Montedison S.p.a.

Himont Italia S.r.l.

Ausimont Usa, Inc.

L Lawrence Chapoy

Alfredo Coassolo

Marco Foa'

Marco Foa

Francesco Casagrande

Giampiero Sabarino

Andrea Gardano

Umberto Giannini

Raffaele Ungarelli

Loris Sogli

Giuseppe Motroni

Mauro Maritano

Chii-Shu Chen

Giorgio Gabrielli

Carlo Federici

A composition comprising a halopolymer, such as an ethylene/chlorotrifluoroethylene copolymer, an effective stabilizing amount of an ionomer, and an effective stabilizing amount of a compound such as a phosphite of an organic polyhydric phenol; a thioester; a phosphite; or a hindered phenolic antioxidant. Preferred ionomers are metal salts of ethylene-acrylic acid copolymers, and metal salts of sulfonated polystyrenes. The stabilized halopolymers have improved resistance to thermal degradation and suffer less discoloration when subjected to high melt processing or extrusion molding temperatures.

Stabilization of halopolymers with ionomers

Cross-linkable thermotropic liquid crystalline aromatic polyesters comprising at least one unit derived from an aromatic diol substituted with at least one allyl group, in combination with units derived from dioxyaryl and dicarboxyaryl monomers.

Cross-linkable thermotropic liquid crystalline aromatic polyester

Process for the alkylation of phenols comprising reacting a phenol with a vinyl-aromatic hydrocarbon in the presence of an acidic catalyst and of a solvent.

Process for the alkylation of phenols

Melt-formable thermotropic liquid crystalline polymers containing groups derived from terephthalic acid and a mixture of phenyl hydroquinone, 2-(.alpha.-phenylisopropyl) hydroquinone and, if desired, 2,5 bis (.alpha.-phenylisopropyl) hydroquinone.

Thermotropic liquid crystalline polymers

Thermotropic liquid-crystalline aromatic polyesters processable in the molten state, comprising units derived from at least one dicarboxy aromatic acid having the formula:

Thermotropic liquid-crystalline aromatic, polyesters

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

Liquid-crystalline, thermotropic aromatic polyesters

Thermotropic liquid-crystalline aromatic polyesters processable in the molten state, comprising units derived from at least one dicarboxylic aromatic acid and from mono- and di-substituted (1-phenyl-ethyl)-hydroquinones in admixture with hydroquinone, and/or hydroquinones substituted with halogen or alky, aryl or cycloalkyl groups.

Termotropic liquid-crystalline aromatic polyester from

Thermotropic liquid crystalline aromatic polyesters of 3,3'-diphenyl-4,4'-dihydroxydyphenyl containing units derived from mono-substituted hydroquinones in amounts over 10% by moles with respect to the total of the aromatic diols.

Thermotropic liquid crystalline aromatic polyester from 3,3'-diphenyl-4,4'-

Liquid-crystalline, thermotropic, aromatic polyesters processable in the molten state, comprising units derived from hydroquinones substituted with aryl, aralkyl and aroyl groups, and from phenoxy-hydroquinone.

Liquid-crystalline, thermotropic aromatic polyester from hydroquinone

Thermotropic liquid crystalline polyesters which can be processed in the molten state containing moieties derived from a dicarboxylic aromatic acid and 2,5-dihydroxybenzophenone eventually in a mixture with a substituted hydroquinones.

Thermotropic liquid crystalline polyester from 2,5-dihydroxybenzophenone

Thermotropic liquid-crystalline aromatic polyesters of 4,4'-dihydroxy-diphenyl substituted with a halogen or with an alkyl, cycloalkyl, aryl, aralkyl, keto or ether radical.

Thermotropic liquid-crystalline aromatic polyesters of substituted

Thermotropic semiflexible polyesters are taught which are obtained by polycondensation of 4,4'-dihydroxybicyclohexyl with at least one .alpha.,.omega.- alkandioic acid of general formula:

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Lesa, Italy

L Lawrence Chapoy