EP0206670A2
Expired / Lapsed
EP
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Intersection markings
Assignee: 3M Co
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Filing: 1986-06-12
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Granted: —
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Expires: 2006-06-12
Abstract
Abstract Pavement-marking sheet materials of increased durability comprise a tough, abrasion-resistant top layer, preferably a polyurethane film having substantial flexibility but including trifunctional hydroxyl-terminated components of short molecular weight so as to obtain a significant degree of crosslinking, and a conformable underlying layer. A preferred underlying layer comprises unvulcanized elastomer precursor.
Inventors
- 👤 Asok C/O Minnesota Mining And Sengupta
- 👤 John L. C/O Minnesota Mining And Ethen
- 👤 Stanley J. C/O Minnesota Mining And Jordan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; B; B32; B32B; B32B27/00; B32B27/18; A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; B32B27/06; B32B27/08; B32B27/40; B32B7/00; B32B7/04; B32B7/12; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1825; C08G18/28; C08G18/40; C08G18/42; C08G18/4202; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664; C08G18/70; C08G18/72; C08G18/73; C08G18/74; C08G18/75; E; E01; E01F; E01F9/00; E01F9/50; E01F9/506; E01F9/512; B32B2307/00; B32B2307/50; B32B2307/582; B32B2307/5825; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31855
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
89 words
Pavement-marking sheet material, the top surface of which is provided by a polymeric film that comprises aliphatic isocyanate-terminated component and hydroxyl-terminated component reacted to an infusible and insoluble polyurethane reaction product, characterized in that at least 10 percent of the hydroxyl equivalents are provided by hydroxyl-terminated component having at least three hydroxyl groups per molecule, the hydroxyl-terminated component has a number-average molecular weight of about 1,200 or less, and the film has sufficient flexibility so that it can be wrapped around a two-centimeter-diameter mandrel at room temperature without cracking.
Claim 2
Dependent Claim
89 words
Pavement-marking sheet material, the top surface of which is provided by a polymeric film that comprises aliphatic isocyanate-terminated component and hydroxyl-terminated component reacted to an infusible and insoluble polyurethane reaction product, characterized in that at least 10 percent of the hydroxyl equivalents are provided by hydroxyl-terminated component having at least three hydroxyl groups per molecule, the hydroxyl-terminated component has a number-average molecular weight of about 1,200 or less, and the film has sufficient flexibility so that it can be wrapped around a two-centimeter-diameter mandrel at room temperature without cracking.
Claim 3
Dependent Claim
52 words
Sheet material of claim 1 in which the hydroxyl-terminated component comprises polycaprolactone, polycarbonate, or polyether polymeric segments, at least 25 percent of the hydroxyl equivalents being provided by hydroxyl-terminated components of at least three hydroxyl groups per molecule, and .the hydroxyl-terminated component having a number-average molecular weight of about 1,000 or less.
Claim 4
Dependent Claim
21 words
Sheet material of claim 1 or 2 in which the polymeric film has a thickness of at least about one-third millimeter.
Claim 5
Dependent Claim
23 words
Sheet material of any of claims 1-3 in which transparent microspheres are partially embedded in and partially exposed out of the polymeric film.
Claim 6
Dependent Claim
15 words
Sheet material of claim 4 in which additional microspheres are dispersed throughout the polymeric film.
Claim 7
Dependent Claim
23 words
Sheet material of any of claims 1-5 in which antiskid granules are partially embedded in and partially exposed out of the polymeric film.
Claim 8
Dependent Claim
16 words
Sheet material of claim 6 in which additional antiskid granules are dispersed throughout the polymeric film.
Claim 9
Dependent Claim
20 words
Sheet material of any of claims 1-7 in which the reaction product of the polymeric film further includes tertiary amine.
Claim 10
Dependent Claim
28 words
Sheet material of claim 8 in which the tertiary amine comprises N-(t-butyl)diethanolamine in an amount equal to at least 0.5 hydroxyl equivalent for each equivalent of hydroxyl-terminated diol.
Claim 11
Dependent Claim
36 words
Sheet material of any of claims 1-9 in which the top layer exhibits a Taber abrasion loss using an H-22 abrader wheel with a 1,000-gram weight and 1,000 cycles of no more than about one-half gram.
Claim 12
Dependent Claim
49 words
Sheet material of any of claims 1-10 which further includes a conformable polymeric layer underlying the top layer that will undergo a penetration in the penetration creep-recovery test described herein of at least 0.05 millimeter, and recovers no more than 65 percent of the penetration depth after two minutes.
Claim 13
Dependent Claim
14 words
Sheet material of claim 11 in which the underlying layer comprises unvulcanized elastomer precursor.
Claim 14
Dependent Claim
19 words
Sheet material of claim 11 or 12 in which the underlying layer is at least about one-fourth millimeter thick.
Claim 15
Dependent Claim
26 words
Sheet material of any of claims 11-13 in which the top layer undergoes a penetration in the creep-recovery test described herein of less than 0.05 millimeter.
Claim 16
Dependent Claim
17 words
Sheet material of any of claims 11-14 in which the underlying layer is free of transparent microspheres.
Claim 17
Dependent Claim
19 words
Sheet material of any of claims 11-15 in which a layer of adhesive is included under the underlying layer.
Claim 18
Dependent Claim
21 words
Sheet material of any of claims 11-16 in which the underlying layer can be stretched at least 50 percent before break.
Claim 19
Dependent Claim
16 words
Sheet material of any of claims 1-17 that exhibits a tear resistance of at least 5kN/m.
Claim 20
Dependent Claim
17 words
Sheet material of any of claims 1-18 that exhibits an impact resistance of at least 2 joules.
Claim 21
Dependent Claim
16 words
Sheet material of any of claims 1-19 in which the hydroxyl-terminated ingredients include a monomeric diol.
Claim 22
Dependent Claim
116 words
Pavement-marking sheet material comprising a polymeric top layer and an underlying polymeric layer, characterized in that the top layer exhibits a Taber abrasion loss using an H-22 abrader wheel with a 1,000- gram weight and 1,000 cycles of no more than about one-half gram, and exhibits sufficient flexibility so that it can be wrapped around a two-centimeter-diameter mandrel at room temperature without cracking; particulate material selected from transparent microspheres and antiskid granules being partially embedded in and partially protruding from the top layer; and the underlying layer undergoing a penetration in the penetration creep-recovery test described herein of at least 0.05 millimeter, and recovering no more than 65 percent of the penetration depth after two minutes.
Claim 23
Dependent Claim
116 words
Pavement-marking sheet material comprising a polymeric top layer and an underlying polymeric layer, characterized in that the top layer exhibits a Taber abrasion loss using an H-22 abrader wheel with a 1,000- gram weight and 1,000 cycles of no more than about one-half gram, and exhibits sufficient flexibility so that it can be wrapped around a two-centimeter-diameter mandrel at room temperature without cracking; particulate material selected from transparent microspheres and antiskid granules being partially embedded in and partially protruding from the top layer; and the underlying layer undergoing a penetration in the penetration creep-recovery test described herein of at least 0.05 millimeter, and recovering no more than 65 percent of the penetration depth after two minutes.
Claim 24
Dependent Claim
19 words
Pavement-marking sheet material of claim 21 in which the top layer comprises an infusible and insoluble polyurethane reaction product.
Claim 25
Dependent Claim
17 words
Pavement-marking sheet material of claim 21 or 22 in which the underlying layer comprises unvulcanized elastomer precursor.
Claim 26
Dependent Claim
20 words
Pavement-marking sheet material of any of claims 21-23 in which the underlying layer is at least about one-fourth millimeter thick.
Claim 27
Dependent Claim
27 words
Pavement-marking sheet material of any of claims 21-24 in which the top layer undergoes a penetration in the creep-recovery test described herein of less than 0.05 millimeter.
Claim 28
Dependent Claim
23 words
Pavement-marking sheet material of any of claims 21-25 in which the top layer exhibits an abrasion loss of no more than 0.1 gram.
Claim 29
Dependent Claim
18 words
Pavement-marking sheet material of any of claims 21-26 in which the underlying layer is free of transparent microspheres.
Claim 30
Dependent Claim
20 words
Pavement-marking sheet material of any of claims 21-27 in which a layer of adhesive is included under the underlying layer.
Claim 31
Dependent Claim
24 words
Pavement-marking sheet material of any of claims 21-28 in which antiskid granules also are partially embedded in and partially protrude from the top layer.
Claim 32
Dependent Claim
17 words
Pavement-marking sheet material of claim 29 in which antiskid granules are also dispersed throughout the top layer.
Claim 33
Dependent Claim
16 words
Sheet material of any of claims 21-30 that exhibits a tear resistance of at least 5kN/m.
Claim 34
Dependent Claim
17 words
Sheet material of any of claims 21-31 that exhibits an impact resistance of at least 2 joules.
Claim 35
Dependent Claim
109 words
Pavement-marking sheet material comprising a polymeric top layer and a polymeric underlying layer, characterized in that the top layer exhibits a tear resistance of at least 5 kN/m, and an impact resistance of at least 2 joules, and exhibits sufficient flexibility so that it can be wrapped around a two-centimeter-diameter mandrel at room temperature without cracking; particulate material selected from transparent microspheres and antiskid granules being partially embedded in and partially protruding from the top layer; and the underlying layer undergoing a penetration in the penetration creep-recovery test described herein of at least 0.05 millimeter, and recovering no more than 65 percent of the penetration depth after two minutes.
Claim 36
Dependent Claim
109 words
Pavement-marking sheet material comprising a polymeric top layer and a polymeric underlying layer, characterized in that the top layer exhibits a tear resistance of at least 5 kN/m, and an impact resistance of at least 2 joules, and exhibits sufficient flexibility so that it can be wrapped around a two-centimeter-diameter mandrel at room temperature without cracking; particulate material selected from transparent microspheres and antiskid granules being partially embedded in and partially protruding from the top layer; and the underlying layer undergoing a penetration in the penetration creep-recovery test described herein of at least 0.05 millimeter, and recovering no more than 65 percent of the penetration depth after two minutes.
Claim 37
Independent Claim
20 words
A method for marking a paved surface comprising adhering sheet material of any of claims 1-33 to the paved surface.
References Cited (Backward Citations)
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