Abstract: A liquid-crystalline polymer which comprises a new copolymer comprised on one constituent for the main chain thereof containing two or more different naphthalene groups and a different constituent, said polymer being capable of forming the anisotropic phase in the molten state and is improved in the mechanical strength.

Abstract: An aromatic polyester of good processability and heat resistance is prepared by charging starting materials in a reaction vessel, carrying out polycondensation reaction in the vessel until the flow temperature of the produced aromatic polyester falls in the temperature range of from 240.degree. C. to a temperature of 20.degree. C. below the reaction temperature and discharging the reaction product from the vessel in the molten state.The aromatic polyester obtained by the present invention can be used molded into various forms such as fiber, film, etc. In addition, compositions comprising this aromatic polyester and glass fibers, mica, talc, silica, potassium titanate, wollastonite, calcium carbonate, quartz, iron oxide, graphite, carbon fibers, etc. can be used in machine parts, electric and electronic parts and automobile parts because of their excellent mechanical properties, electric properties, chemical resistance and oil resistance.

Abstract: Thermotropic liquid-crystalline aromatic polyesters processable in the molten state, comprising units derived from at least one dicarboxy aromatic acid having the formula:HOOC--Ar.sub.1 --O--Ar.sub.2 --COOH (1)wherein Ar.sub.1 and Ar.sub.2 are aromatic radicals from aromatic diols, and, possibly, from other diacids and/or hydroxy acids.

Abstract: The novel polyester of the present invention is melt processable and is capable of forming an anisotropic melt phase. The polyester includes a relatively low concentration of 6-oxy-2-naphthoyl moiety. Other key moieties are 4-oxybenzoyl moiety, terephthaloyl moiety, 1,4-dioxyphenylene moiety, and 4,4'-dioxybiphenyl moiety. The presence of the 1,4-dioxyphenylene moiety in the specified concentration in combination with the other moieties surprisingly has been found to be capable of advantageously lowering the melting temperature of the resulting polyester while making possible the substantial maintenance of a highly attractive heat deflection temperature in molded articles formed from the same. Fibers which exhibit a relatively high modulus also may be formed.

Abstract: Liquid-crystalline, thermotropic, aromatic polyesters processable in the molten state, comprising units derived from hydroquinone mono- and possibly di-substituted with aralkyl groups.

Abstract: The present invention is a class of polymeric membranes formed from aromatic polyarylates derived from dicarboxylic acid chlorides and cardo bisphenols having halo substituents on all portions ortho to the hydroxy functions. These polyarylate membranes exhibit high gas permselectivities and are useful in various gas separation applications.

Abstract: The invention relates to novel polyarylethers which are essentially ketonic and which are based on the dibenzofuran molecule. Such polymers are, surprisingly, amorphous, have high Tg's eg>200.degree. C., and have surprisingly high solvent resistance.

Abstract: Provided is a wholly aromatic polyester superior in melt processability and tenacity which consists essentially of the following structural units (A), (B) and (C) and wherein 0.2 to 40 mole % of the total of said units are of ortho configuration; ##STR1## where Ar.sup.1 and Ar.sup.2 each represent a divalent aromatic hydrocarbon group having 6 to 20 carbon atoms, the hydrogen atoms of said aromatic hydrocarbon group may be substituted with a halogen atom, an alkyl or alkoxy group having 1 to 4 carbon atoms, or phenyl; Z is ##STR2## --O--, or --SO.sub.2 --; m is 0 or 1, at least 60 mole % of Ar.sup.1 being constituted by a group selected from 1,4-phenylene, substituted 1,4-phenylenes, naphthyl and 4,4'-biphenyl.

Abstract: High molecular weight polyarylate polymers comprise alternating moieties derived from an aromatic dicarboxylic acid halide, with moieties derived from a hydroxyaryl-substituted 1,6-diaza [4.4] spirodilactam compound and, optionally, with moieties derived from a di(hydroxyphenyl) compound are prepared by interfacial polymerization in an aqueous-organic medium containing an alcohol.

Abstract: Smooth, thin, dimensionally stable, essentially circular and planar injection-molded disc members, well adapted as substrates for magnetic recording discs, e.g., by providing same with an effective recording amount of a magnetic coating material on at least one of the face surfaces thereof, comprise a radially molecularly oriented thermotropic polymer, desirably having a flow temperature ranging from 200.degree. C. to 350.degree. C. and an inherent viscosity of at least 1 dl g.sup.-1.

Abstract: The new thermotropic polyesters containing recurring structural units corresponding to the following formulae ##STR1## show excellent mechanical properties and good processibility. They may be used in the usual way for the production of moldings, filaments, fibers and films.

Abstract: A melt-processable copolyester comprising:a structural unit (I) of the formula (1), ##STR1## a structural unit (II) of the formula (2),--OC--X--CO-- (2)wherein X is at least one member selected from the group consisting of ##STR2## a structural unit (III) of the formula (3)--O--Y--O-- (3)wherein Y is at least one member selected from the group consisting of ##STR3## and a structural unit (IV) of the formula (4)--O--Z--CO-- (4)wherein Z represents at least one member selected from the group consisting of ##STR4## the ratio of the structural unit (IV) (III) to the structural units [(I)+(II)+(III)+(IV)] in total being 5 to 80 mole%, the structural units [(I)+(II)] being substantially equimolar to the structural unit (III), the ratio of the structural unit (I) to the structural units [(I)+(II)] in total being 10 to 90 mole %, and the copolyester having an inherent viscosity (ln .eta..sub.rel)/C, measured in a concentration of 0.16 g/dl in pentafluorophenol at 60.degree. C., of not less than 0.3 dl/g.

Abstract: A novel polyester resin is provided which exhibits an anisotropic melt phase. The polymer comprises recurring 4-oxybenzoyl units, 6-oxy-2-naphthoyl units, aromatic dicarboxy units, and aromatic diol units as described in appropriate concentrations. The resulting polyester exhibits excellent melt processability in combination with good mechanical properties and a good retention of properties at elevated temperatures.

Abstract: Macrocyclic oligomers, including polycarbonates, polyesters, polyamides, polyimides, polyetherketones and polyethersulfones, are conveniently prepared from various spiro(bis)indane compounds, especially the 6,6'-difunctional 3,3',3'-tetramethylspiro(bis)indanes. The macrocyclic oligomers may be conveniently converted to linear polymers.

Abstract: Novel polyarylate polymers comprise alternating moieties derived from an aromatic dicarboxylic acid halide, with moieties derived from a hydroxyaryl-substituted 1,6-diaza [4.4] spirodilactam compound and, optionally, with moieties derived from a di(hydroxyphenyl) compound. The polyarylate polymers are thermoplastic polymers characterized by relatively high glass transition temperatures.

Abstract: Novel aromatic polyamides high in heat resistance and soluble in various organic solvents are obtained each by reacting 2,2'-bis[4-(4-aminophenoxy)phenyl]-hexafluoropropane or a simple derivative thereof with an aromatic dicarboxylic acid, e.g. isophthalic acid, or its dihalide or diester.

Abstract: A thermotropic copolyester, having a liquid-crystallne mesophase of nematic structure within a desired range of temperatures, contains units derived from:(a) a saturated aliphatic bicarboxy acid;(b) 4,4'-dihydroxy-biphenyl;(c) p-hydroxybenzoic acid; and(d) 2,6-hydroxynaphthoic acid.Such a thermotropic copolyester displays improved characteristics, in particular as regards its extensional modulus and its tensile strength, when is used as a self-reinforced material, or as a reinforcer material for traditional thermoplastic polymers.

Abstract: Polyester resins usefurl for forming containers having improved resistance to gas permeability comprising the reaction product of(A) a dicarboxylic acid corresponding to the structure ##STR1## wherein X is hydrogen or unstubstituted alkyl containing 1-5 carbons and n is an integer in the range of 4 to 10, and(B) a diol selected from the group consisting of ethylene glycol, 1,4-butanediol and 1,4-cyclohexanedimethanol.

