US3998764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reducing flammability of polyurethane foams with phosphorus compounds
Assignee: Hoechst AG
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Filing: 1974-11-06
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Granted: 1976-12-21
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Expires: 1994-11-06
Abstract
Abstract Production of agents reducing the flammability of polyurethane moulding compositions. The agents are more particularly comprised of compounds of the following general formula (I) ##STR1## IN WHICH R stands for an alkylene radical having from 2 to 6 carbon atoms, which may be halogen-substituted, if desired, a --CH 2 --CH 2 --O--CH 2 --CH 2 -- radical, a phenylene radical or an alkyl- or halogenoalkyl-substituted diphenylene methane radical, R 1 and R 2 , respectively, stand for a hydrogen atom, an alkyl radical or a halogen-substituted alkyl radical having from 1 to 4 carbon atoms, x + y stand for a number between 0.1 and 3, and n stands for 1 or 2.
Inventors
- 👤 Hartfrid Vollmer
- 👤 Franz-Josef Dany
- 👤 Joachim Wortmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:22
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/04; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C07F9/093; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5075; C08G18/5081; C08G18/5084
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A process for making polyurethane moulding compositions of reduced flammability by subjecting an organic polyol and a flameproofing agent containing alcoholic OH-groups to condensation with equivalent quantities of an organic isocyanate compound, in the presence of activators, expanding agents and cell regulators, which comprises using as the flameproofing agent a compound of general formula (I) ##STR20## in which R represents phenylene, or alkyl- or halogen-alkyl-substituted diphenylene methane, R 1 and R 2 , respectively, stand for a hydrogen atom, an alkyl radical or a halogen-substituted alkyl radical having from 1 to 4 carbon atoms, x + y stand for a number between 0.1 and 3, and n stands for 1 or 2.
Claim 2
Dependent Claim
112 words
A process for making polyurethane moulding compositions of reduced flammability by subjecting an organic polyol and a flameproofing agent containing alcoholic OH-groups to condensation with equivalent quantities of an organic isocyanate compound, in the presence of activators, expanding agents and cell regulators, which comprises using as the flameproofing agent a compound of general formula (I) ##STR20## in which R represents phenylene, or alkyl- or halogen-alkyl-substituted diphenylene methane, R 1 and R 2 , respectively, stand for a hydrogen atom, an alkyl radical or a halogen-substituted alkyl radical having from 1 to 4 carbon atoms, x + y stand for a number between 0.1 and 3, and n stands for 1 or 2.
Claim 3
Dependent Claim
17 words
The process as claimed in claim 1, wherein R stands for a radical of the formula: ##STR21##
Claim 4
Dependent Claim
34 words
The process as claimed in claim 1, wherein the polyurethane moulding composition contains the flameproofing agent in a proportion within the range 3 and 40 weight %, based on the quantity of organic polyol.
Claim 5
Dependent Claim
22 words
The process as claimed in claim 3 wherein the proportion of flameproofing agent is within the range 5 and 15 weight %.
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) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |