US3880797A
Expired / Lapsed
US
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Process for preparing colored polyurethane
Assignee: Hodogaya Chemical Co Ltd
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Filing: 1973-08-10
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Granted: 1975-04-29
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Expires: 1993-08-10
Abstract
Abstract A colored polyurethane material is prepared by reacting a polyisocyanate compound and a polyhydroxyl compound with a complex metal dye which contains at least one amino group or a hydroxyl group with one active hydrogen atom whereby the polyurethane material is colored by the presence of the chemically bonded complex metal dye.
Inventors
- 👤 Shigeo Maeda
- 👤 Minoru Ozutsumi
- 👤 Isao Niimura
- 👤 Hideo Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:31
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/10; C09B69/106; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3897
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
A PROCESS FOR PREPARING A COLORED POLYURETHANE MATERIAL, WHICH COMPRISES: REACTING A POLYISOCYANATE COMPOUND AND A POLYHYDROXYL COMPOUND WITH A COPPER PHTHALOCYANINE DYE OF THE FORMULA
Claim 2
Dependent Claim
26 words
A PROCESS FOR PREPARING A COLORED POLYURETHANE MATERIAL, WHICH COMPRISES: REACTING A POLYISOCYANATE COMPOUND AND A POLYHYDROXYL COMPOUND WITH A COPPER PHTHALOCYANINE DYE OF THE FORMULA
Claim 3
Dependent Claim
31 words
The process of claim 1, wherein said phthalocyanine dye, said polyisocyanate and said polyhydroxyl compound are polymerized in an inert solvent which is inert to the isocyanate groups present in solution.
Claim 4
Dependent Claim
29 words
The process of claim 1, wherein said phthalocyanine is initially reacted with an excess amount of said polyisocyanate And then said polyhydroxyl compound is added to said reacted polyisocyanate.
Claim 5
Dependent Claim
41 words
The process of claim 1, wherein said phthalocyanine dye, said polyisocyanate and said polyhydroxyl compound are polymerized to form a prepolymer and then said prepolymer is reacted with a compound which contains an active hydrogen atom and a salt forming group.
Claim 6
Dependent Claim
16 words
The process of claim 1, wherein said polyisocyanate is a prepolymer which contains unreacted isocyanate groups.
Claim 7
Dependent Claim
19 words
The process of claim 1, wherein said polyhydroxyl compound is a polyol or a polyurethane containing unreacted hydroxyl groups.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |