US3945974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke suppressants for halogen-containing plastic compositions
Assignee: COOKSON MINERALS Ltd UTTOXETER ROAD MEIR STOKE-ON-TRENT ST3 7XS UNITED KINGDOM A Co OF UNITED KINGDOM
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Filing: 1973-12-20
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Granted: 1976-03-23
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Expires: 1993-12-20
Abstract
Abstract Zinc is added to a halogen-containing plastic composition with or without a flame retardant additive to serve as a smoke suppressant during combustion of the plastic.
Inventors
- 👤 Joseph Schwarcz
- 👤 Bernard Engelbart
- 👤 Edward L. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:56
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K3/00; C08K3/01; C08K3/016
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
63 words
Method for forming a smoke suppressing combustible polyvinyl chloride composition comprising a polyvinyl chloride resin, a stabilizer, and zinc oxide comprising the steps of adding zinc oxide to the components of said polyvinyl chloride composition during formulation thereof, said zinc oxide added in amounts in the range of from about 0.2 to no more than about 1.0 part per 100 parts polymer resin.
Claim 2
Dependent Claim
63 words
Method for forming a smoke suppressing combustible polyvinyl chloride composition comprising a polyvinyl chloride resin, a stabilizer, and zinc oxide comprising the steps of adding zinc oxide to the components of said polyvinyl chloride composition during formulation thereof, said zinc oxide added in amounts in the range of from about 0.2 to no more than about 1.0 part per 100 parts polymer resin.
Claim 3
Dependent Claim
58 words
Method for forming a smoke suppressing combustible polyvinyl chloride composition comprising adding finely divided zinc metal to the components of said polyvinyl chloride composition during formulation thereof said finely divided zinc metal added in amounts in the ranges of from about 0.2 to no more than about 1.0 part calculated as zinc oxide per 100 parts plymer resin.
Claim 4
Dependent Claim
58 words
Method for forming a smoke suppressing combustible polyvinyl chloride composition comprising adding finely divided zinc metal to the components of said polyvinyl chloride composition during formulation thereof said finely divided zinc metal added in amounts in the ranges of from about 0.2 to no more than about 1.0 part calculated as zinc oxide per 100 parts plymer resin.
Claim 5
Dependent Claim
68 words
Method for forming a smoke suppressing combustible polyvinyl chloride composition comprising a polyvinyl chloride resin, a stabilizer, a plasticizer, a flame retardant and zinc oxide comprising the steps of adding zinc oxide to the components of said polyvinyl chloride composition during formulation thereof said zinc oxide added in amounts in the range of from about 0.2 to no more than about 1.0 part per 100 parts polymer resin.
Claim 6
Dependent Claim
68 words
Method for forming a smoke suppressing combustible polyvinyl chloride composition comprising a polyvinyl chloride resin, a stabilizer, a plasticizer, a flame retardant and zinc oxide comprising the steps of adding zinc oxide to the components of said polyvinyl chloride composition during formulation thereof said zinc oxide added in amounts in the range of from about 0.2 to no more than about 1.0 part per 100 parts polymer resin.
Claim 7
Dependent Claim
14 words
Method according to claim 3 wherein said flame retardant is a compound of antimony.
Claim 8
Dependent Claim
13 words
Method according to claim 4 wherein said compound of antimony comprises antimony trioxide.
Claim 9
Dependent Claim
14 words
Method according to claim 4 wherein said compound of antimony is an antimony-silico compound.
Claim 10
Dependent Claim
20 words
Method according to claim 4 wherein said compound of antimony is a calcined complex of an antimony-silico compound and zinc.
Claim 11
Dependent Claim
61 words
Method for forming a smoke suppressing combustible polyvinyl chloride composition comprising adding powdered zinc metal in combination with a flame retardant to the components of said polyvinyl chloride composition during formulation thereof said zinc metal added in amounts in the range of from about 0.2 to no more than about 1.0 part calculated as zinc oxide per 100 parts polymer resin.
Claim 12
Dependent Claim
61 words
Method for forming a smoke suppressing combustible polyvinyl chloride composition comprising adding powdered zinc metal in combination with a flame retardant to the components of said polyvinyl chloride composition during formulation thereof said zinc metal added in amounts in the range of from about 0.2 to no more than about 1.0 part calculated as zinc oxide per 100 parts polymer resin.
Claim 13
Dependent Claim
46 words
A smoke suppressing combustible polyvinyl chloride composition comprising a vinyl chloride polymer, a stabilizer, and a smoke suppressant said smoke suppressant comprising zinc oxide in an amount in the range of from about 0.2 to no more than about 1.0 part per 100 parts polymer resin.
Claim 14
Dependent Claim
46 words
A smoke suppressing combustible polyvinyl chloride composition comprising a vinyl chloride polymer, a stabilizer, and a smoke suppressant said smoke suppressant comprising zinc oxide in an amount in the range of from about 0.2 to no more than about 1.0 part per 100 parts polymer resin.
Claim 15
Dependent Claim
30 words
A smoke suppressing combustible polyvinyl chloride composition according to claim 9 wherein said polymer composition includes a plastitizer and a flame retardant additive said additive comprising a compound of antimony.
Claim 16
Dependent Claim
19 words
A smoke suppressing combustible polyvinyl chloride composition according to claim 10 wherein said compound of antimony is antimony trioxide.
Claim 17
Dependent Claim
20 words
A smoke suppressing combustible polyvinyl chloride composition according to claim 10 wherein said compound of antimony is an antimony-silico compound.
Claim 18
Dependent Claim
49 words
A smoke suppressing combustible polyvinyl chloride composition comprising a vinyl chloride polymer having a smoke suppressant incorporated therein said smoke suppressant comprising zinc dust added in amounts in the range from about 0.2 to no more than about 1.0 part, calculated as zinc oxide, per 100 parts polymer resin.
Claim 19
Dependent Claim
49 words
A smoke suppressing combustible polyvinyl chloride composition comprising a vinyl chloride polymer having a smoke suppressant incorporated therein said smoke suppressant comprising zinc dust added in amounts in the range from about 0.2 to no more than about 1.0 part, calculated as zinc oxide, per 100 parts polymer resin.
Claim 20
Dependent Claim
20 words
A smoke suppressing combustible polyvinyl chloride composition according to claim 13 wherein said compound of antimony is an antimony-silico compound.
Claim 21
Dependent Claim
53 words
Method for forming a smoke suppressing combustible acrylonitrile-butadiene-styrene polymer containing an organic halide flame retardant comprising: adding zinc oxide to the components of said polymer during formulation thereof said zinc oxide added in amounts in the range of from about 0.2 to no more than about 1.0 part per 100 parts polymer resin.
Claim 22
Dependent Claim
53 words
Method for forming a smoke suppressing combustible acrylonitrile-butadiene-styrene polymer containing an organic halide flame retardant comprising: adding zinc oxide to the components of said polymer during formulation thereof said zinc oxide added in amounts in the range of from about 0.2 to no more than about 1.0 part per 100 parts polymer resin.
Claim 23
Dependent Claim
51 words
Method for forming a smoke suppressing combustible polyester containing an organic halide flame retardant comprising: adding zinc oxide to the components of said polyester during formulation thereof said zinc oxide added in amounts in the range of from about 0.2 to no more than about 1.0 part per 100 parts resin.
Claim 24
Dependent Claim
51 words
Method for forming a smoke suppressing combustible polyester containing an organic halide flame retardant comprising: adding zinc oxide to the components of said polyester during formulation thereof said zinc oxide added in amounts in the range of from about 0.2 to no more than about 1.0 part per 100 parts resin.
References Cited (Backward Citations)
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US2948638A
Cited
US3202567A
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US3770577A
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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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |