Patent US4000140A successfully refreshed from Google Patents.
US4000140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet material
Assignee: HUGGETT & MATTHEWS Ltd
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Filing: 1975-05-21
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Granted: 1976-12-28
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Expires: 1995-05-21
Abstract
Abstract The invention relates to a waterproof sheet material, suitable for use as a waterproof roofing layer, as a bridge deck or like waterproofing material, and as a dampcourse material, the sheet being composed of a mixture comprising (a) a bituminous material, (b) a synthetic polymeric material, and (c) particulate filler, said synthetic polymeric material comprising at least one uncured copolymer selected from ethylene-propylene copolymers and ethylene-propylene-diene copolymers and at least one synthetic polar elastomer. The sheet material may contain ethylene-vinyl acetate copolymer, and plasticizer, fire-retardant, and minor additives such as antioxidants may be incorporated. A suitable synthetic polar elastomer is nitrile rubber. The sheet material maintains good performance properties under low temperature conditions.
Inventors
- 👤 Patrick Joseph Tierney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
C; C08; C08L; C08L95/00; C08K; C08K3/00; C08K3/01; C08K3/013; C08L21/00; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/16; C08L23/0846; C08L23/0853; C08L33/00; C08L33/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
A self-supporting waterproof bituminous sheet material consisting essentially of from 5 to 30 weight percent of bituminous mateial, from 15 to 50 weight percent of synthetic polymer material, from 5 to 60 weight percent of particulate filler, up to 15 weight percent of fibrous filler, up to 20 weight percent plasticizer and up to 20 weight percent of fire retardant, said synthetic polymer material consisting essentially of at least one synthetic polar elastomer and an uncured copolymer component selected from the group consisting of ethylene-propylene copolymers and ethylene-propylene-diene copolymers, and in which the synthetic polar elastomer is present in a proportion smaller than that of said uncured copolymer.
Claim 2
Dependent Claim
108 words
A self-supporting waterproof bituminous sheet material consisting essentially of from 5 to 30 weight percent of bituminous mateial, from 15 to 50 weight percent of synthetic polymer material, from 5 to 60 weight percent of particulate filler, up to 15 weight percent of fibrous filler, up to 20 weight percent plasticizer and up to 20 weight percent of fire retardant, said synthetic polymer material consisting essentially of at least one synthetic polar elastomer and an uncured copolymer component selected from the group consisting of ethylene-propylene copolymers and ethylene-propylene-diene copolymers, and in which the synthetic polar elastomer is present in a proportion smaller than that of said uncured copolymer.
Claim 3
Dependent Claim
23 words
A sheet material according to claim 1 wherein said bituminous material has a Ring and Ball softening point of at least 70° C.
Claim 4
Dependent Claim
16 words
A sheet material according to claim 1 wherein said synthetic polymeric material includes ethylene-vinyl acetate copolymer.
Claim 5
Dependent Claim
28 words
A sheet material according to claim 1 containing uncured ethylene-propylene-diene copolymer in which said diene component is selected from the group consisting of dicyclopentadiene, 2-ethylidene norbornene and 1,4-hexadiene.
Claim 6
Dependent Claim
25 words
A sheet material according to claim 1 wherein said synthetic polar elastomer is selected from the group consisting of nitrile rubbers, polychloroprene, and styrene-butadiene rubbers.
Claim 7
Dependent Claim
18 words
A sheet material according to claim 1 wherein said uncured copolymer contains 40 to 80 weight percent ethylene.
Claim 8
Dependent Claim
21 words
A sheet material according to claim 1 containing uncured ethylene-propylene-diene copolymer whose diene content is from 3 to 6 weight percent
Claim 9
Dependent Claim
39 words
A sheet material according to claim 1 in which said synthetic polymer material consists essentially of ethylene-propylene-diene copolymer, butadiene-acrylonitrile copolymer rubber and ethylene-vinyl acetate copolymer, and said particulate filler consists of carbon black and at least one white filler.
Claim 10
Dependent Claim
23 words
A sheet material according to claim 1 containing chlorosulphonated polyethylene in an amount up to 25 weight percent of the synthetic polar elastomer.
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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |