Synthesis of nitrile-containing siloxane and preparation method of room temperature condensation type nitrile silicone rubber

Abstract

The invention relates to synthesis of nitrile-containing siloxane and a preparation method of room temperature condensation type nitrile silicone rubber. The nitrile-containing siloxane is obtained by amino-containing siloxane and a nitrile-containing compound containing an unsaturated bond through an addition reaction of amino and double bond, and further the synthetized nitrile-containing siloxane is used to prepare the room temperature condensation type nitrile silicone rubber. A synthesis method is simple and controllable, the synthesis efficiency is high, and the synthetized nitrile-containing siloxane contains nitrile groups and thus changes the polarity and a solubility parameter of siloxane; the room temperature condensation type nitrile silicone rubber prepared by using the nitrile-containing siloxane has the property of resisting solvent oil, and can be widely applied to various oil-resisting and low temperature-resisting places.

Description

technical field [0001] The invention relates to the synthesis of nitrile group-containing siloxane and the preparation method of room temperature condensation type 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 molded rubber products for special occasions. etc....

AI Technical Summary

Problems solved by technology

The polymerization process reacts violently and has poor controllability

Moreover, the prepared nitrile silicone rubber has serious disadvantages in processing and performance, mainly because it absorbs moisture during mixing, and increases with the increase of the nitrile unit content, and the mixed rubber after absorbing water is difficult to vulcanize. Problems such as long vulcanization time and insufficient heat resistance limit 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