Patent US4569952A successfully refreshed from Google Patents.
US4569952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible polyurethane foams having improved load bearing characteristics and mixtures useful therein
Assignee: Bayer Corp
•
Filing: 1985-01-31
•
Granted: 1986-02-11
•
Expires: 2005-01-31
Abstract
Abstract The present invention is directed to a process for the production of a flexible polyurethane foam comprising reacting an organic polyisocyanate and a polyol, in the presence of a blowing agent, a catalyst, and a foam stabilizer, the improvement wherein a foam of increased load bearing is obtained by including in the reaction mixture from about 8 to about 25 parts by weight per 100 parts by weight of said polyol of a mixture comprising (a) from 30 to 100 percent by weight of an addition product of an alkylene oxide and an aromatic diamine, said addition product having an average hydroxyl functionality of at least 2.5 and as high as 6, and having an hydroxyl number of from about 150 to about 810 and containing no free amine hydrogen, and (b) from 0 to 70 percent by weight of an alkanolamine having at least one hydroxyl group and having at least two active hydrogens, wherein the hydroxyl number of the combination of the polyol, the mixture, and any other isocyanate-reactive components, excluding water, is from 25 to 300, said process further being characterized as being conducted in the absence of a tin catalyst.
Inventors
- 👤 David A. Radovich
- 👤 Alicia H. Keddie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:17
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6535; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G65/2621; C08G65/2627; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/0058; C08G2110/0083
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
188 words
In a process for the production of a flexible polyurethane foam comprising reacting an organic polyisocyanate and a polyol, in the presence of a blowing agent, a catalyst, and a foam stabilizer, the improvement wherein a foam of increased load bearing is obtained by including in the reaction mixture from about 8 to about 25 parts by weight per 100 parts by weight of said polyol of a mixture comprising (a) from 30 to 100 percent by weight of an addition product of an alkylene oxide and an aromatic diamine, said addition product having an average hydroxyl functionality of at least 2.5 and as high as 6, and having an hydroxyl number of from about 150 to about 810 and containing no free amine hydrogens, and (b) from 0 to 70 percent by weight of an alkanolamine having at least one hydroxyl group and having at least two active hydrogens, the hydroxyl number of the combination of said polyol, said mixture, and any other isocyanate-reactive components, excluding water, being from 25 to 200, said process further being characterized as being conducted in the absence of a tin catalyst.
Claim 2
Dependent Claim
188 words
In a process for the production of a flexible polyurethane foam comprising reacting an organic polyisocyanate and a polyol, in the presence of a blowing agent, a catalyst, and a foam stabilizer, the improvement wherein a foam of increased load bearing is obtained by including in the reaction mixture from about 8 to about 25 parts by weight per 100 parts by weight of said polyol of a mixture comprising (a) from 30 to 100 percent by weight of an addition product of an alkylene oxide and an aromatic diamine, said addition product having an average hydroxyl functionality of at least 2.5 and as high as 6, and having an hydroxyl number of from about 150 to about 810 and containing no free amine hydrogens, and (b) from 0 to 70 percent by weight of an alkanolamine having at least one hydroxyl group and having at least two active hydrogens, the hydroxyl number of the combination of said polyol, said mixture, and any other isocyanate-reactive components, excluding water, being from 25 to 200, said process further being characterized as being conducted in the absence of a tin catalyst.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the hydroxyl number of said combination is from about 60 to about 160.
Claim 4
Dependent Claim
31 words
The process of claim 1 wherein said mixture is added in an amount of from about 10 to about 20 parts by weight per 100 parts by weight of said polyol.
Claim 5
Dependent Claim
30 words
The process of claim 1 wherein said addition product has an average hydroxyl functionality of from 2.5 to 4 and an hydroxyl number of from about 350 to about 600.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein the weight ratio of (a) to (b) is from 10:1 to 1:2.
Claim 7
Dependent Claim
18 words
The process of claim 5 wherein the weight ratio of (a) to (b) is from 5:1 to 1:1.
Claim 8
Dependent Claim
76 words
A mixture comprising (a) an addition product of an alkylene oxide and an aromatic diamine, said addition product having an average hydroxyl functionality of from 2.5 to 4, and having an hydroxyl number of from about 150 to about 810 and containing no free amine hydrogens, and (b) an alkanolamine having at least one hydroxyl group and having at least two active hydrogens, the weight ratio of component (a) to component (b) being 10:1 to 1:2.
Claim 9
Dependent Claim
76 words
A mixture comprising (a) an addition product of an alkylene oxide and an aromatic diamine, said addition product having an average hydroxyl functionality of from 2.5 to 4, and having an hydroxyl number of from about 150 to about 810 and containing no free amine hydrogens, and (b) an alkanolamine having at least one hydroxyl group and having at least two active hydrogens, the weight ratio of component (a) to component (b) being 10:1 to 1:2.
Claim 10
Dependent Claim
14 words
The mixture of claim 7 wherein the weight ratio is from 5:1 to 1:1.
Claim 11
Dependent Claim
20 words
The mixture of claim 7 wherein said addition product has an hydroxyl number of from about 350 to about 600.
Claim 12
Dependent Claim
110 words
A blend comprising (a) an organic polyol, (b) from 30 to 100 percent by weight of an addition product of an alkylene oxide and an aromatic diamine, said addition product having an average hydroxyl functionality of at least 2.5 and as high as 6, and having an hydroxyl number of from about 150 to about 810 and containing no free amine hydrogens, and (c) from 0 to 70 percent by weight of an alkanolamine having at least one hydroxyl group and having at least two active hydrogens, the hydroxyl number of the combination of said polyol, said mixture and any other isocyanate-reactive components, excluding water, being from 25 to 200.
Claim 13
Dependent Claim
110 words
A blend comprising (a) an organic polyol, (b) from 30 to 100 percent by weight of an addition product of an alkylene oxide and an aromatic diamine, said addition product having an average hydroxyl functionality of at least 2.5 and as high as 6, and having an hydroxyl number of from about 150 to about 810 and containing no free amine hydrogens, and (c) from 0 to 70 percent by weight of an alkanolamine having at least one hydroxyl group and having at least two active hydrogens, the hydroxyl number of the combination of said polyol, said mixture and any other isocyanate-reactive components, excluding water, being from 25 to 200.
Claim 14
Dependent Claim
18 words
The blend of claim 10, wherein the hydroxyl number of said blend is from about 60 to 160.
References Cited (Backward Citations)
US3067148A
Cited
US3423344A
Cited
US3499009A
Cited
US3336245A
Cited
US3493525A
Cited
US3597371A
Cited
US4042537A
Cited
US3948825A
Cited
US4089835A
Cited
US4243759A
Cited
US4469822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |