Abstract: The invention relates to amorphous polyesterimides which comprises 50 to 100 mole-% of units of formula II ##STR1## and from 0 to 50 mole-% of units of formula ##STR2## in which units R.sub.1 and R.sub.2, independentlyof one another, are H, branched or unbranched alkyl radicals having 1 to 6 carbon atoms, branched or unbranched alkoxy radicals having 1 to 6 carbon atoms, or F, Cl or Br.The polyesterimides according to the invention are suitable for the production of molding compositions, moldings, fibers and films.

Abstract: Process for the manufacture of poly(arylene sulphide) consisting in polymerizing, in one stage, a reaction mixture comprising the following constituents:an alkali metal sulphide (a);a polar organic solvent (b);an alkali metal carboxylate (c);water (d);a dihalogenated aromatic compound (e); characterized by the combination, in the said mixture, of a molar ratio (R.sub.H.sbsb.2.sub.O) of the water (d) to the sulphide (a) used such that:2.6.ltoreq.R.sub.H.sbsb.2.sub.O .ltoreq.3.8and of a molar ratio (R.sub.ADD) of the carboxylate (c) to the sulphide (a) used such that:0.20.ltoreq.R.sub.ADD .ltoreq.0.

Abstract: Object: The present invention was conceived in light of the above-described prior art. The object of this invention is to provide a method for preparing optical-grade polycarbonate compositions, which method is able to prepare with good productivity optical-grade polycarbonate compositions that have not only excellent clarity and water resistance, but also excellent retention stability such as heat stability and hue stability when molten and a low content of inclusions and impurities, and that undergo little heat deterioration.Constitution: The method for preparing optical-grade polycarbonate compositions according to this invention, which method comprises the melt-polycondensation of an aromatic dihydroxy compound and a diester carbonate in the presence of a catalyst, followed by the addition of additives [B] while the polycarbonate [A] obtained as the reaction product is in a molten state, and mixing.

Abstract: There are disclosed carbonate polymers having ethenyl aryl moieties. Such carbonate polymers are prepared from one or more multi-hydric compounds and have an average degree of polymerization of at least about 1 based on multi-hydric compound. These polymers, including blends thereof, can be easily processed and shaped into various forms and structures according to the known techniques. During or subsequent to the processing, the polymers can be crosslinked, by exposure to heat or radiation, for example, to provide crosslinked polymer compositions. These compositions have a good combination of properties, including for example, processability into shaped articles having unexpectedly good combinations of toughness, solvent resistance, ignition resistance, modulus and resistance to thermal linear expansion.

Abstract: A graft polymer based on an ultrahigh molecular weight polyethylene having a molecular weight of at least 1,000,000 g/mol and an alkenecarboxylic acid or alkenecarboxylic anhydride as the graft monomer; the polymer has modified and improved properties compared with ultrahigh molecular weight polyethylene. The preparation and use thereof are also described.

Abstract: A solventless thermosettable composition comprising a dialkenylbenzene and an effective amount of an alkylbenzenesul fonic acid curina aqent exhibits reduced tendency to gel during cure with the addition of a polyarylamine. The cured material, which is particularly useful in electrical/electronic applications, exhibits low dielectric constant and good fracture toughness.

Abstract: Polycarbonate oligomers having hydroxy end groups are produced by a melt reaction with bisphenol-A and a basic catalyst. The oligomers may then be reacted with chloro end-group siloxanes in the presence of a solvent and an acid acceptor to yield polycarbonate-polysiloxane block co-polymers. The melt reaction occurs at elevated temperature without the direct use of phosgene gas.

Abstract: Processes for producing a polyoxymethylene copolymer includes forming a crude polyoxymethylene copolymer by subjecting a reaction system containing trioxane, a cyclic ether or cyclic formal comonomer, and a catalyst (e.g., boron trifluoride or a coordination compound thereof) to copolymerization reaction conditions. During copolymerization, both the total content of impurities and catalyst in the copolymerization reaction system are adjusted. In this regard, the impurities content (i.e., those compounds which form unstable end groups in the polyoxymethylene copolymer and/or those compounds having a chain-terminating or chain-transfer function) in the copolymerization reaction system is adjusted to 1.times.10.sup.-2 mole percent or less based on the total monomer amount, while the the content of the catalyst in the copolymerization reaction system to between 1.times.10.sup.-3 to 1.times.10.sup.-2 mole percent based on the total monomer amount.

Abstract: An electron radiation curing type adhesive which is excellent for adhesion between a polyester film and a metal material, and which is excellent in retort resistance or the like where the adhesive is used for food cans. There is also disclosed a metal plate laminated with a polyester film. The electron radiation curing type adhesive is composed of a resin composition in which 2 to 200 weight part of polyester group oligomer having unsaturated double-bonds, with respect to 100 weight parts of polyester resin, has added thereto 0.5 to 250 PHR of a stress relaxation agent. The polyester film and a metal plate are laminated with each other by means of the above-mentioned adhesive, and then the film and the metal plate are bonded together by heating and curing the adhesive by irradiation using electron radiation.

Abstract: The present invention is directed towards liquid coating formulations containing a mixture of a curable polyester or diester resin, an amino crosslinking agent and a pigment wherein the pigment is dispersed in the coating solution at a weight loading .level such that the pigment to binder ratio falls within the range of from greater than 2.0 to 1 up to about 5.0 to 1. The polyester or diester resins employed in the coating formulations are such that when formulated with an appropriate crosslinking agent, acid catalyst and pigment within the ranges stated above and properly applied to a substrate and cured, produce coatings having a minimum Knoop hardness of at least about 4 and a flexibility (T-bend test) of less than 6, generally less than about 5, and a MEK rub value of greater than 5, more preferably at least about 15 and most preferably greater than 50.

Abstract: Substantially amorphous, high molecular weight polyaniline which is processable into shaped articles such as fibers is disclosed. Polyaniline base made by standard procedures is subjected to extraction to remove impurities and lower molecular weight fractions. The resulting high molecular weight base, which is partially crystalline and insoluble in NMP and concentrated H.sub.2 SO.sub.4, is converted to an amorphous material soluble in NMP and concentrated H.sub.2 SO.sub.4, by a two step process involving conversion to a salt, and reconversion to a base. Fibers prepared from the high molecular weight material exhibit conductivities in the range of about 50 to 100 S/cm.

Abstract: An aromatic polyester:(1) consisting essentially of a polymer unit A of the formula (1), ##STR1## a polymer unit B of the formula (2), ##STR2## and a polymer unit C of the formula (3), ##STR3## the above polymer units being bonded together forming ester linkages in a polymer chain,(2) the polymer unit C being contained in an amount of 10 to 35 mol % based of the total amount of the polymer units B and C,(3) the polyester being semicrystalline,(4) the polyester having an inherent viscosity, measured in a phenol/1,1,2,2-tetrachloroethane mixed solvent (weight ratio=60/40) at 35.degree. C., of at least 0.3; a process for its production; and a resin composition containing it.

Abstract: Anhydrous polymeric metal terephthalate and isophthalate fibers are disclosed and a method for making them wherein said metal is selected from the group consisting of calcium, barium, magnesium and zinc, said fibers have an average aspect ratio of greater than about 5:1. These fibers are very useful additives serving as property extenders and/or reinforcing agents in polymeric compositions and articles molded therefrom.

Abstract: Isotropic polyesters containing a repeat unit derived from 4,4'-bis(3-hydroxyphenoxy)biphenyl, and especially poly(imide-esters) containing that diol, trimellitic anhydride and at least one diamine and/or aminocarboxylic acid. Such polyesters have a good combination of physical and melt properties, making them easy to shape and them useful for mechanical parts and fibers.

Abstract: A process for forming polyesters that comprises the steps of esterifying a terephthalic acid and an ethylene glycol to produce an esterification product containing a bis (betahydroxyethyl) terephthalate, and continuously polycondensing the obtained esterification product to form a polyester. In both the esterifying step and the polycondensing step, a reaction catalyst consisting of a compound of antimony and a compound of titanium is used. The weight ratio of the compound of antimony to the compound of titanium is 0.01 to 100. The process of the present invention can considerably reduce both the esterification time and the polycondensation time and provides good color, reduced diethylene glycol content and reduced condensation of terminal carboxyl groups in the resulting polyesters.

Abstract: It is advantageous to prepare oligomers of polybenzazole polymers by reaction of AA-PBZ monomer with an excess of BB-PBZ monomer. The resulting oligomer dopes may be stored at a temperature at which they remain pumpable until such time as the dope can be advanced to higher molecular weight by adding additional AA-PBZ monomer. The molecular weight of the polymer may be adjusted by controlling the amount of chain extender and/or chain terminator added to oligomer mixtures as they are advanced to final molecular weight.

Abstract: Poly(phenylene) that is substantially free of insoluble material is prepared by the polymerization of a lithioarylhalide compound in the presence of a polar aprotic compound such as hexamethylphosphoramide, N,N,N',N'-tetramethylethylenediamine or hexamethylphosphorous triamide. The preferred reaction involves the polymerization of 1-bromo-4-lithiobenzene in the presence of hexamethylphosphoramide. The 1-bromo-4-lithiobenzene may be synthesized by reacting 1,4-dibromobenzene with t-butyllithium. These same types of reactions can also be used to synthesis other benzenoid polymers.

Abstract: Novel heat-stable imido polymers, well adapted for the production of prepregs, are prepared by copolymerizing (a) at least one N,N'-bisimide with (b) at least one hindered aromatic diprimary diamine, (c) optionally, at least one unhalogenated comonomer other than a bisimide, (d) optionally, an imidazole compound, (e) at least one diamino-s-triazine, and (f) at least one chlorinated or brominated epoxy resin (f1), or N,N'-alkylenebistetrahalophthalimide (f2), or halogenated aromatic compound containing two (meth)-allyloxylated benzene nuclei (f3), or unhalogenated epoxy resin (f4).

Abstract: A halogenated copolycarbonate, which contains reduced levels of phenolic end groups and end groups which result from side reactions of process chemicals with the copolycarbonate chain, has improved resistance to the degradation-inducing effects of such end groups and has improved washability.

Abstract: Disclosed is a process for the preparation of poly(ester-carbonates) wherein (1) an aromatic diol, (2) methyl phenyl carbonate and (3) an alkyl carboxylate ester component selected from an aromatic dicarboxylate ester, a hydroxy aromatic carboxylate ester or a mixture thereof are contacted in the presence of a transesterification/polycondensation catalyst under transesterification/polycondensation conditions of pressure and temperature.