Thermoplastic polymer adducts which contain residues of...

C - Chemistry – Metallurgy – 08 – F

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400/2004

C08F 291/00 (2006.01) C08F 255/02 (2006.01) C08F 283/00 (2006.01) C08F 283/02 (2006.01) C08F 283/04 (2006.01)

Patent

CA 1339161

A modified polymer is described comprising a thermoplastic polymer composition comprising a graft copolymer between (1) a preformed thermoplastic polymer and (2) a monomer composition comprising (a) at least one polymerizable monomer containing a polymerizable group and at least one functional polymer-modifying group and (b) at least one comonomer containing at least two polymerizable groups, said copolymer being substantially free of unbound monomer. Such polymers can be produced by reacting together, in a melt and in the presence of free radicals whilst applying shear to the melt, the preformed thermoplastic polymer to be modified, the polymerizable monomer, and the comonomer, thereby to graft said monomer to said preformed polymer leaving substantially no unbound monomer, the reaction being continued for a period of time sufficient to produce a graft copolymer that is thermoplastic and can be blended with an unmodified polymer. A free radical generator can be added, if desired.

607790

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