Patent US3883598A successfully refreshed from Google Patents.
US3883598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxy, hydroxy containing aliphatic sulfides
Assignee: W R Grace & Co Washington Rese
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Filing: 1973-09-04
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Granted: 1975-05-13
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Expires: 1993-09-04
Abstract
Abstract This invention is directed to thiol containing compounds having no hydrolytically sensitive groupings which are useful as polymerization transfer agents or as curing agents in curable polymer systems containing polyenes and a free radical initiator. The thiol containing compounds are formed by reacting a polyol with an allylic halide to form a poly(unsaturated ether) whose double bonds are converted to thioesters by free radical catalyzed addition of SH groups from a thiolcarboxylic acid, e.g. thioacetic acid and the like. Hydrolysis of the thioester yields the desired thiol or polythiol derivative. Alternatively the poly(unsaturated ether) is reacted with H2S to give the desired thiol or polythiol directly in a single step.
Inventors
- 👤 James L Guthrie
- 👤 Shrikant V Dighe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C07; C07C; C07C323/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
6 words
AN ETHER THIOL OF THE FORMULA:
Claim 2
Dependent Claim
6 words
AN ETHER THIOL OF THE FORMULA:
Claim 3
Dependent Claim
89 words
The process of forming an ether thiol which comprises reacting at a temperature ranging from 40* to 95*C at atmospheric pressure, in the presence of a base, a polyol of the general formula: HO-R-(OH)m wherein R is an aliphatic hydrocarbon or aliphatic ether containing up to 15 carbon atoms and m is an integer of 1 to 7 with a stoichiometric excess necessary to react with all but one of the hydroxyl groups on the polyol ranging from 100 to 400% of an allylic halide of the general formula:
Claim 4
Dependent Claim
89 words
The process of forming an ether thiol which comprises reacting at a temperature ranging from 40* to 95*C at atmospheric pressure, in the presence of a base, a polyol of the general formula: HO-R-(OH)m wherein R is an aliphatic hydrocarbon or aliphatic ether containing up to 15 carbon atoms and m is an integer of 1 to 7 with a stoichiometric excess necessary to react with all but one of the hydroxyl groups on the polyol ranging from 100 to 400% of an allylic halide of the general formula:
Claim 5
Dependent Claim
89 words
The process of forming an ether thiol which comprises reacting at a temperature ranging from 40* to 95*C at atmospheric pressure, in the presence of a base, a polyol of the general formula: HO-R-(OH)m wherein R is an aliphatic hydrocarbon or aliphatic ether containing up to 15 carbon atoms and m is an integer of 1 to 7 with a stoichiometric excess necessary to react with all but one of the hydroxyl groups on the polyol ranging from 100 to 400% of an allylic halide of the general formula:
Claim 6
Dependent Claim
89 words
The process of forming an ether thiol which comprises reacting at a temperature ranging from 40* to 95*C at atmospheric pressure, in the presence of a base, a polyol of the general formula: HO-R-(OH)m wherein R is an aliphatic hydrocarbon or aliphatic ether containing up to 15 carbon atoms and m is an integer of 1 to 7 with a stoichiometric excess necessary to react with all but one of the hydroxyl groups on the polyol ranging from 100 to 400% of an allylic halide of the general formula:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |