US4122023A
Expired / Lapsed
US
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Synthetic saturated oils, and their production and use
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1977-10-13
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Granted: 1978-10-24
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Expires: 1997-10-13
Abstract
Abstract Synthetic saturated oils useful as materials for lubricating oils and cosmetics and prepared by hydrogenation of low molecular weight polyisoprene having the 1,4 structure of at least 70% in the main chains and a number average molecular weight of about 290 to 3,000.
Inventors
- 👤 Seimei Yasui
- 👤 Hiroshi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:30
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/31; A61K8/72; A61K8/81; A61K8/8105; A61K8/8111; C; C08; C08C; C08C19/00; C08C19/02; C10; C10M; C10M107/00; C10M107/02; C10M107/14; A61Q1/00; A61Q1/02; A61Q1/04; A61Q1/06; C10M2205/00; C10M2205/06; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/06; C10N2040/12; C10N2040/13; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
39 words
A method for preparation of synthetic saturated oils, which comprises hydrogenation of low molecular weight polyisoprene having the 1,4 structure of at least 70% in the main chains and a number average molecular weight of about 290 to 3,000.
Claim 2
Independent Claim
39 words
A method for preparation of synthetic saturated oils, which comprises hydrogenation of low molecular weight polyisoprene having the 1,4 structure of at least 70% in the main chains and a number average molecular weight of about 290 to 3,000.
Claim 3
Dependent Claim
23 words
The method according to claim 1, wherein the hydrogenation is carried out by treatment with hydrogen in the presence of a hydrogenation catalyst.
Claim 4
Dependent Claim
15 words
The method according to claim 2, wherein the hydrogenation catalyst is nickel, palladium or platinum.
Claim 5
Dependent Claim
33 words
The method according to claim 2, wherein the hydrogenation is carried out at a temperature of about 50° to 350° C. under a hydrogen pressure of about 5 to 300 kg/cm 2 .
Claim 6
Dependent Claim
21 words
The method according to claim 4, wherein the hydrogenation is carried out within a period of about 1 to 100 hours.
Claim 7
Dependent Claim
10 words
The method according to claim 1, followed by fractional distillation.
Claim 8
Dependent Claim
12 words
A synthetic saturated oil prepared by the method according to claim 1.
Claim 9
Dependent Claim
54 words
A synthetic saturated oil which is substantially representable by the formula: ##STR2## wherein R 1 is hydrogen or alkyl having 1 to 8 carbon atoms, R 2 is hydrogen, ethyl or isopropyl and R 1 and R 2 are not hydrogens at the same time, and n is an integer of 3 to 40.
Claim 10
Dependent Claim
54 words
A synthetic saturated oil which is substantially representable by the formula: ##STR2## wherein R 1 is hydrogen or alkyl having 1 to 8 carbon atoms, R 2 is hydrogen, ethyl or isopropyl and R 1 and R 2 are not hydrogens at the same time, and n is an integer of 3 to 40.
Claim 11
Dependent Claim
17 words
The synthetic saturated oil according to claim 8, wherein n is an integer of 4 to 20.
Claim 12
Dependent Claim
20 words
A lubricating oil comprising the synthetic saturated oil according to claim 7 combined with at least one lubricating oil additive.
Claim 13
Dependent Claim
19 words
A cosmetic comprising the synthetic saturated oil according to claim 7 combined with at least one cosmetic oil additive.
Claim 14
Dependent Claim
105 words
A colorless, transparent and odorless, liquid synthetic oil having a boiling point at 760 mmHg ≧ 250° C., a specific gravity of 0.80 ≦ d 20 ≦ 0.92, a refractive index of 1.44 ≦ n D 20 ≦ 1.50, and a viscosity of 5 cp ≦ η 25 ° C. ≦ 10 5 cp, said oil being substantially represented by the formula: ##STR3## wherein R 1 is hydrogen or alkyl having 1 to 8 carbon atoms, R 2 is hydrogen, ethyl or isopropyl and R 1 and R 2 are not hydrogens at the same time, and n is an integer of 3 to 40.
Claim 15
Dependent Claim
105 words
A colorless, transparent and odorless, liquid synthetic oil having a boiling point at 760 mmHg ≧ 250° C., a specific gravity of 0.80 ≦ d 20 ≦ 0.92, a refractive index of 1.44 ≦ n D 20 ≦ 1.50, and a viscosity of 5 cp ≦ η 25 ° C. ≦ 10 5 cp, said oil being substantially represented by the formula: ##STR3## wherein R 1 is hydrogen or alkyl having 1 to 8 carbon atoms, R 2 is hydrogen, ethyl or isopropyl and R 1 and R 2 are not hydrogens at the same time, and n is an integer of 3 to 40.
Claim 16
Dependent Claim
17 words
The liquid synthetic oil according to claim 12, wherein n is an integer of 4 to 20.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |