Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
216 words
A refrigerator oil lubricant composition characterised in that it comprises (a) a polyoxyalkylene glycol ether having the formula (I) wherein AO is one or more groups selected from the group consisting of -CH 2 CH 2 - and -CH 2 0- and, in the case of two or more groups, they may together form a block copolymer or a random copolymer; n = p + q + r in which p is the average number of the groups represented by q is the average number of the groups represented by -CH 2 CH 2 0-, r is the average number of the groups represented by -CH 2 0-, p is in the range of 1 to 80, q is in the range of 0 to 60, r is 0 or 1 and the relation 0 ≤ q/(p+q) ≤ 0.6 holds; and R 1 and R 2 are each a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms provided that they should not be simultaneously hydrogen atoms, and having a kinematic viscosity at 40°C in the range of 6 to 500 cSt; and (b) 0.01 to 25 parts by weight, based on 100 parts by weight of said polyoxyalkylene glycol ether, of a polyglycidyl ether compound prepared from a dihydric or trihydric alcohol.
Claim 2
Dependent Claim
216 words
A refrigerator oil lubricant composition characterised in that it comprises (a) a polyoxyalkylene glycol ether having the formula (I) wherein AO is one or more groups selected from the group consisting of -CH 2 CH 2 - and -CH 2 0- and, in the case of two or more groups, they may together form a block copolymer or a random copolymer; n = p + q + r in which p is the average number of the groups represented by q is the average number of the groups represented by -CH 2 CH 2 0-, r is the average number of the groups represented by -CH 2 0-, p is in the range of 1 to 80, q is in the range of 0 to 60, r is 0 or 1 and the relation 0 ≤ q/(p+q) ≤ 0.6 holds; and R 1 and R 2 are each a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms provided that they should not be simultaneously hydrogen atoms, and having a kinematic viscosity at 40°C in the range of 6 to 500 cSt; and (b) 0.01 to 25 parts by weight, based on 100 parts by weight of said polyoxyalkylene glycol ether, of a polyglycidyl ether compound prepared from a dihydric or trihydric alcohol.
Claim 3
Dependent Claim
53 words
The composition as claimed in claim 1, characterised in that R1 and R2 are each independently selected from methyl, ethyl, 1-propyl, 1-butyl and 2-methyl-1-propyl; the kinematic viscosity of (a) ranges from 10 to 200 cSt.; and the carbon number ratio of the alcohol part to the glycidyl ether part is 1.5 or more.
Claim 4
Dependent Claim
32 words
The composition as claimed in claim 1 or 2, characterised in that it comprises (a) and 0.5 to 5 parts by weight, based on 100 parts by weight of (a), of (b).
Claim 5
Dependent Claim
30 words
A refrigerator oil composition characterised by comprising a fluorocarbon-based refrigerant containing no chlorine and the lubricant composition as defined in claim 1 at a weight ratio of 1:99 to 99:1.
Claim 6
Dependent Claim
26 words
The composition as claimed in claim 4, characterised in that the refrigerant is selected from the group consisting of 1,1,2,2-tetrafluoroethane, 1,1,1,2-tetrafluoroethane, 1,1,2-trifluoroethane, 1,1,1-trifluoroethane, 1,2-difiuoroethane and 1,1-difluoroethane.