Patent ID: 7989548

Claim:
A process for making a polymer blend suitable for blow moulding, comprising compounding in a melt extruder at a temperature sufficient to melt and mix all components: thermoplastic vulcanisate (X) component comprising: (X1) from 15 to 60 weight percent of polyalkylene terephthalate polyester polymer or copolymer continuous phase, and (X2) from 40 to 85 weight percent of rubber disperse phase comprising poly(meth)acrylate or a polymer comprised of ethylene and methyl acrylate, said rubber being dynamically cross-linked with an organic peroxide free radical initiator and an organic diene co-agent; together with thermoplastic polyester component (Y) comprising: (Y1) from about 5 to about 25 weight percent of a copolyether —ester block copolymer elastomer; (Y2) from about 40 to about 65 weight percent of poly(butylene terephthalate) (Y3) from about 5 to about 20 weight percent of an ionomer, said ionomer comprising copolymers of ethylene and methacrylic acid, the ionomer having acid moieties from about 10 to 100 mol percent neutralized; and (Y4) from about 5 to about 30 weight percent of terpolymer of ethylene, butylacrylate and glycidylmethacrylate; the total of (Y1), (Y2), (Y3) and (Y4) being 100% by weight; the total of (Y1) and (Y2) not exceeding 70% by weight.