Patent US3554968A successfully refreshed from Google Patents.
US3554968A
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US
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Storage-stable hot-curable compositions of polyepoxides and acyl substituted urea derivatives
Assignee: BASF Schweiz AG
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Filing: 1969-09-23
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Granted: 1971-01-12
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Expires: 1989-09-23
Abstract
Abstract HOT-CURABLE MOULDING, COATING AND ADHESIVE COMPOSITIONS WHICH ARE STORAGE-STABLE AT ROOM TEMPERATURE AND WHICH CONTAIN A POLYEPOXIDE COMPOUND, FOR EXAMPLE A LIQUID POLYGLYCIDYL ETHER OF BISPHENOL A AND, AS A LATENT CURING AGENT, A C2-C4-ACYLUREA, FOR EXAMPLE N-MONOACETYLUREA, N,N''-DIACETYLUREA OR N,N''-DIPROPIONYLUREA. AS A RULE 0.2-0.7 MOL OF ACETYLUREA ARE EMPLOYED PER EPOXIDE EQUIVALENT. IN ORDER TO OBTAIN PERFECT CASTINGS, THE CURE SHOULD BE CARRIED OUT STEPWISE BY GRADUAL WARMING, WITH THE MIXTURES BEING EXPOSED TO GRADUALLY RISING TEMPERATURES IN THE RANGE OF 100-180*C., AND THE TEMPERATURE MUST, ESPECIALLY IN THE RANGE OF 120-150*C., ONLY BE RAISED IN SMALL STEPS.
Inventors
- 👤 Juergen Habermeier
- 👤 Daniel Porret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:09
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |