US4122049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyurethane foam
Assignee: Bayer AG
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Filing: 1977-11-14
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Granted: 1978-10-24
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Expires: 1997-11-14
Abstract
Abstract The instant invention is directed to a process for the production of polyurethane foams wherein organic polyisocyanates are reacted with active hydrogen containing compounds, wherein either the polyisocyanate or the active hydrogen containing compound or both are used in the form of sedimenting, redispersible dispersions containing homogeneous i.e. non-foamed aminoplast /condensates as the dispersed phase.
Inventors
- 👤 Kuno Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12; C08G12/46; C08G18/00; C08G18/06; C08G18/70; C08J9/0095; C08J2375/00; C08J2375/04; C08J2461/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
In a process for the production of foams comprising reacting polyisocyanates with compounds containing at least two isocyanate-reactive hydrogen atoms and having molecular weights of from 400 to 10,000 in the presence of blowing agents, the improvement wherein the polyisocyanates and/or the compounds having at least two isocyanate-reactive hydrogen atoms and molecular weights of from 400 to 10,000 are in the form of sedimenting, redispersible dispersions containing homogeneous aminoplasts as disperse phase, said dispersions having a solids content of from 5 to 45%.
Claim 2
Dependent Claim
83 words
In a process for the production of foams comprising reacting polyisocyanates with compounds containing at least two isocyanate-reactive hydrogen atoms and having molecular weights of from 400 to 10,000 in the presence of blowing agents, the improvement wherein the polyisocyanates and/or the compounds having at least two isocyanate-reactive hydrogen atoms and molecular weights of from 400 to 10,000 are in the form of sedimenting, redispersible dispersions containing homogeneous aminoplasts as disperse phase, said dispersions having a solids content of from 5 to 45%.
Claim 3
Dependent Claim
32 words
The process of claim 1, wherein polyhydroxyl polyethers are used as the compounds containing at least two isocyanate reactive hydrogen atoms and having molecular weights in the range from 400 to 10,000.
Claim 4
Dependent Claim
35 words
A process as claimed in claim 1 wherein the aminoplast condensates contain up to 60% by weight based on the mixture as a whole, of finely divided polysilicas, titanium dioxide, antimony trioxide and/or aluminum silicates.
Claim 5
Dependent Claim
9 words
Foams obtainable by the process claimed in claim 1.
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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |