Chemtura Corporation

King Industries, Inc.

Lanxess Solutions US Inc.

Lanxess Corporation

Edward T Hessell

Dale D Carr

Roberto Urrego

Jeffrey Hutter

Richard Kelley

Richard A Abramshe

Travis Benanti

Werner J Blank

Lawrence V Gallacher

Robert Urrego

High viscosity working fluids comprising a fluorinated olefin refrigerant, such as a hydrofluoro-olefin refrigerant, and a high viscosity polyol ester comprising a select mixture of alkylcarboxy esters of pentaerythritol, di-pentaerythritol, tri-pentaerythritol and pentaerythritol oligomers are provided.

Working fluids comprising fluorinated olefins and polyol esters

Working fluids comprising a refrigerant blend comprising a fluorinated alkane and a fluorinated olefin refrigerant, and a polyol ester lubricant composition comprising a mixture of alkylcarboxy esters of mono-pentaerythritol, di-pentaerythritol, tri-pentaerythritol and pentaerythritol oligomers, wherein at least 10 wt % of all polyol esters are esters of pentaerythritol oligomers of 4 or more pentaerythritol monomer groups.

Working fluids comprising fluorinated olefins/fluorinated saturated hydrocarbon blends and polyol esters

Mixtures of select neopentyl polyol esters are found to be highly miscible with the refrigerant R-32 over a wide temperature range. Working fluids are provided comprising R-32 and a lubricant containing these select neopentyl polyol esters and having a kinematic viscosity at 40&#xb0; C. of 32 cSt or higher. Specifically, the lubricant composition of the invention comprises a mixture of alkylcarboxy esters of neopentyl polyols, wherein at least 10 wt % of all neopentyl polyol esters are esters of pentaerythritol oligomers of 4 or more pentaerythritol monomer groups, and wherein a majority of the alkylcarboxylate groups of the alkylcarboxy esters of neopentyl polyols are pentanoyl groups wherein at least 15% of the pentanoyl groups are branched.

Polyester lubricant for working fluids comprising difluoromethane

A poly(neopentylpolyol) ester composition is produced by reacting a neopentylpolyol having the formula: wherein each R is independently selected from the group consisting of CH, CHand CHOH and n is a number from 1 to 4, with at least one monocarboxylic acid having 2 to 15 carbon atoms in the presence of an acid catalyst and at an initial mole ratio of carboxyl groups to hydroxyl groups of greater than 0.5:1 to 0.95:1 to form a partially esterified poly(neopentylpolyol) composition. Then the partially esterified poly(neopentylpolyol) composition is reacted with additional monocarboxylic acid having 2 to 15 carbon atoms to form a final poly(neopentylpolyol) ester composition.

Production of polyol ester lubricants for refrigeration systems

Lubricant compositions comprising certain mixtures of esters of pentaerythritol, di-pentaerythritol, tri-pentaerythritol and higher pentaerythritol oligomers are ideally suited for use with COas refrigerant in heat transfer devices provided that at least 30% by weight of the esters are esters of pentaerythritol oligomers containing 4 or more pentaerythritol monomer units and wherein a majority of the alkylcarboxylate groups are straight chain Calkanoyl groups, such as n-pentanoyl. Said mixture of alkylcarboxylate esters are shown to not only have higher than expected viscosity and exceptional COmiscibility, but also possess excellent lubricity, film building properties and load bearing properties even as part of a lubricant/COsolution.

Refrigeration oil and compositions with carbon dioxide refrigerant

Mixtures of select neopentyl polyol esters are found to be highly miscible with the refrigerant R-32 over a wide temperature range. Working fluids are provided comprising R-32 and a polyol ester lubricant composition having a kinematic viscosity at 40&#xb0; C. of from 32 to 120 cSt, said lubricant composition comprising Calkylcarboxy esters di-pentaerythritol wherein at least 40 mol %, typically more, of the alkylcarboxylate groups of the alkylcarboxy esters are pentanoyl groups.

Working fluids comprising difluoromethane and di-pentaerythritol ester

Polyol ester lubricant compositions comprising predominately straight chain Calkylcarboxlate esters of neopentyl alcohols, for example, straight chain Calkylcarboxlate esters of one or more of trimethylol propane, pentaerythritol, di-pentaerythritol, tri-pentaerythritol or pentaerythritol oligomers, and working fluids comprising said lubricant compositions and a hydrocarbon refrigerant, suitable for heat transfer devices including refrigeration and air conditioning systems are provided. The polyol ester lubricant compositions have a kinematic viscosity at 40&#xb0; C. of 22-125 cSt and a viscosity index of greater than 140, and are characterized by having very high lubricity, excellent load carrying properties and excellent low temperature properties.

Refrigeration oil and compositions with hydrocarbon refrigerants

A polyol ester suitable for use as a lubricant or a lubricant base stock has a kinematic viscosity at 40&#xb0; C. greater than or equal to 200 cSt and a viscosity index of greater than or equal to 100. The ester comprises the reaction product of (a) a polyhydric alcohol component comprising at least 50 mole % of penterythritol, and (b) a carboxylic acid component comprising:

Lubricants for refrigeration systems

A polyol ester suitable for use as a lubricant or a lubricant base stock has a kinematic viscosity at 40&#xb0; C. less than or equal to 22 cSt and a viscosity index of greater than or equal to 140. The ester comprises a reaction product of (a) at least one polyhydric alcohol having at least 2 primary hydroxyl groups, (b) at least one monocarboxylic acid having 2 to 15 carbon atoms and (c) at least one polycarboxylic acid having 2 to 15 carbon atoms, wherein the number of acid groups derived from the polycarboxylic acid(s) is at least 25% of the total number of acid groups derived from the monocarboxylic and polycarboxylic acids.

Compositions including blends of Group II and/or Group III base oils and alkkylated fused and/or polyfused aromatic compositions, such as alkylated naphthalenes are provided. The use of such compositions, which exhibit excellent additive solvency, thermo-oxidative stability, hydrolytic stability, and seal swell characteristics, as lubricants is disclosed.

Compositions of Group II and/or Group III base oils and alkylated fused and/or polyfused aromatic compounds

Alkylaryl and arylalkyl monosulfonic acid catalysts for crosslinking polyethylene

Alkylated aryl disulfonic acid catalysts for crosslinking polyethylene

A unique ashless composition of matter, a method for its preparation and its use as an improved corrosion inhibitor additive for formulated industrial lubricants is disclosed.

Growing community of inventors

Fairfield, CT, United States of America

Edward T Hessell