초록 ▼

A polymer blend containing a polycarbonate and a siloxane-polyetherimide copolymer. The blends of the invention have improved impact strength, particularly thick section impact strength, over the unmodified polycarbonates. In addition the blends have good physical properties, relatively low flammabi

A polymer blend containing a polycarbonate and a siloxane-polyetherimide copolymer. The blends of the invention have improved impact strength, particularly thick section impact strength, over the unmodified polycarbonates. In addition the blends have good physical properties, relatively low flammability and are resistant to environmental stress cracking and crazing.

대표청구항 ▼

A polymer blend which consists essentially of from 1% to about 99% by weight of a polycarbonate containing repeating units of the formula [Figure] wherein Y is a divalent aromatic residue of a dihydric phenol and from about 99% to about 1% by weight of a siloxane-polyetherimide copolymer which consi

A polymer blend which consists essentially of from 1% to about 99% by weight of a polycarbonate containing repeating units of the formula [Figure] wherein Y is a divalent aromatic residue of a dihydric phenol and from about 99% to about 1% by weight of a siloxane-polyetherimide copolymer which consists essentially of repeating units of the formula [Figure] and repeating units of the formula [Figure] [Figure] wherein T is －O－or a group of the formula －O－Z－O－ wherein the divalent bonds of the －O－or the －O－Z－O－group are in the 3,3′, 3,4′, 4,3′or 4,4′positions; Z is a member selected from the group consisting of (A) [Figure] [Figure] [Figure] [Figure] and (B) divalent organic radicals of the general formula [Figure] where X is a member selected from the group consisting of divalent radicals of the formulas [Figure] where y is an integer from 1 to about 5; and R is a divalent organic radical selected from the group consisting of (a) aromatic hydrocarbon radicals having from 6 to about 20 carbon atoms and halogenated derivatives thereof, (b) alkylene radicals having from 2 to about 20 carbon atoms, cycloalkylene radicals having from 3 to about 20 carbon atoms, and (c) divalent radicals of the general formula [Figure] where Q is a member selected from the group consisting of [Figure] x is an integer from 1 to about 5, n and m independently are integers from 1 to about 10 and g is an integer from about 5 to about 25.