US3926883A
Expired / Lapsed
US
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Flame retardant compositions
Assignee: M&T Chemicals Inc
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Filing: 1974-09-11
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Granted: 1975-12-16
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Expires: 1994-09-11
Abstract
Abstract Novel tin containing flame retardants for synthetic polymers that exhibit reduced tin content simultaneously with effective flame retarding characteristics consist of one part by weight of hydrated stannic oxide in combination wtih four parts of a member selected from the group consisting of colemanite (calcium borate hexahydrate), zinc oxide and mixtures of zinc oxide and magnesium oxide. Polymer compositions containing these flame retardants possess improved flame retarding characteristics simultaneously with effective color stability in the presence of heat and at a substantial reduction in cost over polymers containing known flame retarding compositions.
Inventors
- 👤 Irving Touval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/38; C08K5/00; C08K5/0008; C08K5/0066
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
A POLYMER COMPOSITION EXHIBITING ENHANCED FLAME RETARDANCY, WHEREIN THE POLYMER IS SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYVINYLIDENE CHLORIDE AND COPOLYMERS OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE WITH ONE ANOTHER AND WITH ETHYLENICALLY UNSATURATED MONOMERS, WHEREIN SAID POLYMER COMPOSITION CONTAINS BETWEEN 0.5 AND 10 PARTS BY WEIGHT PER 100 PARTS OF SAID POLYMER OF A FLAME RETARDANT CONTAINING 20 PERCENT BY EIGHT OF HYDRATED STANNIC OXIDE AND 80 PERCENT BY WEIGHT OF A SECOND COMPONENT SELECTED FROM THE GROUP CONSISTING OF COLEMANITE, ZINC OXIDE AND MIXTURES OF ZINC OXIDE AND MAGNESIUM OXIDE.
Claim 2
Dependent Claim
94 words
A POLYMER COMPOSITION EXHIBITING ENHANCED FLAME RETARDANCY, WHEREIN THE POLYMER IS SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYVINYLIDENE CHLORIDE AND COPOLYMERS OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE WITH ONE ANOTHER AND WITH ETHYLENICALLY UNSATURATED MONOMERS, WHEREIN SAID POLYMER COMPOSITION CONTAINS BETWEEN 0.5 AND 10 PARTS BY WEIGHT PER 100 PARTS OF SAID POLYMER OF A FLAME RETARDANT CONTAINING 20 PERCENT BY EIGHT OF HYDRATED STANNIC OXIDE AND 80 PERCENT BY WEIGHT OF A SECOND COMPONENT SELECTED FROM THE GROUP CONSISTING OF COLEMANITE, ZINC OXIDE AND MIXTURES OF ZINC OXIDE AND MAGNESIUM OXIDE.
Claim 3
Dependent Claim
12 words
The polymer composition of claim 1 wherein the polymer is polyvinyl chloride.
Claim 4
Dependent Claim
99 words
A polymer composition exhibiting enhanced flame retardancy wherein the polymer contains no halogen as an integral part thereof and is selected from the group consisting of polyolefins, acrylic polymers and polyurethanes, and wherein the polymer composition contains 1) a flame retarding agent consisting of 20 percent, based on the weight of said flame retarding agent, of hydrated stannic oxide, the remaining 80 percent selected from the group consisting of colemanite, zinc oxide and mixtures of zinc oxide and magnesium oxide and 2) between 1 and 12 times the weight of said flame retarding agent of an organic halogen compound.
Claim 5
Dependent Claim
99 words
A polymer composition exhibiting enhanced flame retardancy wherein the polymer contains no halogen as an integral part thereof and is selected from the group consisting of polyolefins, acrylic polymers and polyurethanes, and wherein the polymer composition contains 1) a flame retarding agent consisting of 20 percent, based on the weight of said flame retarding agent, of hydrated stannic oxide, the remaining 80 percent selected from the group consisting of colemanite, zinc oxide and mixtures of zinc oxide and magnesium oxide and 2) between 1 and 12 times the weight of said flame retarding agent of an organic halogen compound.
Claim 6
Dependent Claim
20 words
The polymer composition of claim 3 wherein the organic halogen compound does not boil or decompose at temperatures below 300*C.
Claim 7
Dependent Claim
21 words
The polymer composition of claim 4 wherein the organic halogen compound contains more than 20 percent by weight of said halogen.
Claim 8
Dependent Claim
24 words
The polymer composition of claim 4 wherein said organic halogen compound is selected from the group consisting of halogenated aliphatic, cycloaliphatic and aromatic hydrocarbons.
Claim 9
Dependent Claim
11 words
The polymer composition of claim 4 wherein the halogen is chlorine.
Claim 10
Dependent Claim
21 words
The polymer composition of claim 3 wherein the organic halogen compound is a chlorinated paraffin wax or a chlorinated bicyclic hydrocarbon.
Claim 11
Dependent Claim
92 words
A composition for imparting flame retardancy to a material selected from the group consisting of a) halogen-containing synthetic organic polymers and b) non-halogen-containing organic polymers in combination with an organic halogen source, said composition consisting essentially of hydrated stannic oxide and a second component selected from the group consisting of colemanite, zinc oxide and mixtures of zinc oxide and magnesium oxide wherein the weight ratio of zinc oxide to magnesium oxide is between 1:3 and 3:1, respectively, and the weight ratio of hydrated stannic oxide to said second component is 1:4, respectively.
Claim 12
Dependent Claim
92 words
A composition for imparting flame retardancy to a material selected from the group consisting of a) halogen-containing synthetic organic polymers and b) non-halogen-containing organic polymers in combination with an organic halogen source, said composition consisting essentially of hydrated stannic oxide and a second component selected from the group consisting of colemanite, zinc oxide and mixtures of zinc oxide and magnesium oxide wherein the weight ratio of zinc oxide to magnesium oxide is between 1:3 and 3:1, respectively, and the weight ratio of hydrated stannic oxide to said second component is 1:4, respectively.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |