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US 2004/0110900 A1Published application
Method of toughening thermoplastic polymers and thermoplastic compositions produced thereby
OwnerWillie Lau, Paul Ralph Van Rheeneninventors
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Abstract
A method of forming a toughened article from a blend of a thermoplastic polymer and a comb copolymer is disclosed, along with the toughened article produced thereby. Compositions such as solids blends and melt blends, including a thermoplastic polymer and a comb copolymer, are also disclosed.
Claims20
A method of forming a toughened article comprising the steps of:
- (a) forming a solids blend comprising a thermoplastic polymer and a comb copolymer;
- (b) heating and mixing said solids blend to form a melt blend;
- and
- (c) shaping said melt blend to form an article;
- wherein said comb copolymer comprises:
- a backbone;
- and
- as polymerized units, at least one macromonomer comprising a graft segment;
- and
- wherein said macromonomer is a macromonomer produced by aqueous emulsion polymerization.
7 more elements
A method of forming a toughened article wherein said method comprises the steps of:
- (A) forming a macromonomer aqueous emulsion comprising a plurality of water-insoluble particles of macromonomer, wherein:
- (i) said macromonomer comprises polymerized units of at least one first ethylenically unsaturated monomer;
- (ii) said macromonomer is produced by aqueous emulsion polymerization;
- and
- (iii) said macromonomer further has:
- (a) a degree of polymerization of from 10 to 1000;
- and
- (b) at least one terminal ethylenically unsaturated group;
- (B) forming a monomer composition comprising at least one second ethylenically unsaturated monomer;
- (C) combining at least a portion of said macromonomer aqueous emulsion and at least a portion of said monomer composition to form a polymerization reaction mixture;
- (D) polymerizing said macromonomer with said second ethylenically unsaturated monomer in the presence of an initiator to produce said plurality of comb copolymer particles;
- (E) isolating said comb copolymer particles to form a solid comb copolymer;
- (F) forming a solids blend comprising a thermoplastic polymer and said solid comb copolymer;
- (G) heating and mixing said solids blend to form a melt blend;
- and
- (H) shaping said melt blend to form said article.
13 more elements
Dependencies are inferred from the claim text.