Refrigerating oil composition containing a polyether additive

A refrigerating oil composition comprising:

• (A) a base oil, and
• (B) an etherified compound, or 0.1-30 wt. % of a polyalkylene glycol derivative,
• wherein the base oil is selected from the group consisting of polyvinyl ether, carbonate derivative, polyether ketone, and mixtures thereof;
• and the etherified compound is selected from the group consisting of etherified compounds of polyhydric alcohols having functionality of 3-6, and etherified compounds of dimeric or trimeric condensates of aliphatic polyhydric alcohols having functionality of 3-6;
• wherein the polyalkylene glycol derivative has the structure of formula (I):
• R1—(OR2)m—(OR3)n—OR4 (I)
• and a number average molecular weight of 200-3,000;
• each of R1 and R4 represents a C1-C30 hydrocarbon group or acyl group, or hydrogen;
• R2 represents a C2-C4 alkylene group;
• R3 represents a C2-C30 alkylene group which may or may not be substituted;
• m and n are numbers that satisfy the above-described molecular weight conditions, wherein n may be 0;
• and at least one of R1, R3, and R4 has a hydrocarbon group having six or more carbon atoms;
• and, wherein the etherified compounds of polyhydric alcohols having a functionality of 3-6, or etherified compounds of dimeric or trimeric condensates of aliphatic polyhydric alcohols having a functionality of 3-6, have a kinematic viscosity of 5-200 mm2/s at 40° C.

A refrigerating oil composition comprising:

• (A) a base oil, and (B) 0.1-30 wt. % of a polyalkylene glycol derivative of formula (I) having a number average molecular weight of 200-3,000:
• Rl—(OR2)m—(OR3)n—OR4 (I)
• wherein each of R1 and R4 represents a C1-C30 hydrocarbon group or acyl group, or hydrogen with the proviso that R1 and R4 are not aromatic groups;
• R2 represents a C2-C4 alkylene group;
• R3 represents a C2-C30 alkylene group which may or may not be substituted;
• m and n are numbers that satisfy the above-described molecular weight conditions, wherein n may be 0;
• and at least one of R1, R3, and R4 has a hydrocarbon group having six or more carbon atoms, and the base oil is selected from the group consisting of polyvinyl ether, carbonate derivative, polyether ketone, fluorinated oils, and mixtures thereof.

A refrigerating oil composition comprising:

• (A) a base oil, and
• (B) 0.1-30 wt. % of an etherified compound, or 0.1-30 wt. % of a polyalkylene glycol derivative,
• wherein the base oil is selected from the group consisting of polyvinyl ether, carbonate derivative, polyether ketone, fluorinated oils, and mixtures thereof;
• and the etherified compound is selected from the group consisting of etherified compounds of polyhydric alcohols having functionality of 3-6, and etherified compounds of dimeric or trimeric condensates of aliphatic polyhydric alcohols having finctionality of 3-6;
• wherein the polyalkylene glycol derivative has the structure of formula (I):
• R1—(OR2)m—(OR3)n—OR4 (I)
• and a number average molecular weight of 200-3,000;
• each of R1 and R4 represents a C1-C30 hydrocarbon group or acyl group, or hydrogen with the proviso that R1 and R4 are not aromatic groups;
• R2 represents a C2-C4 alkylene group;
• R3 represents a C2-C30 alkylene group which may or may not be substituted;
• m and n are numbers that satisfy the above-described molecular weight conditions, wherein n may be 0;
• and at least one of R1, R3, and R4 has a hydrocarbon group having six or more carbon atoms;
• and, wherein the etherified compounds of polyhydric alcohols having a functionality of 3-6, or etherified compounds of dimeric or trimeric condensates of aliphatic polyhydric alcohols having a functionality of 3-6, have a kinematic viscosity of 5-200 mm2/s at 40° C.