US4145322A
Expired / Lapsed
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Process for preparing bitumen-polymer compositions
Assignee: Koch Enterprises Inc
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Filing: 1977-12-28
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Granted: 1979-03-20
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Expires: 1997-12-28
Abstract
Abstract The present invention is related to a novel process for preparing bitumen-polymer compositions. These compositions contain block copolymers comprising diene and styrene groups. The compositions present excellent mechanical properties even at low temperatures.
Inventors
- 👤 Paul Maldonado
- 👤 Jean Mas
- 👤 Trung K. Phung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:14
CPC Classifications
C; C08; C08L; C08L95/00; C08K; C08K3/00; C08K3/02; C08K3/06; C08L53/00; C08L53/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
125 words
A process for obtaining a bitumen-polymer composition which consists in contacting with each other, at a temperature between 130° and 230° C., 80 to 98% by weight of a bitumen exhibiting a penetration value between 30 and 220, and 2 to 20% by weight of a block copolymer, with an average molecular weight between 30,000 and 300,000 having the theoretical formula S x - B y in which: S corresponds to the styrene structure groups, B corresponds to the conjugated diene structure groups, x and y are integers, stirring the obtained mixture for at least two hours, then adding 0.1 to 3% by weight of elemental sulphur with respect to the bitumen and maintaining the mixture thus obtained under agitation for at least 20 minutes.
Claim 2
Dependent Claim
125 words
A process for obtaining a bitumen-polymer composition which consists in contacting with each other, at a temperature between 130° and 230° C., 80 to 98% by weight of a bitumen exhibiting a penetration value between 30 and 220, and 2 to 20% by weight of a block copolymer, with an average molecular weight between 30,000 and 300,000 having the theoretical formula S x - B y in which: S corresponds to the styrene structure groups, B corresponds to the conjugated diene structure groups, x and y are integers, stirring the obtained mixture for at least two hours, then adding 0.1 to 3% by weight of elemental sulphur with respect to the bitumen and maintaining the mixture thus obtained under agitation for at least 20 minutes.
Claim 3
Dependent Claim
20 words
A process according to claim 1, characterized in that the block copolymer has a molecular weight between 70,000 and 200,000.
Claim 4
Dependent Claim
16 words
A process according to either claim 1, characterized in that the block copolymer is di-block copolymer.
Claim 5
Dependent Claim
21 words
A process according to either claim 1, characterized in that the block copolymer is a tri-sequential or tri- or polyblock copolymer.
Claim 6
Dependent Claim
21 words
A process according to claim 1, characterized in that the block copolymer contains 10 to 60% by weight of styrene groups.
Claim 7
Dependent Claim
21 words
A process according to claim 5, characterized in that the block copolymer contains 15 to 30% by weight of styrene groups.
Claim 8
Dependent Claim
18 words
A process according to claim 1 characterized in that the conjugated diene is butadiene, isoprene or mixtures thereof.
Claim 9
Dependent Claim
14 words
A process according to claim 1, characterized in that the conjugated diene is isoprene.
Claim 10
Dependent Claim
15 words
Bitumen-polymer compositions characterized in that they are obtained according to the process of claim 1.
Claim 11
Dependent Claim
79 words
A bitumen-polymer composition comprising 80 to 98% by weight of a bitumen having a penetration value between 30 and 220, and 2 to 20% by weight of a block copolymer, with an average molecular weight between 30,000 and 300,000 having the theoretical formula S x - B y in which: S corresponds to the styrene structure groups, B corresponds to the conjugated diene structure groups and x and y are integers, and 0.1 to 3% by weight of sulphur.
Claim 12
Dependent Claim
79 words
A bitumen-polymer composition comprising 80 to 98% by weight of a bitumen having a penetration value between 30 and 220, and 2 to 20% by weight of a block copolymer, with an average molecular weight between 30,000 and 300,000 having the theoretical formula S x - B y in which: S corresponds to the styrene structure groups, B corresponds to the conjugated diene structure groups and x and y are integers, and 0.1 to 3% by weight of sulphur.
Claim 13
Dependent Claim
18 words
A composition according to claim 10 wherein the block copolymer has a molecular weight between 70,000 and 200,000.
Claim 14
Dependent Claim
17 words
A composition according to claim 10 wherein the block copolymer is a di-, tri- or polyblock copolymer.
Claim 15
Dependent Claim
20 words
A composition according to claim 12 wherein the molecular weight of the tri-block or polyblock copolymer is at least 120,000.
Claim 16
Dependent Claim
19 words
A composition according to claim 12 wherein the molecular weight of the di-block copolymer is between 30,000 and 120,000.
Claim 17
Dependent Claim
19 words
A composition according to claim 10 wherein the block copolymer contains 10 to 60% by weight of styrene groups.
Claim 18
Dependent Claim
23 words
A composition according to claim 10 wherein the block copolymer is a butadiene-styrene di-block copolymer with a butadiene/styrene ratio of 70/25, by weight.
Claim 19
Dependent Claim
23 words
A composition according to claim 10 wherein the block copolymer is a tri-block butadiene-styrene copolymer with a butadiene/styrene ratio of 70/30, by weight.
Claim 20
Dependent Claim
23 words
A composition according to claim 10 wherein the block copolymer is a di-block styrene-isoprene copolymer with an isoprene/styrene ratio of 83/17, by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |