US4049676A
Expired / Lapsed
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Sulfolanyloxyalkyl cyclic polysiloxanes
Assignee: OSI Specialties Inc
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Filing: 1975-06-30
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Granted: 1977-09-20
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Expires: 1995-06-30
Abstract
Abstract Provided as novel compositions are sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes. The cyclic polysiloxanes of the invention are especially useful as monomers for the formation of higher molecular weight polymers comprising difunctional dialkylsiloxy units in combination with difunctional sulfolanyloxyalkylmonoalkylsiloxy units.
Inventors
- 👤 Curtis Louis Schilling, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:35
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/21; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/28; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes having the general formula, ##STR11## wherein: --R'-- is bivalent alkylene of two to eight carbon atoms; R is alkyl of one to ten carbon atoms; and R 1 , R 2 , R 3 and R 4 are independently hydrogen or alkyl of one to four carbon atoms.
Claim 2
Dependent Claim
49 words
Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes having the general formula, ##STR11## wherein: --R'-- is bivalent alkylene of two to eight carbon atoms; R is alkyl of one to ten carbon atoms; and R 1 , R 2 , R 3 and R 4 are independently hydrogen or alkyl of one to four carbon atoms.
Claim 3
Dependent Claim
25 words
Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes having the general formula, ##STR12## wherein: c has a value from three to six; and R is alkyl of one to four carbon atoms.
Claim 4
Dependent Claim
25 words
Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes having the general formula, ##STR12## wherein: c has a value from three to six; and R is alkyl of one to four carbon atoms.
Claim 5
Dependent Claim
15 words
Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes as defined in claim 2 in which --C c H 2c -- is trimethylene.
Claim 6
Dependent Claim
21 words
Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes as defined in claim 2 in which --C c H 2c -- is --CH 2 CH(CH 3 )CH 2 --.
Claim 7
Dependent Claim
11 words
Sulfolanyloxyalkylheptaalkylcyclotetrasiloxanes as defined in claim 2 in which R is methyl.
Claim 8
Dependent Claim
1 words
3-(Sulfolan-3-yloxy)propylheptamethylcyclotetrasiloxane.
Claim 9
Dependent Claim
1 words
3-(Sulfolan-3-yloxy)propylheptamethylcyclotetrasiloxane.
References Cited (Backward Citations)
US2833801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |