Patent US3625872A successfully refreshed from Google Patents.
US3625872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistive polyurethane foam composition
Assignee: Nisshinbo Holdings Inc
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Filing: 1968-06-13
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Granted: 1971-12-07
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Expires: 1988-06-13
Abstract
Abstract This invention relates to flame-resistive, nonflammable foam compositions comprising a flame-resistive organic foam material and an inorganic filler. The flame-resistive organic foam material is produced by using an aromatic polyisocyanate having no ortho substituent, an active hydrogen-containing compound, a foaming agent and a catalyst and the inorganic filler is graphite, talc, or inorganic fiber or the like. The flameresistive foam compositions are used as insulators for walls, chemical plants and tanks for storing a liquefied natural gas and other apparatus.
Inventors
- 👤 Kaneyoshi Ashida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:25
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/09; C08G18/092; C08K; C08K3/00; C08K3/01; C08K3/016; C08K3/02; C08K3/04; C08K7/00; C08K7/02; C08K7/04; C08K7/22; C08K7/24; C08K7/26; C08J2379/00; Y; Y10; Y10S; Y10S521/00; Y10S521/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A foam composition according to claim 1, in which said foam material also includes (E) at least one surfactant, and (F) at least one flame retardant, and in which said (A, (B), (C), (D), (E), and (F) are present in such amount so as to satisfy (I) Ae/(Be+Ce+De+Ee+Fe)>2 wherein e represents the number of chemical equivalents of each of the components, and Ce is equal to zero when component C does not react with an -NCO group, De is equal to zero when component D does not react with an -NCO group, Ee is equal to zero when component E does not react with an -NCO group, and Fe is equal to zero when component F does not react with an -NCO group.
Claim 2
Dependent Claim
19 words
A foam composition according to claim 1 wherein the equivalent ratio represented by relationship (I) is 3 to 10.
Claim 3
Dependent Claim
14 words
A foam composition according to claim 1, wherein said inorganic filler is graphite powder.
Claim 4
Dependent Claim
14 words
A foam composition according to claim 1, wherein said inorganic filler is talc powder.
Claim 5
Dependent Claim
14 words
A foam composition according to claim 1, wherein said inorganic filler is inorganic fiber.
Claim 6
Dependent Claim
101 words
A foam composition as defined in claim 1 in which said foam material also includes (F) at least one flame-retardant and in which said (A), (B), (C), (D), and (F) are present in such amount so as to satisfy (I) Ae/(Be+Ce+De+Fe)>2 wherein e represents the number of chemical equivalents of each of the components and Ce is equal to zero when component C does not react with an -NCO group, De is equal to zero when component D does not react with an -NCO group, and Fe is equal to zero when component F does not react with an -NCO group.
Claim 7
Dependent Claim
19 words
A foam composition as defined in claim 1 in which the active hydrogen-containing compound is a sucrose-based polyether polyol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |