EP0017072A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Water-resistant lubricant for compressors and marine engines
Assignee: Dow Chemical Co
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Filing: 1980-03-18
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Granted: —
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Expires: 2000-03-18
Abstract
Abstract ynthetic lubricants containing (A) 15 to 45 weight percent of an ester of a hindered polyhydric alcohol having 3 to 6 hydroxy groups and 5 to 10 carbon atoms with one or more alkanoic acids having 4 to 18 carbon atoms blended with (B) 85 to 55 weight percent of one or more polyoxyalkylene glycols or their mono- or dialkyl ethers having a 400-5000 number average molecular weight. The blends are compounded with antioxidants, corrosion inhibitors, and metal deactivators to produce a superior lubricant for rotary screw compressors that has a long life.
Inventors
- 👤 Robert Carswell
- 👤 Philip Wayne Mcgraw
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 00:15
CPC Classifications
C; C10; C10M; C10M111/00; C10M111/04; C10M171/00; C10M171/008; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/14; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/25; C10N2040/252; C10N2040/253; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A lubricant composition characterized in that it contains (A) 15 to 45 weight percent of an ester of a hindered polyhydric alcohol having 3 to 6 hydroxyl groups and from 5 to 10 carbon atoms with one or more alkanoic acids having 4 to 18 carbon atoms, and (B) 85 to 55 weight percent of one or more compositions having a flash point greater than 191°C and having the formula where R is hydrogen or an alkyl group of 1-6 carbon atoms, R' is hydrogen or methyl, and n is a number having an average value which will give a molecular weight range from 400 to 5000.
Claim 2
Dependent Claim
107 words
A lubricant composition characterized in that it contains (A) 15 to 45 weight percent of an ester of a hindered polyhydric alcohol having 3 to 6 hydroxyl groups and from 5 to 10 carbon atoms with one or more alkanoic acids having 4 to 18 carbon atoms, and (B) 85 to 55 weight percent of one or more compositions having a flash point greater than 191°C and having the formula where R is hydrogen or an alkyl group of 1-6 carbon atoms, R' is hydrogen or methyl, and n is a number having an average value which will give a molecular weight range from 400 to 5000.
Claim 3
Dependent Claim
34 words
The lubricant composition of Claim 1 and further characterized in that the weight percent of the ester ranges from 22 to 35 and the weight percent of the glycol ranges from 78 to 65.
Claim 4
Dependent Claim
65 words
A lubricant composition characterized in that it contains (A) 15 to 45 weight percent of an ester of pentaerythritol with one or more alkanoic acids having 4 to 18 carbon atoms, and (B) 85 to 55 weight percent of one or more polyoxyalkylene glycols having a flash point greater than 191°C and having a number molecular weight range from 700 to 2500 and mixtures thereof.
Claim 5
Dependent Claim
65 words
A lubricant composition characterized in that it contains (A) 15 to 45 weight percent of an ester of pentaerythritol with one or more alkanoic acids having 4 to 18 carbon atoms, and (B) 85 to 55 weight percent of one or more polyoxyalkylene glycols having a flash point greater than 191°C and having a number molecular weight range from 700 to 2500 and mixtures thereof.
Claim 6
Dependent Claim
34 words
The lubricant composition of Claim 3 and further characterized in that the weight percent of the ester ranges from 22 to 35 and the weight percent of the polyglycol ranges from 78 to 65.
Claim 7
Dependent Claim
20 words
The lubricant composition of Claim 4 wherein the glycol is polypropylene glycol having a number average molecular weight of 1200.
Claim 8
Dependent Claim
22 words
The lubricant composition of Claim 5 which comprises 30 weight percent of said ester and 70 weight percent of said polypropylene glycol.
Claim 9
Dependent Claim
39 words
The composition of Claim 1 and further characterized in that it also contains (A) an effective amount of an antioxidant, (B) an effective amount of a ferrous metal corrosion inhibitor, and (C) an effective amount of a metal deactivator.
Claim 10
Dependent Claim
51 words
The composition of Claim 1 and further characterized in that it also contains (A) 0.1 to 5.0 weight percent of an aromatic amine antioxidant, (B) 0.1 to 5.0 weight percent of a metal salt of an aromatic sulfonic acid, and (C) 0.001 to 0.5 weight percent of a N-heterocyclic metal deactivator.
References Cited (Backward Citations)
No citation records indexed.
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