Abstract: A melt-stable, pigmented thermoplastic molding composition is disclosed. Accordingly, to the composition which contains polycarbonate resin and pigment there is imparted an improved level of melt stability upon the incorporation therewith of an additive amount of a melt stabilizer conforming to ##STR1## where R.sub.1, R.sub.2, R.sub.3 and n are defined. In an additional embodiment the invention relates to a color concentrate containing polycarbonate resin, up to 30% of a pigment and an effective amount of said stabilizer.

Abstract: A molding composition containing a blend of polycarbonate resin and a small amount of an aromatic dicyanate ester is disclosed. In comparison to the performance of the unmodified polycarbonate resin, the transparent composition of the invention exhibits a significantly reduced dripping rate upon burning. The composition is suitable for the preparation of thermoplastically molded articles.

Abstract: A pigmented thermoplastic molding composition is disclosed comprising(i) about 90 to 98 percent of an aromatic polycarbonate,(ii) about 1 to 9 percent of ABS, and(iii) about 1 to 9 percent of a grafted olefinic copolymer which is a graft polymer of one or more unsaturated dicarboxylic acid or the anhydride of said acid on an olefinic copolymer backbone.The composition is noted to have good mechanical properties and the articles molded therefrom have good cosmetics.

Abstract: The invention relates to thermoplastic polycarbonate molding compositions which are rendered resistant to gamma-radiation by incorporating therewith about 0.1 to about 5 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 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, n is an integer of at least 1 and preferably 1 to about 100 and Y and Y.sup.1 independently are a hydrogen atom, a C.sub.6 -C.sub.10 aryl, C.sub.1 -C.sub.10 alkyl or a C.sub.6 -C.sub.18 alkylaryl or a C.sub.6 -C.sub.18 arylalkyl radical or ##STR2## wherein m is 1 or 3-6, R.sub.1, R.sub.2 and R.sub.3 independently are a hydrogen atom or a C.sub.1 -C.sub.10 alkyl, C.sub.6 -C.sub.10 aryl or a C.sub.6 -C.sub.18 alkylaryl radical.

Abstract: A thermplastic molding composition is disclosed which contains a homogeneous blend of a polycarbonate resin, an olefin-acrylate rubber terpolymer impact modifier and a flame retardant package which contains a fluorinated polyolefin, a halogenated phthalimide and an oligomeric carbonate. The composition was found to be suitable for preparing molded articles having an excellent level of flame resistance and impact properties.

Abstract: A thermoplastic molding composition is disclosed which contains a homogeneous blend of a polycarbonate resin, a graft-modified olefin rubber and, a particular flame retardant package containing a salt, halogenated phthalimine, polytetrafluoroethylene and an oligomeric carbonate. The composition was found to be suitable for preparing molded articles having an excellent level of flame resistance and impact properties.

Abstract: A thermoplastic molding composition containing an aromatic polycarbonate resin, a flame retarding package and an impact modifier is disclosed. The impact modifier is a maleic anhydride-functionalized block copolymer which consist of polystyrene endblock and poly(ethylene/butylene) midblocks. Characterized in its improved impact performance and flame retardance, the composition is suitable for the manufacture of molded articles of improved properties.

Abstract: A molding composition comprising a polycarbonate resin and plating modifier was found to be suitable for preparing metal coated articles where the metal coating is deposited by an electroless process. The plating modifier in accordance with the invention is at least one member selected from the group consisting of a polyanhydride, and a monovinyl aromatic-acrylonitrile copolymer. An advantageous embodiment of the invention includes incorporating in the molding composition a flame retarding amount of a conventional flame retarding agent for polycarbonate compositions.

Abstract: A thermoplastic molding composition comprising a polycarbonate resin and a benzotriazole ortho carbonate having an improved level of resistance to deterioration caused by exposure to ultraviolet radiation is disclosed. The ultraviolet stabilizer of the invention conforms to ##STR1## wherein R.sub.1 denotes a hydrogen or a halogen atom or a C.sub.1-4 alkyl or alkoxy group,R.sub.2 and R.sub.3 independently represent a hydrogen atom, a C.sub.1-12 alkyl, a C.sub.1-4 alkoxy group, a phenyl or a phenoxy radical, andR.sub.4 denotes a C.sub.1-12 alkylene or a C.sub.6-30 arylene group. The composition is suitable for the preparation of molded articles having an improved level of resistance to ultraviolet radiation.

Abstract: Thermoplastic molding compositions containing at least one member selected from among aromatic polycarbonate and aromatic polyestercarbonate resins were plasticized by incorporating therewith a small amount of a copolyetherester conforming to ##STR1## wherein x is about 2 to 15, n is about 3 to 10 and y is about 1 to 10. A and A' are end groups which may independently be a hydroxy group, a carboxy radical, a C.sub.1 -C.sub.8 alkoxy or a C.sub.6 -050249762 C.sub.10 aryloxy group. The compositions of the invention are characterized by their improved processability.

