Silicone rubber thermoplastic elastomer with good component compatibility and preparation method thereof

• Main Authors: TAN ZHENGXIN, PAN HEBIN
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention relates to a silicone rubber thermoplastic elastomer with good component compatibility and a preparation method thereof, and belongs to the field of organic macromolecules, the elastomer comprises the following components by weight: 118-123 parts of polyurethane, 79-81 parts of silicone rubber, 19-21 parts of white carbon black, 2-3 parts of a compatibilizer, and 2-3 parts of a vulcanizing agent DBPH. Wherein the compatibilizer is sorbitan monostearate, and the compatibilizer is prepared by reaction of edible industrial stearic acid and sorbic anhydride. The preparation method comprises the following steps: mixing the polyurethane, the silicone rubber, the white carbon black and the compatibilizer, blending for a period of time, then adding the vulcanizing agent in a corresponding proportion, carrying out dynamic vulcanization, and extruding by using a twin-screw extruder. By optimizing the design of the components and combining with the improvement of the process, the compatibility of all the c