초록 ▼

Esters and mixtures of esters of polyhydric alcohols, e.g., of pentaerythritol, in which at least 22 number percent of the acyl groups in the esters are either branched or contain no more than six carbon atoms, are effective lubricants and/or lubricant base stocks for chlorine-free fluorocarbon refr

Esters and mixtures of esters of polyhydric alcohols, e.g., of pentaerythritol, in which at least 22 number percent of the acyl groups in the esters are either branched or contain no more than six carbon atoms, are effective lubricants and/or lubricant base stocks for chlorine-free fluorocarbon refrigerant heat transfer fluids, particularly for chlorine-free heat transfer fluids such as Refrigerant 134a (1,1,1,2-tetrafluoroethane).

대표청구항 ▼

A refrigerant working fluid comprising: (A) a fluoro-group-containing heat transfer fluid; and (B) a lubricant composition consisting essentially of materials selected from the group consisting of esters of (i) alcohols containing at least two －OH groups and (ii) organic carboxylic acids, wherein: (

A refrigerant working fluid comprising: (A) a fluoro-group-containing heat transfer fluid; and (B) a lubricant composition consisting essentially of materials selected from the group consisting of esters of (i) alcohols containing at least two －OH groups and (ii) organic carboxylic acids, wherein: (a) at least about 22 number percent of the acyl groups in the total of all the esters in said lubricant composition include no more than six carbon atoms, or include at least one carbon atom bonded to at least three other carbon atoms by single bonds, or both; (b) the ratio of the number percent of acyl groups in the total of all the esters in said lubricant composition that are that contain 8 or more carbon atoms and are unbranched to the number percent of acyl groups in the total of all the esters in said lubricant composition that are both branched and contain not more than 6 carbon atoms is not greater than about 1.56; (c) the number percent of acyl groups in the total of all the esters in said lubricant composition that contain nine or more carbon atoms is not greater than about 81; and (d) at least 62 number percent of the total of all the alcohol moieties in the esters in said lubricant composition contain at least one carbon atom that is bonded by carbon-carbon single bonds to four other carbon atoms.