Husky Oil Operations Limited

Nova Husky Research Corporation

Zanzotto, Ludo

Zanzotto, Henrieta

Ho, Kam Wah

Ludo Zanzotto

Susanna Ho

Daryl MacLeod

James Brown

Lloyd Gee

Kam Wah Ho

Dennis P Foley

Albert J Faber

Royston B Jeffries

R David Watson

Kam Ho

Henrieta Zanzotto

John W Cheng

A process of preparing a polymer modified asphalt (PMA) comprising mixing a predetermined amount of a polymer-asphalt master batch with a predetermined amount of an asphalt-cross linking agent blend. The polymer-asphalt master batch comprises at least one polymer and a first asphalt. The asphalt-cross linking agent blend comprises a second asphalt and at least one cross linking agent. A predetermined amount of the polymer-asphalt master batch is blended with a predetermined amount of the asphalt-cross linking agent blend to form a PMA blend. Mixing of the PMA blend is performed without substantial delay following blending of the polymer-asphalt master batch with the asphalt-cross linking agent blend.

Process of polymer modified asphalt preparation

An asphalt blend used for paving is described. The blend contains polyethylene which has been modified by shearing action in the presence of an O-containing gas (such as oxygen or ozone). The blend has improved viscosity at high temperatures and reduced stiffness at low temperatures. A paving mix prepared using the asphalt blend has an improved Marshall Test Value (ASTM DI559), indicating that the paving mix should have a reduced tendency to become rutted under the load of traffic.

Asphalt/O-modified polyethylene

A novel asphaltic composition consisting of from about 2% to about 10% w/w of a hydrocracking residue which is the distillation residue obtained from a hydrocracking process of heavy crude oil in admixture with from about 98% to about 90% w/w of a conventional asphalt. These asphaltic compositions are especially useful when mixed with mineral aggregate to provide road mixes which lead to improved road construction or road paving.

Novel asphaltic composition

Growing community of inventors

Calgary, Canada

Ludo Zanzotto