Abstract: Polyester-phosphonates, polycarbonatophosphonates and polyester-carbonatophosphonates having improved impact strength and notched impact strength as compared with melt-condensation products can be prepared in such a way that, in the first stage, oligophosphonates with hydroxyl end groups are prepared by melt-transesterification and melt-condensation and these are subjected in a second stage to a phase boundary process.

Abstract: Blends of aromatic polyestercarbonate copolymers with aromatic polycarbonate resins provide improved low temperature toughness while maintaining tensile strength essentially equivalent to the polycarbonate component. Particularly preferred components are polycarbonates of bisphenol A and a polyestercarbonate derived from bisphenol A, phosgene and terephthaloyl and isophthaloyl chlorides.

Abstract: A process for modifying a poly(alkylene carbonate) polyahl, which comprises reacting the poly(alkylene carbonate) polyahl, with at least one modifier having at least one active hydrogen moiety or cyclic anhydride, optionally in the presence of a catalyst under transesterification conditions to form a modified poly(alkylene carbonate) polyahl wherein the modifier is chemically bonded to the backbone of the poly(alkylene carbonate) polyahl.

Abstract: The invention is a process for modifying and increasing the molecular weight of a poly(alkylene carbonate) polyahl, which comprises contacting the poly(alkylene carbonate) polyahl, with at least one modifier having a plurality of moieties that are reactive with the carbonate and/or acting hydrogen moieties of the poly(alkylene carbonate) polyahl at elevated temperatures and at a pressure at which at least one compound other than a monoalkylene glycol which compound is at least as volatile as a tetraethylene glycol is removed in the gaseous state from the poly(alkylene carbonate) polyahl.

Abstract: A process for the addition of pendant groups to polyarylenes comprises the steps of charging a reaction vessel with a solution of a polyarylene and a Friedel-Crafts catalysts; said polyarylene having the formula ##STR1## adding to the reaction vessel a pendant forming group G, wherein G is selected from the group consisting of sulfonyl halides, sulfonamide halides, alkylhalides, acylhalides and phosphorus acid halides; heating the contents of the reaction vessel to form a substituted polyarylene having the formula ##STR2## and thereafter recovering the substituted polyarylene. The substituted polyarylenes are novel and have utility as a semipermeable membrane and a process for the separation of gases therewith is also provided.

Abstract: The present invention relates to aromatic polyester(carbonate)s with end groups of the formula (Ib) ##STR1## optionally mixed with known aromatic polyester(carbonate)s, their preparation by the phase boundary process or in homogeneous solution and their modification by irradiation.

Abstract: A thermoplastic composition includes compatible blends of a mixed polycarbonate comprising units derived from a first dihydric phenol, which is a bis(hydroxyaryl) sulfone, a second dihydric phenol; and one or more thermoplastic condensation polymers containing hetero groups.

Abstract: Blends of bisphenol A polycarbonate with poly(ester-imides) and poly(ester-imide-amides). The poly(ester-imides) and poly(ester-imide-amides) contain repeating units from 0 to 95 mol percent of aromatic dicarboxylic acids containing 8 to 16 carbon atoms and having at least three carbon atoms between carboxyl groups or esters thereof, repeating units from 0 to 95 mol % 1,4-cyclohexanedimethanol, repeating units from 5 to 100 mol % trimellitic acid or anhydride, and repeating units from 5 to 100 mol % 4-(aminomethyl)cyclohexanemethanol, and wherein the mol % of the repeating units from the trimellitic acid or anhydride does not exceed the mol % of repeating units from the 4-(aminomethyl)cyclohexanemethanol.

Abstract: Thermoplastic moulding compounds obtained from: from 98 to 10 parts, by weight, of aromatic polycarbonates having an average molecular weight M.sub.w (by light scattering) of from 10,000 to 200,000; from 60 to 0 parts, by weight, of polyalkylene terephthalate; from 30 to 0 parts, by weight, of graft polymer of one or more ethylenically unsaturated monomers on a rubber; and from 90 to 2 parts, by weight, of a polyester of terephthalic acid and a diol containing at least one diaryl sulphone group in the molecule and, optionally, an aliphatic diol in addition.

Abstract: Novel heat resistant polycarbonates are provided which are the polymerized reaction products of:(i) a carbonate precursor; and(ii) at least one dihydric phenol selected from dihydric phenols represented by the general formulae ##STR1## wherein: each R.sup.1 is independently selected from halogen radicals, monovalent hydrocarbon radicals, and monovalent hydrocarbonoxy radicals;each R.sup.2 is independently selected from halogen radicals, monovalent hydrocarbon radicals, and monovalent hydrocarbonoxy radicals;R.sup.4 and R.sup.5 are independently selected from monovalent hydrocarbon radicals;R.sup.3 is selected from hydrogen and monovalent hydrocarbon radicals, with the proviso that if R.sup.3 is a hydrogen radical then at least one of the monovalent hydrocarbon radicals represented by R.sup.4 and R.sup.5 contains at least two carbon atoms;R.sup.7 is selected from hydrogen and monovalent hydrocarbon radicals;R.sup.

Abstract: Polycarbonates exhibiting improved heat distortion temperatures which are comprised of the polymerized coreaction products of (i) a carbonate precursor, and (ii) at least one particular spiro dihydric phenol. These carbonate polymers are useful in the production of molded articles, sheet glazing materials, and films.

Abstract: Compositions comprising predominately a polycarbonate resin, e.g., poly(bisphenol A carbonate), and a polyester resin, e.g., poly(1,4-butylene terephthalate), alone, or in combination with one or more second resins, are melt stabilized with monosodium phosphate and/or monopotassium phosphate.

Abstract: A thermoplastic composition includes compatible blends of a mixed polycarbonate comprising units derived from a first dihydric phenol, which is a bis(hydroxyaryl) sulfone, a second dihydric phenol; and one or more thermoplastic condensation polymers containing hetero groups.

Abstract: Copolyester-carbonate blends exhibiting improved processability comprised of, in admixture:(i) at least one copolyester-carbonate resin; and(ii) a processability improving amount of at least one halogenated polycarbonate resin.

Abstract: Copolyester-carbonate resin compositions exhibiting improved processability comprised of (i) at least one copolyester-carbonate resin derived from (a) a carbonate precursor; (b) at least one difunctional carboxylic acid or a reactive derivative thereof; and (c) at least one dihydric phenol wherein the bridging divalent hydrocarbon group connecting the two aromatic residues is represented by the general formula ##STR1## wherein R represents a straight chain alkyl radical containing from 1 to 5 carbon atoms.

Abstract: Thermoplastic compositions which are a solution of polycarbonate and poly(ethylene terephthalate) resins are described. These solutions are produced by melt admixture of a polycarbonate prepared from bis(3,5,dimethyl-4-hydroxy phenyl) sulfone and 2,2-bis(4-hydroxy-phenyl) propane and polyethylene terephthalate) to provide the composition with a single glass transition point.

Abstract: A process for producing polycarbonate is described, comprising reacting a chloroformate group-containing polycarbonate oligomer with an aqueous alkaline solution of a compound containing at least three functional groups and, thereafter, interfacial polycondensing the above-obtained reaction product with an aqueous alkaline solution of a dihydric phenol compound. The thus-produced polycarbonate has good melt characteristics compared with conventional polycarbonates, and the dependence of melt viscosity on a rate of shear is large. Thus, the polycarbonate of the invention is suitable for extrusion molding, particularly for blow molding using an extrusion molding machine, and can provide good quality sheets or molds.

Abstract: Thermoplastic compositions comprised of, in physical admixture, from:(i) about 1 to about 85 weight percent of at least one randomly branched aromatic polycarbonate resin; and(ii) about 15 to about 99 weight percent of at least one aromatic copolyester-carbonate resin.

Abstract: The new thermoplastic copolyester carbonates which are based on polybutylene glycols and hexahydrophthalic acid or trimethyladipic acid, as well as admixtures of copolyester carbonates of this type with known polycarbonates are suitable for thermoplastic moulding compositions, particularly where good stability to solvents, such as petrol, is required.

Abstract: A thermoplastic molding composition comprising an aromatic carbonate polymer and a polyester derived from a cyclohexanedimethanol.

Abstract: Segment-ester polycarbonates have improved resistance to high heat distortion when portions of the polymer contain units derived from 4,4'-cyclohexylidenediphenol and derivatives thereof. Preferred high heat distortion segment-ester polycarbonates include the copolyestercarbonate with segments derived from isophthalic acid and 4,4'-cyclohexylidenediphenol and/or terephthalic acid and 4,4'-cyclohexylidenediphenol. Films made of the segment-ester copolycarbonates have improved resistance to high heat distortion.

Abstract: Described herein are molding compositions comprising a blend of a poly(aryl ether), a polyester and a compatibilizing amount of an aromatic polycarbonate. These compositions are especially suited for molding articles useful in electrical applications.

Abstract: Process for the preparation of polyesters and poly(ester-carbonates) comprising heating aromatic diol polycarbonates and esters of dicarboxylic acids in the presence of ester exchange and polymerization catalysts.

Abstract: High-molecular polyesters which are distinguished by good processability, a high glass transition temperature, mechanical strength and clear transparency are reproducibly obtained by transesterifying and polycondensing bisphenols with diaryl terephthalates and/or diaryl isophthalates in the presence of an aromatic polycarbonate having a molecular weight of 600 to 15,000.

Abstract: Thermoplastic molding compositions are provided comprising from about 80 to 98% by weight of a polycarbonate obtained from diphenols, having a mean weight-average molecular weight M.sub.w from about 10,000 to 200,000 and from about 20 to 2% by weight of a polyester-carbonate and/or polyether-carbonate with mean weight-average molecular weights M.sub.w of from about 50,000 to 300,000, which contain between about 50 and 70% by weight of soft polyester segments or soft polyether segments with mean number-average molecular weights M.sub.n of from about 10,000 to 20,000. The instant invention also relates to a process for the production of said thermoplastic molding compositions.

Abstract: Poly(ester/carbonates) are produced by adding phosgene to a reaction mixture of bisphenol A and terephthalic acid as ester-forming reactants, at mole ratios in the range between 2.0:0.8 and 2.0:1.3, in which the reaction medium consists essentially of pyridine, the concentration of bisphenol A plus terephthalic acid is in the range between 5 and 50 grams per 100 ml of pyridine; and the phosgene is added under agitation at a rate of at least 0.07 gm-mmole/liter.sec. The process is carried out at temperature in the range between 50.degree. C. and 115.degree. C. and not below the temperature given by the Arrhenius equation:1nU=10-12/0.001987 Twhere U is phosgene feed rate in gram-moles/liter.second and T is absolute temperature of the reaction mixture (degrees Kelvin). Preferred phosgene feed rates are at least 0.13 gram-millimoles/liter.second; and preferred temperatures of the reaction mixture are between 60.degree. C. and 80.degree. C.

Abstract: The present invention relates to a process for preparation of molding resins comprising heating and kneading an isocyanate prepolymer derived from a hydroxyl-terminated polymer and a polyfunctional isocyanate with a hydroxyl-terminated low-molecular-weight polybutylene terephthalate in the presence of reinforcing filler by means of an extruder.