Abstract: In a continuous process for the manufacture of aromatic polyesters by polycondensation of mono- or multi-nuclear substituted or unsubstituted diphenols, with halides of aromatic dicarboxylic acids according to the two-phase interface polycondensation process, the first step is to produce continuously a fine pre-emulsion with an organic solvent and from the aqueous phase, consisting of a solution obtained from the diphenols, of an alkaline hydroxide in order to form the diphenates and possibly of a phase transfer catalyst in water or in a mixture of water and of an organic solubilizer. This pre-emulsion is fed in quantities to a dispersion unit jointly with the organo-liquid phase forming the acid chloride solution.

Abstract: Disclosed herein are a copolymerized polyester produced by copolymerizing a dicarboxylic acid component (A) comprising(a) 10 to 90 mol % of isophthalic acid or an ester forming derivative thereof,(b) 10 to 60 mol % of a phenylenedi(oxyacetic acid) represented by the formula [I]: ##STR1## (wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represent a hydrogen atom, an alkyl group having 1 to 6 carbon atom, an alkoxy group having 1 to 6 carbon atom, a phenyl group, a chlorine atom, a bromine atom or a fluorine atom), or an ester forming derivative thereof, and(c) 0 to 45 mol % of a naphthalenedicarboxylic acid or an ester forming derivative thereof, anda diol component (B); and a polyester composition containing the copolymerized polyester.

Abstract: Linear polyethersulfones are prepared by ring-opening of a macrocyclic spirobiindane polyethersulfone oligomer composition. The ring-opening reaction is conducted in the presence of a basic reagent such as an alkali metal bisphenol salt, at a temperature in the range of about 300.degree.-400.degree. C.

Abstract: Provided are novel polycarbonate or polyestercarbonate resins having excellent performances including excellent transparency and thermal resistance, very small warping or deformation caused by water absorption, and the like.

Abstract: Disclosed herein are (1) a film of a liquid crystalline wholly aromatic polyester which is non-oriented and transparent, which film can be prepared by dissolving a liquid crystalline wholly aromatic polyester in a solvent, casting the resulting solution to form a film and volatirizing the solvent from the film as cast and (2) a film of a liquid crystalline wholly aromatic polyester which is oriented and polarizing, which film can be prepared by orienting the above-mentioned non-oriented film by drawing or heating.

Abstract: A polyester resin comprises 35 to 90 mole percent of the unit (I), 0.5 to 20 mole percent of the unit (II), 0.5 to 45 mole percent of the unit (III) and 0.5 to 45 mole percent of the unit (IV), exhibiting the anisotropy in its molten state. It may further comprise 0.5 to 45 mole percent of the unit (V). The composition is here presented, comprising the polyester resin as defined above and up to 95 percent by weight of an inorganic filler.

Abstract: Composite laminated structures comprising a polyarylate film bound to a polyethylene film via an intermediate tie layer are described. The structures are fabricated by coextrusion of three layer blown tubular films with the center layer being present to bond the polyethylene to the polyarylate.

Abstract: Novel thermosetting resin compositions comprise (a) a cyanatoaryl-substituted 1,6-diaza[4.4]spirodilactam having cyanatoaryl-containing substituents on each spiro ring nitrogen atom and (b) at least one additional polymerizable monomer having two substituents with multiple bonds between adjacent atoms. The compositions cure upon application of heat to crosslinked resins having good properties.

Abstract: Thermotropic liquid crystalline aromatic polyesters of 4,4'-dihydroxydiphenyl substituted in 3,3' positions by a halogen or by an alkyl, cycloalkyl or aralkyl radical.

Abstract: A polyester is provided which exhibits an anisotropic melt phase and an advantageous combination of (1) melt processability and (2) excellent heat resistance in articles formed from the same. The polyester consists essentially of p-oxybenzoyl units, 6-oxy-2-naphthoyl units, terephthaloyl units, and metadioxyphenylene units in appropriate concentrations (as described. The aromatic rings of such units optionally may be substituted as discussed.

Abstract: A polyester resin comprises 35 to 90 mole percent of the unit (I), 0.5 to 20 mole percent of the unit (II), 0.5 to 45 mole percent of the unit (III), 0.5 to 45 mole percent of the unit (IV), and 0.5 to 45 mole percent of the unit (V), exhibiting the anisotropy in its molten state. A polyester composition comprises the polyester resin as defined above and up to 95 percent by weight of an inorganic filler.

Abstract: The present invention provides a highly elongated member of substantially uniform cross-sectional configuration which is capable of improved service as a stiffening support in an optical fiber cable. Such elongated member is the product of melt extrusion through an appropriate orifice of a thermotropic liquid crystalline polymer (as described). The resulting elongated member has been found to offer significant advantages when compared to stiffening supports heretofore proposed for use in optical fiber cables.

Abstract: There are disclosed low birefringent polyesters that are useful in optical devices. The polyesters include units having opposite optical anisotropies. By varying the ratio of the units in the copolymer, the birefringence of an article made from the copolymer can be controlled as desired. The polyester is a substantially optically anisotropic polyester having diol repeating units derived from 9,9-bis(4-hydroxyphenyl)fluorene and at least about 40% by weight of the diacid repeating units derived from aliphatic or cycloaliphatic dicarboxylic acids, the remainder of the diacid repeating units being derived from aromatic dicarboxylic acids.

Abstract: A liquid crystal copolyester having a blocked molecular chain terminal comprising a copolyester which exhibits anisotropy in a molten state and has a functional group located at the terminal of its molecular chain and is blocked with a low-molecular compound having at least one aromatic ring and a molecular weight of 350 or less.

Abstract: High molecular weight thermotropic copolyesters and copolyesteramides which can be molded/extruded into a wide variety of useful shaped articles having improved thermomechanical properties are comprised of recurring structural units of the formulae (I), (II), (III) and (IV), wherein ##STR1## in which the symbol A is an oxygen atom or the NH group; the molar ratio of the units (I) relative to the sum of the units (II)+(III) ranges from 0.95 to 1.05;the amount of the units (II) in the mixture of (II)+(III) ranges from 20 to 90 mol % and that of the units (III), on the same basis, ranges from 80 to 10 mol %;the amount of the units (IV), expressed relative to the amount of the units (I), ranges from 25 to 300 mol %; andsaid copolyesters and copolyesteramides have a flow temperature ranging from 200.degree. to 350.degree. C.

Abstract: High molecular weight thermotropic aromatic copolyesteramides which can be molded/extruded into a wide variety of useful shaped articles having improved thermomechanical properties are comprised of recurring structural units of the formulae (I), optionally (II), (III) and (IV), wherein: ##STR1## in which R.sub.1 is a methyl or ethyl radical or a chlorine or bromine atom, with the proviso that the units (I) may be identical or different; ##STR2## the molar ratio of the units (I) relative to the sum of the units (II)+(III) ranges from 0.95 to 1.05;the amount of the units (II) in the mixture of (II)+(III) ranges from 0 to 80 mol % and that of the units (III), on the same basis, ranges from 100 to 20 mol %;the amount of the units (IV), expressed relative to the amount of the units (I), ranges from 5 to 100 mol %; andsaid copolyesteramides have a flow temperature ranging from 200.degree. to 350.degree. C.

Abstract: Colored polyester compositions useful for molding into articles such as food containers, beverage bottles, cured structural plastics and the like comprising molding grade polyester such as a linear, thermoplastic polyester having reacted therewith or copolymerized therein the residue of a 7-amino-2H-1-benzopyran-2-one compound or a 7-amino-2H-1-benzopyran-2-imine compound, said residue absorbing radiation in the range of about 400 to 450 nm and being non-extractable from said polymer and stable under polymer formation and processing conditions.

Abstract: Disclosed are compositions useful for molding into articles such as food containers, beverage bottles, cured structural plastics and the like comprising a polyester such as a linear, thermo-plastic polyester having reacted or copolymerized therein the residue of a 3H-naphtho[2,1-b]pyran-3-one or 3H-naphtho[2,1-b]pyran-3-imine compound. The naphthopyran compounds and residues are stable at the high temperatures at which the polymers are prepared and absorb radiation in the range of 350 to 450 nm.

Abstract: A cholesteric liquid crystal polyester comprising the following structural units (A), (B) and (C): ##STR1## wherein Ar.sup.1 and Ar.sup.2 represent each independently a divalent aromatic hydrocarbon group having 6 to 20 carbon atoms, of which one or more hydrogen atoms may be substituted by one or more halogen atoms, alkyl or alkoxy groups having 1 to 4 carbon atoms, provided that at least 60 mol % of Ar.sup.1 in the polymer is constituted by at least one group selected from 1,4-phenyl group, 2,6-naphthyl group and 4,4'-biphenyl group.

Abstract: Composition useful for molding into articles such as food containers, beverage bottles, cured structural plastics and the like comprising molding grade polyester such as a linear, thermoplastic polyester having reacted therewith or copolymerized therein the residue of a 7-oxy-2H-1-benzopyran-2-one compound or a 7-oxy-2H-1-benzopyran-2-imine compound, said residue absorbing radiation in the range of about 330 to 380 nm and being non-extractable from said polymer and stable under polymer formation and processing conditions.

Abstract: The invention relates to aromatic polyesters containing units with two carbonyl groups and having liquid crystalline properties. The aromatic polyesters are characterized in that the polyesters contain heterocyclic units with two carbonyl groups. Preferably these units are derived from furandicarboxylic acid. The aromatic polyesters show a considerable reduction in melting temperature, rendering the polyester more processable.

Abstract: This invention relates to new aromatic polyesters based on substituted 4,4'-biphenyl dicarboxylic acids and substituted hydroquinones, to a process for their preparation from hydroquinone derivatives and terephthalic acid and to their use for the preparation of molecularly reinforced polymers.

Abstract: A polyester copolymer comprise 20 to 80 percent by mole of hydroxy-benzoic acid units, 1 to 40 percent by mole of naphthalene units and 1 to 40 percent by mole of dihydroxy-diphenylketone units. It is improved in the heat resistance and is specified by exhibiting the anisotropy in the molten state.

Abstract: An improved method of bonding a polymeric composition comprised of a thermotropic liquid crystalline polymer to a substrate is provided. It has been determined that the adhesion of a thermotropic liquid crystalline polymer to a substrate is enhanced if the absolute difference between the surface pH of the substrate to which the polymer is to be bonded and the pH of the polymer itself is at least approximately 1.0 pH unit as measured by the method described herein.

Abstract: Disclosed is an improved process for the preparation of polyketone and poly(ketone-sulfone) polymers by the reaction of at least one dicarboxylic acid with certain aromatic compounds containing at least four benzene residues in the presence of a perfluoroalkylsulfonic acid and (1) an oxide of phosphorus and/or (2) a perhaloalkanoic anhydride.

Abstract: A wholly aromatic polyester consisting essentially of:(a) from 2 to 50 equivalent % of a 3,3'-biphenyldicarboxylic acid residue;(b) from 10 to 40 equivalent % of a dicarboxylic acid residue excluding the residue of 3,3'-bisphenyldicarboxylic acid;(c) from 10 to 52 equivalent % of a dioxy compound residue of the formula: ##STR1## wherein R.sup.2 is a group of the formula ##STR2## wherein R.sup.6 is a C.sub.1 -C.sub.4 alkyl group or a phenyl group and n is 0 or an integer up to 4, ##STR3## wherein X is as defined above, ##STR4## wherein X is as defined above, and/or ##STR5## and (d) from 0 to 80 equivalent % of an oxycarboxylic acid residue of the formula: ##STR6## wherein R.sup.3 is a bivalent aromatic hydrocarbon group or R.sup.4 --X--R.sup.5, wherein R.sup.4, R.sup.5 and X are as defined above, said polyester having a melt viscosity of at least 50 poise as measured at 275.degree. C. at 100 sec.sup.-1.

Abstract: The present invention provides a bis(hydroxyphthalimide) prepared by reacting 4-hydroxyphthalic anhydride and an organic diamine in the presence of an organic solvent under heating. The bis(hydroxyphthalimide) has two intramolecular imide rings and active hydrogens, and is thus polymerizable to form a variety of polycondensation products each having imide rings by condensation. The bis(hydroxyphthalimide) is also reacted with a dicarboxylic acid dihalide to form a polyesterimide, through condensation, which is excellent in transparency and heat resisting property.

Abstract: The preparation of spirobiindane polyarylate compositions having reduced cyclic oligomer formation and glass transition temperature which can be varied depending upon the percent composition of linear diacids and linear dihydric phenols present therein. Spirobiindane polyarylate-polyester copolymers and methods for their preparation are also disclosed.

Abstract: Novel thermoplastic polymer compositions such as aromatic polycarbonates, aromatic copoly(ester carbonate)s, polyarylates, poly(arylene oxide)s, and polyarylether sulfones containing dicyclopentadienyl diradicals and method for manufacture. The modified polymer compositions have improved melt flow properties.

Abstract: A molding material, comprising the following monomer units:(A) 10-80 mole % HO--AR--COOH,(B) 0-40 mole % HOOC--Ar'--COOH,(C) 10-45 mole % HO--Ar"--OH, and(D) 5-45 mole % ##STR1## wherein Ar, Ar', and Ar", independently, are 1,3- or 1,4-phenylene; 1,4-, 1,5-, 2,6- or 2,7-naphthylene or ##STR2## wherein X is --O--, --S--, --SO.sub.2 -- or --CR.sub.2 --, R is H or C.sub.1-4 alkyl, and n is 0 or 1, wherein all monomer unit quantities relate to the sum of components A-D and their sum is 100 mol %, and wherein the molar ratio (B+D):C ranges from about 0.9:1 to 11.1:1.

Abstract: An aromatic polyester consisting of 40-70 mol % of unit I derived from p-hydroxybenzoic acid, 1-8 mol % of unit II derived from m-hydroxybenzoic acid or isophthalic acid, 6-36 mol % of units III and IV derived from terephthalic acid and 2,6-naphthalene dicarboxylic acid, respectively, and 10-40 mol % of unit V derived from a symmetrical dihydroxy compound can be melt molded at a temperature of up to 330.degree. C. into an article having improved mechanical and thermal properties. An aromatic polyesteramide consisting of components I to V and unit VI having an anilino group is also provided. A filled composition is obtained by blending the polyester or polyesteramide with an inorganic filler. A magnetic resin composition is obtained by blending the polyester or polyesteramide with a magnetic powder.

Abstract: Wholly aromatic mesomorphic polyester amide imides which form a liquid-crystalline fiber-forming melt below 320.degree. C. and are composed of(a) from 5 to 35 mole % of repeat units of the formula I and/or II ##STR1## where the Xs is the formulae I and II can be identical or different and each is --O--, --S--, --SO.sub.2 --, --CO--, --CH.sub.2 -- or .dbd.C(CH).sub.3).sub.2 and n is 0 or 1.(b) from 0 to 30 mole % of repeat units of the formulae III and/or IV ##STR2## (c) a molar amount corresponding to the total amount of components a and b of one or more of the repeat units of the formulae V, VI, VII, VIII and IX ##STR3## (d) if desired from 5 to 25 mole % of one or more of the repeat units of the formulae X, XI and XII ##STR4## (e) repeat units of the formula XIII ##STR5## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mole % in each case,the preparation thereof and fibers, films and moldings prepared therefrom.