Use of zinc oxide to improve compatibility of polymer...

Details Use of zinc oxide to improve compatibility of polymer... Use of zinc oxide to improve compatibility of polymer...

2008-04-29

2008-04-29

Szekely, Peter (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S070000, C524S071000

Reexamination Certificate

active

07365111

ABSTRACT:
In methods of preparing asphalt and elastomeric polymer compositions crosslinked with phenol aldehyde resins and sulfur, such as polymer modified asphalt (PMA), it has been discovered that the MP1 compatibility may be improved by adding certain ionic metal oxides. Suitable ionic metal oxides include, but are not necessarily limited to, zinc oxide, cadmium oxide, and the like. Acceptable elastomeric polymers include, but are not necessarily limited to, styrene-butadiene copolymers. Additional sulfur-containing crosslinkers may also be used.

REFERENCES:
patent: 5256710 (1993-10-01), Krivohlavek
patent: 7081492 (2006-07-01), Krivohlavek
Grant & Hackh's Chemical Dictonary, Fifth Edition, McGraw-Hill Book Company, 1987, p. 516.
SUPERPAVE Series No. 1 (SP-1), 1997 printing, pp. ii-67, published by Asphalt Institute (Research Park Drive, P.O. Box 14052, Lexington, KY 40512-4052).

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