Chemtura Corporation

Si Group, Inc.

Great Lakes Chemical Corporation

Addivant USA LLC

Other

The Secretary of State for Defence in Her Britannic Majesty's Government

Great Lakes Chemical (europe) Gmbh

Addivant Switzerland Gmbh

Chemtura Europe Gmbh

Evaluation Research Agency, Dra

Si Group-switzerland Gmbh

Jonathan S Hill

Maurice Power

Michael E Gelbin

Warren James Ebenezer

Peter R Smith

Hayder Zahalka

Christopher John Rider

Damien Gerard McDonnell

David Lacey

Cyril A Migdal

Joseph F Stieber

Alan W Hall

Jun Dong

Gerard Mulqueen

Paul Stott

Hazel May Farrow

Denis Louis Emile Labbe

Siren Tan

Corrado Callierotti

Xing Zuo

Tracy Anne Derbyshire

Warren J Ebenezer

Christopher Rider

Peter Smith

The present invention relates to stabilising compositions, particularly stabilising compositions which can be used to stabilise insulation or semi-conductive compositions, such as are used for electrically insulating wires and cables. The stabilising composition comprises: a first stabilising component comprising at least one fully hindered phenolic antioxidant; a second stabilising component comprising at least one partially hindered phenolic antioxidant; and a third stabilising component comprising at least one sulphur-containing antioxidant.

Composition

The invention concerns an antidegradant blend for polymers, comprising: a. an antioxidant selected from one or more of: i. a phenolic antioxidant; ii. an organic phosphite antioxidant; and: b. an inorganic antioxidant or reducing agent; wherein the composition is absent any metal carboxylate or buffering agent having the capacity to buffer in aqueous solution at a pH range from 4 to 8.

Antidegradant blend

The present invention relates to a precursor material for an insulation composition, comprising: a crosslinkable graft polymer comprising a polyolefin component and a polyene component; and an antioxidant. The present invention also relates to an insulation composition obtained from the precursor material.

Insulation composition

The present invention is directed to an antidegradant blend, comprising: at least one metal carboxylate; at least one inorganic phosphite; at least one phenolic antioxidant; and at least one organic phosphite antioxidant. As examples, the metal carboxylate may comprise a metal stearate, a metal lactate and/or a metal benzoate while the inorganic phosphite may comprise one or more metal hypophosphites.

There is provided a stabilizing composition for hot melt adhesives, the composition comprising: a first stabilizing component comprising at least one phenolic antioxidant; a second stabilizing component comprising at least one phosphite antioxidant; and a third stabilizing component comprising at least one antioxidant containing a sulphur group having the formula &#x2014;CH2-(S)x-CH2-, wherein x=1 or 2, and wherein neither of the &#x2014;CH2- groups is directly bonded to an aromatic group.

Solid phosphite compositions comprising tris(4-t-alkylphenyl)phosphites and selected hydroxyalkyl amines exhibit surprising performance compared with other phosphite stabilizers in the stabilization of polymers, such as polyolefins and the like, particularly in the prevention of color formation during high temperature processing or when exposed to certain gasses during storage, e.g., 'gas fading'.

Phosphite compositions

Processes for alkylating hydroxyaryl compounds by reacting a hydroxyaryl with at least one olefin of a complex hydrocarbon stream. The complex hydrocarbon stream preferably comprises a fraction of a cracked hydrocarbon feed stream or the reaction products of a dehydrogenation of a paraffinic feedstock. The olefin of the complex hydrocarbon stream is preferably a branched olefin, e.g., isobutylene or isoamylene. The alkylated compositions are suitable for forming liquid phosphite compositions.

Processes for forming alkylated aryl phosphite compositions from complex hydrocarbon streams

A composition comprising a mixture of at least two different alkylaryl phosphites, wherein some alkyl groups have a different number of carbon atoms than other alkyl groups and wherein the mixture is a liquid at ambient conditions.

Liquid phosphite compositions having different alkyl groups

The invention is directed to various alkylaryl phosphite compositions that ideally are suitable for use as secondary antioxidants in polymers. In one aspect, the phosphite composition comprises a tris(monoalkylaryl)phosphite in an amount from 51 to 95 weight percent; and at least one of: a bis(monoalkylaryl)dialkylaryl phosphite; a bis(dialkylaryl)monoalkylaryl phosphite; and a tris(dialkylaryl)phosphite. The inventive phosphite composition is a solid at ambient conditions. The invention also relates to alkylate compositions and processes for forming such alkylate compositions and such phosphite compositions.

Solid alkylaryl phosphite compositions and methods for manufacturing same

A polymer stabilizing composition comprising a sterically hindered phenol and a phosphite that provides low gel content and enhanced resistance to gas-fading. The stabilizer composition is particular useful for stabilizing polyethylene homopolymers and copolymers, such as linear low density polyethylenes produced from metallocene catalyst. The sterically hindered phenol is, for example, selected from the group consisting of 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate, 1,3,5-tris-(3,5-dicyclohexyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-Triazine-2,4,6-(1H,3H,5H)-trione, and 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene.

Polymers with low gel content and enhanced gas-fading

Disclosed herein is a process for the preparation of a mixture of styrenated p-cresol species that is liquid at room temperature and has a viscosity of less than 40,000 cps at 25&#xb0; C., wherein said process affords 2,6-distyrenated p-cresol assaying at 70% minimum by GC area percent, comprising reacting styrene with p-cresol at a molar ratio of 1.85 to 2.1:1, respectively, in the presence of an acid catalyst at elevated temperature, wherein said mixture comprises monostyrenated-p-cresol, distyrenated-p-cresol, and tristyrenated-p-cresol and exhibits an acid number of less than 0.1 mg KOH/gram.

Stabilization of polymers with styrenated-p-cresols

A polymer stabilizing composition comprising a sterically hindered phenol and a phosphite that provides low gel content and enhanced resistance to gas-fading. The stabilizer composition is particular useful for stabilizing polyethylene homopolymers and copolymers, such as linear low density polyethylenes produced from metallocene catalyst. The sterically hindered phenol is selected from the group consisting of 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate, 1,3,5-tris-(3,5-dicyclohexyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate,1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-Triazine-2,4,6-(1H,3H,5H)-trione, and 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene. The phosphite preferably is a liquid phosphite composition comprising two or more alkylated aryl phosphites.

A composition at least two different phosphites, one of which is derived from an alkylated cresol, wherein the composition is a liquid at ambient conditions. The other phosphites may be derived from alkylated cresol, alkylated phenol or other alkylated hydroxyaryl compounds. The cresol may be mono-alkylated or di-alkylated with a C-Calkyl group.

Liquid phosphite composition derived from cresols

A composition comprising at least two different alkylaryl phosphites, wherein some alkyl groups have a different number of carbon atoms than other alkyl groups and wherein the composition is a liquid at ambient conditions.

Hydrolytically stable phosphites as secondary antioxidants for polymer resins comprising a phosphite and an amine compound. The phosphite may be a liquid phosphite composition. The amine compound may have the structure of formula I: wherein x is 1, 2 or 3; Ris selected from the group consisting of hydrogen, and straight or branched C-Calkyl, and Ris selected from the group consisting of straight or branched C-Calkyl.

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Flixton, United Kingdom

Jonathan S Hill