Sandoz Gmbh

Clariant Finance (bvi) Limited

Lenzing Aktiengeselleschaft

Rainer Wolf

Claudine Mauric

Klaus H Stoll

Horst Mayerhoefer

Karl Bechtold

Erwin Hess

Lajos Avar

Tibor Robinson

Wolfgang H Mueller

Peter Staniek

Hartmut Ruf

Gilbert Ligner

Urs Sollberger

Andreas Thuermer

Jean-Paul Kehrli

Rudolf Bill

The invention relates to a stabilizer composition comprising at least one processing stabilizer selected from special phosphite, mono- and diphosphonite compounds, at least one acid scavenger selected from the group consisting of selected metal stearates, hydrotalcites, oxides, hydroxides of alkaline earth metals, at least one UV stabilizer selected from compounds containing at least one 2,2,6,6-tetraalkylpiperidinyl-group and optionally at least one sterically hindered phenolic antioxidant. A further subject matter of the invention is a solid masterbatch composition or a liquid concentrate comprising above-mentioned stabilizer composition. The invention relates also to a process for stabilizing polymeric materials selected from the group consisting of special polyolefins comprising adding to the polymeric material a stabilizing quantity of said stabilizing composition. The invention comprises also a stabilized polymeric material comprising said stabilizing composition and the above-mentioned polymeric material.

Stabilizer composition

Regenerated cellulose incorporating phosphorus compounds so as to be

A homogeneous blended additive useful as a processing stabilizer for polymers which is a blend of Component (a), a defined phosphite or phosphonite; and Component (b) which is micronized zinc oxide. Component (b) is preferably in an amount of 5 to 10% based on the weight of component (a). This additive composition improves the resistance of phosphites and phosphonites against hydrolysis in the presence of moisture, by providing Component (b) as a hydrolysis stabilizer for Component (a).

Processing stabilizer composition

A composition, suitable for stabilizing a polymeric composition against the effects of light, comprising

Mixtures of HALS compounds

New powder coatings or powder coating compositions comprising A) a binder system B) specific powder coating additives C) at least one compound of formula I ##STR1## in which R.sub.1 is methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl or tert-butyl and optionally D) additional compounds selected from the group consisting of antioxidants, UV-stabilizers, UV-absorbers, acid scavengers, radical scavengers, pigments, dyes, UV-quenchers, processing stabilizers, fillers, and tribocharging additives exibit advantages during their production. Compounds according to formula I can be used as UV-absorbers and can be incorporated even in greater amounts and dispersed homogeneously at the manufacture of the powder coating compositions in an extruder. It is a further advantage of these compounds that they do not volatilize during stoving of the coatings.

Powder coating compositions

A composition, having good weatherability properties, comprising

Stabilized polymeric compositions

An aqueous dispersion comprising one or more 2,2,6,6-tetraalkylpiperidine compounds having a molecular weight 2000 or less than 2000 and a melting point of 100.degree. C. or more, one or more cationic, non-ionic and/or anionic dispersing agents and an aqueous medium. These dispersions are suitable for use as light stabilizers in aqueous systems.

Stable aqueous dispersions of tetraalkylpiperidines

A composition, for stabilizing a polymeric material, (hereinafter defined as a stabilizing composition) comprising

Stabilizer compositions comprising a thiophosphate and an organo tin

A process for flameproofing a substrate comprising applying to the substrate a compound of formula I ##STR1## in which R.sub.1.sup..sym. is a N.sup..sym. cation defined in the Specification and R.sub.2 and R.sub.3 are organic radicals. Substrates to which the compound of formula I can be applied include cellulosic substrates.

Flameproofing compounds

Compositions for flameproofing polymeric material comprising:

Flameproofing composition for polypropylene comprising a halogenated

A group of diphosphonic acid tetra-esters and phosphonic or thiophosphonic acid 0,0,0-triesters containing dioxaphosphorinane rings are useful as flame retardants for polymeric organic materials, particularly polyesters. The compounds, some of which are novel, are prepared by reaction of the corresponding phosphites with peroxy compounds or with sulphur.

Flameproofed organic materials

A group of diphosphonic acid tetra-esters and phosphonic or thiophosphonic acid O,O,O-triesters containing dioxaphosphorinane rings are useful as flame retardants for polymeric organic materials, particularly polyesters. The compounds, some of which are novel, are prepared by reaction of the corresponding phosphites with peroxy compounds or with sulphur.

Flameproofed cellulose, especially regenerated cellulose, includes as a flameproofing agent an 0,0,0-triester of phosphoric acid or of thiophosphoric acid.

Flameproofed regenerated cellulose and method

Flameproofed polymeric organic materials, e.g. regenerated cellulose, which include bis-(2-oxo-1,3, 2-dioxaphosphorinanyl) oxides, bis-(2-thiono-1,3,2 -dioxaphosphorinanyl) oxides and 2-oxo-1,3,2-dioxaphosphorinanyl-2'-thiono-1',3',2'-dioxaphosphorinanyl oxides, having at least one substituent on the dioxaphosphorinane rings, as flameproofing agents, and their production. Some of the flameproofing agents are new compounds and are included in the invention.

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Allschwil, Switzerland

Rainer Wolf