Patent US4132840A successfully refreshed from Google Patents.
US4132840A
Expired / Lapsed
US
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Process for coloring polyurethane foams
Assignee: Bayer AG
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Filing: 1976-07-09
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Granted: 1979-01-02
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Expires: 1996-07-09
Abstract
Abstract Polyurethane plastics are dyed with dyestuffs of the formula ##STR1## wherein R 1 denotes hydrogen, halogen, optionally substituted C 1 -C 4 -alkyl, optionally substituted C 1 -C 4 -alkoxy and optionally substituted C 1 -C 4 -alkylcarbonylamino and R 2 denotes hydrogen, optinally substituted C 1 -C 4 -alkyl and optionally substituted C 1 -C 4 -alkoxy, while A and B denote optionally branched alkylene chains which can be identical or different and preferably have 2 to 6 carbon atoms, with formation of covalent bonds, in that the dyestuffs are added before or during the polyaddition reaction to the reacton mixture of polyol and polyisocyanate or to one of the components.
Inventors
- 👤 Herbert Hugl
- 👤 Gerhard Wolfrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:31
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3838; C08G18/67; C08G18/675; C08G18/677; C08G18/678; Y; Y10; Y10S; Y10S521/00; Y10S521/919; Y10S521/92
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
61 words
Colored polyurethane foam of very good light-fastness having incorporated therein with covalent bond formation 0.005 to 0.2% based on the polyol component of a dyestuff of the formula ##STR5## wherein R 1 is hydrogen, methyl, ethyl, methoxy, ethoxy, chlorine, bromine or acetylamino; R 2 is hydrogen, methyl, ethyl, propyl, methoxy or ethoxy and; A and B are ethylene, trimethylene or tetramethylene.
Claim 2
Dependent Claim
61 words
Colored polyurethane foam of very good light-fastness having incorporated therein with covalent bond formation 0.005 to 0.2% based on the polyol component of a dyestuff of the formula ##STR5## wherein R 1 is hydrogen, methyl, ethyl, methoxy, ethoxy, chlorine, bromine or acetylamino; R 2 is hydrogen, methyl, ethyl, propyl, methoxy or ethoxy and; A and B are ethylene, trimethylene or tetramethylene.
Claim 3
Dependent Claim
20 words
Foam of claim 1 in which R 1 is methyl; R 2 is hydrogen, and A and B are ethylene.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |