US3725319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low smoke generating plastic compositions
Assignee: Owens Corning
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Filing: 1972-03-28
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Granted: 1973-04-03
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Expires: 1992-03-28
Abstract
Abstract This disclosure concerns isocyanurate-urethane plastic compositions having low smoke generating properties under fire conditions. Reduction of smoke generation is achieved by the addition to the plastic compositions of an alkali metal fluoroborate or ammonium fluoroborate or mixtures thereof.
Inventors
- 👤 K Frisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/09; C08G18/092; C08K; C08K3/00; C08K3/38; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S521/903
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
The composition of claim 1 further characterized by 5 to 25 percent of said compounds having reactive -NCO groups reacting with said compounds having reactive -OH groups to form urethane linkages, thereby leaving 75 to 95 percent of said compounds having reactive -NCO groups to trimerize and form isocyanurate rings.
Claim 2
Dependent Claim
15 words
The composition of claim 1 wherein said smoke reducing agent is an alkali metal fluoroborate.
Claim 3
Dependent Claim
14 words
The composition of claim 3 wherein said alkali metal fluoroborate is potassium fluoroborate, KBF4.
Claim 4
Dependent Claim
27 words
The composition of claim 1 wherein said smoke reducing agent is employed in an amount equal to 5 to 20 percent by weight of said composition solids.
Claim 5
Dependent Claim
93 words
A thermal insulating, foamed plastic isocyanurate-urethane product formed by reacting, in an NCO/OH ratio of 4 to 1 to 20 to 1 and in the presence of an -NCO trimerization catalyst, one or more compounds having reactive -NCO groups with one or more polyols having reactive -OH groups; said isocyanurate-urethane product containing a smoke reducing agent selected from the group consisting of an alkali metal fluoroborate, ammonium fluoroborate and mixtures thereof; said smoke reducing agent being employed in an amount equal to 0.1 to 30 percent by weight of said isocyanurate-urethane product solids.
Claim 6
Dependent Claim
14 words
The product of claim 6 wherein said smoke reducing agent is potassium fluoroborate, KBF4.
References Cited (Backward Citations)
US3549564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |