US4064104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphine oxide flame retardants
Assignee: EIDP Inc
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Filing: 1976-11-15
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Granted: 1977-12-20
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Expires: 1996-11-15
Abstract
Abstract Aromatic phosphine oxide compounds are useful as flame retardants in synthetic polymers and textiles. Exemplary is 2,4,6-trimethylmesitylylenetris(diphenylphosphine oxide).
Inventors
- 👤 Joseph J. Mrowca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:18
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5329
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A flame-retardant compound having the formula ##STR29## wherein R and R 1 individually are alkyl, aryl or aralkyl of up to 10 carbon atoms having up to 5 chlorine, bromine or fluorine atoms; X is SO 2 NH 2 , SO 2 NHR or SO 2 NR 2 , R being as defined above; a is 1 to 4; b is 2 to 5; and a + b is 3 to 6.
Claim 2
Dependent Claim
72 words
A flame-retardant compound having the formula ##STR29## wherein R and R 1 individually are alkyl, aryl or aralkyl of up to 10 carbon atoms having up to 5 chlorine, bromine or fluorine atoms; X is SO 2 NH 2 , SO 2 NHR or SO 2 NR 2 , R being as defined above; a is 1 to 4; b is 2 to 5; and a + b is 3 to 6.
Claim 3
Dependent Claim
9 words
The compound of claim 1 which is 2-(N,N-diethylsulfamoyl)mesitylenetris(diphenylphosphine oxide).
Claim 4
Dependent Claim
32 words
A flame-retardant composition comprising a polymer selected from the group consisting of a polyolefin, polyester and polyamide and 1-25% by weight, based on the said polymer, of a compound of claim 1.
Claim 5
Dependent Claim
11 words
The composition of claim 3 in which the polymer is polypropylene.
Claim 6
Dependent Claim
12 words
The composition of claim 3 in which the polymer is polyethylene terephthalate.
Claim 7
Dependent Claim
11 words
The composition of claim 3 in which the polymer is polycaprolactam.
References Cited (Backward Citations)
US3895074A
Cited
US3975447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |