Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Huels Aktiengesellschaft

Huls Aktiengesellschaft

Klaus Burzin

Martin Bartmann

Roland Feinauer

Wilfried Ribbing

Gernot Horlbeck

Christian Gerth

Hanns-Jorg Bax

Hans Jadamus

Salih Mumcu

Rainer Feldmann

Jorn Ruter

Horst Heuer

Karl-Heinz Magosch

Michael Droescher

Michael Droscher

Joern Rueter

Srinivasan Sridhar

Wolfgang Neugebauer

Werner Otte

Klaus Bevers

A process for the production of a polyphenylene ether by quenching a transition metal catalyzed oxidative coupling reaction of a di-ortho-substituted phenol, and separation of the metal component. The process comprises:

Process for the production of a polyphenylene ether protected from

A thermoplastic resin composition, which comprises (a) from 5 to 85 parts by weight of a melted or remelted preliminary molding compound consisting of from 60 to 98 parts by weight of polyphenylene ethers, 40 to 2 parts by weight of polyoctylenes, from 0.1 to 5 parts by weight of maleic anhydride and from 0.1 to 5 parts by weight of a further acid derivative which has a melting point below 100.degree. C. and which is selected from the group consisting of an unsaturated mono- or dicarboxylic acid having up to 14 carbon atoms, an anhydride thereof, which excludes maleic anhydride, and an ester of mono- or dicarboxylic acid with an alcohol of up to 6 carbon atoms; and (b) from 95 to 15 parts by weight of an aliphatic homopolyamide or a copolyamide containing a preponderant amount of aliphatic monomer units.

Impact-resistant thermoplastic molding compounds based on polyphenylene

The invention relates to a process for purifying polyphenylene oxides obtained by interruption of the copper-amine catalyzed polycondensation of di-ortho-substituted phenols, where in said process the reaction mixture is subjected to a 'reaction-extraction' (i.e., an extraction which is accompanied by reaction) with water or stream, at a temperature of 60.degree. to 150.degree. C. It is particularly advantageous if the starting mixture in the inventive process comprises a solution of the polyphenylene oxide wherein the reaction has been interrupted by water and CO.sub.2, which solution is mixed into a toluene/water mixture; and further if the 'reaction-extraction' is carried out in the presence of an alkanolamine and a stabilizer.

Process for purifying polyphenylene oxides obtained by interruption of

The invention relates to a method for producing a polyphenylene ether, in which the oxidative coupling reaction of a di-ortho-substituted phenol is carried out in a solvent comprised of a chlorinated hydrocarbon, an aromatic solvent, or a mixture of one of these solvents with an alcohol or ketone. The reaction is terminated by removing or using up the oxygen-containing reaction gas, adding hydrazine to the reaction mixture, and filtering out the resulting precipitate. The precipitate may be reused along with a suitable amine, to comprise a catalyst for a subsequent oxidative coupling reaction.

Method of producing a polyphenylene ether protected against molecular

Cyclododec-2-enyl ethers having the formula ##STR1## wherein R is a straight or branched chain C.sub.1-4 alkyl or alkenyl group, have fragrance characteristics similar to patchouli oil, and are attractive compounds for use in the manufacture of fragrance compositions.

Cyclododec-2-enyl ethers in fragrance compositions

Improved molding compositions based on high-molecular polyether ester amides are obtained by heating at 180.degree.-250.degree. C. a melt containing a mixture of

Molding compositions based on high molecular weight polyether ester

Improved molding compositions based on high-molecular polyalkylene terephthalates are obtained by heating at 240.degree.-300.degree. C. a melt containing a mixture of

Molding compositions based on high molecular weight polyalkylene

A process for the production of polyphenylene oxides by the oxidative coupling of a diorthosubstituted phenol of the formula: ##STR1## wherein R and R' are an n-alkyl radical with 1 to about 6 carbon atoms or a phenyl radical in the presence of an oxidizing gas and an activated copper(II)-amine catalyst made of copper(II) salts, secondary aliphatic or cyclic amines having about 4 to 10 carbon atoms, and hydrobromides of the same or different secondary aliphatic or cyclic amines having about 4 to 10 carbon atoms, in a solvent mixture of a C.sub.6 -C.sub.8 aromatic hydrocarbon and a C.sub.1 -C.sub.4 aliphatic alcohol.

Process for the production of polyphenylene oxides

A molding composition having cold impact strength and amenable to thermoplastic processing, comprises

Polybutylene terephthalate molding composition with high cold impact

Molding compositions having high toughness and hot-water resistance, comprise copolyesters based on polybutylene terephthalate and containing as co-component, 5-25 molar percent (based on total diol component) of a linear, long-chain diol. These copolyesters have a viscosity number &lt;120 cc/g.

Molding compositions with high toughness and hot-water resistance

A method for producing high molecular-weight polyphenylene oxides which comprises the oxidative coupling of a diortho-substituted phenol in the presence of a copper-amine complex, and an activator of a polyvalent alcohol, an alkali or alkaline earth hydroxide, and, if necessary, the hydrobromide of a secondary amine.

Method of producing high-molecular weight polyphenylene oxides

A high molecular-weight polyphenylene oxide is produced by the oxidative coupling of a diortho-substituted phenol in the presence of a copper amine complex and an activator of morpholinium bromide and an alkali metal hydroxide or alkaline earth hydroxide.

Method of producing polyphenylene oxides using morpholinium bromide as

Aliphatic ethers of hydroxymethylcyclododecane of the general formula ##STR1## wherein R is a saturated or unsaturated aliphatic hydrocarbon residue of 1-4 carbon atoms, are valuable odoriferous substances possessing a long-lasting, intense woodsy scent with a balsam note of great richness.

Odoriferous aliphatic ethers of hydroxymethylcyclododecane

High molecular weight linear polyesters advantageous for use as hot melt adhesives and powder coating agents, are prepared by a process for preparing a high-molecular weight, linear copolyester by condensing 40-85 molar percent of terephthalic acid optionally in the form of a dialkyl ester, half of which component can optionally be replaced by another dicarboxylic acid also optionally in the dialkyl ester form, and 60-15 molar percent of adipic acid, with an alkanediol of 2-6 carbon atoms in its carbon chain, at an elevated temperature in the presence of a conventional catalyst, in a first condenstation stage which is an interesterification or esterification stage and a second condenstation stage which is a polycondensation stage, whereby a copolyester melt is produce. The process comprises, before or during the first condensation stage, adding 0.005-01 molar percent, based on the total acid component, of a C.sub.6 - aryl or C.sub.7 - alkaryl ester of phosphorous acid or of phosphoric acid to the reaction mixture; and, after termination of the second condensation stage, adding 0.01-0.2 molar percent, based on the total acid component, of hypophosphorous acid to the finished copolyester melt.

High-molecular weight linear polyesters and a process for preparing them

Odorferous 2-alkoxyethyl-cycloalkyl-ethers of the formula ##STR1## wherein R is a saturated or unsaturated aliphatic hydrocarbon residue of 1-3 carbon atoms and

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Marl, Germany

Klaus Burzin