Montedison S.p.a.

Novamont S.p.a.

Himont Incorporated

Novaol S.r.l.

Giampiero Sabarino

Marco Foa

Alfredo Coassolo

Marco Foa'

L Lawrence Chapoy

Andrea Gardano

Umberto Giannini

Sauro Strologo

Larry L Chapoy

Elena Bencini

Luigi Sacconi

Process for the preparation of carboxylic acids and esters thereof by

New phosphorous organic amides of a specific formula and their use as stabilizers for polymers and, other organic materials.

Phosphorous organic amides suitable as stabilizers and polymer

A method of preparing carboxylic acids or esters thereof by the oxidative cleavage of unsaturated fatty acids or esters thereof is carried out in a two-phase aqueous-organic system in which the organic phase contains the unsaturated fatty acid and/or the esters thereof and the aqueous phase contains hydrogen peroxide. The oxidative cleavage is carried out in the presence of a catalytic system including a catalyst belonging to the group constituted by tungstic and molybdic acids and alkaline salts thereof, and an onium salt which acts as a phase-transfer agent for the catalyst, and has the formula:

Preparing carboxylic acids or esters by oxidative cleavage of

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 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 4,4'-dihydroxydiphenyl substituted in 3,3' positions by a halogen or by an alkyl, cycloalkyl or aralkyl radical.

Thermotropic liquid crystalline aromatic polyesters of disubstituted

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

Polyphenylenethers are prepared by oxidative polymerization of phenols in the presence of oxygen and of organic bases (amines), by using copper-based catalysts having general formula:

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Vercelli, Italy

Giampiero Sabarino