Patent US3668171A successfully refreshed from Google Patents.
US3668171A
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Nylon compositions containing diisocyanate mold release agents
Assignee: Foster Grant Co Inc
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Filing: 1971-01-11
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Granted: 1972-06-06
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Expires: 1991-01-11
Abstract
Abstract The mold release properties of nylon compositions are significantly improved by incorporating about 0.01 to 5.0 parts per 100 parts of nylon of a hydrocarbon diisocyanate having about 25 to 50 carbon atoms in the hydrocarbon chain.
Inventors
- 👤 Willard M Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
The composition of claim 1 wherein said hydrocarbon diisocyanate is present in an amount of 0.10 to 2.0 parts per 100 parts of nylon.
Claim 2
Dependent Claim
20 words
The composition of claim 2 wherein the hydrocarbon portion of said hydrocarbon diisocyanate contains about 30 to 50 carbon atoms.
Claim 3
Dependent Claim
10 words
The composition of claim 3 wherein said nylon is polycaprolactam.
Claim 4
Dependent Claim
44 words
A nylon composition having improved adhesion resistance comprised of 0.01 to 5.0 percent based on the weight of nylon in the composition of a hydrocarbon diisocyanate having the structure O=C=N (R) N=C=O where R is a hydrocarbon radical having 30 to 50 carbon atoms.
Claim 5
Dependent Claim
15 words
The composition of claim 5 wherein R is a hydrocarbon radical containing 36 carbon atoms.
Claim 6
Dependent Claim
10 words
The composition of claim 6 wherein said nylon is polycaprolactam.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |