Patent US2320172A successfully refreshed from Google Patents.
Patent US3816367A successfully refreshed from Google Patents.
US3816367A
Expired / Lapsed
US
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Flame retardant compositions
Assignee: Arkema Inc
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Filing: 1972-05-31
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Granted: 1974-06-11
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Expires: 1992-05-31
Abstract
Abstract The combination of one or more antimony oxides specified antimonates, magnesium hydroxide and a halogen source imparts useful flame retardancy to a variety of synthetic polymers. In addition, the gradual increase in the viscosity of aqueous dispersions of the aforementioned combination which is observed using other magnesium compounds is not apparent using the hydroxide.
Inventors
- 👤 W Larkin
- 👤 J Kostrowski
- 👤 I Touval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:28
CPC Classifications
C; C08; C08L; C08L101/00; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/24; C08L19/00; C08L27/00; C08L27/02; C08L27/04; C08L27/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
41 words
a non-fused mixture comprising between 70 and 90% by weight of at least one antimony oxide and between 10 and 30 percent by weight of a compound selected from the group consisting of sodium antimonate, potassium antimonate and magnesium antimonate, and
Claim 2
Dependent Claim
14 words
A composition as described in claim 1 wherein said antimony oxide is antimony trioxide.
Claim 3
Dependent Claim
42 words
a non-fused mixture comprising between 70 and 90 percent by weight of at least one antimony oxide with between 10 and 30 percent by weight of a compound selected from the group consisting of sodium antimonate, potassium antimonate and magnesium antimonate, and
Claim 4
Dependent Claim
33 words
A composition as described in claim 2 wherein the concentration of antimony trioxide is within the range of between about 60 and 80 percent, based on the weight of antimony and magnesium compounds.
Claim 5
Dependent Claim
35 words
a magnesium compound, wherein the improvement resides in the presence of magnesium hydroxide as the magnesium compound in a concentration of between 5 and 15%, based on the total weight of antimony and magnesium compounds.
Claim 6
Dependent Claim
37 words
a magnesium compound, wherein the improvement resides in the presence of magnesium hydroxide as the magnesium compound at a concentration of between 5 and 15%, based on a combined weight of the non-fused mixture and magnesium compound.
Claim 7
Dependent Claim
13 words
A composition as described in claim 1 wherein said antimonate is sodium antimonate.
Claim 8
Dependent Claim
33 words
A composition as described in claim 4 wherein the concentration of sodium antimonate is within the range of between about 15 and 25 percent, based on the weight of antimony and magnesium compounds.
Claim 9
Dependent Claim
10 words
An improved flame retardant polymer composition consisting essentially entirely of
Claim 10
Dependent Claim
35 words
A polymer composition as described in claim 6 wherein said thermally unstable chlorine source is present in an amount within the range of between about 1 and 100%, based on the weight of said composition.
Claim 11
Dependent Claim
17 words
A polymer composition as described in claim 7 wherein the chlorine source is a chlorinated paraffin wax.
Claim 12
Dependent Claim
15 words
A polymer composition as described in claim 7 wherein the chlorine source is poly(vinyl chloride).
Claim 13
Dependent Claim
15 words
A polymer composition as described in claim 6 wherein said antimony oxide is antimony trioxide.
Claim 14
Dependent Claim
35 words
A polymer composition as described in claim 10 wherein the concentration of antimony trioxide is within the range of between about 60 and 80 percent, based on the total weight of antimony and magnesium compounds.
Claim 15
Dependent Claim
14 words
A polymer composition as described in claim 6 wherein said antimonate is sodium antimonate.
Claim 16
Dependent Claim
35 words
A polymer composition as described in claim 12 wherein the concentration of sodium antimonate is within the range of between about 15 and 25 percent, based on the total weight of antimony and magnesium compounds.
Claim 17
Dependent Claim
25 words
A polymer composition as described in claim 8 wherein the concentration of chlorinated paraffin wax is between about 1 and 12 percent of said material.
Claim 18
Dependent Claim
37 words
A polymer composition as described in claim 6 wherein the non-fused mixture is present in an amount within the range of between about 1 and 12 percent, based on the weight of said flame retardant polymer composition.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |