The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1993
Filed:
May. 14, 1992
Applicant:
Inventors:
Michael A Masse, Richmond, TX (US);
James H Collins, Houston, TX (US);
Daniel B England, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524 68 ; 1062731 ; 1062842 ; 106285 ; 10628735 ; 524 71 ; 525 545 ; 525314 ;
Abstract
A bitumen composition is provided which contains a block copolymer of one or more halogenated vinyl aromatic blocks and one or more conjugated diolefin blocks. The composition does not phase separate upon storage for five days at 160.degree. C. and has excellent ductility and elasticity. The utilization of halogenated block copolymers also results in improved high service temperature viscosity and moduli with excellent resistance to thermal cracking at low service temperatures. The block copolymer is preferably a hydrogenated block copolymer. The bitumen is preferably halogenated.