A compatible blend of polycarbonate resin with a vinyl (co)polymer blending partner
is disclosed. The preparation of inventive blend comprise reactive blending of
polycarbonate, a vinyl (co)polymer and a novel compatibilizer in the presence of
a transesterification catalyst and under conditions of time and temperature designed
to promote transesterification. The compatibilizer is the polymerized reaction
product of at least one vinyl monomer that contains no hydroxy groups and a hydroxyl
containing monomer conforming to (I)
##STR1##
where R denotes H or C1-C4 alkyl, R1 denotes
H, Cl, Br, C1-C4 alkyl, cyclohexyl, or C1-C4
alkoxy, a is 0 or 1, b is 0 or 1, c is 0 or 1, n is an integer of 0 to 4
and X is an OH group. The compatible blends of the invention are characterized
by their improved properties.
