Abstract: A process is disclosed for the preparation of a polyester polymer or polyester copolymer under superatmospheric pressure conditions in a pipe or tubular reaction under turbannular flow conditions. Reaction material having a glycol equivalents to carboxylic acid equivalents mole ratio of from 1.0:1 to 1.2:1, together with a superatmospheric dense gaseous medium are fed co-currently to the reactor. Dicarboxylic acid and/or diol raw materials may be injected into any of the reaction zones in the process during operation to achieve the overall desired mole ratio balance. The process operates at temperatures of from about 220.degree. C. to about 320.degree. C., with turbannular flow achieved before the polymer product and gas exit the reactor process. The pressure in the reaction zones can be in the range from 15 psia to 2500 psia.

Abstract: The invention relates to an amorphous copolyester having a maximum melt viscosity at 1 radian/second and at about 260 to about 290.degree. C. of about 12000 poise, a glass transition temperature ranging from about 88.degree. C. to about 120.degree. C., and an inherent viscosity of at least about 0.6 dl/g. The amorphous copolyesters comprise the reaction product of a diol component and a dicarboxylic acid component. The diol component comprises residues of from about 5.0 to about 50 mole % of 2,2'-(sulfonylbis(4,1 -phenyleneoxy))-bis(ethanol) which has the following chemical formula: ##STR1## and from about 50 to about 95 mole % of a mixture of at least two diols selected from the group consisting of ethylene glycol, neopentyl glycol, 1,3-propanediol, 1,4-butanediol, 1,4-cyclohexanedimethanol, and mixture thereof. The dicarboxylic acid component comprises residues of terephthalic acid, isophthalic acid, 1,4-cyclohexandedicarboxylic acid, 2,6-naphthalene dicarboxylic acid and mixtures thereof.

Abstract: A potassium catalyst is used in combination with a cobalt catalyst to increase the reaction rate and/or reduce the reaction temperature of a melt polymerization process for producing an anisotropic melt-phase forming polymer derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, aromatic hydroxycarboxylic acid, aromatic diol, at least a portion of which is resorcinol and at least one aromatic dicarboxylic acid, compared to a like process wherein either catalyst is used alone.

Abstract: The invention relates to polymers which form cholesteric phases, to a process for their preparation and to their use.Novel polymers and oligomers which form cholesteric phases essentially consist, as molecular building blocks, ofA. at least one bifunctional chiral molecular building block which contains at least one cyclic structural element other than a monosubstituted p-phenylene group,B. at least one bifunctional achiral or racemic molecular building block which contains at least one cyclic structural element containing at least four ring members, andC. at least one bifunctional molecular building block which can be either chiral or achiral, cyclic or acyclic, and is different from the molecular building blocks A and B actually employed,with the proviso that the molecular building block A is not derived exclusively from camphoric acid.

Abstract: A polyester polymer includes a dicarboxylic acid or its ester-forming derivative and a dihydroxy compound, in which the dicarboxylic acid contains an alicyclic dicarboxylic acid and optionally an aromatic dicarboxylic acid, and the dihydroxy compound contains a compound of formula (1): ##STR1## wherein R.sub.1 represents a C.sub.1-4 alkylene group; and R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represents a hydrogen atom, a C.sub.1-4 alkyl group, an aryl group or an aralkyl group which may be the same or different. Also, polyester moldings of disc substrates, lenses, sheets, films, tubes or fibers are produced by molding the polyester polymer. The polyester polymer has excellent transparency, excellent heat resistance, extremely low optical anisotropy and excellent moldability.

Abstract: A polyester container made from a polymer having ethylene glycol moieties, isosorbide moieties and terepthaloyl moieties, and the method of making the container is described. The polyester container is suitable for holding liquids and solids, and may be hot-filled or cold-filled. In particular, wide-mouth jars and narrow-necked bottles may be formed. The polyester has an inherent viscosity of at least 0.35 dL/g when measured as a 1% (weight/volume) solution of the polyester in o-chlorophenol at a temperature of 25.degree. C.

Abstract: A process for preparing cocondensates of aspartic acid and amines by heating aspartic acid and amines in the presence of acidic catalysts comprises supplying the feed region of the extruder with particulate aspartic acid and a downstream metering zone with at least one amine and at least one acidic catalyst, condensing the resulting mixture to such an extent by heating that the downstream end of the extruder discharges a precondensate which contains at least 20-95% by weight of the starting aspartic acid in condensed form, and then completing the condensation of the precondensate. The cocondensates are useful as incrustation inhibitors in detergents.

Abstract: A polyester fiber made from a polymer having ethylene glycol moieties, isosorbide moieties and terepthaloyl moieties, and the method of making the fiber is described. The polyester fiber is used to form articles suitable for commercial, especially textile, and industrial uses, and has an inherent viscosity of at least 0.35 dL/g when measured as a 1% (weight/volume) solution of the polyester in o-chlorophenol at a temperature of 25.degree. C.

Abstract: A process for the preparation of an unsaturated polyester which comprises (i) reacting an organic diol with a cyclic akylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, and (ii) optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and (iii) subsequently polycondensing the resulting mixture with a dicarboxylic acid.

Abstract: A polymer system having repeating units of the formula: ##STR1## wherein A is --H or --OH, x has a value of 0.5 to 1.0 and y has a value of 1.0-x, exhibits a high glass transition temperature (T.sub.g) and a low dielectric constant. The polymer system is useful in the area of microelectronic packaging.

Abstract: A polyester having increased UV absorption comprising (i) a residue of a dicarboxylic acid component comprising terephthalic and from about 1 to about 20 mole % of isophthalic acid, (ii) a residue of a glycol component comprising ethylene glycol, and (iii) from about 0.01 mole % to about 15 mole % of a residue of an aromatic diol derivative, wherein the aromatic diol derivative has a least two polyester reactive groups that are capable of participating in a polyester-forming reaction and the total mole % for components (i), (ii) and (iii) is 200 mole %.

Abstract: Biodegradable resin products consisting essentially of a polymeric resin of polyethylene, starch, polyesters such as polylactic acid, or other suitable polyesters. In admixture with the resin is a particulate vapor phase corrosion inhibitor selected from amine salts, ammonium benzoate, triazole derivatives, tall oil imidazolines, alkali metal molybdates, alkali dibasic acid salts, and mixtures thereof, and is present in an amount ranging from between about 1% and 3% by weight of the polymeric resin.

Abstract: A thermotropic liquid crystalline polymer constituted of repeat units derived from hydroquinone, terephthalic acid, isophthalic acid, 2,6-naphthalene dicarboxylic acid, and 4-hydroxybenzoic acid, all present in defined amounts. Such polymer has excellent physical properties and high temperature stability. It is suitable as a molding resin.

Abstract: Disclosed is a process which comprises reacting a polymer of the general formula ##STR1## or ##STR2## wherein x is an integer of 0 or 1, A is one of several specified groups, such as ##STR3## B is one of several specified groups, such as or mixtures thereof, and n is an integer representing the number of repeating monomer units, with a halomethylethyl ether, a hydrohalic acid, and acetic acid in the presence of a halogen-containing Lewis acid catalyst, thereby forming a halomethylated polymer.

Abstract: A phenol and a ketone are reacted to form bisphenol, and the liquid bisphenol obtained or a mixed solution of said solution and a phenol is filtered through a calcined metal filter to obtain bisphenol which makes it possible to efficiently obtain bisphenol which either does not contain fine particulate impurities or contains such impurities only in minute amounts, and a method for manufacturing polycarbonate using bisphenol obtained by this method. The filtration grade of the calcined metal filter should be 1.0 .mu.m or less. After filtering, the calcined metal filter can be backwashed or chemically washed and then reused. The bisphenol should preferably be bisphenol A.

Abstract: There are provided liquid crystalline polyesters comprising 4'-hydroxy-4-stilbenecarboxylic acid type units, dicarboxylic acid units acting as a mesogen such as 4,4'-stilbenecarboxylic acid and catechol units as essential ingredients, and a liquid crystalline polyester composition comprising said polyesters and optically active liquid crystalline polyesters consisting essentially of 4,4'-stilbenedicarboxylic acid type units and aliphatic diol units having asymmetric carbons.

Abstract: A branched alkenyl functional polyester of a prepolymer having at least one carboxyl and at least three hydroxyl groups, which is made allylfunctional by reaction between at least one of said hydroxyl groups in the prepolymer and at least one monomeric or polymeric compound having at least one allylic unsaturation. The prepolymer is a condensation product obtained by condensing at least one monomer selected from the group consisting of di, tri or polyhydroxyfunctional monocarboxylic acids having 2-18 carbon atoms optionally followed by further chain extension by addition of at least one monohydroxyfunctional monocarboxylic acid or corresponding lactone having 2-24 carbon atoms.

Abstract: Thermomechanical and thermo-oxidative stabilities in resin composites across the range of aerospace "engineering thermoplastic" resins are improved by forming four crosslinks at each addition polymerization site in the backbone of the resin using crosslinking functionalities of the general formula: ##STR1## wherein Z= ##STR2## .beta.=the residue an organic radical selected from the group consisting of: ##STR3## R.sub.R =a divalent organic radical; X=halogen;Me=methylT=allyl or methallyl.G=--CH.sub.2 --,--S--, --CO--, --SO--, --O--, --CHR.sub.3 --, or --C(R.sub.3).sub.2 --;i=1 or 2;R.sub.3 =hydrogen, lower alkyl, lower alkoxy, aryl, or aryloxy; and.theta.=--C.tbd.N, --O--C.tbd.N, --S--C.tbd.N, or --CR.sub.3 .dbd.C(R.sub.3).sub.

Abstract: Disclosed is a select class of liquid crystalline polyesters and molding compositions comprising the polyesters and glass fiber. The liquid crystalline polyesters consist essentially of (1) diacid residues consisting essentially of (i) cyclohexanedicarboxylic acid residues and (ii) other diacid residues selected from terephthalic acid residues, 2,6-naphthalene-dicarboxylic acid residues, or a mixture thereof; (2) diol residues consisting essentially of hydroquinone residues, 4,4'-biphenol residues or a mixture thereof; and, optionally, (3) p-hydroxybenzoic acid residues. In the above definition, the moles of diol residues are equal to the moles of diacid residues and the total of the (1), (2) and (3) mole percentages is equal to 100. The liquid crystalline polyesters have melting points determined by differential scanning calorimetry equal to or less than 360.degree. C.

Abstract: A process for the preparation of an esterification product comprises reacting a polyfunctional organic acid or anhydride and a cyclic organic carbonate compound in the presence of a catalyst to form an esterification product. The catalyst comprises a quaternary ammonium salt and a component selected from the group consisting of a metal, a salt of a metal, and mixtures thereof.

Abstract: A polyester film made from a polymer having ethylene glycol moieties, isosorbide moieties and terepthaloyl moieties, and the method of making the film is described. The polyester film is used to form articles such as films, lacquers, labels, capacitors, insulators, and the like, and has an inherent viscosity of at least 0.35 dL/g when measured as a 1% (weight/volume) solution of the polyester in o-chlorophenol at a temperature of 25.degree. C.

Abstract: There is provided a cord of twisted polybenzazole fibers, which has a tenacity of 35 g/d or higher and an elastic modulus of 800 g/d or higher. The cord has not only remarkably improved fatigue resistance but also excellent mechanical characteristics at a high level that has not been achieved so far. Therefore, it can attain the weight reduction of composite materials, particularly in the field of reinforced rubber materials, and can also make a great contribution to the energy saving.

