US4782099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of elastic, open-celled flexible polyurethane foams having increased compression hardness
Assignee: Bayer AG
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Filing: 1987-08-21
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Granted: 1988-11-01
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Expires: 2007-08-21
Abstract
Abstract Flexible polyurethane foams having increased compression hardness are produced by reacting an organic polyisocyanate with a mixture of polyols in the presence of a blowing agent and optionally known additives such as catalysts, emulsifiers, etc. The mixture of polyols is (1) 75-95 wt % polyether polyol with terminal OH groups having a functionality of from 2 to 4 and an OH number of from 25 to 60 and (2) 5-25 wt % polyether polyol having a functionality of at least six and an OH number of from 150 to 200 which is the reaction product of an alcohol having a functionality of at least six and propylene oxide which has been modified to contain 5-50 wt % terminal ethylene oxide groups. These foams are useful in furniture applications.
Inventors
- 👤 Manfred Dietrich
- 👤 Hans-Walter Illger
- 👤 Peter Vogtel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:07
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; Y; Y10; Y10S; Y10S521/00; Y10S521/914
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
136 words
A process for the production of elastic open-celled flexible polyurethane foams having substantially increased compression hardness in which (a) a polyisocyanate is reacted with (b) a polyol mixture of (1) 75-95 wt % polyether polyol with terminal OH groups having a functionality of from 2 to 4 and an OH number of from 25 to 60 and (2) 5-25 wt % of a polyether polyol having a functionality of at least six and an OH number of from 150 to 200 which is the reaction product of an alcohol having a functionality of at least six and propylene oxide that has been modified to contain 5-50 wt % terminal ethylene oxide groups based on total alkylene oxide in the presence of (c) a blowing agent and, optionally (d) a known catalyst, stabilizer and/or other known additive.
Claim 2
Dependent Claim
136 words
A process for the production of elastic open-celled flexible polyurethane foams having substantially increased compression hardness in which (a) a polyisocyanate is reacted with (b) a polyol mixture of (1) 75-95 wt % polyether polyol with terminal OH groups having a functionality of from 2 to 4 and an OH number of from 25 to 60 and (2) 5-25 wt % of a polyether polyol having a functionality of at least six and an OH number of from 150 to 200 which is the reaction product of an alcohol having a functionality of at least six and propylene oxide that has been modified to contain 5-50 wt % terminal ethylene oxide groups based on total alkylene oxide in the presence of (c) a blowing agent and, optionally (d) a known catalyst, stabilizer and/or other known additive.
Claim 3
Dependent Claim
16 words
The process of claim 1 in which polyether polyol (b)(1) is a filler containing polyether polyol.
Claim 4
Dependent Claim
18 words
The process of claim 1 in which polyether polyol (b)(1) is a polyether polyol containing secondary OH groups.
Claim 5
Dependent Claim
22 words
The process of claim 1 in which polyether polyol (b)(2) has been modified to contain 10-30 wt % terminal ethylene oxide groups.
Claim 6
Dependent Claim
13 words
The process of claim 1 in which polyisocyanate (a) is an aromatic polyisocyanate.
Claim 7
Dependent Claim
22 words
The process of claim 1 in which polyisocyanate (a) is tolylene diisocyanate containing 65 wt % 2,4-isomer and 35 wt % 2,6-isomer.
Claim 8
Dependent Claim
24 words
The process of claim 1 in which the alcohol having a functionality of at least six used to produce polyether polyol (b)(2) is sorbitol.
Claim 9
Dependent Claim
10 words
The polyurethane foam produced by the process of claim 1.
Claim 10
Dependent Claim
10 words
The polyurethane foam produced by the process of claim 2.
Claim 11
Dependent Claim
10 words
The polyurethane foam produced by the process of claim 3.
Claim 12
Dependent Claim
10 words
The polyurethane foam produced by the process of claim 6.
Claim 13
Dependent Claim
10 words
The polyurethane foam produced by the process of claim 7.
References Cited (Backward Citations)
US3433751A
Cited
GB1396105A
Cited
GB1415560A
Cited
US4211849A
Cited
US3931066A
Cited
DE3323872A1
Cited
EP0132302A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |