US4714794A
Expired / Lapsed
US
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Synthetic oils
Assignee: Eneos Corp
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Filing: 1987-05-15
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Granted: 1987-12-22
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Expires: 2007-05-15
Abstract
Abstract A synthetic oil having excellent oxidation stability, comprising a mixture of monoalkylnaphthalenes which have each a secondary alkyl group of 6 to 24 carbon atoms and in which the specific molar ratio of alpha - to beta -substituted monalkylnaphthalenes is at least 1.0. The synthetic oil is useful as a thermal medium oil or as the main component of a synthetic lubricating oil.
Inventors
- 👤 Toshio Yoshida
- 👤 Harumichi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:40
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/02; C10M105/06; C10M127/00; C10M127/06; C10M2203/00; C10M2203/06; C10N; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/08; C10N2040/20; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
90 words
A method of lubrication which consists of applying to the structure to be lubricated a synthetic oil which comprises as the active ingredient a mixture of monoalkylnaphthalenes represented by the following general formulae, ##STR2## Wherein R 1 , R 2 , R 3 and R 4 are each a straight-chain alkyl group and the total of the carbon atoms in R 1 and R 2 or in R 3 and R 4 is 5 to 23, and the molar ratio of α-substituted monoalkylnaphthalenes to β-substituted monoalkylnaphthalenes being at least 1.0.
Claim 2
Independent Claim
90 words
A method of lubrication which consists of applying to the structure to be lubricated a synthetic oil which comprises as the active ingredient a mixture of monoalkylnaphthalenes represented by the following general formulae, ##STR2## Wherein R 1 , R 2 , R 3 and R 4 are each a straight-chain alkyl group and the total of the carbon atoms in R 1 and R 2 or in R 3 and R 4 is 5 to 23, and the molar ratio of α-substituted monoalkylnaphthalenes to β-substituted monoalkylnaphthalenes being at least 1.0.
Claim 3
Dependent Claim
15 words
A method according to claim 1, wherein the said molar ratio is 1.0 to 2.0.
Claim 4
Dependent Claim
30 words
A method according to claim 1, wherein said total of the carbon atoms in R 1 and R 2 or in R 3 and R 4 in 7 to 13.
Claim 5
Dependent Claim
75 words
A lubricating oil composition containing as the active ingredient a mixture of monoalkylnaphthalenes represented by the following general formulae, ##STR3## wherein R 1 , R 2 , R 3 and R 4 are each a straight-chain alkyl group and the total of the carbon atoms in R 1 and R 2 or in R 3 and R4 is 5 to 23, and the molar ratio of α-substituted monoalkylnaphthalenes to β-substituted monoalkylnaphthalenes being at least 1.0.
Claim 6
Dependent Claim
75 words
A lubricating oil composition containing as the active ingredient a mixture of monoalkylnaphthalenes represented by the following general formulae, ##STR3## wherein R 1 , R 2 , R 3 and R 4 are each a straight-chain alkyl group and the total of the carbon atoms in R 1 and R 2 or in R 3 and R4 is 5 to 23, and the molar ratio of α-substituted monoalkylnaphthalenes to β-substituted monoalkylnaphthalenes being at least 1.0.
Claim 7
Dependent Claim
36 words
A lubricating oil composition according to claim 4 which further comprises at least one of a lubricating oil and a mineral oil, said mineral oil or lubricating oil being in the amount of 25-75% by weight.
Claim 8
Dependent Claim
59 words
A lubricating oil composition according to claim 4 which consists of: 19 mol % of α--(1-methylnonyl) naphthalene; 16 mol % of α--(1-ethyloctyl) naphthalene; 12 mol % of α--(1-propylheptyl) naphthalene; 10 mol % of α--(1-butylhexyl) naphthalene; and 12 mol % of β--(1-methylnonyl) naphthalene; 11 mol % of β--(1-ethyloctyl) naphthalene; 10 mol % of β--(1-propylheptyl) naphthalene; 10mol % of β--(1-butylhexyl) naphthalene
Claim 9
Dependent Claim
48 words
A lubricating oil composition according to claim 4 which consists of: 29 mol % of α--(1-methylheptyl) naphthalene; 17 mol % of α--(1-ethylhexyl) naphthalene; 13 mol % of α--(1-propylpentyl) naphthalene; and 17 mol % of β--(1-methylheptyl) naphthalene; 12 mol % of β--(1-ethylhexyl) naphthalene; 12 mol % of β--(1-propylpentyl) naphthalene;
Claim 10
Dependent Claim
80 words
A lubricating oil composition according to claim 4 which consists of: 18 mol % of α--(1-methylpentadecyl) naphthalene; 10 mol % of α--(1-ethyltetradecyl) naphthalene; 7 mol % of α--(1-propyltridecyl) naphthalene; 5 mol % of α--(1-butyldodecyl) naphthalene; 22 mol % of α--(1-pentylundecyl) naphthalene, α--(1-hexyldecyl) naphthalene, α--(1-heptylnonyl) naphthalene; and 12 mol % of β--(1-methylpentadecyl) naphthalene; 7 mol % of β--(1-ethyltetradecyl) naphthalene; 4 mol % of β--(1-propyltridecyl) naphthalene; 2 mol % of β--(1-butyldodecyl) naphthalene; 13 mol % of β--(1-pentylundecyl) naphthalene, β--(1-hexyldecyl) naphthalene, β--(1-heptylnonyl) naphthalene.
Claim 11
Independent Claim
88 words
A method of improving the oxidation stability of a thermal medium oil which consists of using a composition consisting essentially of a mixture of monoalkylnaphthalenes represented by the following general formulae, ##STR4## wherein R 1 , R 2 , R 3 and R 4 are each a straight-chain alkyl group and the total of the carbon atoms in R 1 and R 2 or in R 3 and R 4 is 5 to 23, and the molar ratio of α-substituted monoalkylnaphthalenes to β-substituted monoalkylnaphthalenes being at least 1.0.
Claim 12
Independent Claim
88 words
A method of improving the oxidation stability of a thermal medium oil which consists of using a composition consisting essentially of a mixture of monoalkylnaphthalenes represented by the following general formulae, ##STR4## wherein R 1 , R 2 , R 3 and R 4 are each a straight-chain alkyl group and the total of the carbon atoms in R 1 and R 2 or in R 3 and R 4 is 5 to 23, and the molar ratio of α-substituted monoalkylnaphthalenes to β-substituted monoalkylnaphthalenes being at least 1.0.
Claim 13
Dependent Claim
15 words
A method according to claim 9, wherein the said molar ratio is 1.0 to 2.0.
Claim 14
Dependent Claim
30 words
A method according to claim 9, wherein said total of the carbon atoms in R 1 and R 2 or in R 3 and R 4 is 7 to 13.
Claim 15
Dependent Claim
74 words
A thermal medium oil consisting essentially of a mixture of monoalkylnaphthalenes represented by the following general formulae, ##STR5## wherein R 1 , R 2 , R 3 and R 4 are each a straight-chain alkyl group and the total of the carbon atoms in R 1 and R 2 or in R 3 and R 4 is 5 to 23, and the molar ratio of α-substituted monoalkylnaphthalenes to β-substituted monoalkylnaphthalenes being at least 1.0.
Claim 16
Dependent Claim
74 words
A thermal medium oil consisting essentially of a mixture of monoalkylnaphthalenes represented by the following general formulae, ##STR5## wherein R 1 , R 2 , R 3 and R 4 are each a straight-chain alkyl group and the total of the carbon atoms in R 1 and R 2 or in R 3 and R 4 is 5 to 23, and the molar ratio of α-substituted monoalkylnaphthalenes to β-substituted monoalkylnaphthalenes being at least 1.0.
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