Abstract: A melt processable poly(ester-amide) which is capable of forming an anisotropic melt phase is provided. A poly(ester-amide) of the present invention may have recurring units of: (a) 4-hydroxybenzoyl moiety, (b) 6-oxy-2-naphthoyl moiety, (c) 4,4'-biphenol moiety, (d) terephthaloyl moiety, and (e) an aromatic moiety capable of forming an amide linkage in the proportions indicated. Preferably, the moiety capable of forming an amide linkage is derived from p-aminophenol, p-phenylenediamine, N-acetyl-p-aminophenol, etc. The resulting poly(ester-amide) is capable of undergoing melt-processing in the temperature range of from about 300.degree. to about 400.degree. C.

Abstract: A resin for coating formation which comprises a polyarylate comprising 2,2-bis(3-methyl-4-hydroxyphenyl)propane units and a divalent carboxylic acid component comprising 10 to 90 mol % of terephthalic acid units and 90 to 10 mol % of isophthalic acid units, having an inherent viscosity measured in 1,1,2,2-tetrachloroethane at a concentration of 1 g/dl at 25.degree. C. of 0.85 or more, and having a carboxyl value of 20 mol/ton or less. Also disclosed is a process for producing the resin by interfacial polymerization, using a quaternary ammonium salt or a quaternary phosphonium salt having at least 3 alkyl groups each having at least 3 carbon atoms as a catalyst.

Abstract: The present invention relates to a process for preparing a dispersion of high grade polyester copolymer resin in water comprising 1) combining a crude polyester copolymer resin, having particles of various sizes, with water; 2) heating and agitating the resin/water mixture; 3) cooling the mixture; 4) continuously filtering the mixture to remove the largest size resin particles; 5) allowing the mixture to stand undisturbed so that any undispersed particles settle out as a sediment; and 6) removing the sediment, leaving a dispersion of the smallest resin particles in water. By using a plurality of filters and sequentially finer filter mesh sizes, a high grade product is attained.

Abstract: Woven or laid structures comprising at least two systems of parallel threads, at least one of these thread systems having more than 10 threads per centimeter and comprising at least 10%, based on the thread system, of hybrid yarns comprising reinforcing filaments and lower melting matrix filaments composed of thermoplastic polymers. In such woven or laid structures, the matrix component can be melted to form textile sheet materials of adjustable gas and/or liquid permeability, which are especially useful for manufacturing airbags.

Abstract: An improved process and apparatus for the production of a polyester or other condensation polymer is disclosed. In particular, polymerization is conducted in a reaction vessel equipped with a specially designed agitator that exposes the polymer melt partially filling the reaction vessel to inert gas flowing through the vessel. The agitator comprises a plurality of elements that lift a portion of a polymer melt in the reaction vessel and generate films of the polymer melt which films extends in planes that are parallel to the axis of the agitator and the flow of gas through the reaction vessel. In a preferred process, a melt of bis(2-hydroxyethyl) terephthalate, or its low molecular oligomers, obtained by esterifying terephthalic acid or transesterifying dimethyl terephthalate with ethylene glycol, is contacted with an inert gas at about atmospheric pressure in order to remove the reaction by-products and facilitate polymerization.

Abstract: Optically active poly(aryl)ether polymers prepared from monomers containing optically pure spirobiindane and/or indane moieties are disclosed. The chiral poly(aryl)ether polymers are of high molecular weight and exhibit high optical rotations. In addition, the polyethers are thermally stable at high temperatures and exhibit excellent hydrolytic resistance making them useful in high temperature processing applications, in the fabrication of optoelectronics devices, and as polarizing coatings and filters.

Abstract: A polyester composition has a number average molecular weight M.sub.n of between about 500 and about 1000, a weight average molecular weight M.sub.w of between about 600 and about 2000, a polydispersity below about 2, preferably below about 1.8, hydroxyl functionality between 2 and 3, a hydroxyl value of between about 160 and about 260, and an acid number below about 10. Less than about 5% of the OH groups of the polyester are pendent, the rest being terminal. Between about 10 and about 50 wt % of the monomers used to form the polyester composition are anhydrides having the formula: ##STR1## where R.sup.1 is a non-aromatic, saturated or unsaturated hydrocarbon chain having between 6 and 30 carbon atoms, R.sup.2 is hydrogen or a non-aromatic saturated or unsaturated hydrocarbon having between 1 and 8 carbon atoms, and R.sup.1 and R.sup.2 have, in total, between 8 and 30 carbon atoms. The polyester in conjunction with a hydroxyl-reactive curative provides a coating composition.

Abstract: A polyethylene-2,6-naphthalene dicarboxylate resin for molding a bottle, which comprises 2,6-naphthalenedicarboxylic acid as a main acid component and ethylene glycol as a main glycol component and contains a germanium compound as a polycondensation catalyst, and has an intrinsic viscosity of 0.55 to 0.75 dl/g, a terminal carboxyl group content of 32 eq/ton or less, an acetaldehyde content of 8 ppm or less and a diethylene glycol component content of 0.8 to 3.0 wt %.

Abstract: Polyetherimide polymers prepared from monomers containing indane moieties are disclosed. The high molecular weight indane polyetherimides are transparent, ductile, and exhibit high glass transition temperatures (>200.degree. C.). In addition, the polyetherimides are thermally stable at high temperatures and exhibit good optical properties making them useful in high temperature processing applications, in the fabrication of optoelectronics devices, and in optical applications.

Abstract: Liquid crystalline polymers that are made from 4-hydroxybenzoic acid, 2,6-naphthalenedicarboxylic acid, terephthalic acid, hydroquinone, and N-acetyl-4-aminophenol by heating the monomers in the presence of acetic anhydride are more easily synthesized in high molecular weight if isophthalic acid is also included as a monomer at a level of about 0.5 mole % to about 10 mole %.

Abstract: A process for the preparation of polycarbonate copolyether diols comprising two successive reaction stages wherein in the first stage the precursor, bisdimethylcarbonate of polyether diols is synthesized by reacting, in a reactor equipped with a distillation column, one or more polyetherglycols with dimethyl carbonate, in the presence of a basic catalyst selected from the group consisting of an oxide, a hydroxide, a carbonate and an alcoholate of a metal belonging to the group of alkaline or earth-alkaline metals and in the second stage, the precursor, after being freed from the catalyst and excess dimethylcarbonate, is converted to polycarbonate copolyether diols by transesterification reaction with polyetherglycols in the presence of a solvent and an organometallic catalyst selected from compounds of tin, lead, titanium, zirconium and antimonium, said polycarbonate polyether diols having utility as additives in the field of polyurethane end-products, thermoelastomers, paints and adhesives.

Abstract: Optically active polycarbonate, polyester, and polyurethane polymers prepared from monomers containing optically pure indane moieties are disclosed. The chiral indane polymers are of high molecular weight and exhibit high optical rotations. In addition, the optically active polymers are useful in the fabrication of optoelectronics devices and as polarizing coatings or filters or as polarized lenses.

Abstract: Materials of formula (I) are provided, wherein X.sub.1 -X.sub.5 are independently selected from H, F, Cl, NO.sub.2, CF.sub.3, OR, R, SR, .paren open-st.CO-- or .paren open-st.CO-- where R is C.sub.1-15 branched or straight chain alkyl; provided that one of X.sub.1 -X.sub.5 is selected from .paren open-st.CO-- or .paren open-st.OC--; p is at least 2; W=single bond, phenyl, fluorinated phenyl, .dbd., .tbd., cyclohexyl, thiophene, CO, OC; T.sub.1, T.sub.2, T.sub.3, T.sub.4 are independently selected from H, F, Cl, NO.sub.2, CF.sub.3, OR, R, SR, where R is C.sub.1-15 branched or straight chain alkyl; g=0 or 1; X is selected from CO.sub.2 and OOC; n is selected from 1-5; m is selected from 1-20, Y is selected from O, S, CH.sub.2, CO.sub.2, OOC; Q is CH.sub.2 and when m is greater than 1 then non-adjacent CH.sub.