Abstract: The invention relates to thermoplastic molding compositions comprising a polycarbonate resin which is rendered resistant to gamma radiation induced yellowing. It was surprisingly found that the incorporation in the resin of an effective amount of benzylic alcohol or its derivatized versions renders the composition resistant to yellowing. The composition of the invention is suitable for the preparation of molded articles having improved resistance to yellowing and to the formation of haze induced upon exposure to gamma radiation.

Abstract: A monoester derived from guerbet alcohol and a monocarboxylic acid or a hydroxy carboxylic acid was found to be an effective mold release agent for a thermoplastic molding composition which comprise an aromatic polycarbonate resin. The alcohol of the invention is a guerbet alcohol having about 20 to 60 carbon atoms and the monoacid is characterized in that it has about 1 to 22 carbon atoms.

Abstract: The invention relates to thermoplastic polycarbonate molding compositions which are rendered resistant to gamma-radiation by incorporating therewith about 0.1 to about 10 percent by weight of a stabilizing agent conforming to ##STR1## wherein R.sub.1 denotes a hydrogen atom or a C.sub.1 -C.sub.4 alkyl, R.sub.2 denotes a hydrogen atom, a C.sub.1 -C.sub.30 alkyl or acyl radical, silyl or pyranyl where said alkyl and acyl radicals may be either branched or linear, n is an integer of from 0 to 70, p is 0 or 1 and m is 1 to 4.

Abstract: 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.

Abstract: 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,n is an integer of from 1 to about 1000,m is an integer of from 1 to about 500,A is a derivative of an aromatic dihydroxy compound,R and R' independently denote a C.sub.1 -C.sub.20 alkyl radical or a C.sub.6 -C.sub.14 aryl radical,which copolymer is characterized in that its relative viscosity measured on a solution of 0.5 g in 100 ml of dichloromethane at 25.degree. C. is at least 1.15.

Abstract: The invention relates to thermoplastic polycarbonate molding compositions comprising a polycarbonate resin and a stabilizing agent conforming to ##STR1## where R.sub.1 and R.sub.2 independently are ##STR2## R.sub.3 is a hydrogen atom, a branched or linear C.sub.1 -C.sub.20 alkyl or a C.sub.1 -C.sub.20 cycloalkyl, and R.sub.5 and R.sub.6 independently are a hydrogen atom or a C.sub.1 -C.sub.3 alkyl, x is an integer of about 1 to 70,y is an integer of about 0 to 70,R.sub.4 is C.sub.2 -C.sub.6 alkyl or cycloalkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.20 alkylaryl or cycloalkylaryl. The agent is homogenically distributed throughout the resin and is present in an amount sufficient to improve the gamma radiation resistance of the composition.

Abstract: The invention relates to thermoplastic polycarbonate molding compositions which are rendered improved resistance to gamma-radiation by the incorporation therewith of about 0.05 to about 5.0 percent by weight of an ester of poly(alkylene)oxide conforming to ##STR1## wherein R is a C.sub.1 -C.sub.20 alkyl, aryl or alkylaryl, Y denotes a hydrogen atom or a C.sub.1 -C.sub.6 alkyl radical, and X is about 1 to 40, preferably 5 to 30.The compositions of the invention exhibit excellent resistance to yellowness and formation of haze which commonly characterize gamma irradiated articles molded from polycarbonate.

Abstract: A Chemical Blowing Agent (CBA) concentrate was developed comprising a modifying agent and a chemical blowing agent. The CBA is characterized in that its decomposition products contain a primary amine. The modifying agent is a blend of a maleic anhydride copolymer and a butadiene based rubber. It was surprisingly found that resin degradation which often accompanies foam moldings using a CBA of the present type and is expressed in terms of a reduction in the molecular weight of the resin, is much reduced upon the incorporation of the modifying agent and chemical blowing agent of the invention. The concentrate may optionally further comprise a polymeric resin component.

Abstract: A polycarbonate molding composition comprising an aromatic polycarbonate resin and a compound conforming to ##STR1## wherein n, x and y independently are 0 or 1 and R is a C.sub.1 -C.sub.20 hydrocarbon radical was found to have advantageous hydrolytic stability.

Abstract: A Chemical Blowing Agent (CBA) concentrate was developed comprising a modifying agent and a chemical blowing agent. The CBA is characterized in that its decomposition products contain a primary amine. The modifying agent is a blend of a maleic anhydride copolymer and a butadiene based rubber. It was surprisingly found that resin degradation which often accompanies foam moldings using a CBA of the present type and is expressed in terms of a reduction in the molecular weight of the resin, is much reduced upon the incorporation of the modifying agent and chemical blowing agent of the invention. The concentrate may optionally further comprise a polymeric resin component.