Core-shell type double active acrylate elastomer and preparation method thereof

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...

AI Technical Summary

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 used together, and fluororubber is used together with some general-purpose rubber and special rubber , in order to obtain materials with better performance and lower cost

[0006] Blending modification is a better method, but it has the following disadvantages: (1) The cost performance of the new fluororubber is not high

[0007] Acrylate rubber (ACM) itself is a special rubber with excellent high temperature resistance, oil resistance and aging resistance, but there are still deficiencies in the low temperature resistance and tear resistance of modified fluororubber.