kneader, raise the temperature to 62°C, keep the temperature for 0.8 hours, and then add benzoyl peroxide 10 parts and potassium persulfate-sodium bisulfite 5 parts, under the protection of nitrogen, heat up to 83°C, keep warm for 1.7h, and finally cool to 43°C to obtain a core-shell type dual-active acrylate elastomer.
Embodiment 2
[0026] Add 80 parts of ethyl acrylate, 75 parts of methyl methacrylate, and 20 parts of sodium salt of alcohol ether sulfosuccinate containing double bonds into the kneader, raise the temperature to 90°C, keep the temperature for 1.2 hours, and then add over 8 parts of benzyltriphenylphosphorous chloride and 6 parts of ammonium persulfate-sodium bisulfite, under the protection of nitrogen, heat up to 80°C, keep the temperature for 1.5h, and finally cool to 40°C to obtain core-shell type biactive acrylic acid Ester elastomers.
Embodiment 3
[0028] Add 100 parts of butyl acrylate, 80 parts of hydroxyethyl methacrylate, and 30 parts of sodium vinyl sulfonate into the kneader, raise the temperature to 70°C, keep the temperature for 1.0 h, and then add 17 parts of calcium hydroxide and chloric acid 8 parts of sodium-sodium sulfite were heated up to 100°C under the protection of nitrogen, kept for 2.0 hours, and finally cooled to 50°C to obtain a core-shell type dual-active acrylate elastomer.
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Abstract
The invention discloses a preparation method of a core-shell type double-active acrylate elastic body. The preparation method is characterized by specifically comprising the following steps of: adding an acrylate monomer, acrylate containing active groups, and a compound emulsifying agent in a kneading machine, heating to 60-90 DEG C, keeping a temperature and reacting for 0.8-1.2 h, and then, adding a vulcanizing agent and an oxidation-reduction initiator, under the protection of nitrogen, heating to 80-100 DEG C, keeping the temperature and reacting for 1.5-2.0 h, and finally, cooling to 40-50 DEG C to obtain the core-shell type double-active acrylate elastic body. The core-shell type double-active acrylate elastic body is obtained through an emulsion polymerization method and has a core-shell structure; the combination property of an adhesive film is favorable; the core-shell type double-active acrylate elastic body is applied to a sealing fluorine rubber; and the sealing fluorine rubber can be enabled to have higher high temperature resistance, oil resistance, ageing resistance, low temperature resistance and tear resistance performances.
Description
technical field [0001] The invention belongs to polyacrylate elastomers, in particular to a core-shell type double-active acrylate elastomer, especially a preparation method. Background technique [0002] Fluorine rubber (FKM) is a synthetic polymer elastomer containing fluorine atoms on the carbon atoms of the main chain or side chains. It is widely used in aerospace, military industry, national defense, automobile, petrochemical and many other fields. Viton products are mainly used in seals, gaskets, gaskets, diaphragms, hoses, oil seals, linings, anti-corrosion products and electrical insulation products. [0003] The most widely used fluorine rubber is in the automotive field, accounting for 60-70% of the total application. In auto parts, it can be used as sealing material for engine fuel hose, refueling hose, fuel pump, air conditioner O-ring, injection device, power piston, valve stem, crankshaft, and air conditioner compressor. During use, automotive seals made of r...
Claims
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