US4135042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of scorching in polyurethane foam
Assignee: Olin Corp
•
Filing: 1977-10-18
•
Granted: 1979-01-16
•
Expires: 1997-10-18
Abstract
Abstract Use of phosphites as scorch inhibitors in polyurethane foams containing halogenated phosphate polyester additives.
Inventors
- 👤 Donald L. Lickei
- 👤 Clifford J. Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:24
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
121 words
In a process for making polyurethane foam from a reaction mixture comprised of a polyether polyol, an organic polyisocyanate, a foaming agent and a halogenated phosphate polyester additive represented by the formula: ##STR5## 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, the improvement which comprises including in said reaction mixture a scorch-inhibitive amount of an aliphatic phosphite selected from cyclic and acyclic aliphatic phosphites.
Claim 2
Dependent Claim
121 words
In a process for making polyurethane foam from a reaction mixture comprised of a polyether polyol, an organic polyisocyanate, a foaming agent and a halogenated phosphate polyester additive represented by the formula: ##STR5## 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, the improvement which comprises including in said reaction mixture a scorch-inhibitive amount of an aliphatic phosphite selected from cyclic and acyclic aliphatic phosphites.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said foam is flexible and said polyol is a polyether polyol.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein said foaming agent is comprised of water.
Claim 5
Dependent Claim
36 words
The process of claim 3 wherein said halogenated phosphate polyester is represented by the formula ##STR6## wherein R" is a chloroalkyl radical having 1-4 carbon atoms and R' is an alkylene radical having 1-4 carbon atoms.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein said halogenated phosphate polyester is tetrakis(2-chloroethyl)ethylene diphosphate.
Claim 7
Dependent Claim
21 words
The process of claim 4 wherein said polyether polyol is an oxyalkylated polyhydric alcohol having a molecular weight of about 2,500-6,000.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein said organic polyisocyanate is toluene diisocyanate.
Claim 9
Dependent Claim
81 words
The process of claim 6 wherein said aliphatic phosphite is represented by a formula selected from the group consisting of ##STR7## wherein each of R and R 1 through R 7 is independently an aliphatic hydrocarbon radical containing only carbon atoms, hydrogen atoms, and optionally oxygen and/or halogen atoms, the halogen being chlorine, bromine, or a mixture thereof, and wherein each of R 8 and R 9 is independently alkyl or haloalkyl, the halogen being chlorine, bromine, or a mixture thereof.
Claim 10
Dependent Claim
34 words
The process of claim 8 wherein R contains 2-6 carbon atoms, each of R 1 through R 7 contains 3-18 carbon atoms and each of R 8 and R 9 contains 1-10 carbon atoms.
Claim 11
Dependent Claim
34 words
The process of claim 9 wherein R 1 , R 2 and R 3 are the same, R 4 through R 7 are the same and R 8 and R 9 are the same.
Claim 12
Dependent Claim
20 words
The process of claim 10 wherein a hydrolytically stable phosphite having a boiling point above about 200° C. is employed.
Claim 13
Dependent Claim
26 words
The process of claim 11 wherein said polyether polyol is a triol, said organic polyisocyanate is toluene diisocyanate, and said halogenated phosphate polyester is tetrakis(2-chloroethyl)ethylene diphosphate.
Claim 14
Dependent Claim
20 words
The process of claim 12 wherein said phosphite is selected from the group consisting of tris(2-chloroethyl)phosphite, tris(dipropyleneglycol)phosphite, and di(isodecyl)pentaerythrityl diphosphite.
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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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |