Patent US4407981A successfully refreshed from Google Patents.
US4407981A
Expired / Lapsed
US
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Flame retardant mixture for polyurethanes
Assignee: Akzo America Inc
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Filing: 1982-02-16
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Granted: 1983-10-04
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Expires: 2002-02-16
Abstract
Abstract A composition comprises polyurethane, a two-component flame retardant system consisting of an additive first flame retardant containing organophosphorus, and a second flame retardant containing organochlorine or organobromine. The composition of the invention may be employed for polyurethane foams, especially rigid foams. Diminished combustibility for rigid foam is measured by a flame-spread index less than 75 and a smoke developed index less than 450 when subjected to ASTM Test E-84, Surface Burning Characteristics of Building Materials. Dimethyl methylphosphonate is a representative additive organophosphorus first flame retardant. Trichloroisopropyl alcohol is a representative second flame retardant containing organochlorine.
Inventors
- 👤 Alan M. Aaronson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:18
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/288; C08G18/2885; C08G18/30; C08G18/38; C08G18/3802; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5006; C08G18/62; C08G18/6212; C08K5/02; C08K5/10; C08K5/12; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08G2110/00; C08G2110/0025; C08G2150/00; C08G2150/60; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
35 words
A flame-retarded polyurethane composition comprising polyurethane, a two-component flame retardant system consisting of an additive first flame retardant containing dialkyl alkylphosphonate and a second flame retardant containing organochlorine or organobromine incorporated in a polyether polyol.
Claim 2
Dependent Claim
35 words
A flame-retarded polyurethane composition comprising polyurethane, a two-component flame retardant system consisting of an additive first flame retardant containing dialkyl alkylphosphonate and a second flame retardant containing organochlorine or organobromine incorporated in a polyether polyol.
Claim 3
Dependent Claim
20 words
The composition of claim 1 wherein the amount of phosphorus is between about 0.2 to about 4 percent by weight.
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein the amount of chlorine is between about 0.5 to about 25 percent by weight.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein the amount of bromine is between about 0.5 to about 15 percent by weight.
Claim 6
Dependent Claim
10 words
The composition of claim 1 in the form of foam.
Claim 7
Dependent Claim
12 words
The composition of claim 1 in the form of a rigid foam.
Claim 8
Dependent Claim
24 words
The composition of claim 1 wherein the first flame retardant is selected from the group consisting of diethyl ethylphosphate, dimethyl methylphosphonate, and diethyl methylphosphonate.
Claim 9
Dependent Claim
22 words
The composition of claim 1 wherein the second flame retardant is selected from the group consisting of trichloroisopropyl alcohol and dibromoneopentyl glycol.
Claim 10
Dependent Claim
65 words
A polyurethane foam composition having a flame spread index less than 75 and a smoke developed index less than 450 when subjected to ASTM Test E-84, Surface Burning Characteristics of Building Materials, comprising polyurethane, a two-component flame retardant system consisting essentially of an additive first flame retardant containing dialkyl alkylphosphonate, and a second flame retardant containing or organochlorine or organobromine incorporated in a polyether polyol.
Claim 11
Dependent Claim
65 words
A polyurethane foam composition having a flame spread index less than 75 and a smoke developed index less than 450 when subjected to ASTM Test E-84, Surface Burning Characteristics of Building Materials, comprising polyurethane, a two-component flame retardant system consisting essentially of an additive first flame retardant containing dialkyl alkylphosphonate, and a second flame retardant containing or organochlorine or organobromine incorporated in a polyether polyol.
Claim 12
Dependent Claim
36 words
A process for making a polyurethane foam comprising foaming a mixture of a polyol, a polyisocyanate, a first flame retardant containing dialkyl alkylphosphonate, and a second flame retardant containing organochlorine or organobromine in a polyether polyol.
Claim 13
Dependent Claim
36 words
A process for making a polyurethane foam comprising foaming a mixture of a polyol, a polyisocyanate, a first flame retardant containing dialkyl alkylphosphonate, and a second flame retardant containing organochlorine or organobromine in a polyether polyol.
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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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |