Patent ID: 6723775
Filing Date: 2004-04-20
Classification: B32B,C08F,C08L,C09D,C09J,Y10T

Abstract:
A method of making a graft copolymer comprising:(a) forming a macromonomer aqueous emulsion comprising one or more water-insoluble particles of macromonomer, wherein the macromonomer is a macromonomer prepared by aqueous based polymerization, and wherein the macromonomer comprises polymerized units of a first ethylenically unsaturated monomer, the macromonomer further having (i) a degree of polymerization of from 10 to 1000, (ii) at least one terminal ethylenically unsaturated group, (iii) less than 5 weight percent polymerized acid-containing monomer, and (iv) no polymerized mercapto-olefin compounds; (b) forming a monomer composition comprising at least one second ethylenically unsaturated monomer; and (c) combining at least a portion of the macromonomer aqueous emulsion and at least a portion of the monomer composition to form a polymerization reaction mixture and polymerizing the macromonomer with the second ethylenically unsaturated monomer in the presence of an initiator to produce a copolymer composition comprising graft copolymer particles.