Patent 7186767 was granted and assigned to Bayer on March, 2007 by the United States Patent and Trademark Office.
A thermoplastic molding compositions having improved stress cracking resistance is disclosed. The composition containsA) 40 to 99.5 parts by weight of at least one branched resin selected from a first group consisting of aromatic polycarbonate and polyestercarbonate andB) 0.5 to 60 parts by weight of graft polymer containing a grafting shell and a grafting base, said grafting base being other than polybutadiene rubber.