Addition-type heat-resistant silicon rubber and preparation method thereof

Abstract

The invention discloses addition-type heat-resistant silicon rubber and a preparation method thereof. The heat-resistant silicon rubber comprises a component A and a component B, wherein the component A is prepared from the following ingredients in parts by weight: 100 parts of methyl phenyl vinyl silicone oil, 2-4 parts of catalyst, 4-12 parts of heat-resistant additive processed by a silane coupling agent, and 400-500 parts of auxiliary packing processed by the silane coupling agent; the component B is prepared from the following ingredients in parts by weight: 100 parts of methyl phenyl vinyl silicone oil, 1.8-2.5 parts of cross-linkingagent, 0.1-0.15 parts of inhibitor, 4-12 parts of heat-resistant additive processed by the silane coupling agent, and 400-500 parts of auxiliary packing processed by the silane coupling agent; and the components A and B are evenly mixed according to the equal mass ratio, defoamed in vacuum and cured to prepare the addition-type heat-resistant silicon rubber. The heat-resisting temperature of the addition-type heat-resistant silicon rubber disclosed by the invention can achieve 460 DEG C; and the heat-resisting requirements of the fields such as aeronautics and astronautics, ignition cable protecting bushes of automobiles, and high-temperature sealing elements on the silicon rubber can be met.

Description

technical field

[0001] The invention relates to the field of engineering materials, in particular to the technical field of heat-resistant silicone rubber, in particular to an addition-type heat-resistant silicone rubber and a preparation method thereof. Background technique

[0002] Silicone rubber is a special rubber with excellent performance. It has excellent heat resistance, insulation, cold resistance and dielectric properties, so it is widely used. Ordinary silicone rubber has a heat resistance between 200 and 300°C. With the development of science and technology, under certain conditions, higher requirements are placed on the heat resistance of silicone rubber, especially with the development of aerospace technology, further improving the heat resistance of silicone rubber has great significance.

[0003] Chinese patent CN102276990A discloses a method for preparing heat-resistant and acid-resistant silicone rubber. The heat-resistant temperature of silicone rubber ...