US4045378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of hydroquinone in polyurethane foams containing halogenated phosphate polyester additives
Assignee: Olin Corp
•
Filing: 1976-09-29
•
Granted: 1977-08-30
•
Expires: 1996-09-29
Abstract
Abstract Use of hydroquinone as a scorch inhibitor in polyurethane foams containing halogenated phosphate polyester additives.
Inventors
- 👤 Clifford J. Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0023; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/49; C08K5/51; C08K5/52; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
109 words
In a method of making polyurethane foam which has reduced combustibility characteristics wherein the polyurethane foam formulation contains a halogenated phosphate polyester additive having the formula ##STR3## wherein R is an aliphatic hydrocarbon having 1-8 atoms or an aromatic hydrocarbon radical having 6-14 carbon atoms, X is a halogen selected from chlorine, bromine and a mixture thereof, a is an integer of 0-4, n is an integer of 2-6, and each R' is a haloalkyl radical having 1-8 carbon atoms, the halogen in this radical being chlorine, bromine or a mixture thereof, wherein the improvement comprises: adding an effective amount of hydroquinone to inhibit scorching in said foam formulation.
Claim 2
Dependent Claim
109 words
In a method of making polyurethane foam which has reduced combustibility characteristics wherein the polyurethane foam formulation contains a halogenated phosphate polyester additive having the formula ##STR3## wherein R is an aliphatic hydrocarbon having 1-8 atoms or an aromatic hydrocarbon radical having 6-14 carbon atoms, X is a halogen selected from chlorine, bromine and a mixture thereof, a is an integer of 0-4, n is an integer of 2-6, and each R' is a haloalkyl radical having 1-8 carbon atoms, the halogen in this radical being chlorine, bromine or a mixture thereof, wherein the improvement comprises: adding an effective amount of hydroquinone to inhibit scorching in said foam formulation.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the ratio by weight of said halogenated phosphate polyester additive to hydroquinone is from about 500:1 to about 10:1.
Claim 4
Dependent Claim
33 words
The method of claim 1 wherein, as applied to said formula, R represents an aliphatic hydrocarbon radical having 1-8 carbon atoms, n is 2 and all the radicals represented by R' are identical.
Claim 5
Dependent Claim
18 words
The method of claim 3 wherein, as applied to said formula, X is chlorine and R' is chloroalkyl.
Claim 6
Dependent Claim
36 words
The method of claim 4 wherein said halogenated phosphate polyester is represented by the formula ##STR4## wherein R' represents a chloroalkyl radical having 1-4 carbon atoms, and R represents an alkylene radical having 1-4 carbon atoms.
Claim 7
Dependent Claim
25 words
The method of claim 5 wherein the ratio by weight of said halogenated phosphate polyester additive to hydroquinone is from about 500:1 to about 10:1.
Claim 8
Dependent Claim
13 words
The method of claim 5 wherein said halogenated phosphate polyester is tetrakis(2-chloroethyl)ethylene diphosphate.
Claim 9
Dependent Claim
24 words
The method of claim 5 wherein said polyurethane foam formulation comprises a polyether polyol, an organic polyisocyanate, a reaction catalyst and a foaming agent.
Claim 10
Dependent Claim
25 words
The method of claim 8 wherein said polyether polyol is an oxyalkylated polyhydric alcohol having a molecular weight range of about 200 to about 10,000.
Claim 11
Dependent Claim
11 words
The method of claim 9 wherein said foaming agent is water.
Claim 12
Dependent Claim
30 words
The method of claim 10 wherein said water is employed in an amount from about 1.0 to about 6.0 parts by weight per 100 parts by weight of said polyol.
Claim 13
Dependent Claim
33 words
The method of claim 11 wherein said halogenated phosphate polyester additive is employed in an amount from about 2 to about 30 parts by weight per 100 parts by weight of said polyol.
Claim 14
Dependent Claim
20 words
The method of claim 12 wherein said organic polyisocyanate is toluene diisocyanate and said polyurethane foam formulation contains a surfactant.
Claim 15
Dependent Claim
15 words
The method of claim 13 wherein said halogenated phosphate polyester additive is tetrakis(2-chloroethyl) ethylene diphosphate.
Claim 16
Dependent Claim
67 words
The method of claim 14 wherein said oxyalkylated polyhydric alcohol is oxypropylated glycerol, said catalyst is a mixture of a tertiary amine and a stannous salt, said toluene diisocyanate is a 4:1 by weight mixture of the 2,4- and 2,6-isomers of toluene diisocyanate, and said water is employed in amount from about 3.6 to about 5.5 parts by weight per 100 parts by weight of said polyol.
Claim 17
Dependent Claim
25 words
The method of claim 15 wherein the ratio by weight of said halogenated phosphate polyester additive to hydroquinone is from about 500:1 to about 10:1.
Claim 18
Dependent Claim
17 words
The method of claim 16 wherein said ratio by weight is from about 400:1 to about 100:1.
Claim 19
Dependent Claim
9 words
The product produced by the process of claim 1.
Claim 20
Dependent Claim
9 words
The product produced by the process of claim 5.
Claim 21
Dependent Claim
9 words
The product produced by the process of claim 17.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |