General Electric Company

Gregory R Chambers

James G Bennett, Jr

John Jeffrey Talley

John B Yates

Sai-Pei Ting

William E Smith

Gary F Smith

Gary Mell Bates

Thermoplastic compositions having improved melt strength comprise a polyphenylene ether polymer and a polyamide. The polyamide is formed from a diamine, a second amine selected from secondary triamines and polyamines, and a dicarbioxylic acid. The second amine is included in an amount sufficient to improve the melt strength of the composition. The compositions are particularly suitable for use in blow molding processes.

PPE/polyamide compositions of improved melt strength

In accordance with the invention, there are provided thermoplastic compositions comprising an admixture of:

Compatibilized compositions of polyphenylene ether, polyester resins and

Polyphenylene ether-polyamide compositions compatibilized with polyfunctional compounds such as aliphatic polycarboxylic acids can achieve improved impact strength and ductility by producing an intermediate polyphenylene ether-polyamide product containing at least some nylon 6,6 and thereafter further compounding the intermediate product with a second polyamide component containing at least some of a polyamide different from nylon 6,6.

Polyphenylene ether-polyamide compositions and methods for preparation

Catalyst precursor compositions comprising a mixture of magnesium oxide or a source of magnesium oxide and a water insoluble zinc compound are described. The compositions are calcinable to a catalyst that is useful in reactions for the ortho-alkylation of phenols.

Zinc-containing ortho-alkylation catalyst precursor and catalyst, and

Thermoplastic compositions comprised of compatible combinations of a polyphenylene ether resin and a polyamide resin and which require improved thermal properties can be impact modified with a modifying agent having a core-shell structure comprised of a crosslinked acrylate core and a crosslinked styrenic shell.

Impact modified polyphenylene ether-polyamide compositions

Hydroxyaromatic compounds such as phenol are alkylated with alkanols such as methanol in the presence of a catalyst comprising magnesium oxide with up to about 0.1% by weight of copper deposited thereon in a layer of submicroscopic thickness. The catalyst is prepared by preparing a slurry of a substantially water-insoluble magnesium reagent such as magnesium hydroxide or magnesium carbonate in an aqueous solution of at least one copper salt, removing and drying the solid phase, and calcining the same at a temperature within the range of about 350.degree.-550.degree. C. The catalyst promotes ortho-alkylation of the hydroxyaromatic compound in high yield, minimizes decomposition of the alkanol, and has long life.

Catalyst and method for ortho-alkylation of hydroxyaromatic compounds

Hydroxyaromatic compounds such as phenol are alkylated with alkanols such as methanol in the presence of a catalyst comprising an intimate blend of magnesium oxide and copper, the latter being present in an amount up to about 2% by weight, based on said magnesium oxide. The catalyst is prepared by blending a magnesium reagent and copper in elemental or (preferably) chemically combined form and calcining the same at a temperature within the range of about 350.degree.-550.degree. C. The catalyst promotes ortho-alkylation of the hydroxyaromatic compound in high yield, minimizes decomposition of the alkanol, and has long life.

Copper-magnesium catalyst and method for alkylation of hydroxyaromatic

A method is provided for producing o-cresol by simultaneously alkylating phenol with methanol and transalkylating 2,6-xylenol with phenol in the same reactor.

Selective alkylation of phenol to o-cresol

A coproduct continuous dealkylation process is described in which 4-t-butoxy-n-butanol is contacted with acidic silica-alumina catalyst at temperatures in the 160.degree.-200.degree. C. range (reactor wall temperature) in the liquid hourly space velocity regime of 2:0 to 6:0 liter/liter catalyst/hr. to produce in a single reactor a mixture in which the ultimate product of conversion of the 4-t-butoxy-n-butanol is 1,4-butanediol (1,4-diol) and tetrahydrofuran (THF) present in a preselected ratio (mole %) of 1,4-diol to THF ranging from 7:3 to 3:7. The 1,4-diol produced is useful in the preparation of polyesters, e.g. polybutylene terephthalates, and THF is a useful intermediate in the manufacture of certain chemicals and plastics.

Acidic mixed oxide catalytic dealkylation to produce 1,4-butanediol and

A de-alkylation process which comprises contacting a t-alkylether-alkanol, e.g. 4-t-butylether-n-butan-1-ol, with an acidic solid mixed oxide, e.g. silica-alumina, catalyst which results in the formation of alkanediols, e.g. 1,4-butanediol, in the substantial absence of undesirable side reactions, e.g. the formation of tetrahydrofuran. The resulting alkanediols are useful in the preparation of polyesters, e.g. polybutylene terephthalates.

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Delmar, NY, United States of America

Gregory R Chambers