Silicone-containing thermoplastic polymers for medical uses

Details Silicone-containing thermoplastic polymers for medical uses Silicone-containing thermoplastic polymers for medical uses

C - Chemistry, Metallurgy

08

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400/3007, 167/33

C08L 53/02 (2006.01) A61L 29/04 (2006.01) A61L 29/18 (2006.01) A61M 25/00 (2006.01) A61M 25/01 (2006.01) C08L 23/04 (2006.01) C08L 23/08 (2006.01)

Patent

CA 1134088

ABSTRACT OF THE DISCLOSURE A flexible composition which is preferably radio- paque comprises a plastic material which may be mixed with from 10 to 50 percent by weight of a radiopaque filler. The plastic material comprises the product of (a) block copolymer having thermoplastic, rubbery characteristics, having a central rubbery olefin block and terminal blocks of a polystyrene; (b) low crystallinity ethylene polymers such as poly (ethylene-vinyl acetate); and (c) a silicone gum containing a small amount of a silicon-bonded olefin group such as vinyl. Optionally, the addition of 5 to 40 percent by weight polypropylene may be included in these materials to improve their heat resistance and strength without affecting their transparency, when transparent materials are formulated.

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