Patent US3981828A successfully refreshed from Google Patents.
US3981828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible cellular polyurethane foam compositions having increased flame retardance
Assignee: BASF Corp
•
Filing: 1974-04-12
•
Granted: 1976-09-21
•
Expires: 1994-04-12
Abstract
Abstract Flexible cellular foam compositions are prepared by reacting in the presence of water an organic compound having at least two active hydrogen atoms with an organic polyisocyanate employing an isocyanate index of from about 130 to about 225 in the presence of a catalytically sufficient amount of certain isocyanate trimerization catalysts. The resulting foam compositions exhibit excellent flame retardant properties.
Inventors
- 👤 John G. Demou
- 👤 Louis C. Pizzini
- 👤 John T. Patton, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/09; C08G18/092; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/16; C08G18/161; C08G18/163; C08G18/18; C08G18/1816; C08G18/1833; C08G18/20; C08G18/2009; C08G18/2018; C08G18/2081; C08G18/22; C08G18/24; C08G18/244; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/4837; C08G18/4841; C08G18/74; C08G18/76; C08G18/7607; C08G18/7614; C08G18/7621; C08G18/7657; C08G18/7664; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0083; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S521/904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A flexible polyurethane foam prepared in the presence of water by the reaction of: a. a polyalkylene polyether polyol having an average equivalent weight of from 200 to 2500 with b. an organic polyisocyanate employing an isocyanate index of from 130 to 225 in the presence of from 0.05 part to 10 parts by weight per 100 parts of weight of said polyalkylene polyether polyol of an isocyanate trimerization catalyst selected from the group consisting of triethylene diamine, alkylene oxide-water adducts of triethylene diamine, triethylene diamine diformate, and N-benzyltrialkyl ammonium alkoxides and hydroxides.
Claim 2
Dependent Claim
93 words
A flexible polyurethane foam prepared in the presence of water by the reaction of: a. a polyalkylene polyether polyol having an average equivalent weight of from 200 to 2500 with b. an organic polyisocyanate employing an isocyanate index of from 130 to 225 in the presence of from 0.05 part to 10 parts by weight per 100 parts of weight of said polyalkylene polyether polyol of an isocyanate trimerization catalyst selected from the group consisting of triethylene diamine, alkylene oxide-water adducts of triethylene diamine, triethylene diamine diformate, and N-benzyltrialkyl ammonium alkoxides and hydroxides.
Claim 3
Dependent Claim
26 words
The foam of claim 1 wherein the polyalkylene polyether polyol is an alkylene oxide adduct of a polyhydric alcohol having from 2 to 6 hydroxyl groups.
Claim 4
Dependent Claim
10 words
The foam of claim 1 wherein (b) is toluene diisocyanate.
Claim 5
Dependent Claim
14 words
The foam of claim 1 prepared in the presence of an auxiliary urethane catalyst.
Claim 6
Dependent Claim
13 words
The foam of claim 1 prepared in the presence of a silicone surfactant.
Claim 7
Dependent Claim
11 words
The foam of claim 1 wherein the catalyst is triethylene diamine.
Claim 8
Dependent Claim
16 words
The foam of claim 1 wherein the catalyst is a propylene oxide-water adduct of triethylene diamine.
Claim 9
Dependent Claim
16 words
The foam of claim 1 wherein the catalyst is a propylene oxide adduct of triethylene diamine.
References Cited (Backward Citations)
US3226345A
Cited
US2939851A
Cited
GB908337A
Cited
US3030951A
Cited
US3471416A
Cited
GB1162517A
Cited
US3803064A
Cited
US3741917A
Cited
US3728291A
Cited
US3736272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |