Preparation method of room-temperature condensation type nitrile silicone rubber

Abstract

The invention relates to a preparation method of room-temperature condensation type nitrile silicone rubber. The room-temperature condensation type nitrile silicone rubber is prepared by utilizing synthesized cyano-containing siloxane; the cyano-containing siloxane is prepared from the cyano-containing siloxane and a cyano-containing compound containing an unsaturated bond through addition reaction of amino and double bonds. The synthesis method provided by the invention is simple and controllable and is high in synthesis efficiency; the synthesized cyano-containing siloxane contains a cyano group so that the polarity and solubility parameters of the siloxane are changed. The room-temperature condensation type nitrile silicone rubber prepared by utilizing the synthesized cyano-containing siloxane can have the performance of resisting solvent soil and can be widely applied to various oil-resisting and low-temperature-resisting fields.

Description

[0001] This application is a divisional application with application number 201610173484.9 and application date: 2016-03-24 technical field [0002] 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 [0003] 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, ...

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.

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