Abstract: Chiral nematic polyesters comprise as alcohol component chiral diol structural units and as acid component dicarboxylic acid residues comprising mesogenic groups. The polyesters are particularly suitable for surface coating.

Abstract: Disclosed are copolycarbonate compositions comprising structural units of Formula I ##STR1## Formula II ##STR2## wherein R.sup.2 represents --CH.sub.3, --C.sub.2 H.sub.5, or propyl; A is a divalent organic moiety; and wherein the ratio of Formula I to Formula II in the copolycarbonate is from about 99.8:0.2 to about 90:10.

Abstract: Disclosed is a process which comprises reacting a haloalkylated aromatic polymer with a material selected from the group consisting of unsaturated ester salts, alkoxide salts, alkylcarboxylate salts, and mixtures thereof, thereby forming a curable polymer having functional groups corresponding to the selected salt. Another embodiment of the present invention is directed to a process for preparing an ink jet printhead with the curable polymer thus prepared.

Abstract: Liquid-crystalline polymer blends comprising two or more cholesteric liquid-crystalline polymers or at least one nematic liquid-crystalline polymer and at least one cholesteric liquid-crystalline polymer.All hues can be produced specifically and in a reproducible manner by variation in the blend components and in the mixing ratio. The polymer blends are suitable as materials or as effect pigments.

Abstract: Modified polyaspartic acids useful as detergent and cleaner additives, as water treatment agents and as scale inhibitors in the evaporation of sugar juice are obtainable by polycondensation of(a) from 1 to 99.9 mol % of aspartic acid with(b) from 99 to 0.1 mol % of fatty acids, polybasic carboxylic acids, anhydrides of polybasic carboxylic acids, polybasic hydroxycarboxylic acids, monobasic polyhydroxycarboxylic acids, alcohols, amines, alkoxylated alcohols and amines, amino sugars, carbohydrates, sugarcarboxylic acids and/or non-proteinogenic aminocarboxylic acidsor by polymerizing monoethylenically unsaturated monomers in the presence of polyaspartic acids in the manner of a free-radically initiated graft polymerization.

Abstract: Disclosed is a process which comprises reacting a polymer of the general formula ##STR1## wherein x is an integer of 0 or 1, A is one of several specified groups, such as ##STR2## B is one of several specified groups, such as ##STR3## or mixtures thereof, and n is an integer representing the number of repeating monomer units, with an acetyl halide and dimethoxymethane in the presence of a halogen-containing Lewis acid catalyst and methanol, thereby forming a haloalkylated polymer. In a specific embodiment, the haloalkylated polymer is then reacted further to replace at least some of the haloalkyl groups with photosensitivity-imparting groups. Also disclosed is a process for preparing a thermal ink jet printhead with the aforementioned polymer.

Abstract: Papermaking machine fabrics, filters and reinforcing layers for elastomers, comprise monofilaments of copolymers containing 85 to 99 mol % of the structural repeat unit of the formula I ##STR1## 1 to 15 mol % of the structural repeat unit of the formula II--OC--R.sup.2 --CO--O--R.sup.3 --O-- (II),whereR.sup.1 is a radical of a dihydric aliphatic or cycloaliphatic alcohol or is derived from mixtures of such alcohols,R.sup.2 is a radical of an aliphatic, cycloaliphatic or monocyclic aromatic dicarboxylic acid or is derived from mixtures of such dicarboxylic acids,R.sup.3 assumes one of the definitions for R.sup.1, and the quantitative data are based on the total amount of the polymer.

Abstract: A new process is provided for the formation of aromatic polyesters directly from the reaction of dialkyl ester of an aromatic carboxylic acid with dihydric phenols. The polycondensation is carried out in the presence of (a) a condensing agent; (b) a catalyst selected from the group consisting of derivatives of Group I metals, derivatives of Group IV A metals, derivatives of Group IV B metals, and mixtures thereof; and (c) a co-catalyst selected from the group consisting of methanesulfonic acid, sulfuric acid, p-toluenesulfonic acid, alkanoic acid having the formula, C.sub.n H.sub.x F.sub.y COOH, where n is an integer from 1 to 4, x and y are integers from 0 to 2n+1, and the sum of x and y is 2n+1, and mixtures thereof; at suitable temperature and pressure conditions and for a sufficient period of time to form the aromatic polyester.

Abstract: A process for preparing an esterification product is disclosed. The process comprises providing a polyfunctional organic acid or anhydride, a cyclic organic carbonate compound, and a catalyst selected from the group consisting of an alkali metal, an alcohol-derived salt of the alkali metal, and mixtures thereof, and reacting the polyfunctional organic acid or anhydride and the cyclic organic carbonate compound in the presence of the catalyst to form the esterification product.

Abstract: Liquid crystalline polyesters made from hydroquinone, terephthalic acid, 2,6-naphthalene dicarboxylic acid and 4-hydroxybenzoic acid, and having a selected composition range, have melting points of about 350.degree. C. or less, good physical properties, and are readily manufactured. The polymers are useful as molding resins.

Abstract: Poly(ester-imides) containing t-butylhydroquinone and trimellitic anhydride as part of the repeat units, as well as other monomers, are useful as molding resins. The polymers have a high glass transition temperature and are particularly useful in applications requiring good wear resistance.

Abstract: A process for treating a liquid crystal polymer film which includes the steps of: heating a film obtained by extrusion molding of a liquid crystal polymer, while contacting at least one surface of the film with a supporting body, to melt the polymer; cooling the melted polymer to form a solidified polymer layer; and separating the solidified polymer layer from the supporting body. The process readily provides liquid crystal polymer films having excellent resistance to intra-layer delamination and high tensile strength and elongation, as well as excellent resistance to abrasion, dimensional stability when heated, and resistance to folding.

Abstract: A process for the production of a terminal-blocked aromatic polycarbonate by melt-polycondensing an aromatic dihydroxy compound and diphenylcarbonate, the process comprising adding a specific carbonate or carboxylic ester after a polycarbonate formed has an intrinsic viscosity of at least 0.3 dl/g, to form a terminal-blocked polycarbonate having an intrinsic viscosity which is greater than, or smaller than, the intrinsic viscosity of the polycarbonate formed before the addition by 0.1 dl/g at the most; and a process for the production of a polycarbonate having an increased intrinsic viscosity by melt-polycondensing an aromatic dihydroxy compound and diphenylcarbonate, the process comprising adding a specific diaryl carbonate or dicarboxylic diaryl ester after a polycarbonate formed has an intrinsic viscosity of at least 0.3 dl/g, to form a polycarbonate having an intrinsic viscosity greater than the intrinsic viscosity of the polycarbonate formed before the addition by more than 0.1 dl/g.

Abstract: Disclosed herein are thermotropic liquid crystalline poly(ester-amides) containing repeat units derived from alipatic diamines and other monomers, such as aromatic diols, aromatic dicarboxylic acids, aromatic hydroxycarboxylic acids, and optionally aliphatic diols. The polymers are particularly useful as films and in multilayer structures as barrier layers because of their relatively low permeability to various compounds.

Abstract: The invention provides polyesters of terephthalic acid units and ethylene glycol units, having excellent melt moldability. The invention also provides molded articles having excellent transparency, impact resistance, gelation characteristics, appearance, tactility, mechanical properties, heat resistance, chemical resistance, and dimensional precision.