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US4767795A
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Polyol composition and a process for the preparation of flame-resistant polyurethane foams therefrom
Assignee: Bayer AG
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Filing: 1987-06-17
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Granted: 1988-08-30
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Expires: 2007-06-17
Abstract
Abstract Flame resistant polyurethane foams are made by reacting a polyisocyanate with a specific polyol composition. This polyol composition is made up of (a) at least 10 wt. % of a polyether formed by the addition of alkylene oxide(s) to 2,3- and/or 3,4-tolylenediamine having an OH number of from 400 to 520, (b) at least 20-50 wt. % flame retardant containing phosphorus and/or halogen, (c) 5-10 wt. % chain lengthening or cross-linking agent, (d) surface active agents, (e) water and (f) 0-30 wt. % polyhydroxyl compound(s) other than (a) having a molecular weight of from 300 to 10,000.
Inventors
- 👤 Norbert Adam
- 👤 Reinhard Kaufung
- 👤 Rolf Wiedermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/6677; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08K; C08K5/00; C08K5/0008; C08K5/0066; C08G2110/00; C08G2110/0025
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 words
A polyol composition comprising: (a) at least 10 wt. % of a polyether having an OH number of from 400 to 520 containing at least two hydroxyl groups which is produced by adding an alkylene oxide to 2,3- and/or 3,4-tolylene diamine, (b) at least 20 wt. % flame retardant containing phosphorus and/or halogen, (c) 5-10 wt. % chain lengthening/crosslinking agent having at least two Zerewitinoff-active hydrogen atoms and a molecular weight of from 32 to 299, (d) 0.1 to 2.0 wt. % surface active agent, (e) 0 to 2 wt. % water and (f) 0 to 30 wt. % of a polyhydroxyl compound different from (a) having a molecular weight of from 300 to 10,000.
Claim 2
Dependent Claim
115 words
A polyol composition comprising: (a) at least 10 wt. % of a polyether having an OH number of from 400 to 520 containing at least two hydroxyl groups which is produced by adding an alkylene oxide to 2,3- and/or 3,4-tolylene diamine, (b) at least 20 wt. % flame retardant containing phosphorus and/or halogen, (c) 5-10 wt. % chain lengthening/crosslinking agent having at least two Zerewitinoff-active hydrogen atoms and a molecular weight of from 32 to 299, (d) 0.1 to 2.0 wt. % surface active agent, (e) 0 to 2 wt. % water and (f) 0 to 30 wt. % of a polyhydroxyl compound different from (a) having a molecular weight of from 300 to 10,000.
Claim 3
Dependent Claim
17 words
The composition of claim 1 in which polyether (a) constitutes 10-49 wt. % or the polyol composition.
Claim 4
Dependent Claim
17 words
The composition of claim 1 in which polyol (a) constitutes 15-40 wt. % of the polyol composition.
Claim 5
Dependent Claim
18 words
The composition of claim 1 in which flame retardant (b) constitutes 25-45 wt. % of the polyol composition.
Claim 6
Dependent Claim
25 words
The composition of claim 1 in which polyether (a) is produced by adding 10-90% ethylene oxide and 90-10% propylene oxide to 2,3- and/or 3,4-tolylene diamine.
Claim 7
Dependent Claim
25 words
The composition of claim 1 in which polyether (a) is produced by adding 20-80% ethylene oxide and 80-20% propylene oxide to 2,3- and/or 3,4-toluyene diamine.
Claim 8
Dependent Claim
18 words
The composition of claim 1 in which polyether (a) has an OH number of from 410 to 520.
Claim 9
Dependent Claim
18 words
The composition of claim 1 in which polyether (a) has an OH number of from 450 to 500.
Claim 10
Dependent Claim
47 words
A process for the production of a rigid flame-resistant polyurethane foam having a density of from 30 to 20 kg/m 3 comprising reacting the polyol composition of claim 1 with a polyisocyanate in quantities such that the isocyanate index is in the range of 105 to 145.
Claim 11
Dependent Claim
19 words
The process of claim 9 in which the reaction is carried out in the presence of a blowing agent.
Claim 12
Dependent Claim
12 words
The process of claim 10 in which the blowing agent is trichlorotrifluoroethane.
Claim 13
Dependent Claim
14 words
The process of claim 11 in which a filler is present during the reaction.
Claim 14
Dependent Claim
15 words
The process of claim 12 in which the filler is carbon black and/or aluminum powder.
Claim 15
Dependent Claim
17 words
The process of claim 9 in which carbon black and/or aluminum powder is present during the reaction.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |