US3927145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame resistant polyolefins
Assignee: Union Carbide Canada Ltd
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Filing: 1974-10-29
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Granted: 1975-12-16
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Expires: 1994-10-29
Abstract
Abstract A composition consisting of polyethylene capable of retaining its flame resistant characteristics for prolonged periods is described which consists of a blend of polyethylene, hexabromobiphenyl, antimony trioxide and a copolymer of ethylene and vinyl acetate, acrylic acid or ethyl acrylate.
Inventors
- 👤 Bruno L Gaeckel
- 👤 Hans R Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:10
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K5/03; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08K5/04; C08K5/14; C08L23/0846; C08L23/0853; C08L23/0869; C08L2312/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
A POLYOLEFIN COMPOSITION HAVING IMPROVED FLAME RESISTANT CHARACTERISTICS WHICH COMPRISES POLYETHYLENE BLENDED WITH FORM 5 TO 15% BY WEIGHT OF HEXABROMOBIPHENYL; FROM 2 TO 15% BY WEIGHT OF ANTIMONY TRIODIXE AND FROM 5 TO 50% BY WEIGHT OF A COPOLYMER OF ETHYLENE AND ONE SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, ACRYLIC ACID AND ETHYL ACRYLATE, THE WEIGHT PERCENTAGES BASED ON THE WEIGHT OF THE POLYETHYLENE.
Claim 2
Dependent Claim
67 words
A POLYOLEFIN COMPOSITION HAVING IMPROVED FLAME RESISTANT CHARACTERISTICS WHICH COMPRISES POLYETHYLENE BLENDED WITH FORM 5 TO 15% BY WEIGHT OF HEXABROMOBIPHENYL; FROM 2 TO 15% BY WEIGHT OF ANTIMONY TRIODIXE AND FROM 5 TO 50% BY WEIGHT OF A COPOLYMER OF ETHYLENE AND ONE SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, ACRYLIC ACID AND ETHYL ACRYLATE, THE WEIGHT PERCENTAGES BASED ON THE WEIGHT OF THE POLYETHYLENE.
Claim 3
Dependent Claim
31 words
A polyolefin composition as claimed in claim 1 wherein said copolymer is ethylene/vinyl acetate containing from 5 to 50% by weight of vinyl acetate based on the weight of the copolymer.
Claim 4
Dependent Claim
31 words
A polyolefin composition as claimed in claim 1 wherein said copolymer is ethylene/vinyl acetate containing from 27 to 29% by weight of vinyl acetate based on the weight of the copolymer.
Claim 5
Dependent Claim
53 words
A polyolefin composition having improved flame resistant characteristics which comprises polyethylene blended with from 5% to 15% by weight of hexabromobiphenyl, from 2 to 15% by weight of antimony trioxide and from 10 to 25% by weight of a copolymer of ethylene/vinyl acetate, the weight percentages based on the weight of the polyethylene.
Claim 6
Dependent Claim
53 words
A polyolefin composition having improved flame resistant characteristics which comprises polyethylene blended with from 5% to 15% by weight of hexabromobiphenyl, from 2 to 15% by weight of antimony trioxide and from 10 to 25% by weight of a copolymer of ethylene/vinyl acetate, the weight percentages based on the weight of the polyethylene.
Claim 7
Dependent Claim
21 words
A polyolefin composition as claimed in claim 4 wherein said composition includes from 0.5 to 2.5% by weight of dicumyl peroxide.
Claim 8
Independent Claim
80 words
A method of producing a polyolefin composition having improved flame resistant characteristics which comprises blending low density polyethylene with from 5 to 15% by weight of hexabromobiphenyl, from 2 to 15% by weight of antimony trioxide and from 5 to 50% by weight of a copolymer of ethylene and one selected from the group consisting of vinyl acetate, acrylic acid and ethyl acrylate at about 150*C for 5 minutes, the weight percentages being based on the weight of the polyethylene.
Claim 9
Independent Claim
80 words
A method of producing a polyolefin composition having improved flame resistant characteristics which comprises blending low density polyethylene with from 5 to 15% by weight of hexabromobiphenyl, from 2 to 15% by weight of antimony trioxide and from 5 to 50% by weight of a copolymer of ethylene and one selected from the group consisting of vinyl acetate, acrylic acid and ethyl acrylate at about 150*C for 5 minutes, the weight percentages being based on the weight of the polyethylene.
Claim 10
Dependent Claim
42 words
A method as claimed in claim 5 wherein after the 6 minute blending period the temperature is reduced to about 130*C, from 0.5% to 2.5% by weight of dicumyl peroxide is added and the total composition blended for a further one minute.
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 |