Can end sealing rubber compound

Details Can end sealing rubber compound Can end sealing rubber compound

C - Chemistry, Metallurgy

08

L

400/1340, 400/18

C08L 9/08 (2006.01) C08L 9/06 (2006.01) C09K 3/10 (2006.01)

Patent

CA 1115878

ABSTRACT OF THE DISCLOSURE The invention is a can end sealing rubber composition (a) consist- ing essentially of a styrene-butadiene rubbery copolymer, a tackifier and a filler, and (b) having (1) a creep resistance coefficient K defined by the following equation of at least 0.1 but not exceeding 0.6, K = log J?(10) - log J?(11)wherein J?(10) is the creep compliance measured 10 minutes after exerting a load when a fabricated article of the composition as a specimen is compressed in water at 90°C. by a parallel plate plastometer, and (2) a creep compliance J?(1) of at least 3 x 10-9 cm2/dyne not exceeding 1 x 10-6 cm2/dyne, the creep compliance being measured 1 minute after exerting a load when the specimen is compressed in water at 25°C. by a parallel plate plastometer. The composition displays superior hot water resistance and displays a very good can sealing performance.

293140

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