Imperial Chemical Industries Limited

Carl F Mathews

John B Rose

Eric Nield

Brian N Hendy

Gordon E Pears

Peter I Vincent

Peter G Knowles

Christopher Deverell

A graft copolymer comprises a substrate of a diene rubber, and a homogeneous superstrate containing units of acrylonitrile and at least one aromatic olefin having a molar ratio of acrylonitrile to olefin between 2 and 9. The superstrate may also contain a minor amount (preferably less than 10 mole %) of at least one other comonomer selected from acenaphthylene, vinyl carbazole and its derivatives, maleimide and its N-substituted derivatives and norbornene and its derivatives.

Graft copolymers containing rubber, acrylonitrile and an aromatic olefin

Opaque voided films having a total luminous transmission not exceeding 25% are made from blends of a polyester preferably polyethylene terephthalate, with 3 to 27% of an ethylene or propylene polymer, prepared by dry blending. One end use of the film, as a base for photographic prints is also described.

Voided films of polyester with polyolefin particles

Blends of acrylonitrile copolymers with graft copolymers containing

Opaque molecularly oriented and heat set linear polyester film and

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Ware, United Kingdom

Carl F Mathews