US4154710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing novel bitumen compositions
Assignee: Koch Enterprises Inc
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Filing: 1977-09-15
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Granted: 1979-05-15
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Expires: 1997-09-15
Abstract
Abstract A method of preparing novel bitumen compositions which comprises a first step wherein an olefinic unsaturated organic compound having a molecular weight varying between 300 and 30,000 is added to a bitumen having a penetration value varying between 30 and 220, and a second step wherein a polymer having a molecular weight varying between 100,000 and 2,000,000 is added to the product obtained from said first step.
Inventors
- 👤 Paul Maldonado
- 👤 Robert Leger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:38
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A method for preparing novel bitumen compositions which comprises: (a) adding to a bitumen having a penetration value between 30 and 220, an olefinically unsaturated compound having a molecular weight between 300 and 30,000, at a temperature from 140° to 230° C. for at least 10 hours; (b) intermixing at a temperature from 140° to 230° C., a thermoplastic elastomer having a molecular weight between 100,000 and 2,000,000 with the product of step (a) whereby a bitumen having improved properties is formed.
Claim 2
Independent Claim
82 words
A method for preparing novel bitumen compositions which comprises: (a) adding to a bitumen having a penetration value between 30 and 220, an olefinically unsaturated compound having a molecular weight between 300 and 30,000, at a temperature from 140° to 230° C. for at least 10 hours; (b) intermixing at a temperature from 140° to 230° C., a thermoplastic elastomer having a molecular weight between 100,000 and 2,000,000 with the product of step (a) whereby a bitumen having improved properties is formed.
Claim 3
Dependent Claim
68 words
The method of claim 1 wherein said olefinically unsaturated compound is represented by the formula ##STR2## wherein R 1 , R 2 and R 3 are each hydrogen or methyl and at least one of said groups is methyl, R is a substantially hydrocarbon radical which may contain cyclic or functional groups, said R being such that the molecular weight of the composition is between 300 and 30,000.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein said step (a) is carried out in the presence of sulfur.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein said olefinically unsaturated compound is an olefinic polymer having a molecular weight between 400 and 2,000.
Claim 6
Dependent Claim
20 words
The method of claim 3 wherein said olefinically unsaturated compound is a mixture of fatty acid esters of higher alcohols.
Claim 7
Dependent Claim
12 words
The method of claim 9 wherein the thermoplastic elastomer is substantially linear.
Claim 8
Dependent Claim
12 words
The method of claim 1 wherein said thermoplastic elastomer contains cyclic moieties.
Claim 9
Dependent Claim
24 words
The method of claim 1 where said olefinically unsaturated compound is a linear olefinic polymer and said thermoplastic elastomer is a linear olefinic polymer.
Claim 10
Dependent Claim
18 words
The method of claim 1 wherein said olefinically unsaturated compound and said thermoplastic elastomer each contain cyclic moieties.
Claim 11
Dependent Claim
10 words
A bitumen composition product of the process of claim 1.
References Cited (Backward Citations)
US3547850A
Cited
US3644240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |