Bayer Corporation

Mobay Corporation

Other

Bayer Materialscience, LLC

Winfried G Paul

Sivaram Krishnan

James Y J Chung

Kevin F Dunay

Klaus Horn

Charles E Lundy

Michael Erkelenz

Ronald L Price

Roger J White

Larry D Sarver

Melanie Moethrath

A flame-retardant thermoplastic molding composition is disclosed. The composition contains aromatic polycarbonate resin and sufficient amounts of poly(tetrafluoroethylene) and sulfo-modified polyester, that are effective to impart to the composition flame resistance that in accordance with UL-94 standard is rated V-0 at 1/16&#x2033; thick specimens.

Flame retardant, thermoplastic polycarbonate molding compositions

Thermoplastic polycarbonate compositions having high toughness

The present invention resides in the surprising properties found to characterize the thermoplastic molding composition which comprise a polydiorganosiloxane block copolycarbonate and an additive amount of a partially fluorinated polyolefin. The composition of the invention has a surprisingly improved flame retardance and a high impact strength.

Flame retardant polycarbonate blends

A thermoplastic polycarbonate molding composition free from organo phosphorus compounds and having an improved resistance to discoloration caused by exposure to High Intensity Discharge (HID) light and heat is disclosed. Accordingly, the molding composition contains (co)polycarbonate resin, a dimeric benzotriazole and an ester of a 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid. In a preferred embodiment, a sheet made of (co)polycarbonate resin is rendered improved resistance to discoloration by having applied to at least one of its surfaces an adherent protective film prepared from the polycarbonate composition of the invention.

Color-stable polycarbonate composition and articles molded therefrom

A thermoplastic molding composition comprising polycarbonate resin and additive, positive, amounts of stabilizer and salt is disclosed. The composition is characterized by its freedom from splay and by its improved flame retardance. The stabilizer of the invention is a physical mixture of poly(alkyl methacrylate) with fluorinated polyolefin, and the salt is an alkali metal or alkaline earth metal salt of perfluoroalkane sulfonic acid, aromatic sulfimide, or aromatic sulfonic acid.

Flame retardant polycarbonate composition

The present invention is related to a stain resistant polycarbonate panel which preferably comprises co-extruded polycarbonate sheet and an adherent layer based on linear polycarbonate resin which contains an additive conforming to ##STR1## wherein R.sup.1 and R.sup.2 independent of each other are a hydrogen or a halogen atom, a C.sub.1 -C.sub.12 alkoxy, C.sub.7 -C.sub.18 arylalkoxy or a C.sub.1 -C.sub.10 alkyl, cycloalkyl, arylalkyl or an aryl radical and R.sup.3 and R.sup.4 independent of each other are a hydrogen atom, a C.sub.1 -C.sub.10 alkyl, cycloalkyl, arylalkyl or an aryl radical, n is an integer of 0-4 and m is an integer of 1 to 3, --Bridge-- is either ##STR2## where p is 0-3, q is 1-10, Y denotes any of ##STR3## and R.sup.3 and R.sup.4 independently denote a hydrogen atom a C.sub.1 -C.sub.10 alkyl, cycloalkyl, arylalkyl or an aryl radical characterized in that said adherent layer is about 5 to 100 microns in thickness and in that only one of its surfaces is bonded.

Stain resistant polycarbonate panels

It has now been found that the flame retardance of polydiorganosiloxane copolycarbonates may be significantly improved upon the addition thereto of a small amount of a metal salt of an inorganic acid. The polydiorganosiloxane copolycarbonates are conforming structurally to ##STR1## wherein p is an integer of from 1 to about 10,

Thermoplastic polycarbonates and blends with enhanced flame retardant

The invention relates to thermoplastic polycarbonate molding compositions which are rendered resistant to gamma-radiation by incorporating therewith about 0.05 to about 10 percent by weight of a stabilizing agent selected from the group consisting of ##STR1## wherein R is a hydrogen or a halogen atom or a C.sub.1 -C.sub.10 alkyl, a C.sub.6 -C.sub.10 aryl, C.sub.1 -C.sub.22 acyl, C.sub.6 -C.sub.18 alkylaryl or a C.sub.4 -C.sub.10 cycloalkyl radical, m is 1 or 3 to 6, n is an integer of about 20 to 70 and Y is a radical conforming to ##STR2## wherein R, R' and R' independently one of the others are selected from C.sub.1 -C.sub.10 alkyl and C.sub.6 -C.sub.12 aryl radicals preferably C.sub.1 -C.sub.4 alkyl radical.

Growing community of inventors

Pittsburgh, PA, United States of America

Winfried G Paul