Abstract: A process for preparation of a purified bis(2-hydroxyethyl) ester of 2,6-naphthalenedicarboxylic acid wherein 2,6-naphthalenedicarboxylic acid is reacted with a catalyst comprised of a tertiary amine and a titanium-containing compound in order to produce the ester.

Abstract: The present invention provides polyester resins useful for forming containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises about 5 to 50 mole percent of a first diacid selected from 1,4-phenylenedioxy diacetic acid, 1,3-phenylenedioxy diacetic acid, 1,2-phenylenedioxy diacetic acid, and mixtures thereof, and about 50 to about 95 mole percent of naphthalene dicarboxylic acid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: The present invention provides polyester resins useful for forming containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises about 5 to 95 mole percent of a first diacid selected from [thiobis(p-phenyleneoxy)]diacetic acid, [sulfonylbis(p-phenyleneoxy)]diacetic acid, and mixtures thereof, and about 5 to about 95 mole percent of naphthalene dicarboxylic acid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: The present invention provides polyester resins useful for forming containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises about 5 to 50 mole percent of a first diacid selected from 1,4-phenylenedioxy diacetic acid, 1,3-phenylenedioxy diacetic acid, 1,2-phenylenedioxy diacetic acid, and mixtures thereof, and about 50 to about 95 mole percent of terephthalic acid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: Disclosed is a process for the manufacture of high molecular weight polyesters, particularly poly(ethylene terephthalate) (PET) and modified PET, having inherent viscosities (I.V.) for example, above about 0.6, and up to about 1.3 or higher. Such polymers are useful, for example, as structural moldings, self-supporting sheets and films, and blow-molded bottles. The process involves one or more recrystallizations of the polymer incident to solid-state polycondensation, which recrystallizations, it has been discovered, restores the high polycondensation activity of the polymer experienced in the early stages thereof and allows greatly increased overall build-up rate and higher final I.V. for the total polycondensation period. The process is particularly applicable to crystallizable polyesters in general which lend to solid-state build-up.

Abstract: The present invention provides containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises about 5 to 100 mole percent of a first diacid selected from 1,4-phenylenedioxy diacetic acid, 1,3-phenylenedioxy diacetic acid, 1,2-phenylenedioxy diacetic acid, and mixtures thereof, and 0 to about 95 mole percent of terephthalic acid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: The present invention provides containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises about 5 to 60 mole percent of a first diacid selected from [thiobis(p-phenyleneoxy)]diacetic acid, [sulfonylbis(p-phenyleneoxy)]diacetic acid, and mixtures thereof, and about 40 to 95 mole percent of terephthalic acid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.

Abstract: Disclosed are compositions having improved resistance to oxygen and carbon dioxide permeability comprising a copolyester derived from an acid component consisting essentially of 55-99 mol % terephthalic acid, 45-1 mol % of at least one acid of the formula HOOC--(CH.sub.2).sub.n --COOH where n is 1 to 6, and a glycol component, at least 60 mol % of which is ethylene glycol, the copolyester having an I.V. of about 0.1-1.5.

Abstract: Disclosed is a hot-melt adhesive composition comprising a polyester amide of from about 50 to about 85 mole % terephthalic acid, from about 15 to about 50 mole % of an aliphatic dicarboxylic acid having from 4 to 12 carbon atoms, about 60 to about 90 mole % of 1,6-hexanediol, and from about 10 to about 40 mole % 1,6-hexanediamine. The polyester amide has a glass transition temperature of from about -15.degree. to about 15.degree. C., a melting point of about 70.degree. to about 140.degree. C., and is useful as a fabric adhesive.

Abstract: Disclosed is a textile fiber comprised of a poly(oxyethylene)-glycol modified poly(1,4-cyclohexylenedimethylene terephthalate) type polyester containing phosphorus, a stabilizer, an organic titanium compound, and optionally a manganous ion. The fiber exhibits an unobvious combination of commercially acceptable mechanical properties, commercially acceptable lightfastness, commercially acceptable gasfastness, and commercially acceptable dye rate.

Abstract: Disclosed is a polyester textile fiber comprised of an admixture of a polyetherester prepared from terephthalic acid, ethylene glycol and poly(oxyethylene) glycol, cobaltous aluminate, a whitening agent and a critical amount of a stabilizer. The textile fiber exhibits an unobvious Blue-Whiteness/Tenacity Retention Balance Value.

Abstract: Disclosed is a textile fiber comprised of an isophthalic acid modified poly(1,4-cyclohexylenedimethylene terephthalate) type basic dyeable polyester. The fiber exhibits a desirable overall balance of properties and an unobvious combination of high basic dye takeup and low disperse dye take-up.