US4174343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pentaerythrityl diphosphonate-ammonium polyphosphate combinations as flame retardants for olefin polymers
Assignee: Wyeth Holdings LLC
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Filing: 1978-05-05
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Granted: 1979-11-13
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Expires: 1998-05-05
Abstract
Abstract Self-extinguishing, non-dripping polyolefin polymer compositions are prepared from a mixture of certain pentaerythrityl diphosphonates and ammonium phosphate. Dicyanopentaerythrityl diphosphonate, a new compound, is useful herein without the polyphosphate.
Inventors
- 👤 William B. Hardy
- 👤 Tae B. Min
- 👤 Joseph A. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:56
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4062; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
37 words
A self-extinguishing, non-dripping composition comprising a polyolefin and a self-extinguishing, non-dripping amount of a combination of (A) a compound having the formula ##STR9## wherein R is selected from methyl, phenyl, benzyl and cyano, and (B) ammonium polyphosphate.
Claim 2
Dependent Claim
37 words
A self-extinguishing, non-dripping composition comprising a polyolefin and a self-extinguishing, non-dripping amount of a combination of (A) a compound having the formula ##STR9## wherein R is selected from methyl, phenyl, benzyl and cyano, and (B) ammonium polyphosphate.
Claim 3
Dependent Claim
9 words
The composition of claim 1 wherein R is methyl.
Claim 4
Dependent Claim
9 words
The composition of claim 1 wherein R is phenyl.
Claim 5
Dependent Claim
9 words
The composition of claim 1 wherein R is benzyl.
Claim 6
Dependent Claim
9 words
The composition of claim 1 wherein R is cyano.
Claim 7
Dependent Claim
16 words
The composition of claim 1 wherein the ratio of (A):(B) is from about 3:1 to 1:2.
Claim 8
Dependent Claim
27 words
The composition of claims 1 and 6 wherein the total amount of (A) and (B) is from about 20 to 40 percent by weight of the composition.
Claim 9
Dependent Claim
13 words
The composition of claim 1 wherein the polyolefin has about 2-4 carbon atoms.
Claim 10
Dependent Claim
10 words
The composition of claim 8 wherein the polyolefin is polypropylene.
Claim 11
Dependent Claim
71 words
The composition of claim 1 further containing (C) about 0.25 to 5 percent by weight, based on the weight of the polymer to which the composition is to be added, of a compound selected from the group consisting of (1) alkali metal carbonates, (2) alkaline earth metal carbonates, (3) alkaline earth metal oxides, (4) Group IV-A metal oxides, (5) titanium dioxide, (6) aluminum oxide, (7) zinc oxide, and (8) antimony oxide.
Claim 12
Dependent Claim
10 words
The composition of claim 10 wherein (C) is titanium dioxide.
Claim 13
Dependent Claim
15 words
A self-extinguishing, non-dripping composition comprising a polyolefin and a self-extinguishing, non-dripping amount of dicyanopentaerythrityl diphosphonate.
Claim 14
Dependent Claim
15 words
A self-extinguishing, non-dripping composition comprising a polyolefin and a self-extinguishing, non-dripping amount of dicyanopentaerythrityl diphosphonate.
Claim 15
Dependent Claim
21 words
The composition of claim 12 wherein the diphosphonate is present in about 20 to 40 percent by weight of the composition.
Claim 16
Dependent Claim
13 words
The composition of claim 12 wherein the polyolefin has about 2-4 carbon atoms.
Claim 17
Dependent Claim
10 words
The composition of claim 14 wherein the polyolefin is polypropylene.
Claim 18
Independent Claim
40 words
A method of flame retarding a polyolefin comprising adding to it a self-extinguishing, non-dripping amount of a combination of (A) a compound of the formula: ##STR10## wherein R is selected from methyl, phenyl, benzyl and cyano, and (B) ammonium polyphosphate.
Claim 19
Independent Claim
40 words
A method of flame retarding a polyolefin comprising adding to it a self-extinguishing, non-dripping amount of a combination of (A) a compound of the formula: ##STR10## wherein R is selected from methyl, phenyl, benzyl and cyano, and (B) ammonium polyphosphate.
Claim 20
Dependent Claim
2 words
Dicyanopentaerythrityl diphosphonate.
Claim 21
Dependent Claim
2 words
Dicyanopentaerythrityl diphosphonate.
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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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |