Patent EP0120108A1 successfully refreshed from Google Patents.
US3882091A
Expired / Lapsed
US
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Epoxy terminated polysulfide polymers as adhesive additives for liquid polysulfide polymer-based adhesive compositions
Assignee: ATK Launch Systems LLC
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Filing: 1973-07-06
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Granted: 1975-05-06
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Expires: 1993-07-06
Abstract
Abstract An expoxy terminated polysulfide polymer is prepared by reacting a liquid polythiol polymer with vinyl cyclohexane diepoxide. The polysulfide polymers modified with epoxy groups are effective as adhesive additives for liquid polysulfide polymer based compositions, used as sealants or bonding agents on various substrates such as glass or aluminum.
Inventors
- 👤 Jose L Villa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:59
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14; C08L; C08L81/00; C08L81/04; C09; C09J; C09J181/00; C09J181/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
AN EPOXY TERMINATED POLYSULFIDE POLYMER PREPARED BY REACTING A LIQUID POLYTHIOL POLYMER HAVING A MOLECULAR WEIGHT OF 500 TO 4,000 AND VINYL CYCLOHEXANE DIEPOXIDE IN AN ORGANIC SOLVENT AT A TEMPERATURE OF FROM 50*C TO 113*C. WITH A CATALYST CONSISTING OF PARA-TOLUENE SULFONIC ACID IN A CLOSED VESSEL EQUIPPED WITH REFLUXING APPARATUS AND A STIRRER.
Claim 2
Dependent Claim
55 words
AN EPOXY TERMINATED POLYSULFIDE POLYMER PREPARED BY REACTING A LIQUID POLYTHIOL POLYMER HAVING A MOLECULAR WEIGHT OF 500 TO 4,000 AND VINYL CYCLOHEXANE DIEPOXIDE IN AN ORGANIC SOLVENT AT A TEMPERATURE OF FROM 50*C TO 113*C. WITH A CATALYST CONSISTING OF PARA-TOLUENE SULFONIC ACID IN A CLOSED VESSEL EQUIPPED WITH REFLUXING APPARATUS AND A STIRRER.
Claim 3
Dependent Claim
14 words
The epoxy terminated polysulfide polymer as in claim 1 wherein the solvent is dioxane.
Claim 4
Dependent Claim
24 words
The epoxy terminated polysulfide polymer as in claim 1 wherein the said liquid polythiol polymer is non-crosslinked and has a molecular weight of 1,000.
References Cited (Backward Citations)
US3717618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |