US5300535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing polyurethane flexible foam
Assignee: AGC Inc
•
Filing: 1991-02-22
•
Granted: 1994-04-05
•
Expires: 2011-02-22
Abstract
Abstract A method for producing a polyurethane flexible foam, which comprises reacting at least one high molecular weight polyol selected from the group consisting of a polyoxyalkylene polyol having a hydroxyl value of from 5 to 38 mgKOH/g, from 2 to 8 hydroxyl groups and a total unsaturation degree of not more than 0.07 meq/g and a polymer-dispersed polyol containing said polyoxyalkylene polyol as the matrix, an optional crosslinking agent and a polyisocyanate compound in the presence of a low viscosity compound having an addition-polymerizable unsaturated group, a catalyst, a foaming agent and a foam stabilizer.
Inventors
- 👤 Hiromitsu Takeyasu
- 👤 Sigeyuki Kozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:38
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/637; C08G18/48; C08G18/4833; C08G18/4837; C08G18/4866; C08G18/67; C08G18/671; C08G18/672; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0083
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
146 words
A method for producing a polyurethane flexible foam, which comprises reacting at least one high molecular weight polyol selected from the group consisting of a polyoxyalkylene polyol having a hydroxyl value of from 5 to 38 mgKOH/g, from 2 to 8 hydroxyl groups and a total unsaturation degree of not more than 0.7 meq/g and a polymer dispersed polyol containing said polyoxyalkylene polyol as the matrix, an optional cross-linking agent and a polyisocyanate compound in the presence of from 1 to 40 parts by weight, to 100 parts by weight of said high molecular weight polyol, of a low viscosity compound having a viscosity not higher than 300 cP at 25° C. and lower than the viscosity of said polyoxyalkylene polyol and having an addition-polymerizable unsaturated group but not an active hydrogen reactive with an isocyanate group, a catalyst, a foaming agent and a foam stabilizer.
Claim 2
Independent Claim
146 words
A method for producing a polyurethane flexible foam, which comprises reacting at least one high molecular weight polyol selected from the group consisting of a polyoxyalkylene polyol having a hydroxyl value of from 5 to 38 mgKOH/g, from 2 to 8 hydroxyl groups and a total unsaturation degree of not more than 0.7 meq/g and a polymer dispersed polyol containing said polyoxyalkylene polyol as the matrix, an optional cross-linking agent and a polyisocyanate compound in the presence of from 1 to 40 parts by weight, to 100 parts by weight of said high molecular weight polyol, of a low viscosity compound having a viscosity not higher than 300 cP at 25° C. and lower than the viscosity of said polyoxyalkylene polyol and having an addition-polymerizable unsaturated group but not an active hydrogen reactive with an isocyanate group, a catalyst, a foaming agent and a foam stabilizer.
Claim 3
Dependent Claim
48 words
The method according to claim 1, wherein the low viscosity compound having an addition-polymerizable unsaturated group is at least one compound selected from the group consisting of alkoxypoly(or mono) ethylene glycol methacrylate, poly(or mono) ethylene glycol dimethacrylate, alkoxypoly(or mono) propylene glycol methacrylate and poly(or mono) propylene glycol dimethacrylate.
Claim 4
Dependent Claim
37 words
The method according to claim 1, wherein the polyoxyalkylene polyol has a hydroxyl value (X) (mgKOH/g) and a total unsaturation degree (Y) (meq/g) in the relation of Y≦0.9/(X-10) for values of X from about 32.5 to 38.
Claim 5
Dependent Claim
33 words
The method according to claim 1, wherein the polyoxyalkylene polyol has a hydroxyl value (X) of from 5 to 35 mgKOH/g and a total unsaturation degree (Y) of not more than 0.04 meq/g.
Claim 6
Dependent Claim
30 words
The method according to claim 1, wherein the polyoxyalkylene polyol is a polyoxyalkylene polyol having an oxypropylene group content of at least 70% by weight and optionally containing oxyethylene groups.
Claim 7
Dependent Claim
24 words
The method according to claim 5, wherein the polyoxyalkylene polyol is a polyoxyalkylene polyol containing at least 5% by weight of terminal oxyethylene groups.
Claim 8
Dependent Claim
31 words
The method according to claim 1, wherein the polyisocyanate compound is at least one compound selected from the group consisting of tolylene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenylisocyanate and modified products thereof.
Claim 9
Dependent Claim
46 words
The method according to claim 1, wherein a crosslinking agent having at least two isocyanate-reactive groups and having a molecular weight of not higher than 600 per isocyanate-reactive group is used, in addition to a polyoxyalkylene polyol having a hydroxyl value of from 5 to 38.
Claim 10
Dependent Claim
31 words
The method of claim 1 wherein the viscosity of the low viscosity compound is not higher than 100 cP at 25° C. and lower than the viscosity of the polyoxyalkylene polyol.
Claim 11
Dependent Claim
12 words
A polyurethane flexible foam produced by the method according to claim 1.
Claim 12
Dependent Claim
39 words
The polyurethane flexible foam according to claim 10, having a 6 Hz transmittance of not more than 0.5, an impact resiliency of core of at least 80% and a wet heat compression permanent strain of not more than 10%.
References Cited (Backward Citations)
US28715A
Cited
US3075926A
Cited
USRE28715E
Cited
US4439548A
Cited
US3884848A
Cited
US4107101A
Cited
US4098733A
Cited
US4049590A
Cited
US4125487A
Cited
EP0008444A2
Cited
US4230823A
Cited
US4366301A
Cited
US4332716A
Cited
US4482582A
Cited
US4493908A
Cited
US4568705A
Cited
US4689357A
Cited
US4701474A
Cited
US4725629A
Cited
US4826882A
Cited
EP0394487A1
Cited
US5081180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |