Chloroprene rubber/butyl rubber sealing gasket and its preparation method

Abstract

The invention discloses a chloroprene rubber / butyl rubber sealing gasket. The sealing gasket comprises the following raw materials, by weight, 135-145 parts of chloroprene rubber CR121, 10-15 parts of butyl rubber CBK139, 10-15 parts of brominated butyl rubber 1066, 3-5 parts of propanediol sebacate polyester, 2-5 parts of n-butyl methacrylate, 1-2 parts of imarcaptoacetate dioctyltin and 1-2 parts of zinc stearate. The sealing gasket has the advantages of good high-temperature resistance, good sealing performance, good flame retardation, good corrosion resistance, realization of long-term working in mediums comprising acids, alkalis, oils and the like, small volume and hardness changes, no adhesion on metal surfaces, small friction coefficient, good abrasion resistance, good bonding flexibility with the sealing surface, good weather ageing resistance, good ozone ageing resistance, durability and the like.

Description

technical field

[0001] The invention relates to a gasket, in particular to a neoprene / butyl rubber gasket and a preparation method thereof. Background technique

[0002] Gasket is a material used for sealing inside machinery, equipment, pipelines, etc. The gaskets currently used are mostly rubber gaskets, which are characterized by high temperature resistance, ozone resistance, natural aging resistance, vacuum resistance, fuel oil resistance, lubricating oil resistance, strong oxidant resistance, chemical resistance and good electrical insulation performance. Widely used in defense industry and civilian industry. However, the existing rubber gaskets have defects such as unsatisfactory sealing effect, poor wear resistance and low strength, which are far from meeting the actual requirements. Therefore researching and developing a kind of high-performance rubber gasket has become the task of top priority. Contents of the invention

[0003] The object of the present inventi...

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