US4194068A
Expired / Lapsed
US
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Flame retardant composition for polyurethane comprising bromohydrin of pentaerythritol and an organophosphorus compound
Assignee: Albemarle Corp
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Filing: 1978-03-21
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Granted: 1980-03-18
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Expires: 1998-03-21
Abstract
Abstract Liquid flame-retardants for polyurethane compositions are disclosed. The liquid flame-retardants contain a mixture of a bromohydrin of pentaerythritol, a polyhydric alcohol, and a sufficient amount of a flame-retardant organo-phosphorus compound to render the mixture a substantially solids-free liquid at 25° C., one atmosphere pressure. Illustrative of these flame-retardants is a solution of 2,2-bis(bromomethyl)-1,3-propanediol, a cyclic phosphonate ester of the formula ##STR1## where x=0 or 1, and a poly(oxypropylene) adduct of glycerol having an average molecular weight of about 300.
Inventors
- 👤 Dennis P. Miller
- 👤 Masahiko Tamaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3802; C08G18/3804; C08G18/3806; C08G18/381; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
54 words
A flame-retardant comprising a mixture of at least about 46 percent by weight of a bromohydrin of pentaerythritol, from about 5 to about 45 percent by weight of a polyhydric alcohol and a sufficient amount of a flame-retardant organo-phosphorus compound to render said mixture a substantially solids-free liquid at 25° C., one atmosphere pressure.
Claim 2
Dependent Claim
54 words
A flame-retardant comprising a mixture of at least about 46 percent by weight of a bromohydrin of pentaerythritol, from about 5 to about 45 percent by weight of a polyhydric alcohol and a sufficient amount of a flame-retardant organo-phosphorus compound to render said mixture a substantially solids-free liquid at 25° C., one atmosphere pressure.
Claim 3
Dependent Claim
51 words
A flame-retardant of claim 1 comprising a mixture of from about 46 to about 65 percent by weight of a bromohydrin of pentaerythritol, from about 5 to about 45 percent by weight of a polyhydric alcohol, and from about 10 to about 49 percent by weight of a flame-retardant organo-phosphorus compound.
Claim 4
Dependent Claim
51 words
A flame-retardant of claim 1 comprising a mixture of from about 46 to about 55 percent by weight of a bromohydrin of pentaerythritol, from about 5 to about 45 percent by weight of a polyhydric alcohol, and from about 10 to about 49 percent by weight of a flame-retardant organo-phosphorus compound.
Claim 5
Dependent Claim
23 words
The flame-retardant of claim 1 wherein the bromohydrin of pentaerythritol is selected from the group consisting of 2-bromomethyl-2-hydroxymethyl-1,3-propanediol, 2,2-bis(bromomethyl)-1,3-propanediol, 3-bromo-2,2-bis(bromomethyl)propanol, and mixtures thereof.
Claim 6
Dependent Claim
51 words
The flame-retardant of claim 1 wherein the organo-phosphorus compound is selected from the group consisting of tris(2,3-dibromopropyl)phosphate, tris(2,3-dichloropropyl)phosphate, dimethyl methyl phosphonate, tris(β-chloroethyl)phosphate, triethyl phosphate, triphenyl phosphate, tris(β-chloropropyl)phosphate, tetrakis(2-chloroethyl)ethylene diphosphate, diethyl[bis(2-hydroxyethyl)amino] methane phosphonate, compounds of the formula: ##STR8## where x=0 or 1, ##STR9## where n is a positive integer and mixtures thereof.
Claim 7
Dependent Claim
32 words
The flame-retardant of claim 1 wherein the polyhydric alcohol has from about 2 to about 8 hydroxy groups per molecule and has a molecular weight of from about 200 to about 5,000.
Claim 8
Dependent Claim
51 words
A flame-retardant of claim 1 comprising a mixture of from about 46 to about 55 percent by weight of a bromohydrin of pentaerythritol, from about 12 to about 16 percent by weight of a flame-retardant organo-phosphorus compound and from about 35 to about 43 percent by weight of a polyhydric alcohol.
Claim 9
Dependent Claim
48 words
In a process for producing flame-retardant polyurethanes by reacting at least one polyfunctional isocyanate, one or more polyfunctional hydroxy compounds, and a flame-retardant agent, the improvement comprising introducing the flame-retardant agent into the reaction in the form of a substantially solids-free liquid having the composition of claim 1.
Claim 10
Dependent Claim
33 words
A flame-retardant polyurethane composition comprising (a) the reaction product of at least one polyfunctional organic isocyanate, one or more polyfunctional hydroxy compounds and, (b) a flame-retardant amount of a flame-retardant of claim 1.
Claim 11
Dependent Claim
25 words
The composition of claim 9 containing from about 1 to about 15 percent by weight of each of the bromohydrin component and the organo-phosphorus component.
Claim 12
Dependent Claim
12 words
The composition of claim 9 wherein the polyurethane is a cellular foam.
Claim 13
Dependent Claim
14 words
The composition of claim 11 wherein polyurethane cellular foam is a rigid cellular foam.
Claim 14
Independent Claim
58 words
A method of preparing a flame-retardant mixture comprising blending at least about 46 percent by weight of a bromohydrin of pentaerythritol with from about 5 to about 45 percent by weight of a polyhydric alcohol, and a sufficient amount of a flame-retardant organo-phosphorus compound to render said mixture a substantially solids-free liquid at 25° C., one atmosphere pressure.
Claim 15
Independent Claim
58 words
A method of preparing a flame-retardant mixture comprising blending at least about 46 percent by weight of a bromohydrin of pentaerythritol with from about 5 to about 45 percent by weight of a polyhydric alcohol, and a sufficient amount of a flame-retardant organo-phosphorus compound to render said mixture a substantially solids-free liquid at 25° C., one atmosphere pressure.
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) | 1983-03-18 | 1983-09-17 | 1984-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-18 | 1987-09-17 | 1988-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-18 | 1991-09-17 | 1992-03-18 | $7700.00 | Window Closed / Lapsed |