Synthesis of siloxane containing nitrile group and vinyl group and preparation method of room temperature addition type nitrile silicone rubber

Abstract

The invention relates to synthesis of siloxane containing nitrile group and vinyl group at same time and a preparation method of room-temperature addition type nitrile silicone rubber. The siloxane containing the nitrile group and the vinyl group is prepared from the siloxane containing amino group and the vinyl group at the same time, and a vinyl-group-containing compound with unsaturated bonds through an addition reaction of the amino group and the double bonds; the synthesized siloxane containing the nitrile group and the vinyl group at same time is used for preparing the room-temperature addition type nitrile silicone rubber. The synthesis method is simple and controllable, and high in synthesis efficiency. The synthesized siloxane containing the nitrile group and the vinyl group at same time contains the vinyl group so that the polarity and the dissolvability parameters of the siloxane are improved; the room-temperature addition type nitrile silicone rubber prepared from the siloxane containing the nitrile group has a property of resisting solvent oil and can be widely applied to various oil-resisting and low-temperature-resisting fields.

Description

technical field [0001] The invention relates to a method for synthesizing siloxane containing both nitrile groups and vinyl groups and a room-temperature addition-type 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. etc....

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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