Synthesis of a high-molecular-weight polysiloxane containing both nitrile and vinyl groups and a method for preparing addition-type thermally vulcanized nitrile silicone rubber

Abstract

The invention relates to a synthesis method of high molecular weight polysiloxane containing nitrile group and vinyl at the same time and a preparation method of addition type heat vulcanized nitrile silicone rubber. The high molecular weight polysiloxane containing nitrile group and vinyl at the same time is prepared by performing amino group and double bond addition reaction on polysiloxane containing amino group and vinyl at the same time and compound containing unsaturated bonds and nitrile group. The addition type heat vulcanized nitrile silicone rubber is prepared through the synthesized high molecular weight polysiloxane containing nitrile group and vinyl at the same time. The synthesis method is simple and controllable, and high in synthesis efficiency; as the synthesized polysiloxane containing nitrile group and vinyl at the same time contains nitrile groups, the polarity and solubility parameters of polysiloxane are changed, and the prepared addition type heat vulcanized nitrile silicone rubber can have the performance of solvent oil resistance, and can be applied to various oil resistance and low temperature resistance places.

Description

technical field [0001] The invention relates to the synthesis of high-molecular-weight polysiloxane containing both nitrile groups and vinyl groups and the preparation method of addition-type thermally vulcanized nitrile silicone rubber, which belongs 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 mo...

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.

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