US4868268A
Expired / Lapsed
US
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Process for preparing polyurethanes from an organic diisocyanate ester
Assignee: Bayer AG
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Filing: 1988-11-03
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Granted: 1989-09-19
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Expires: 2008-11-03
Abstract
Abstract Novel polyurethanes are prepared by reacting (a) an organic diisocyanate of formula ##STR1## wherein M represents --CH═CH--; --N═N--; --CH═N--; ##STR2## or and where R 1 through R 4 may be the same or different and represent hydrogen, halogen, CN, CF 3 or saturated aliphatic C 1 -C 12 alkyl residues which may be interrupted by ether hydrogen atoms with (b) compounds of molecular weights of from between 400 and 10,000 and which contain at least two active hydrogen atoms reactive toward isocyanate groups.
Inventors
- 👤 Hanns P. Muller
- 👤 Roland Gipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:21
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/771; C08G18/78; C08G18/7856; C08G18/7862; C08G18/81; C08G18/8125
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A process for preparing polyurethanes by reacting (a) an organic diisocyanate of the formula ##STR9## wherein M represents ##STR10## and where R 1 through R 4 are the same or different and represent hydrogen, halogen, CN, CF 3 , saturated aliphatic C 1 -C 12 alkyl residues, or C 1 -C 12 alkyl residues interrupted by ether oxygen atoms, with (b) compounds having molecular weights of from between 400 and 10,000 and containing at least two active hydrogen atoms reactive toward isocyanate groups.
Claim 2
Dependent Claim
83 words
A process for preparing polyurethanes by reacting (a) an organic diisocyanate of the formula ##STR9## wherein M represents ##STR10## and where R 1 through R 4 are the same or different and represent hydrogen, halogen, CN, CF 3 , saturated aliphatic C 1 -C 12 alkyl residues, or C 1 -C 12 alkyl residues interrupted by ether oxygen atoms, with (b) compounds having molecular weights of from between 400 and 10,000 and containing at least two active hydrogen atoms reactive toward isocyanate groups.
Claim 3
Dependent Claim
15 words
The process of claim 1, wherein R 1 through R 4 represent hydrogen or methyl.
Claim 4
Dependent Claim
47 words
The process of claim 1, further comprising (c) compounds having molecular weights between 18 and 399 and containing at least two hydrogen atoms reactive with isocyanate groups, and (d) compounds having molecular weights of from 32 to 500 and containing one hydrogen atom reactive toward isocyanate groups.
Claim 5
Dependent Claim
57 words
The process of claim 3, characterized in that in the first stage the diisocyanate component (a) is reacted with at least a portion of component (b) or with at least a portion each of components (b) and (c) into an NCO-prepolymer which is thereafter reacted with any remaining portion of components (b) or (c) or component (d).
Claim 6
Dependent Claim
48 words
The process of claim 4, characterized in that the diisocyanate component (a) is dissolved in solvent and is reacted into the prepolymer in a first stage with the component (b) at a temperature of from 20 to 220° C. in a molar ratio of from 1.2:1 or 4:1.
Claim 7
Dependent Claim
23 words
The process of claim 5, characterized in that the diisocyanate component (a) is reacted with the component (b) in a polyester-based PVC plasticizer.
Claim 8
Dependent Claim
21 words
The process of claim 4, characterized in that component (d) is in the form of low-molecular, monofunctional alcohols, amines or thiols.
Claim 9
Dependent Claim
9 words
A polyurethane made by the process of claim 1.
References Cited (Backward Citations)
US3014894A
Cited
US3095399A
Cited
US3180883A
Cited
GB934458A
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US3644289A
Cited
US4086211A
Cited
US4201852A
Cited
US4174434A
Cited
US4762901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |