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US4490432A
Expired / Lapsed
US
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Reinforced pavement-marking sheet material
Assignee: 3M Co
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Filing: 1983-11-01
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Granted: 1984-12-25
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Expires: 2003-11-01
Abstract
Abstract Pavement-marking sheet material which comprises a non-crosslinked elastomeric precursor such as acrylonitrile-butadiene polymer; a thermoplastic polymer such as polyethylene which reinforces the sheet material, e.g., by orientation of the thermoplastic polymer so that the calendered product exhibits greater tensile strength downweb than crossweb; and a particulate inorganic filler, which preferably includes platelet-type fillers such as talc, mica, or magnesium silicate.
Inventors
- 👤 Stanley J. Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:47
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/003; E; E01; E01F; E01F9/00; E01F9/50; E01F9/506; E01F9/512; B29C43/22; B29C43/24; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2105/16; B29K2223/00; B29L; B29L2007/00; B29L2007/008; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/259
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
84 words
Pavement-marking composition in sheet form comprising 100 parts of non-crosslinked elastomer precursor, at least 5 parts of a thermoplastic reinforcing polymer which is dispersed in the elastomer as a separate phase and softens at a temperature between about 75° and 200° C., and a particulate inorganic filler dispersed in the composition; said composition being processable on calendering rolls to a thickness between about 1/4 and 5 millimeters, and in sheet form having a greater tensile strength downweb than it has in the crossweb direction.
Claim 2
Dependent Claim
84 words
Pavement-marking composition in sheet form comprising 100 parts of non-crosslinked elastomer precursor, at least 5 parts of a thermoplastic reinforcing polymer which is dispersed in the elastomer as a separate phase and softens at a temperature between about 75° and 200° C., and a particulate inorganic filler dispersed in the composition; said composition being processable on calendering rolls to a thickness between about 1/4 and 5 millimeters, and in sheet form having a greater tensile strength downweb than it has in the crossweb direction.
Claim 3
Dependent Claim
13 words
Pavement-marking composition of claim 1 in which said thermoplastic reinforcing polymer comprises polyolefin.
Claim 4
Dependent Claim
18 words
Pavement-marking composition of claim 1 which has a tensile strength of at least 10 kilograms per square centimeter.
Claim 5
Dependent Claim
14 words
Pavement-marking composition of claim 1 in which the non-crosslinked elastomer precursor comprises acrylonitrile-butadiene polymer.
Claim 6
Dependent Claim
13 words
Pavement-marking composition of claim 1 in which said thermoplastic reinforcing polymer comprises polyethylene.
Claim 7
Dependent Claim
39 words
Pavement-marking composition of claim 5 in which the polyethylene is selected from linear low-density polyethylenes and high-density polyethylene having a molecular weight of at least about 20,000 and low-density polyethylene having a molecular weight of at least about 75,000.
Claim 8
Dependent Claim
26 words
Pavement-marking composition of claim 1 which further includes a thermoplastic extender resin that is miscible in, and forms a single phase with, the non-crosslinked elastomer precursor.
Claim 9
Dependent Claim
15 words
Pavement-marking composition of claim 7 in which said thermoplastic extender resin comprises a halogenated paraffin.
Claim 10
Dependent Claim
20 words
Pavement-marking composition of claims 1, 2, 5, 6, 3, 7, 4, or 8 in which the filler comprises platelet fillers.
Claim 11
Dependent Claim
132 words
Pavement-marking composition in sheet form comprising 100 parts of non-crosslinked elastomer precursor; at least 5 parts of a polyethylene reinforcing polymer which is dispersed in the elastomer as a separate phase and is selected from linear low-density polyethylene and high-density polyethylene having a molecular weight of at least about 20,000 and a low-density polyethylene having a molecular weight of at least about 75,000; and a particulate inorganic filler dispersed in the composition; said composition being processable on calendering rolls to a thickness between about 1/4 and 5 millimeters, and in sheet form having a tensile strength of at least 10 kilograms per square centimeter and an abrasion loss in the test described herein of no more than about 5 grams; the tensile strength downweb being significantly greater than the tensile strength crossweb.
Claim 12
Dependent Claim
132 words
Pavement-marking composition in sheet form comprising 100 parts of non-crosslinked elastomer precursor; at least 5 parts of a polyethylene reinforcing polymer which is dispersed in the elastomer as a separate phase and is selected from linear low-density polyethylene and high-density polyethylene having a molecular weight of at least about 20,000 and a low-density polyethylene having a molecular weight of at least about 75,000; and a particulate inorganic filler dispersed in the composition; said composition being processable on calendering rolls to a thickness between about 1/4 and 5 millimeters, and in sheet form having a tensile strength of at least 10 kilograms per square centimeter and an abrasion loss in the test described herein of no more than about 5 grams; the tensile strength downweb being significantly greater than the tensile strength crossweb.
Claim 13
Dependent Claim
12 words
Pavement-marking composition of claims 1 or 10 having an embossed top surface.
Claim 14
Dependent Claim
14 words
Pavement-marking composition of claim 10 in which the non-crosslinked elastomer precursor comprises acrylonitrile-butadiene polymer.
Claim 15
Dependent Claim
26 words
Pavement-marking composition of claim 10 which further includes a thermoplastic extender resin that is miscible in, and forms a single phase with, the non-crosslinked elastomer precursor.
Claim 16
Dependent Claim
14 words
Pavement-marking composition of claim 13 in which said extender resin comprises a halogenated paraffin.
Claim 17
Dependent Claim
14 words
Pavement-marking composition of claim 14 in which the non-crosslinked elastomer precursor comprises acrylonitrile-butadiene polymer.
Claim 18
Dependent Claim
17 words
Pavement-marking composition of claims 10, 13, 14, 12 or 15 in which the filler comprises platelet fillers.
Claim 19
Dependent Claim
24 words
Pavement-marking composition of claims 10, 13, 14, 12 or 15 in which the filler is selected from magnesium silicate, talc or mica filler particles.
References Cited (Backward Citations)
US4069281A
Cited
US4117192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |