摘要:
In one aspect, compositions are described herein. In some embodiments, a composition comprises an ester reaction product of a structurally symmetric alkoxylated polyol and a carboxylic acid or carboxylic acid equivalent.
摘要:
The working fluid composition for a refrigerating machine of the invention is characterized by comprising an ester of a polyhydric alcohol and a fatty acid with a content of a C5-C9 branched fatty acid of 50-100 % by mole, and a fluoropropene refrigerant and/or trifluoroiodomethane refrigerant. The refrigerating machine oil of the invention is characterized by comprising an ester of a polyhydric alcohol and a fatty acid with a content of a C5-C9 branched fatty acid of 50-100 % by mole, and by being used together with a fluoropropene refrigerant and/or trifluoroiodomethane refrigerant.
摘要:
In order to solve the problem of providing a lubricant for powder metallurgy which is relatively unobjectionable with respect to occupational safety and environmental aspects, a mixture is proposed comprising carnauba wax and at least one vegetable or animal fat.
摘要:
A method is provided for reducing friction between at least two metal surfaces which are in a frictional relationship with each other or otherwise in need of lubrication. The method includes contacting the metal surfaces with an effective amount of a lubricant composition comprised of partially-esterified sucrose molecules having, in one embodiment, an average distribution of from 5 to 7 fatty acids bound to a sucrose backbone. The lubricant may also include from about 20 ppm to about 10,000 ppm of an antioxidant, about half of which may be an active tocopherol.
摘要:
The invention relates to compositions containing mixtures of open-chain and cyclic molecules of the sugar alcohols D-sorbitol and D-mannitol, said molecules being esterified by means of at least one carboxylic acid. The invention also relates to methods for producing said compositions and the use of the inventive compositions as lubricants or as hydraulic fluid.
摘要:
The invention lies in the field of lubricants for thermoplastics and concerns the use of high-purity penta-erythrityl and/or glyceryl esters of technical-grade octadecanoic acid as preferably external lubricants in the manufacture of PVC bottles. The degree of esterification of the esters is 80 to 95 %.
摘要:
A high quality lubricant for compressors operated during at least part of their compression cycle at temperatures above normal human comfort temperatures, such as most automotive air conditioners, especially those using chlorine free hydrofluorocarbon refrigerant working fluids, is provided by mixed esters of hindered polyols, most desirably pentaerythritol, with a mixture of carboxylic acids including at least some iso-pentanoic acid along with either or both of iso-nonanoic acid and dibasic acids such as adipic.