US5049292A
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US
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Lubricant composition for refrigerator systems
Assignee: Wintershall Dea International AG
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Filing: 1989-06-23
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Granted: 1991-09-17
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Expires: 2009-06-23
Abstract
Abstract A lubricant for refrigerators which contains phosphate, phosphite and/or silicone additives which impart stability and thermal stability to the lubricant.
Inventors
- 👤 Hans D. Grasshoff
- 👤 Vladislav Synek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:05
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M169/044; C10M101/00; C10M101/02; C10M105/00; C10M105/02; C10M105/06; C10M107/00; C10M107/02; C10M137/00; C10M137/02; C10M137/04; C10M155/00; C10M155/02; C10M171/00; C10M171/008; C10M2203/00; C10M2203/06; C10M2203/065; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2205/00; C10M2205/02; C10M2205/028; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2040/00; C10N2040/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
191 words
A mineral oil lubricant containing mineral oils, synthetic lubricating fluid and/or mixtures of mineral oils and synthetic lubricating fluids, said synthetic lubricating fluids consisting of (a) dialkylbenzenes or mixtures of mon- and dialkyl-benzenes which have straight-chain and branched-chain (C 1 -C 20 ) alkyl groups and/or (b) poly-α-olefins and (c) additives which consist of (i) an organic phosphate of the formula ##STR5## wherein R 1 , R 2 and R 3 are (C 1 -C 15 ) alkyl, aryl and alkylaryl group, which may be the same or different, in an amount of about 0.01 to about 10 wt. %, based on the total weight of the lubricant, (ii) an organic phosphite of the formula ##STR6## wherein R 4 , R 5 and R 6 are (C 1 -C 15 ) alkyl, aryl and alkylaryl groups, which may be the same or different, in an amount of about 0.001 to about 1.0 wt. %, based on the total amount of the lubricant, and optionally (iii) an organic or organhalogen silicone in an amount of about 0 to about 100 mg, based on a total weight of 1 kg of the lubricant.
Claim 2
Dependent Claim
191 words
A mineral oil lubricant containing mineral oils, synthetic lubricating fluid and/or mixtures of mineral oils and synthetic lubricating fluids, said synthetic lubricating fluids consisting of (a) dialkylbenzenes or mixtures of mon- and dialkyl-benzenes which have straight-chain and branched-chain (C 1 -C 20 ) alkyl groups and/or (b) poly-α-olefins and (c) additives which consist of (i) an organic phosphate of the formula ##STR5## wherein R 1 , R 2 and R 3 are (C 1 -C 15 ) alkyl, aryl and alkylaryl group, which may be the same or different, in an amount of about 0.01 to about 10 wt. %, based on the total weight of the lubricant, (ii) an organic phosphite of the formula ##STR6## wherein R 4 , R 5 and R 6 are (C 1 -C 15 ) alkyl, aryl and alkylaryl groups, which may be the same or different, in an amount of about 0.001 to about 1.0 wt. %, based on the total amount of the lubricant, and optionally (iii) an organic or organhalogen silicone in an amount of about 0 to about 100 mg, based on a total weight of 1 kg of the lubricant.
Claim 3
Dependent Claim
29 words
The lubricant of claim 1, wherein the phosphate is present in the amount of about 0.5 to about 5.0 wt. %, based on the total weight of the lubricant.
Claim 4
Dependent Claim
27 words
The lubricant of claim 1, wherein said lubricant contains about 1.0 to about 2.0 wt. % of said phosphate, based on the total weight of the lubricant.
Claim 5
Dependent Claim
29 words
The lubricant of claim 1, wherein the phosphite is present in an amount of about 0.05 to about 0.5 wt. %, based on the total weight of the lubricant.
Claim 6
Dependent Claim
27 words
The lubricant of claim 1, wherein the lubricant contains about 0.1 to about 0.2 wt. % of said phosphite, based on the total weight of the lubricant.
Claim 7
Dependent Claim
31 words
The lubricant of claim 1, wherein the silicone is present in an amount of about 1 to about 50 mg, based on a total weight of 1 kg of the lubricant.
Claim 8
Dependent Claim
31 words
The lubricant of claim 1, wherein the silicone is present in an amount of about 3 to about 10 mg, based on a total weight of 1 kg of the lubricant.
Claim 9
Dependent Claim
16 words
The lubricant of claim 1, wherein said lubricant contains triphenyl phosphate, diphenylcresyl phosphate and/or tricresyl phosphate.
Claim 10
Dependent Claim
29 words
The lubricant of claim 1, wherein said lubricant contains isopropylated triphenyl phosphate in an amount of about 1.0 to about 2 mol of isopropyl per mol of triphenyl phosphate.
Claim 11
Dependent Claim
18 words
The lubricant of claim 1, wherein said lubricant contains didodecylphenyl phosphite, triphenyl phosphite, dodecyldiphenyl phosphite and mixtures thereof.
Claim 12
Dependent Claim
12 words
The lubricant of claim 1, wherein said lubricant contains a methyl silicone.
Claim 13
Dependent Claim
178 words
A lubricant consisting of synthetic lubricating fluids, said lubricating fluids consisting of (a) dialkylbenzenes or mixtures of mono- and dialkyl-benzenes which have straight-chain and branched-chain (C 1 -C 20 ) alkyl groups and/or (b) poly-α-olefins; and (c) additives which consist of (i) an organic phosphate of the formula ##STR7## wherein R 1 , R 2 and R 3 are (C 1 -C 15 ) alkyl, aryl and alkylaryl group, which may be the same or different, in an amount of about 0.01 to about 10 wt. %, based on the total weight of the lubricant, (ii) an organic phosphite of the formula ##STR8## wherein R 4 , R 5 and R 6 are (C 1 -C 15 ) alkyl, aryl and alkylaryl groups, which may be the same or different, in an amount of about 0.001 to about 1.0 wt. %, based on the total weight of the lubricant, and optionally (iii) an organic or organohalogen silicone in an amount of about 0 to about 100 mg, based on a total weight of 1 kg of the lubricant.
Claim 14
Dependent Claim
178 words
A lubricant consisting of synthetic lubricating fluids, said lubricating fluids consisting of (a) dialkylbenzenes or mixtures of mono- and dialkyl-benzenes which have straight-chain and branched-chain (C 1 -C 20 ) alkyl groups and/or (b) poly-α-olefins; and (c) additives which consist of (i) an organic phosphate of the formula ##STR7## wherein R 1 , R 2 and R 3 are (C 1 -C 15 ) alkyl, aryl and alkylaryl group, which may be the same or different, in an amount of about 0.01 to about 10 wt. %, based on the total weight of the lubricant, (ii) an organic phosphite of the formula ##STR8## wherein R 4 , R 5 and R 6 are (C 1 -C 15 ) alkyl, aryl and alkylaryl groups, which may be the same or different, in an amount of about 0.001 to about 1.0 wt. %, based on the total weight of the lubricant, and optionally (iii) an organic or organohalogen silicone in an amount of about 0 to about 100 mg, based on a total weight of 1 kg of the lubricant.
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