Bayer Corporation

Bayer Aktiengesellschaft

Bayer Materialscience, LLC

Daniel H Bolton

David M Derikart

Sivaram Krishnan

Pierre Moulinie

Nicanor Kohncke

Wolfgang Ebert

James B Johnson

Ramesh M Pisipati

Jon M Newcome

Jeffrey M Tennant

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)where R denotes H or C&#x2013;Calkyl, Rdenotes H, Cl, Br, C&#x2013;Calkyl, cyclohexyl, or C&#x2013;Calkoxy, 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.

Compatible blend of polycarbonate with vinyl (co)polymer

A thermoplastic polycarbonate molding composition having improved resistance to gamma radiation-induced yellowing is disclosed. Particularly suitable for the manufacture of devices geared for medical applications, the composition contains an additive amount of a stabilizing compound conforming structurally to

Polycarbonate composition resistant to gamma radiation

A transparent thermoplastic molding composition having good release properties is disclosed. The composition which contains no magnetic elements contains a polycarbonate resin and 0.01 to 0.3 percent by weight of a mold release agent. The agent is the product of a reaction of a compound represented by formula (I) ##STR1## where R.sub.1 denotes a C.sub.1-30 -alkyl group, with at least one member selected from the group consisting of ##STR2## where R.sub.2 and R.sub.3 independently denote C.sub.1-30 - alkyl or an aryl group, and ##STR3## where n is 1-7.

Polycarbonate compositions having reduced tendency to splay

Growing community of inventors

Aliquippa, PA, United States of America

Daniel H Bolton