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US 5,204,412 AGranted
Photodegradable polymer composition
AssigneeBP Chemicals Limited
InventorsNeil S. Davidson, Geoffrey Harrison, Kenneth Wilkinson
Life of this patent
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AssigneeBP Chemicals Limited
InventorsNeil S. Davidson, Geoffrey Harrison, Kenneth Wilkinson
Estimating the term…
A photodegradable polymer composition comprising 50 to 99 weight percent based on the total weight of photodegradable polymer composition of a thermoplastic addition polymer and 1 to 50 weight percent based on the total weight of the photodegradable polymer composition of a photodegrading agent, said photodegrading agent being a polyketone which is a linear copolymer consisting of units of --CO(C.sub.2 H.sub.4)-- and units --CO(B')-- where B' is derived from olefinically unsaturated hydrocarbon selected from the group consisting of CHR.sub.4 .dbd.CHR.sub.5 (I) and CH.sub.2 .dbd.C(R.sub.6)(CHR.sub.7 R.sub.8) (II), wherein R.sub.4 is a hydrocarbyl group, R.sub.5 is hydrogen or a hydrocarbyl group, R.sub.6 is a hydrocarbyl group, and R.sub.7 and R.sub.8 are individually hydrogen or hydrocarbyl groups.
A photodegradable polymer composition comprising 50 to 99 weight percent based on the total weight of photodegradable polymer composition of a thermoplastic addition polymer and 1 to 50 weight percent based on the total weight of the photodegradable polymer composition of a photodegrading agent, said photodegrading agent being a polyketone which is a linear copolymer consisting of units of --CO(C.sub.2 H.sub.4)-- and units --CO(B')-- where B' is derived from olefinically unsaturated hydrocarbon selected from the group consisting of CHR.sub.4 .dbd.CHR.sub.5 (I) and CH.sub.2 .dbd.C(R.sub.6)(CHR.sub.7 R.sub.8) (II), wherein R.sub.4 is a hydrocarbyl group, R.sub.5 is hydrogen or a hydrocarbyl group, R.sub.6 is a hydrocarbyl group, and R.sub.7 and R.sub.8 are individually hydrogen or hydrocarbyl groups.
A method for enhancing the photodegradability of a thermoplastic addition polymer, said method comprising the step of blending with the thermoplastic addition polymer 1 to 50 weight percent of the photodegrading agent, said photodegrading agent being a polyketone which is a linear copolymer consisting of units of --CO(C.sub.2 H.sub.4)-- and units --CO(B')-- where B' is derived from olefinically unsaturated hydrocarbon selected from the group consisting of CHR.sub.4 .dbd.CHR.sub.5 and CH.sub.2 .dbd.C(R.sub.6)(CHR.sub.7 R.sub.8), wherein R.sub.4 is a hydrocarbyl group, R.sub.5 is hydrogen or a hydrocarbyl group, R.sub.6 is a hydrocarbyl group, and R.sub.7 and R.sub.8 are individually hydrogen or hydrocarbyl groups.
Dependencies are inferred from the claim text.