US4017554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide modified polysulfide polymers as adhesive additives for liquid polysulfide polymer based adhesive compositions
Assignee: ATK Launch Systems LLC
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Filing: 1975-10-14
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Granted: 1977-04-12
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Expires: 1995-10-14
Abstract
Abstract 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
2026-10-29 22:17
CPC Classifications
C; C08; C08L; C08L63/00; C08L81/00; C08L81/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
34 words
A curable liquid polysulfide polymer based sealant composition containing, as an adhesive additive, 0.5 to 5.0 parts by weight of epoxy terminated polysulfide resin per 100 parts by weight of curable liquid polysulfide polymer.
Claim 2
Dependent Claim
34 words
A curable liquid polysulfide polymer based sealant composition containing, as an adhesive additive, 0.5 to 5.0 parts by weight of epoxy terminated polysulfide resin per 100 parts by weight of curable liquid polysulfide polymer.
Claim 3
Dependent Claim
23 words
The sealant composition of claim 1 wherein the epoxy terminated polysulfide resin is epoxy terminated substantially at one end of the polymer chain.
Claim 4
Dependent Claim
54 words
The sealant composition of claim 2 wherein the epoxy terminated polysulfide resin is the reaction product prepared by reacting a liquid polythiol polymer having a molecular weight of 500 to 4000 and vinyl cyclohexane diepoxide until about a 50% reduction in the percent thiol and epoxy functions in the reaction mixture has been obtained.
Claim 5
Dependent Claim
21 words
The sealant composition of claim 2 containing about 2.0 to about 10.0 parts by weight of liquid polysulfide polymer curing agent.
Claim 6
Dependent Claim
48 words
The sealant composition of claim 3 containing a. 100 parts by weight of curable liquid polysulfide polymer base, b. about 0.5 to about 5.0 parts by weight of epoxy terminated polysulfide resin, and c. about 2.0 to about 10.0 parts by weight of liquid polysulfide polymer curing agent.
Claim 7
Dependent Claim
30 words
The sealant composition of claim 5 wherein the epoxy terminated polysulfide resin is derived from a liquid polythiol polymer which is non-cross linked and has a molecular weight of 1000.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |