Synthesis of high molecular weight nitrile-group-containing polysiloxane and preparation method of peroxide type hot vulcanization nitrile silicone rubber

Abstract

The invention relates to synthesis of high molecular weight nitrile-group-containing polysiloxane and a preparation method of peroxide type hot vulcanization nitrile silicone rubber. The high molecular weight nitrile-group-containing polysiloxane is prepared by carrying out addition reaction between an amino group and a double bond on polysiloxane containing the amino group and a compound containing an unsaturated bond and a nitrile group. The synthesized high molecular weight nitrile-group-containing polysiloxane (also contains vinyl) is adopted for being compounded with a crosslinking agent, a catalyst used for crosslinking, filler and other auxiliaries, so that the peroxide type hot vulcanization nitrile silicone rubber is prepared. The synthesis of the high molecular weight nitrile-group-containing polysiloxane is simple in synthesis method and controllable, and synthesis efficiency is high; and the peroxide type hot vulcanization nitrile silicone rubber prepared by adopting siloxane containing a nitrile group can have solvent resistance and oil resistance and can be widely applied to various oil resistant and low temperature resistant places.

Description

technical field [0001] The invention relates to a method for synthesizing high-molecular-weight nitrile-group-containing polysiloxane and a peroxide-type thermally vulcanized nitrile silicone rubber, belonging to the field of organosilicon polymer synthesis. Background technique [0002] Silicone polymer materials have many superior properties, such as high and low temperature resistance, weather resistance, aging resistance, electrical insulation, etc., and are widely used in aerospace, electronics, light industry, textiles, machinery, construction, agriculture, and transportation. It is closely related to people's daily life and has become an important polymer material in the national economy. Silicone rubber is an important organosilicon polymer material, and its application products mainly include molded products (such as various rubber sheets, gaskets, gaskets, films, rubber rollers, keys of electronic appliances, and various molded rubber products for special occasions...

AI Technical Summary

Problems solved by technology

The polymerization process reacts violently and has poor controllability

Moreover, nitrile silicone rubber has serious shortcomings in processing and performance, mainly because it absorbs moisture during mixing, and increases with the increase of nitrile unit content, the mixed rubber after water absorption is difficult to vulcanize, and the vulcanization time is long and insufficient heat resistance, thus limiting its application and development

Nitrile silicone rubber has excellent performance in cold resistance, oil resistance, solvent resistance, corrosion resistance, etc., and has broad application prospects, but there are very few reports on the preparation of nitrile silicone rubber recently.

Images