Fluororubber-grated-maleic anhydride bulking agent and preparing method thereof

Abstract

The invention discloses a fluororubber-grated-maleic anhydride bulking agent and a preparing method thereof. The preparing method is that: raw fluororubber, fluororubber, initiating agents, vulcanizing agents and accelerants are filled into an internal mixer for reacting for 10-30min at temperature of 120-160 DEG C and with rotating speed to be 50-100r / min to obtain the fluororubber-grated-maleic anhydride (KFM-g-MAH) bulking agent. KFM-g-MAH performance of the bulking agent and carbonyl groups / carboxyl groups and other polar groups in polar acrylic polymer have strong interaction, and simultaneously can react with polar groups (amino groups and carboxyl groups) of acrylic polymer (ACM) and epoxy groups to achieve the reactive compatibilization effect. By aid of selection of the initiating agents, reactant activation energy is reduced, and accordingly high grating efficiency is achieved. The fluororubber-grated-maleic anhydride bulking agent and the preparing method thereof have the advantages that grating efficiency is obviously improved and compatibilization effect is good and stable.

Description

technical field [0001] The invention relates to a compatibilizer, specifically a fluorine rubber grafted maleic anhydride compatibilizer, and also relates to a preparation method thereof. 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 se...

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] When blending fluororubber and double-active acrylate rubber (AECM), due to the difference in molecular structure and polarity of the blended phase, the compatibility of the two is not good, which seriously affects the bonding performance. Therefore, it is necessary to use compatibilization agent to improve the compatibility between the two glues