THERMOSTABLE COMPOSITE BASED ON SILOXANE BLOCK-COPOLYMER Russian patent published in 2003 - IPC

FIELD: polymers, organosilicon compounds. SUBSTANCE: invention describes thermostable composite based on siloxane block-copolymer comprising mineral filling agent, antistructurizing addition and vulcanizing agent that comprises block-copolymer consisting of inflexible phenylsesquioxane block of the following structure: where m = 2-3 and flexible block dimethylphenylsiloxane oligomer of the following structure: where n = 20-30; a, b = from 0 to 30 mole% in the mole ratio of flexible and rigid blocks = 1-2 and diphenylguanidine is used as vulcanizing agent and components are taken in the following ratio, weight p. p.: siloxane block-copolymer, 100.0; mineral filling agent, 27-32; antistructurizing addition, 8-10; vulcanizing agent, 1.5-2.0. Invention provides enhancement of thermal stability of composite up to 450-500 C and development thicken materials on their base working in the range of temperature from 60 to 500 C. EFFECT: valuable properties of composite. 2 cl, 2 tbl