Patent US4151159A successfully refreshed from Google Patents.
US4151159A
Expired / Lapsed
US
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Plastics shaped articles
Assignee: BXL Plastics Ltd
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Filing: 1976-11-22
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Granted: 1979-04-24
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Expires: 1996-11-22
Abstract
Abstract A plastics composition comprising an olefin polymer, a styrene or methyl-substituted styrene polymer, a butyl rubber and optionally an ethylene/vinyl polymer, which composition can be stretched to form a paper-like sheet.
Inventors
- 👤 Charles L. Geall
- 👤 Leonard Leese
- 👤 Donald C. Nicholas
- 👤 Gordon C. R. Smith
- 👤 Geoffrey F. Stokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:12
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K3/26; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0853; C08L23/18; C08L23/20; C08L23/22; C08L25/00; C08L25/02; C08L25/04; C08L2203/00; C08L2203/16; C08L2205/00; C08L2205/03; C08L2205/035; C08L2207/00; C08L2207/06; C08L2207/062; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
A plastics composition comprising: (a) 100 parts by weight of an olefin polymer selected from high density ethylene polymers, propylene polymers and mixtures thereof; (b) 5 to 100 parts by weight of a non-rubbery styrene polymer selected from styrene homopolymers, styrene copolymers containing at least 50% by weight of styrene, methyl substituted styrene homopolymers, methyl substituted styrene copolymers containing at least 50% by weight of methyl styrene, copolymers of styrene and a methyl substituted styrene and mixtures thereof per hundred parts by weight of polymer (a); (c) 0.5 to 20 parts by weight of a copolymer of isobutylene with 1 to 3% by weight of isoprene per hundred parts by weight of polymer (a); (d) 2 to 12 parts by weight of an ethylene/vinyl copolymer per hundred parts by weight of polymer (a); and, (e) a compound selected from the group consisting of a filler, a pigment and mixtures thereof per hundred parts by weight of polymer (a).
Claim 2
Dependent Claim
158 words
A plastics composition comprising: (a) 100 parts by weight of an olefin polymer selected from high density ethylene polymers, propylene polymers and mixtures thereof; (b) 5 to 100 parts by weight of a non-rubbery styrene polymer selected from styrene homopolymers, styrene copolymers containing at least 50% by weight of styrene, methyl substituted styrene homopolymers, methyl substituted styrene copolymers containing at least 50% by weight of methyl styrene, copolymers of styrene and a methyl substituted styrene and mixtures thereof per hundred parts by weight of polymer (a); (c) 0.5 to 20 parts by weight of a copolymer of isobutylene with 1 to 3% by weight of isoprene per hundred parts by weight of polymer (a); (d) 2 to 12 parts by weight of an ethylene/vinyl copolymer per hundred parts by weight of polymer (a); and, (e) a compound selected from the group consisting of a filler, a pigment and mixtures thereof per hundred parts by weight of polymer (a).
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein component (b) is a styrene homopolymer having an intrinsic viscosity of at least 0.6.
Claim 4
Dependent Claim
21 words
The composition of claim 2, wherein component (b) is a styrene homopolymer having an intrinsic viscosity of from 0.6 to 1.1.
Claim 5
Dependent Claim
29 words
The composition of claim 1, wherein component (b) is present in an amount of from 30 to 50 parts by weight per hundred parts by weight of component (a).
Claim 6
Dependent Claim
29 words
The composition of claim 1, wherein component (c) is present in an amount of from 5 to 15 parts by weight per 100 parts by weight of component (a).
Claim 7
Dependent Claim
24 words
The compositions of claim 1, wherein component (d) is selected from the group consisting of ethylene/vinyl acetate copolymers, ethylene/ethylacrylate copolymers and ethylene/acrylic acid copolymers.
Claim 8
Dependent Claim
30 words
The composition of claim 1, wherein said filler and pigment is present in an amount of up to 100 parts by weight per 100 parts by weight of component (a).
Claim 9
Dependent Claim
31 words
The composition of claim 1, wherein said filler and pigment is present in an amount of from 5 to 50 parts by weight per 100 parts by weight of component (a).
Claim 10
Dependent Claim
12 words
A stretched article made from a composition as claimed in claim 1.
Claim 11
Dependent Claim
13 words
A paper substitute made by stretching a composition as claimed in claim 1.
References Cited (Backward Citations)
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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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |