Abstract: The invention relates to mixtures of special polyesters and/or special polyester carbonates with amorphous thermoplastics and/or with partly crystalline thermoplastics and/or with rubbers and/or with graft polymers useful for molding articles.

Abstract: The invention relates to the use of nucleus-brominated phthalic acid derivatives, optionally in combination with polyalkylene oxides corresponding to formula (V) ##STR1## in which R is H, C.sub.1-6 alkyl, tetrahydropyranyl or a silyl group,R' is H or C.sub.1-6 alkyl andx is an integer of 1 to 100,for stabilizing thermoplastic polycarbonates against the effect of .gamma.-rays.

Abstract: The mixtures according to the present invention of polyalkylene terephthalates, certain new polycarbonates and/or polyester-carbonates and elastomers have a particularly favourable low temperature strength/heat distortion point relationship compared with conventional moulding compositions containing known polycarbonates. The mixtures are used for the production of, in particular, shaped articles.

Abstract: A thermoplastic molding composition is disclosed containing a polycarbonate resin and(i) 0.1 to 10.0 percent of a polyalkylene oxide corresponding to formula (I) ##STR1## in which R represents H, C.sub.1-6 alkyl, tetrahydropyranyl or a silyl radical,R' represents H or C.sub.1-6 alkyl andx is an integer of 1 to 100, and(ii) 0.1 to 10 percent of an aromatic compound which contains at least one sulfonic acid ester substituent, said percent being relative to the weight of said polycarbonate. The composition which is resistant to the effects of gamma radiation is suitable for the preparation of sterilizable medical instruments.

Abstract: Photoconductive recording material which incorporates in an outermost layer a siloxane-copolymer including at least one polysiloxane block that is copolymerized with aromatic carbonate units, wherein the polysiloxane block(s) consist(s) of 5 to 200 chemically bonded diorgano siloxy units in which the organic substituents are selected from the group consisting of an alkyl, an aralkyl, an alkaryl and an aryl group, and said block(s) is (are) present in an amount by weight in the range of 0.3% to 6% with respect to the total weight of said copolymer.

Abstract: Photoconductive recording material which incorporates in an outermost layer a siloxane-copolymer including at least one polysiloxane block that is copolymerized with aromatic ester units or with aromatic carbonate units and aromatic ester units, wherein the polysiloxane block(s) consist(s) of 5 to 200 chemically bonded diorgano siloxy units in which the organic substituents are selected from the group consisting of an alkyl, an aralkyl, an alkaryl and an aryl group and said block(s) is (are) present in an amount by weight in the range 0.3% to 80% with respect to the total weight of said copolymer.

Abstract: A three-step process for the production of solventless polycarbonate is disclosed. Accordingly, a mixture of two different oligocarbonates each prepared by the interfacial method, is prepared in the first process step. In a second step, the mixture is crystallized. The third step entails polycondensation. In an additional embodiment of the invention the first step uses a mixture of one oligocarbonate with a suitable monomer.

Abstract: A photoconductive recording material having a conducting electrode element coated with one or more layers, one or more of said layers incorporating one or more polyester carbonate copolymers, wherein the aromatic carbonate units are present in the range of 10 to 48 mole % of said copolymer and correspond to the general formulae (I), and wherein the aromatic ester units are present in the range of 52 to 90 mole % of said copolymer and have one or more of the compositions represented by the general formulae (II and III) described herein.

Abstract: A carbonate corresponding to formula (I) ##STR1## in which R is aromatically bound polystyrene moiety and --O--D--O-- is a diphenolate moiety in which --D-- is a divalent group containing 6 to 30 carbon atoms and r is 0 or 1 is disclosed. The carbonate is useful as a flow aid for thermoplastic molding compositions.

Abstract: The invention relates to ternary thermoplastic mixtures of polycarbonates, polyurethanes and graft polymers and, optionally, standard additives and to processes for the production of these mixtures.

Abstract: Polyesters and polyester carbonates ofa) aromatic diphenols,b.sub.1) aliphatic and/or cycloaliphatic and/or aromatic dicarboxylic acids and optionallyb.sub.2) carbonic acid,containingb.sub.1) in a quantity of 0.1 to 100 mol-% andb.sub.2) in a quantity of 0 to 99.9 mol-%, based on (b.sub.1 +b.sub.2), in which 0.

