EP0072042B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Preformed membrane comprising a bitumen/thermoplastic rubber layer
Assignee: Shell Internationale Research Maatschappij BV
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Filing: 1982-06-08
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Granted: 1986-05-07
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Expires: 2002-06-08
Abstract
Abstract A preformed membrane, suitable for road surfacing, comprising a layer of a mixture of bitumen, a linear styrene/conjugated diene block copolymer and a branched styrene/conjugated diene block copolymer.
Inventors
- 👤 Peter Lewis Barlow
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 05:40
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/18; E01C7/26; E01C7/265; E01C5/00; E01C5/22; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/141; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/60; Y10T442/693
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
A preformed membrane, suitable for road surfacing, comprising a layer of a mixture of bitumen, a linear styrene/conjugated diene block copolymer and a star block copoiymer of styrene and a conjugated diene, having the formula A―B(̵B―A) n , wherein A represents a polystyrene block, B represents a polyconjugated diene block and n is an integer up to 5, in which star block copolymer the conjugated diene is butadiene, characterized in that the linear copolymer has the formula A-B-A, being a polystyrene/polyisoprene/polystyrene copolymer, and in that the polystyrene blocks A have a molecular weight of 7,500 to 100,000 and the polyconjugated diene blocks B have a molecular weight of 25,000 to 1,000,000.
Claim 2
Dependent Claim
111 words
A preformed membrane, suitable for road surfacing, comprising a layer of a mixture of bitumen, a linear styrene/conjugated diene block copolymer and a star block copoiymer of styrene and a conjugated diene, having the formula A―B(̵B―A) n , wherein A represents a polystyrene block, B represents a polyconjugated diene block and n is an integer up to 5, in which star block copolymer the conjugated diene is butadiene, characterized in that the linear copolymer has the formula A-B-A, being a polystyrene/polyisoprene/polystyrene copolymer, and in that the polystyrene blocks A have a molecular weight of 7,500 to 100,000 and the polyconjugated diene blocks B have a molecular weight of 25,000 to 1,000,000.
Claim 3
Dependent Claim
16 words
A membrane according to claim 1, characterized in that the layer is reinforced with a fabric.
Claim 4
Dependent Claim
28 words
A membrane according to claim 1 or 2, characterized in that one side of the layer is provided with a release paper and the other side with aggregates.
Claim 5
Dependent Claim
23 words
The use of a membrane according to one of claims 1-3 on a surface after having applied a tack coat on this surface.
Claim 6
Dependent Claim
98 words
A mixture of bitumen, a linear styrene/conjugated diene block copolymer and a star block copolymer of styrene and a conjugated diene, having the formula A―B-(-B―A)n, wherein A represents a polystyrene block, B represents a polyconjugated diene block and n is an integer up to 5, in which star block copolymer the conjugated diene is butadiene, characterized in that the linear copolymer has the formula A-B-A, being a polystyrene/polyisoprene/polystyrene copolymer, and in that the polystyrene blocks A have a molecular weight of 7,500 to 100,000 and the polyconjugated diene blocks B have a molecular weight of 25,000 to 1,000,000.
Claim 7
Dependent Claim
98 words
A mixture of bitumen, a linear styrene/conjugated diene block copolymer and a star block copolymer of styrene and a conjugated diene, having the formula A―B-(-B―A)n, wherein A represents a polystyrene block, B represents a polyconjugated diene block and n is an integer up to 5, in which star block copolymer the conjugated diene is butadiene, characterized in that the linear copolymer has the formula A-B-A, being a polystyrene/polyisoprene/polystyrene copolymer, and in that the polystyrene blocks A have a molecular weight of 7,500 to 100,000 and the polyconjugated diene blocks B have a molecular weight of 25,000 to 1,000,000.
References Cited (Backward Citations)
No citation records indexed.
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