Bituminous composition with improved...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

Reexamination Certificate

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C524S059000, C524S069000, C524S070000, C524S071000

Reexamination Certificate

active

06949593

ABSTRACT:
Disclosed is a bituminous composition that comprises a bituminous component (A), an elastomer component (B), preferably a block copolymer of a conjugated diene and a monovinylaromatic hydrocarbon, and an additive (C), wherein the additive is a compound of the general formulain-line-formulae description="In-line Formulae" end="lead"?Ar—R—Ar  (I)in-line-formulae description="In-line Formulae" end="tail"?wherein each “Ar” independently is a benzene ring or fused aromatic ring system of 6 to 20 carbon atoms, substituted by at least one hydroxyl group, and “R” is an optionally substituted divalent radical comprising 6 to 20 atoms in the backbone and at least one amide and/or ester group in the backbone. These compositions are disclosed to be particularly useful in the preparing and repair of roofing.

REFERENCES:
patent: 4247427 (1981-01-01), Edinger
patent: 4485201 (1984-11-01), Davis
patent: 4755545 (1988-07-01), Lalwani
patent: 4923913 (1990-05-01), Chich et al.
patent: 4994508 (1991-02-01), Shiraki et al.
patent: 5326798 (1994-07-01), Danese
patent: 6607679 (2003-08-01), Handa et al.
patent: 6720376 (2004-04-01), Itoh et al.

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