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US4597910A
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Bis-(4-isocyanatophenoxy)-alkanes and a process for the production thereof
Assignee: Bayer AG
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Filing: 1985-11-08
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Granted: 1986-07-01
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Expires: 2005-11-08
Abstract
Abstract Bis-(4-isocyanatophenoxy)-alkanes corresponding to the formula ##STR1## in which R represents a divalent, saturated aliphatic hydrocarbon radical having from 2 to 6 carbon atoms with at least two carbon atoms between the two ether oxygen atoms, and R' represents hydrogen or a methyl group with R' being the same on both rings, are produced by phosgenating the corresponding diamine or an adduct of the corresponding diamine. These diisocyanates are particularly useful in the production of isocyanate addition products having outstanding physical and mechanical properties.
Inventors
- 👤 Klaus Konig
- 👤 Peter Heitkamper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:47
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/37; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/771
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
52 words
A bis-(4-isocyanatophenoxy)-alkane corresponding to the formula ##STR6## in which R represents a divalent, saturated aliphatic hydrocarbon radical having from 2 to 6 carbon atoms with at least two carbon atoms between the two ether oxygen atoms and R' represents hydrogen or a methyl group with R' being the same on both rings.
Claim 2
Dependent Claim
52 words
A bis-(4-isocyanatophenoxy)-alkane corresponding to the formula ##STR6## in which R represents a divalent, saturated aliphatic hydrocarbon radical having from 2 to 6 carbon atoms with at least two carbon atoms between the two ether oxygen atoms and R' represents hydrogen or a methyl group with R' being the same on both rings.
Claim 3
Dependent Claim
15 words
The bis-(4-isocyanatophenoxy)-alkane of claim 1 in which R represents an ethylene, tetramethylene or hexamethylene radical.
Claim 4
Dependent Claim
10 words
The bis-(4-isocyanatophenoxy)-alkane of claim 2 in which R' represents hydrogen.
Claim 5
Dependent Claim
12 words
The bis-(4-isocyanatophenoxy)-alkane of claim 2 in which R' represents a methyl group.
Claim 6
Dependent Claim
10 words
The bis-(4-isocyanatophenoxy)-alkane of claim 1 in which R' represents hydrogen.
Claim 7
Dependent Claim
12 words
The bis-(4-isocyanatophenoxy)-alkane of claim 1 in which R' represents a methyl group.
Claim 8
Dependent Claim
16 words
The bis-(4-isocyanatophenoxy)-alkane of claim 1 in which R represents an ethylene radical and R' represents hydrogen.
Claim 9
Dependent Claim
18 words
The bis-(4-isocyanatophenoxy)-alkane of claim 1 in which R represents an ethylene radical and R' represents a methyl group.
References Cited (Backward Citations)
US4421870A
Cited
US4448946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |