US4870206A
Expired / Lapsed
US
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Aromatic polyisocyanates, their preparation and use as components for adhesives
Assignee: Bayer AG
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Filing: 1988-06-24
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Granted: 1989-09-26
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Expires: 2008-06-24
Abstract
Abstract New compounds containing isocyanatophenoxy groups, corresponding to ##STR1## wherein R 1 denotes a residue of a n-valent polyhydroxyl compound having a molecular weight of about 92-6000, R 2 denotes hydrogen or methyl group and n denotes an integer of from 3 to 8 were found to be suitable as hardeners in the preparation of adhesives.
Inventors
- 👤 Josef Sanders
- 👤 Rudolf Hombach
- 👤 Helmut Reiff
- 👤 Dieter Dieterich
- 👤 Manfred Dollhausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:52
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/67; C08G18/69; C08G18/70; C08G18/72; C08G18/77; C08G18/771; C09; C09J; C09J175/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
A compound containing isocyanatophenoxy groups having the formula: ##STR7## wherein R 1 denotes the residue obtained by removal of the hydroxyl groups from a n-valent polyhydroxyl compound having a molecular weight of about 92 to 6000, R 2 denotes a methyl radical or hydrogen and n denotes an integer from 3 to 8.
Claim 2
Dependent Claim
53 words
A compound containing isocyanatophenoxy groups having the formula: ##STR7## wherein R 1 denotes the residue obtained by removal of the hydroxyl groups from a n-valent polyhydroxyl compound having a molecular weight of about 92 to 6000, R 2 denotes a methyl radical or hydrogen and n denotes an integer from 3 to 8.
Claim 3
Dependent Claim
24 words
The compound of claim 1, wherein said molecular weight is about 92 to 400 and said n denotes an integer from 3 to 6.
Claim 4
Dependent Claim
14 words
The compound of claim 1 wherein said R 1 denotes an aliphatic hydrocarbon radical.
Claim 5
Dependent Claim
31 words
The compound of claim 1 wherein said R 2 denotes hydrogen and wherein the group R 1 O and the isocyanate group are in the ortho- or para-position to one another.
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) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |