US4011194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke retardants for polyvinyl halides and polystyrenes
Assignee: Arkema Inc
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Filing: 1975-10-16
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Granted: 1977-03-08
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Expires: 1995-10-16
Abstract
Abstract Metal-2-mercaptobenzothiazoles, metal-2-mercaptobenzoxazoles, and metal-2-mercaptobenzimidazoles are used as smoke retardants for polyvinyl halides and polystyrenes and have the general structure of ##STR1## WHERE R and R 1 can be a hydrogen, alkyl, aryl, alkylaryl or halogen, X is either oxygen, sulfur or NR 2 , M is a metal, n is an integer equal to the valence of the metal and R 2 can be a hydrogen, alkyl, aryl or alkylaryl group.
Inventors
- 👤 Stanley Robert Sandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:36
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/02; C08; C08K; C08K5/00; C08K5/0091; C08K5/36; C08K5/45; C08K5/46; C08K5/47
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
150 words
A smoke-retardant polymer composition comprising a resin selected from the group consisting of polyvinyl halide and polystyrene admixed with a sufficient amount to reduce smoking of a metal-2-mercaptobenzothiazole, metal-2-mercaptobenzoxazole, or metal-2-mercaptobenzimidazole having the general structure: ##STR19## where a. R, R 1 and R 2 are independently selected from the class consisting of hydrogen, alkyl of 1 to 4 carbons, aryl of 6 to 12 carbons, and alkylaryl of 7 to 12 carbons, in addition R and R 1 can be selected from a halogen; b. X is selected from oxygen, sulfur or an NR 2 group; c. M is a metal selected from the class consisting of beryllium, magnesium, calcium, strontium, barium, titanium, zirconium, antimony, bismuth, chromium, molybdenum, tungsten, manganese, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, mercury, aluminum, germanium, and lead; and d. n is an integer equal to the valence of the metal M.
Claim 2
Dependent Claim
150 words
A smoke-retardant polymer composition comprising a resin selected from the group consisting of polyvinyl halide and polystyrene admixed with a sufficient amount to reduce smoking of a metal-2-mercaptobenzothiazole, metal-2-mercaptobenzoxazole, or metal-2-mercaptobenzimidazole having the general structure: ##STR19## where a. R, R 1 and R 2 are independently selected from the class consisting of hydrogen, alkyl of 1 to 4 carbons, aryl of 6 to 12 carbons, and alkylaryl of 7 to 12 carbons, in addition R and R 1 can be selected from a halogen; b. X is selected from oxygen, sulfur or an NR 2 group; c. M is a metal selected from the class consisting of beryllium, magnesium, calcium, strontium, barium, titanium, zirconium, antimony, bismuth, chromium, molybdenum, tungsten, manganese, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, mercury, aluminum, germanium, and lead; and d. n is an integer equal to the valence of the metal M.
Claim 3
Dependent Claim
31 words
A composition of claim 1 wherein the sufficient amount of the metal-2-mercaptobenzothiazole, metal-2-mercaptobenzoxazole, or metal-2-mercaptobenzimidazole is in the range of 0.25 to 30 parts per 100 parts of the polymer resin.
Claim 4
Dependent Claim
21 words
A composition of claim 2 wherein the metals are selected from the group consisting of Fe, Cu, Co, Pb and Mn.
Claim 5
Dependent Claim
10 words
A composition of claim 3 wherein the metal-2-mercaptobenzothiazole is ##STR20##
Claim 6
Dependent Claim
10 words
A composition of claim 3 wherein the metal-2-mercaptobenzothiazole is ##STR21##
Claim 7
Dependent Claim
10 words
A composition of claim 3 wherein the metal-2-mercaptobenzothiazole is ##STR22##
Claim 8
Dependent Claim
10 words
A composition of claim 3 wherein the metal-2-mercaptobenzoxazole is ##STR23##
Claim 9
Dependent Claim
10 words
A composition of claim 3 wherein the metal-2-mercaptobenzimidazole is ##STR24##
Claim 10
Dependent Claim
17 words
A composition of claim 1 wherein R and R 1 are independently selected from chlorine or bromine.
Claim 11
Dependent Claim
20 words
A composition of claim 1 wherein R 2 is selected from hydrogen or an alkyl of 1 to 4 carbons.
Claim 12
Dependent Claim
153 words
The process of making a smoke retardant resin selected from the group consisting of polyvinyl halide and polystyrene comprising mixing with the resin a sufficient amount to reduce smoking of a metal-2-mercaptobenzothiazole, metal-2-mercaptobenzoxazole, or metal-2-mercaptobenzimidazole having the structure: ##STR25## where a. R, R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl of 1 to 4 carbons, aryl of 6 to 12 carbons, and alkylaryl of 7 to 12 carbons, in addition R and R 1 can be selected from a halogen; b. X is selected from oxygen, sulfur or a NR 2 group; c. M is a metal selected from the class consisting of beryllium, magnesium, calcium, strontium, barium, titanium, zirconium, antimony, bismuth, chromium, molybdenum, tungsten, manganese, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, mercury, aluminum, germanium, and lead; and d. n is an integer equal to the valence of the metal M.
Claim 13
Dependent Claim
153 words
The process of making a smoke retardant resin selected from the group consisting of polyvinyl halide and polystyrene comprising mixing with the resin a sufficient amount to reduce smoking of a metal-2-mercaptobenzothiazole, metal-2-mercaptobenzoxazole, or metal-2-mercaptobenzimidazole having the structure: ##STR25## where a. R, R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl of 1 to 4 carbons, aryl of 6 to 12 carbons, and alkylaryl of 7 to 12 carbons, in addition R and R 1 can be selected from a halogen; b. X is selected from oxygen, sulfur or a NR 2 group; c. M is a metal selected from the class consisting of beryllium, magnesium, calcium, strontium, barium, titanium, zirconium, antimony, bismuth, chromium, molybdenum, tungsten, manganese, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, mercury, aluminum, germanium, and lead; and d. n is an integer equal to the valence of the metal M.
Claim 14
Dependent Claim
14 words
A composition of claim 3 wherein the metal derivative is a mixture of ##STR26##
Claim 15
Dependent Claim
11 words
A composition of claim 3 wherein the resin is polyvinyl chloride.
Claim 16
Dependent Claim
10 words
A composition of claim 3 wherein the resin is polystyrene.
Claim 17
Dependent Claim
106 words
A smoke-retardant polymer composition comprising a resin of polystyrene admixed with a sufficient amount to reduce smoking of a metal-2-mercaptobenzothiazole having the general structure: ##STR27## where a. R, R 1 and R 2 are independently selected from the class consisting of hydrogen, alkyl of 1 to 4 carbons, aryl of 6 to 12 carbons, and alkylaryl of 7 to 12 carbons, in addition R and R 1 can be selected from a halogen; b. X is sulfur; c. M is a metal selected from the class consisting of zinc, cadmium, and tin; and d. n is an integer equal to the valence of the metal M.
Claim 18
Dependent Claim
106 words
A smoke-retardant polymer composition comprising a resin of polystyrene admixed with a sufficient amount to reduce smoking of a metal-2-mercaptobenzothiazole having the general structure: ##STR27## where a. R, R 1 and R 2 are independently selected from the class consisting of hydrogen, alkyl of 1 to 4 carbons, aryl of 6 to 12 carbons, and alkylaryl of 7 to 12 carbons, in addition R and R 1 can be selected from a halogen; b. X is sulfur; c. M is a metal selected from the class consisting of zinc, cadmium, and tin; and d. n is an integer equal to the valence of the metal M.
Claim 19
Dependent Claim
101 words
A smoke-retardant polymer composition comprising a resin selected from the group consisting of polyvinyl halide and polystyrene admixed with a sufficient amount to reduce smoking of a metal-2-mercaptobenzothiazole having the general structure: ##STR28## where a. R, R 1 and R 2 are independently selected from the class consisting of hydrogen, alkyl of 1 to 4 carbons, aryl of 6 to 12 carbons, and alkylaryl of 7 to 12 carbons, in addition R and R 1 can be selected from a halogen; b. M is tin or cadmium; and c. n is an integer equal to the valence of the metal M.
Claim 20
Dependent Claim
101 words
A smoke-retardant polymer composition comprising a resin selected from the group consisting of polyvinyl halide and polystyrene admixed with a sufficient amount to reduce smoking of a metal-2-mercaptobenzothiazole having the general structure: ##STR28## where a. R, R 1 and R 2 are independently selected from the class consisting of hydrogen, alkyl of 1 to 4 carbons, aryl of 6 to 12 carbons, and alkylaryl of 7 to 12 carbons, in addition R and R 1 can be selected from a halogen; b. M is tin or cadmium; and c. n is an integer equal to the valence of the metal M.
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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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |