Ciba Specialty Chemicals Corporation

Ciba-geigy Corporation

Basf Se Corporation

Matthew E Gande

Roland A Winter

Raymond R Seltzer

Peter Nesvadba

Samuel Evans

Glen T Cunkle

Volker H Von Ahn

Andrew J Leggio

Hui Chin

Thomas Friend Thompson

Stephen D Pastor

Rudolf Pfaendner

Paul A Odorisio

Hans-Werner Schmidt

Sai Ping Shum

Heinz Herbst

Kurt Hoffmann

Michael Tinkl

Klaus H Stoll

Nils Mohmeyer

Leslie R Gatechair

Anthony David Debellis

Armin Schneider

Ashutosh H Sharma

Per Magnus Kristiansen

Geoffrey W Broadhurst

Ramraj Venkatadri

Disclosed are electret materials with outstanding thermal and charge stability. The electret materials comprise a melt blend of a thermoplastic polymer and one or more compounds selected from the aromatic trisamides. The aromatic trisamides are for example of the formula The melt blends are subjected to an electret treatment, for example a corona treatment. The electret materials are for example nonwoven polyolefin webs and are employed as filter materials, wipes, absorbent materials, filter masks, acoustic materials, printing substrates, measuring devices or contactless switches. The present electret materials may also comprise a further additive selected from the hindered amine light stabilizers and the hydroxyphenylalkylphosphonic esters or monoesters.

Electret materials

Disclosed are electret materials with outstanding thermal and charge stability. The electret materials comprise a melt blend of a thermoplastic polymer and one or more hindered hydroxylamine ester compounds that comprise at least one moiety of the formula I 

The present invention is aimed at a method of providing wettability to polyester fibers or filaments, to woven or nonwoven fabrics made therefrom and to resultant articles of manufacture. The method comprises melt extruding a mixture comprising a polyester and one or more alkyl metal sulfonates where the metal is Na, Li or K and the alkyl is straight or branched chain alkyl of 1 to 24 carbon atoms, or is straight or branched chain alkenyl of 2 to 24 carbon atoms. The alkyl metal sulfonates are present from about 0.1% to about 1.9% by weight based on the weight of the polyester. A post treatment step such as an alkaline treatment step is not included. The melt extrusion mixtures do not include certain additives such as polyoxyalkylene compounds, alkylmonoethonolamide compounds, alkyldiethanolamine compounds and polyetheramide compounds.

Wettable polyester fibers and fabrics

Disclosed are electret materials with outstanding thermal and charge stability. The electret materials comprise a melt blend of a thermoplastic polymer and one or more hindered hydroxylamine ester compounds that comprise at least one moiety of the formula I where R' is a monoacyl or diacyl radical; R-Rare each C-Calkyl; and

Decomposing polymers using NOR-HALS compounds

Selected derivatives of 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine are surprisingly effective as inhibitors to prevent the premature polymerization of acrylic and methacrylic acids, their esters, their amides, vinyl acetate and acrylonitrile in the presence of water. Some of these derivatives are new compounds.

Derivatives of 1-oxyl-4-hydroxy-2,2,6,6-tetramethylpiperidine

Derivatives of 1-oxyl-4-hydroxy-2,2,6,6-tetramethylpiperidine as

Selected derivatives of 1-oxyl-2,2,6,6-tetramethyl-4-aminopiperidine are surprisingly effective as inhibitors to prevent the premature polymerization of acrylic and methacrylic acids, their esters, their amides, vinyl acetate and acrylonitrile in the presence of water.

Derivatives of 1-oxyl-4-amino-2,2,6,6-tetramethylpiperidine as

Ethylenically unsaturated carboxyl monomers, such as acrylic or methacrylic acid or their esters, are protected from premature polymerization during manufacture and storage in the presence or absence of water by the incorporation therein of an effective stabilizing amount of a blend two or more nitroxides. Some of these blends provide synergistic stabilization efficacy much superior to the stabilization results obtained by use of either nitroxide alone.

Polymerization inhibition of acrylates using blends of nitroxides

Ethylenically unsaturated monomers are protected from premature polymerization during manufacture and storage by the incorporation therein of an effective stabilizing amount of a 7-substituted quinone methide compound.

7-substituted quinone methides as inhibitors for unsaturated monomers

The use of nitroxide compounds alone or in combination with aromatic amines, such as substituted phenylenediamines, or phenolic antioxidants provides an effective way to prevent oxidative degradation and gum formation in gasolines, especially unstable coker and pyrolysis gasolines.

Stabilizers for the prevention of gum formation in gasoline

Ethylenically unsaturated monomers are protected from premature polymerization during manufacture and storage by the incorporation therein of an effective stabilizing amount of a 7-aryl quinone methide compound.

Inhibition of unsaturated monomers with 7-aryl quinone methides

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Danbury, CT, United States of America

Matthew E Gande