Shell-core type rubber powders

Details Shell-core type rubber powders Shell-core type rubber powders

C - Chemistry, Metallurgy

08

F

400/2024, 117/47

C08F 279/02 (2006.01) C08F 291/02 (2006.01)

Patent

CA 1208833

RUBBER POWDERS Abstract of the Disclosure Free-flowing rubber powders containing particles of a diene, acrylate or EPDM rubber having an average diameter of from 0.01 to 10 mm which contain, polymerized thereon, a shell of the polymer or copolymer of one or more vinyl monomers in a quantity of from 2 to 20 % by weight, based on the rubber, and a process for their production, wherein a latex of a diene, acrylate or an EPDM rubber having a glass transition temperature of below 0°C is completely broken with the formation of an aqueous suspen- sion of the rubber, from 2 to 20 % by weight, based on the rubber, of one or more vinyl monomers which form polymers having glass transition temperatures of above 25°C are then introduced into the suspension and the monomer(s) is/are polymerized, optionally after adding radical-forming catalysts.

393883

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