Patent US4568729A successfully refreshed from Google Patents.
US4568729A
Expired / Lapsed
US
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Process for the preparation of urea condensates and their use
Assignee: BASF SE
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Filing: 1983-10-31
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Granted: 1986-02-04
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Expires: 2003-10-31
Abstract
Abstract The present invention relates to a process for the preparation of urea condensates and to their use. To prepare these urea condensates, a primary di and/or polyamine is reacted with urea, a secondary monoamine and if appropriate a polyalcohol at elevated temperatures in the presence or absence of catalysts, and the ammonia formed is separated off. These urea condensates are suitable as binder components in thermosetting surface coatings.
Inventors
- 👤 Eberhard Schupp
- 👤 Werner Loch
- 👤 Rolf Osterloh
- 👤 Klaas Ahlers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:16
CPC Classifications
C; C08; C08G; C08G71/00; Y; Y10; Y10S; Y10S524/00; Y10S524/901; Y10S524/904; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
ess of claim 5. 20. Urea condensates produced by the process of claim 6.
Claim 2
Dependent Claim
83 words
Urea condensates produced by the process of claim 7. 22. A binder for thermosetting surface coatings, comprising from 50 to 98% by weight of a self-cros-linking surface coating binder which consists essentially of at least one polyadduct, polycondensate or polymer, each having a mean molecular weight M n of from 500 to 10,000 and possessing, on average, at least two functional groups selected from OH groups and primary and secondary amino groups, and from 2 to 50% by weight of a urea condensate
Claim 3
Dependent Claim
84 words
prepared by the process of claim 5. 23. A binder for thermosetting surface coatings, comprising from 40 to 90% by weight of a nonself-crosslinking surface coating binder which consists essentially of at least one polyadduct, polycondensate or polymer, each having a mean molecular weight M n of from 500 to 10,000 and possessing, on average, at least two functional groups selected from OH groups and primary and secondary amino groups, and from 10 to 60% by weight of a urea condensate prepared by the
Claim 4
Dependent Claim
66 words
process of claim 5. 24. The process of claim 5 wherein the ratio of the number of equivalents of NH 2 groups of the primary di- or polyamine or mixture of di- and polyamines (A) to NH 2 groups of the urea (B) to NH groups of the secondary monoamine (C) to OH groups of the polyalcohol (D) is 1 to 1.2-2.4 to 0.2-20 to 0-0.9.
References Cited (Backward Citations)
DE2419179A1
Cited
US4104147A
Cited
US4178427A
Cited
DE2942488A1
Cited
DE3021300A1
Cited
DE3121765A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |