Claims
- 1. A refrigerant lubricant for a refrigerating machine which comprises:
- 50 wt % or less of a base oil selected from the group consisting of polyglycol oils, minerals oils, poly-.alpha.-olefins and alkylbenzenes; and
- 50-100 wt % of a polyoxyalkylene glycidyl ether represented by the general formula ##STR10## wherein B is a residue of a compound having 2 to 8 hydroxyl groups, A.sub.1 O, A.sub.2 O, and A.sub.3 O each is an oxyalkylene group having 2 to 18 carbon atoms, R is a hydrocarbon group having 1 to 24 carbon atoms, a is an integer of from 1 to 100, b is an integer of from 1 to 100, c is an integer of from 1 to 100, l is an integer of from 1 to 8, m is an integer of from 0 to 7, n is an integer of from 0 to 7, and l+m+n is an integer of from 2 to 8, and wherein said glycidyl ether has a pour point of -10.degree. C. or less and a kinematic viscosity of from 2 to 50 cSt at 100.degree. C.
- 2. The lubricant according to claim 1, further comprising at least one additive in an amount of 10 weight percent or less based on the total weight of said lubricant, said additive is selected from the group consisting of an antioxidant, a wear inhibitor, an extreme pressure additive, an oiliness improver, an anti-foaming agent, a metal inactivating agent, and a hydrochloric acid trapping agent.
- 3. The lubricant for a refrigerating machine according to claim 1, wherein said polyoxyalkylene glycidyl ether has a number average molecular weight of from 200 to 4,000.
- 4. A method for improving lubrication in a refrigerating machine, said method comprising using in said refrigerating machine a lubricant which has a pour point of -10.degree. C. or less, a kinematic viscosity of from 2 to 50 cSt at 100.degree. C., and which comprises;
- 50 wt % or less of a base oil selected from the group consisting of polyglycol oils, minerals oils, poly-.alpha.-olefins and alkylbenzenes; and
- 50-100 wt % of a polyoxyalkylene glycidyl ether represented by the general formula, ##STR11## wherein B is a residue of a compound having 2 to 8 hydroxyl groups, A.sub.1 O, A.sub.2 O, and A.sub.3 O each is an oxyalkylene group having 2 to 18 carbon atoms, R is a hydrocarbon group having 1 to 24 carbon atoms, a is an integer of from 1 to 100, b is an integer of from 1 to 100, c is an integer of from 1 to 100, is an integer of from 1 to 8, m is an integer of from 0 to 7, n is an integer of from 0 to 7, and +m+n is an integer of from 2 to 8.
- 5. The method according to claim 4, wherein said polyoxyalkylene glycidyl ether has a number average molecular weight of from 200 to 4,000.
- 6. The method according to claim 4, wherein said lubricant further comprises at least one additive in an amount of 10 weight percent or less based on the total weight of said lubricant, said additive is selected from the group consisting of an antioxidant, a wear inhibitor, an extreme pressure additive, an oiliness improver, an anti-foaming agent, a metal inactivating agent, and a hydrochloric acid trapping agent.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-206660 |
Aug 1989 |
JPX |
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Parent Case Info
This is a continuation of application No. 07/892,668, filed on Jun. 3, 1992, which was abandoned upon the filing hereof which is a cont. of 07/687,770 filed Apr. 18, 1991 (abandoned) which is a cont. of 07/564,190 filed Aug. 8, 1990 (abandoned).
US Referenced Citations (11)
Continuations (3)
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Number |
Date |
Country |
Parent |
892668 |
Jun 1992 |
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Parent |
687770 |
Apr 1991 |
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Parent |
564190 |
Aug 1990 |
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