US3950306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tris-(polyhalophenoxy)-s-triazine flame retardants
Assignee: Dow Chemical Co
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Filing: 1974-10-01
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Granted: 1976-04-13
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Expires: 1994-10-01
Abstract
Abstract New organic compounds, comprising tris(polyhalophenoxy)-s-triazines, e.g., tris-(2,4,6-tribromophenoxy)-s-triazine. These new compounds have demonstrated utility as fire retardant additives for various polymers.
Inventors
- 👤 R. Garth Pews
- 👤 Jeffrey A. Gunsher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A composition comprising a polymer containing as a fire retardant a small but fire retarding amount of a compound of the general formula ##SPC2## wherein each X is independently Br or Cl, each m is independently an integer of 1 to 5, and at least about 45% by weight of the compound is Br, Cl or a mixture thereof.
Claim 2
Dependent Claim
59 words
A composition comprising a polymer containing as a fire retardant a small but fire retarding amount of a compound of the general formula ##SPC2## wherein each X is independently Br or Cl, each m is independently an integer of 1 to 5, and at least about 45% by weight of the compound is Br, Cl or a mixture thereof.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein the polymer is polystyrene.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein the polymer is polyethylene terephthalate.
Claim 5
Dependent Claim
30 words
The composition of claim 1 wherein the concentration of the compound of claim 1 ranges from about 1 to about 20% by weight based on the weight of the polymer.
Claim 6
Dependent Claim
30 words
The composition of claim 1 wherein the concentration of the compound of claim 1 ranges from about 5 to about 10% by weight based on the weight of the polymer.
Claim 7
Dependent Claim
15 words
The composition of claim 5 wherein the compound of claim 1 is tris-(tribromophenoxy)-s-triazine or tris-(pentabromophenoxy)-s-triazine.
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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |