Abstract: The present invention relates to a stretchable polymer consisting essentially of recurring units derived from para-oxybenzoyl, 6-oxy-2-naphthoyl and meta-oxybenzoyl. The invention also relates to a process for stretching a multilayer laminate comprising the steps of providing a multilayer laminate comprising a layer of a thermoplastic and a layer of the stretchable polymer, and stretching the laminate greater than about 100% elongation at a temperature less than about 200° C.

Abstract: Highly stretchable, anisotropic melt-forming polymers consisting essentially of recurring units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, isophthalic acid, terephthalic acid and hydroquinone are disclosed.

Abstract: A stretchable liquid crystal polymer having recurring units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, at least one aromatic diacid and at least one aromatic diol and/or hydroxyamine component, at least a portion of which is 4,4′-biphenol, and one or more aromatic monomers that provide the polymers with selected 1,3-(meta-) linkages. Stretchable polymers are especially suitable for multilayer laminates and bicomponent fibers.

Abstract: Process for producing highly stretchable, amorphous anisotropic melt-forming polymers having recurring units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, at least one aromatic diacid and at least one aromatic diol and/or hydroxyamine component, at least a portion of which is 4,4′-biphenol, which process comprises incorporating into such polymers recurring units derived from one or more aromatic monomers that provide the polymers with selected meta-linkages wherein each of said recurring units is present in the polymer in specific amounts.

Abstract: Process for producing highly stretchable, amorphous anisotropic melt-forming polymers consisting essentially of recurring units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, an aromatic diacid, at least a portion of which comprises 2,6-naphthalene dicarboxylic acid, and an aromatic diol and/or hydroxyamine component, at least a portion of which is 4,4′-biphenol; which comprises incorporating into such polymers recurring units derived from resorcinol, wherein each of said recurring units is present in the polymer in specified amounts.

Abstract: Process for producing highly stretchable, amorphous anisotropic melt-forming polymers having recurring units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, at least one aromatic diacid and an aromatic diol and/or hydroxyamine component, at least a portion of which is 4,4'-biphenol, which comprises incorporating into such polymers recurring units derived from resorcinol and at least one additional monomer that provides the resulting polymer with selected meta linkages, wherein each of said recurring units is present in the polymer in specified amounts.

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: 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 reducing black specks in anisotropic melt-phase forming liquid crystal polymer which comprises the steps of subjecting a reactor in which an anisotropic melt-forming polymer was formed to successive washes of triethylene glycol, ethylene glycol and at least one water wash, draining the reactor between washes, and drying the reactor after the water wash.

Abstract: A process for producing an anisotropic melt-phase forming polymer involving separate acetylation and polymerization steps, which utilizes controlled vapor phase reflux to reduce reactant loss and assist in maintaining the stoichiometry of the process.

Abstract: Blends of poly(arylene sulfide)s, liquid crystalline polyesters and liquid crystalline poly(esteramide)s exhibit a lower melt viscosity than would be expected based on the melt viscosities of analogous blends of liquid crystalline polyesters and poly(arylene sulfide)s that have the same overall amount of liquid crystalline polymer. The viscosities are reduced over a wide range of compositions. Such blends are useful in the manufacture of electronic components, particularly connectors.

Abstract: Naphthalene substituted in the 2- or .beta.-position with an electron-donating substituent can be acylated with high regioselectivity in the 6-position by using an acylating agent in substantially anhydrous hydrogen fluoride which functions both as catalyst and solvent.

Abstract: This invention provides a process for converting alkyl isobutyrate to alkyl methacrylate via alkyl-hydroperoxy-isobutyrate and alkyl alpha-hydroxyisobutyrate intermediate.An important aspect of the process is the use of a particulate metal oxide substrate in the first step of the process.

Abstract: A process of isomerizing branched aldehydes to ketones is provided which comprises contacting at isomerization conditions a branched aldehyde with a zeolite catalyst of the formula: ##EQU1## wherein M is selected from the group consisting of a mixture of alkali metal cations, especially sodium, and tetraalkylammonium cations, the alkyl groups of which preferably contain 2 to 5 carbon atoms, and x is at least 5. The contacting is conducted at a temperature of from about 200.degree. C. to about 600.degree. C. and at a pressure of from about 20 psig to about 100 psig. The branched aldehyde is contacted in the presence of water in a molar ratio of water-to-aldehyde of up to about 20 to 1.