Patent US4371629A successfully refreshed from Google Patents.
US4371629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a semiflexible energy management polyether polyurethane foam using as a crosslinker-surfactant an ethylene oxide adduct of a Mannich condensate prepared from the reaction of nonyl phenol, diethanolamine and formaldehyde
Assignee: Dow Chemical Co
•
Filing: 1981-09-17
•
Granted: 1983-02-01
•
Expires: 2001-09-17
Abstract
Abstract The incorporation of a crosslinker comprising an ethylene oxide adduct of a Mannich condensate of nonyl phenol, diethanolamine and formaldehyde in molded polyurethane semiflexible foams is disclosed. Semiflexible polyurethane foams incorporating this crosslinker result in foams which offer many advantages including a significant improvement in moldability characteristics and materials utilization as well as other advantages. These improvements are demonstrable over similar formulations using other crosslinkers. The resulting foams find use in energy absorbing applications in the automotive industry and other industries.
Inventors
- 👤 Thomas H. Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:56
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08G2110/00; C08G2110/0016; C08G2110/0033; C08G2110/0083
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
34 words
In a method for preparing a molded flexible polyurethane product wherein a polyol, a polyisocyanate, water and a crosslinker are reacted in a closable mold to form the polyurethane product the improvement which comprises
Claim 2
Dependent Claim
34 words
In a method for preparing a molded flexible polyurethane product wherein a polyol, a polyisocyanate, water and a crosslinker are reacted in a closable mold to form the polyurethane product the improvement which comprises
Claim 3
Dependent Claim
22 words
using a crosslinker comprising an ethylene oxide adduct of a Mannich condensate prepared from the reaction of nonyl phenol, diethanolamine and formaldehyde.
Claim 4
Dependent Claim
22 words
using a crosslinker comprising an ethylene oxide adduct of a Mannich condensate prepared from the reaction of nonyl phenol, diethanolamine and formaldehyde.
Claim 5
Dependent Claim
20 words
A method as in claim 1 wherein the crosslinker has a hydroxyl number ranging from about 230 to about 500.
Claim 6
Dependent Claim
19 words
A method as in claim 1 wherein the crosslinker has a hydroxyl number ranging from about 470 to 480.
Claim 7
Dependent Claim
23 words
A method as in claim 1 wherein the polyol is an alkylene oxide adduct of an initiator having both diol and triol components.
Claim 8
Dependent Claim
29 words
A method as in claim 3 wherein the polyol is terminated by at least 80% primary hydroxyl groups and has an equivalent weight ranging from about 1600 to 2000.
Claim 9
Dependent Claim
14 words
A method as in claim 1 wherein the polyisocyanate is a polymethylene polyphenyl polyisocyanate.
Claim 10
Independent Claim
43 words
A method for preparing a molded flexible polyurethane product comprising reacting in a closable mold a polyol, a polyisocyanate, water and a crosslinker which comprises an ethylene oxide adduct of a Mannich condensate prepared from the reaction of nonyl phenol, diethanolamine and formaldehyde.
Claim 11
Independent Claim
43 words
A method for preparing a molded flexible polyurethane product comprising reacting in a closable mold a polyol, a polyisocyanate, water and a crosslinker which comprises an ethylene oxide adduct of a Mannich condensate prepared from the reaction of nonyl phenol, diethanolamine and formaldehyde.
Claim 12
Dependent Claim
20 words
A method as in claim 6 wherein the crosslinker has a hydroxyl number ranging from about 230 to about 500.
Claim 13
Dependent Claim
19 words
A method as in claim 6 wherein the crosslinker has a hydroxyl number ranging from about 470 to 480.
Claim 14
Dependent Claim
23 words
A method as in claim 8 wherein the polyol is an alkylene oxide adduct of an initiator having both diol and triol components.
Claim 15
Dependent Claim
29 words
A method as in claim 6 wherein the polyol is terminated by at least 80% primary hydroxyl groups and has an equivalent weight ranging from about 1600 to 2000.
Claim 16
Dependent Claim
15 words
A method as in claim 1 wherein a low molecular weight diol is also present.
Claim 17
Independent Claim
79 words
A method for preparing a molded flexible polyurethane product comprising reacting in a closable mold a polyol which is alkylene oxide adduct of an initiator having both diol and triol components said polyol having a primary hydroxyl content of at least 80%, a polymethylene polyphenyl polyisocyanate, water and a crosslinker which comprises an ethylene oxide adduct of a Mannich condensate prepared from nonyl phenol, diethanolamine and formaldehyde said crosslinker having a hydroxyl number ranging from about 230 to 500.
Claim 18
Independent Claim
79 words
A method for preparing a molded flexible polyurethane product comprising reacting in a closable mold a polyol which is alkylene oxide adduct of an initiator having both diol and triol components said polyol having a primary hydroxyl content of at least 80%, a polymethylene polyphenyl polyisocyanate, water and a crosslinker which comprises an ethylene oxide adduct of a Mannich condensate prepared from nonyl phenol, diethanolamine and formaldehyde said crosslinker having a hydroxyl number ranging from about 230 to 500.
Claim 19
Dependent Claim
15 words
A method as in claim 13 wherein a low molecular weight diol is also present.
Claim 20
Dependent Claim
22 words
A method as in claim 13 wherein a catalyst is present, said catalyst comprising a two mole propylene oxide adduct of dimethylaminopropylamine.
References Cited (Backward Citations)
US2998452A
Cited
US4137265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |