EP0001440A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Asphaltic concrete compositions comprising diene/vinyl aromatic copolymers
Assignee: Phillips Petroleum Co
•
Filing: 1978-09-29
•
Granted: —
•
Expires: 1998-09-29
Abstract
Abstract Improved asphalt-containing compositions having excellent flexural fatigue test characteristics are prepared by incorporating into the mix during its preparation at least one diene/vinyl aromatic copolymer, said copolymer being a radial teleblock copolymer wherein the teleblock copolymer has a diene/vinyl aromatic weight ratio of about 60/40 to about 90/10 and a weight average molecular weight range of from about 130 000 to 300 000.
Inventors
- 👤 Clarence Richard Bresson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 19:54
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/18; E01C7/26; E01C7/265; C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
An asphaltic concrete composition containing an asphalt, a mineral aggregate and a copolymer of a conjugated diene and a vinyl-substituted arene characterized in that said copolymer is a radial teleblock copolymer represented by the formula. wherein A represents a polyvinyl-aromatic block from a vinyl-substituted aromatic compound having 8 to 18 carbon atoms per molecule; B represents a polydiene block from a conjugated diene having 4 to 12 carbon atoms per molecule; Y represents a radical derived from a multifunctional coupling agent and x is a number of 3 or more and represents the number of functional groups of the multifunctional coupling agent.
Claim 2
Dependent Claim
102 words
An asphaltic concrete composition containing an asphalt, a mineral aggregate and a copolymer of a conjugated diene and a vinyl-substituted arene characterized in that said copolymer is a radial teleblock copolymer represented by the formula. wherein A represents a polyvinyl-aromatic block from a vinyl-substituted aromatic compound having 8 to 18 carbon atoms per molecule; B represents a polydiene block from a conjugated diene having 4 to 12 carbon atoms per molecule; Y represents a radical derived from a multifunctional coupling agent and x is a number of 3 or more and represents the number of functional groups of the multifunctional coupling agent.
Claim 3
Dependent Claim
33 words
A composition of claim 1) characterized in that the radial teleblock copolymer has a diene/styrene weight ratio of 60/40 to 90/10 and a weight average molecular weight range of from 150,000 to 300,000.
Claim 4
Dependent Claim
37 words
A composition according to claim 1) or 2) wherein the diene/styrene weight ratio of the teleblock copolymer is in the range 80/20 to 85/15 and the weight average molecular weight is in the range 190,000 to 300,000.
Claim 5
Dependent Claim
31 words
A composition according to one of claims 1) to 3) characterized in that the conjugated diene is selected from 1,3-butadiene and isoprene or mixtures thereof and the vinyl monomer is styrene.
Claim 6
Dependent Claim
21 words
A composition according to claim 1) wherein the polymer weight average molecular weight is in the approximate range 50,000 - 500,000.
Claim 7
Dependent Claim
32 words
A composition according to one of claims 1) to 5) characterized by and by the provision that 2 to 15 parts by weight copolymer be present per 100 parts by weight asphalt.
Claim 8
Dependent Claim
38 words
A process for making a composition according to one of claims 1) to 6) characterized by admixing the asphalt and the copolymer to obtain a homogeneous dispersion followed by admixing the mineral aggregate with the dispersion thus obtained.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.