Chemtura Corporation

Lanxess Corporation

Jeffrey Hutter

Dale D Carr

Edward T Hessell

Richard Kelley

Roberto Urrego

Robert Urrego

Ed Hessell

Dale Carr

Edward Hessell

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

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.

Growing community of inventors

Edison, NJ, United States of America

Jeffrey Hutter