Cycloolefin polymer molding composition of improved...

Details Cycloolefin polymer molding composition of improved... Cycloolefin polymer molding composition of improved...

C - Chemistry, Metallurgy

08

L

C08L 65/00 (2006.01) C08K 5/5377 (2006.01) C08K 5/5393 (2006.01) C08L 45/00 (2006.01)

Patent

CA 2110100

Abstract Cycloolefin polymer molding composition of improved stability to chemical degradation. A cycloolefin polymer molding composition which comprises organophosphorus compounds of the formula IX R13-[P(OR14)2]u (IX) of the formula X Image (X) or of the formula XI Image (XI) if appropriate in addition to other additives, shows an improved stability to chemical degradation. The organophosphorus compounds used according to the invention maintain the melt viscosity of the molding composition at the highest level (very small deviation from the starting value). They furthermore lead to the best initial colors of test specimens and to a relatively low change in color after kneading experiments.

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