| abstract |
A process and composition for MBS modifiers having (A) a rubbery core,n(B) an inner graft stage comprised mainly of a hard polymer, (C) an intermediatensealer stage comprised mainly of an alkyl acrylate monomer and/or anpolyunsaturated crosslinker, and (D) an outer shell to provide compatibility ofnthe core-shell polymer with the matrix polymer, is disclosed. A process fornpreparing MBS impact modifiers having suprisingly improved impactnperformance in matrix polymers is also disclosed. Articles prepared from blendsnof matrix polymers and the MBS core-shell polymers described herein are alsondisclosed. |