US4092275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane resins prepared from active hydrogen containing material which is a dispersion of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agents
Assignee: Bayer AG
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Filing: 1976-11-10
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Granted: 1978-05-30
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Expires: 1996-11-10
Abstract
Abstract The instant invention relates to the use of stable, relatively low viscosity dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agents in the preparation of polyurethane resins. The dispersions are made by a process which broadly comprises mixing an aqueous dispersion of an isocyanate-polyaddition product with a compound having at least two hydroxyl groups and having a boiling point about 100° C, and thereafter at least partially distilling off the water.
Inventors
- 👤 Artur Reischl
- 👤 Gert Jabs
- 👤 Werner Dietrich
- 👤 Alberto Carlos Gonzalez-Dorner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:50
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/28; C08G18/40; C08G18/409; C08J3/00; C08J3/02; C08J3/09; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
In a process for the preparation of a polyurethane resin comprising reacting a polyisocyanate with an active hydrogen containing material, the improvement wherein at least a portion of said active hydrogen containing material is a stable, relatively low viscosity dispersion of a polyisocyanate-polyaddition product prepared by a process comprising mixing an aqueous dispersion of a polyisocyanate-polyaddition product with a compound which has at least two hydroxyl groups and a boiling point above 100° C and at least partially distilling off the water.
Claim 2
Dependent Claim
82 words
In a process for the preparation of a polyurethane resin comprising reacting a polyisocyanate with an active hydrogen containing material, the improvement wherein at least a portion of said active hydrogen containing material is a stable, relatively low viscosity dispersion of a polyisocyanate-polyaddition product prepared by a process comprising mixing an aqueous dispersion of a polyisocyanate-polyaddition product with a compound which has at least two hydroxyl groups and a boiling point above 100° C and at least partially distilling off the water.
Claim 3
Dependent Claim
20 words
The process of claim 1, wherein said polyisocyanate-polyaddition product is selected from the group consisting of polyurethane, polyurea and polyhydrazodicarbonamide.
Claim 4
Dependent Claim
18 words
The process of claim 2, wherein said polyurethane resin is prepared in the presence of a blowing agent.
Claim 5
Dependent Claim
17 words
The process of claim 3, characterized in that ionic dispersions of polyurethanes, polyureas or polyhydrazodicarbonamides are used.
Claim 6
Dependent Claim
19 words
The process of claim 3, wherein prior to foaming, an aqueous polymer latex is added to the reaction mixture.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |