Abstract: Aromatic polyesters based on diphenols and iso- and/or terephthalic acid are produced by transesterification of esters of the diphenols with the aromatic dicarboxylic acids in the melt by first reacting the aromatic dicarboxylic acids with a stoichiometric excess of the diphenol esters to form oligomers and then condensing the resulting oligomers to the aromatic polyesters with elimination and removal by distillation of diphenol ester.

Abstract: The present invention relates to mixtures of polycarbonates and polyisobutylenes, polydiorganosiloxane-polycarbonate block cocondensates being employed as the polycarbonates and polyisobutylene homopolymers or polyisobutylene-isoprene copolymers as the polyisobutylenes. If appropriate, the moulding compositions can also contain ethylene homo- or copolymers.

Abstract: The invention relates to the use of mixtures consisting of 5 to 95% by weight of an aromatic polycarbonate of which the linear chains contain from 0.1 mol-% to 50 mol-% bifunctional structural units corresponding to formula (1) ##STR1## and 95 to 5% by weight of a thermoplastic styrene polymer and, optionally, standard additives as substrates for optical storage media.

Abstract: The invention relates to a process for the production of vinyl copolymers with grafted-on polycarbonate chains, to the grafted vinyl copolymers obtainable by the process according to the invention, to their use as modifiers for mixtures of thermoplastic polycarbonates and thermoplastic polystyrenes, to such mixtures themselves and to the use of such mixtures as substrates for optical discs.

Abstract: The invention relates to a process for the production of solutions of polycarbonates in organic inert solvents which is characterized in that from 2.5 ppm to 100 ppm phosphorous acid, based on the weight of the diphenol used for polycarbonate production, are added to the emulsion of the two phases obtainable by the known two-phase interfacial process and the emulsion is worked up in known manner.

Abstract: Fluorinated alkylamidosulphonates of the formula ##STR1## in which R.sup.1 represents hydrogen, alkyl or fluorinated alkyl,R.sub.F represents fluorinated alkyl andM.sup..sym. represents an equivalent of a cation,a process for their preparation from the corresponding fluorinated alkylamidosulphonyl chlorides, their use as flame retardants for polycarbonate moulding compositions, and polycarbonate moulding compositions containing them.

Abstract: The present invention relates to thermoplastic moulding compositions containing polydiorganosiloxane/polycarbonate block copolymers, elastomeric polymers and, if appropriate, polyalkylene terephthalates.

Abstract: The present invention relates to thermoplastic mixtures of 90 to 20% by weight of an aromatic polycarbonate with an Mw of 15,000 to 25,000 and p-(iso-C.sub.8 -C.sub.9 -alkyl)-phenyl end groups and 10 to 80% by weight of a polystyrene with an Mw of 80,000 to 400,000, and to their use as substrates for optical data memories.

Abstract: The present invention is related to polycarbonate molding compositions containing a co-precipitate of a polycarbonate resin and a fluoropolymer. This co-precipitate was found to be suitable as an additive for polycarbonate resins because it offers improved dispersibility with the resin and good flammability performance as well as aesthetic characteristics. The co-precipitate is prepared by first mixing an aqueous dispersion of a fluoropolymer with a polycarbonate solution and then precipitating both using a suitable precipitation agent. After isolation washing and drying the co-precipitate of the invention is suitable for incorporation in a polycarbonate resin optionally with known flame retarding agents. Molded parts prepared from the compositions of the invention are characterized by their improved homogeneity and flame retardance.

Abstract: The present invention relates to the preparation of thermoplastic poly-(diorganosiloxane)/polycarbonate block copolymers containing monoalkylphenyl or dialkylphenyl end groups by the phase boundary process, and to the block copolymers which can be obtained by the process.

Abstract: Block copolyesters based on polyalkylene terephthalates which contain polydiene blocks show an extremely low deformation even when they are processed into thin articles. They still have a crystallinity which is decreased by less than the ratio corresponding to the polydiene portion.

Abstract: Block copolyamides consisting of from 1 to 80% by weight of hydrogenated telechelic diene polymers having M.sub.n molecular weight of from 400 to 6000 and from 99 to 20% by weight of polyamides or polyamide-forming components.

Abstract: A block copolymer is produced fromI. 1 to 60% by weight of at least one telechelic diene polymer containing terminal carbonate ester, --OH--, --NH.sub.2 --, carboxylic acid or carboxylic acid ester groups and having a molecular weight M.sub.n of from about 400 to 1300, andII. 99 to 40% by weight of at least one polyamide or polyamide-forming component.

Abstract: Copolymers of (a) one or more .alpha.-olefins having the formula (A) ##STR1## wherein R is a C.sub.1 -C.sub.16 alkyl group or a phenyl group; and (b) one or more substituted .alpha.-olefins having the formula (B) ##STR2## wherein R.sup.1 is a hydrogen atom or a methyl group, R.sup.2 is a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group, and Z is an --OH, --COOH, ##STR3## in which R.sup.3 is a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group, and each of R.sup.4 and R.sup.5 is a C.sub.1 -C.sub.4 alkyl group, said copolymers having from 1 to 50% by weight of the monomers of formula (B) incorporated therein in polymerized form and a melt flow index (MSI 230/5) of from 2 to 20 g/10 min. and a process for their manufacture.

Abstract: Impact-resistant polyamide moulding compositions consisting of from 35 to 99% by weight of polyamides and from 1 to 65% by weight of partly cross-linked polymer mixtures, comprising from 5 to 80% by weight of copolymers of ethylene/(meth)acrylic acid (esters) or corresponding graft polymers and from 95 to 20% by weight of polybutadiene rubbers, and optionally conventional additives.

Abstract: Optionally reinforced moulding compositions with high impact strength comprising polyamides and graft products of (co)polymers of butadiene and grafted units of methyl(meth)acrylate.

Abstract: A process for the production of modified polypropylene particles by polymerizing vinyl monomers in aqueous suspension wherein (a) an aqueous suspension is prepared which, based on 100 to 2000 parts by weight of water, contains 100 parts by weight of polypropylene particles, 4 to 30 parts by weight of a polar vinyl monomer and based on 100 parts by weight of the monomer, 0.1 to 10 parts by weight of a radical chain polymerization initiator which has a half life of at least 2 h at a temperature of 80.degree. to 135.degree. C. and 10 to 1200 parts by weight of an organic solvent which is capable of swelling polypropylene, of which the boiling point at 760 Torr is at least 100.degree. C. and which is miscible with the monomers in any proportion; (b) the aqueous suspension is heated without decomposition of the initiator, the polypropylene being swollen and the monomer penetrating into the polypropylene, after which (c) the aqueous suspension is kept at temperatures of .gtoreq.85.degree. C.

Abstract: Copolymers or graft copolymers of from 5 to 95% by weight of .alpha.-olefins corresponding to the following general formula (A): ##STR1## wherein R.sup.1 represents alkyl having from 1 to 16 carbon atoms or phenyl; and from 5 to 95% by weight of straight-chain, branch-chain or crosslinked 1,4-polyenes, and a process for the preparation of such polymers, wherein one or more .alpha.-olefins (A) are reacted with a solid catalytic complex based on TiCl.sub.3 and aluminum compounds corresponding to the following general formula (C):Al R.sup.2.sub.n X.sub.3-n (C)wherein R.sup.2 represents C.sub.1 -C.sub.18 alkyl; X represents halogen, preferably chlorine; and 0<n.ltoreq.3; in the presence of a solution of polyene (B) in an inert solvent or in the presence of a gel of polyene (B) swelled in an inert solvent, and the final linkage between component (A) and component (B) is produced at the end of polymerization by the addition of a dihalogen aluminum alkylene corresponding to the following general formula (D):X.

Abstract: Moulding compositions comprising polyamides and (meth) acrylate grafted optionally substituted polybutadienes.

Abstract: A homogeneous thermoplastic mixture comprising (A) from 85 to 99.5% by weight of a propylene-ethylene copolymer containing from 0.5 to 15% by weight of copolymerized ethylene units and having a melt index of from 1.0 to 30 g/min at 230.degree. C. and under a load of 5 kg; and (B) from 0.5 to 15% by weight of a saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 Cst at 20.degree. C.The mixtures of the present invention are particularly suitable for the manufacture of elastic polypropylene based moulded articles which are dimensionally stable in heat.