Grafted copolymers

Abstract

Grafted copolymers are disclosed which contain an acrylic acid ester polymer, vinyl chloride and a copolymer containing units of ethylene, carbon monoxide and n-butyl acrylate; and their use in preparing self-supporting films (sheets) and moulded articles.

I claim: 
     
       1. A thermoplastic copolymer comprising (a) an acrylic acid ester polymer;   (b) vinyl chloride; and   (c) a copolymer consisting essentially of, by weight, (i) 40-40% ethylene;   (ii) 3-30% carbon monoxide; and   (iii) 5-60% of n-butyl acrylate.     
     
     
       2. A blend according to claim 1 wherein (a) is polybutyl acrylate. 
     
     
       3. A blend according to claim 1 comprising, by weight, 20-60% (a), 30-70% (b) and 1-30% (c). 
     
     
       4. A thermoplastic composition comprising a blend according to claim 1 and an additional thermoplastic material. 
     
     
       5. A self-supporting film made from a blend or composition according to any one of claims 1 to 4. 
     
     
       6. A molded article made from a blend or composition according to any one of claims 1 to 4.