Abstract: A foamable thermoplastic molding composition comprising:a) an aromatic polycarbonate, andb) 0.1 to 5% by weight of a hydrate of an inorganic salt, is disclosed. The salt is inert to the polycarbonate and is capable of releasing its water of hydration only at a temperature above 100.degree. C.The composition which may optionally further contain c) up to 10% by weight of a nucleating agent, and d) up to 30% by weight of glass fibers is characterized by its good pore structure.

Abstract: The invention relates to the use of the diphenol corresponding to formula (I) ##STR1## for the production of high molecular weight, thermoplastic, aromataic polycarbonates, to a process for the production of these polycarbonates and to the new thermoplastic having improved heat resistance obtainable by the process.

Abstract: The new polyester carbonate-polysiloxane block copolymers having recurrent structural units of the following formulae ##STR1## have improved resistance to petrol compared with known polyester carbonate-polysiloxane block copolymers. They are used for the manufacture of moulded products, in particular those used under the engine bonnet of a motor vehicle or as external parts of motor vehicles.

Abstract: The present invention relates to mixtures containing 1) polycarbonates and 2) specific polymers of C.sub.10 -C.sub.40 -alkyl (meth)acrylates and if appropriate styrenes or C.sub.1 -C.sub.4 -alkyl methacrylates, and if appropriate customary additives, the preparation of these mixtures and their use for the production of petrol-resistant shaped articles.

Abstract: The present invention relates to a process for the preparation of polydiorganosiloxane block copolycarbonates having special bridging members between the siloxane blocks and the carbonate blocks, and the polydiorganosiloxane block copolycarbonates which are obtainable by the process according to the invention and with which optionally further customary additives can be mixed.

Abstract: The invention relates to a process for coating moldings via co-extrusion with a UV-absorber-containing layer containing special dimeric UV absorbers and to the moldings coated with a corresponding layer.

Abstract: Thermoplastic polydiorganosiloxane/polycarbonate block copolymers based on dihydroxydiphenylcycloalkanes corresponding to the following general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, halogen, preferably chlorine or bromine, C.sub.1 -C.sub.8 alkyl, C.sub.5 or C.sub.6 cycloalkyl, C.sub.5 -C.sub.10 aryl or C.sub.7 -C.sub.12 aralkyl, preferably phenyl-C.sub.1 -C.sub.4 -alkyl, in particular benzyl: m represents an integer of from 4 to 7, preferably 4 or 5;R.sup.3 and R.sup.4 may be chosen individually for each X and independently represent hydrogen or C.sub.1 -C.sub.12 alkyl; andX represents carbon; with the proviso that R.sup.3 and R.sup.4 both represent alkyl on at least one atom X,having an average molecular weight M.sub.w (weight average) of 10 000 to 300 000, a content of aromatic polycarbonate of 21 to 99.5% by weight and a content of polyorganosiloxane of 79 to 0.5% by weight.

Abstract: A process for the preparation of a phenol and solvent free polycarbonate resin is disclosed comprising(i) forming an oligomeric polycarbonate comprising structural units based on a diphenol corresponding to ##STR1## wherein R.sup.1 and R.sup.2 independently of one another denote a member selected from the group consisting of a hydrogen atom, a halogen atom, C.sub.1-8 alkyl, C.sub.5-6 cycloalkyl, C.sub.6-10 aryl and C.sub.7-12 aralkyl radicals,m is an integer of from 4 to 7,X represents carbon andR.sup.3 and R.sup.4 are individually selected for each X and independently of one another represent a hydrogen atom or a C.sub.1-6 alkyl radical, with the proviso that for at least one X atom, both R.sup.3 and R.sup.4 are alkyl radicals, and(ii) condensing said oligomeric polycarbonate at a temperature in the range of of 140 to 350.degree. C.

Abstract: The invention relates to a thermoplastic molding composition comprising(A) from 10 to 98 parts by weight of a polydiorganosiloxane-polycarbonate block copolymer having a weight average molecular weight of from 10,000 to 200,000 and containing from 75 to 97.5 wt. % of aromatic carbonate structural units and from 25 to 2.5 wt. % of polydiorganosiloxane structural units;(B) from 2 to 90 parts by weight of a thermoplastic, aromatic polycarbonate having a weight average molecular weight of at least 10,000, andcontaining bifunctional carbonate structural units corresponding to ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.12 aralkyl;m represents an integer of from 4 to 7,R.sup.3 and R.sup.4, which may be selected individually for each X, independently represent hydrogen or C.sub.1 -C.sub.6 alkyl; andx represents carbon,with the proviso that, on at least one atom X, R.sup.3 and R.sup.