Using branched polymers to improve the storage stability of acid

Details Using branched polymers to improve the storage stability of acid Using branched polymers to improve the storage stability of acid

1990-05-02

1992-03-10

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 68, 524 69, 524 70, 524 71, C08L 9500

Patent

active

050950550

ABSTRACT:
This invention relates to a composition and method for improving the storage stability of acid treated polymer modified asphalts. More specifically, the storage stability of an asphalt which contains greater than 1.0 wt. % polymer can be improved by adding a branched, rather than a non-branched, polymer to an asphalt which has previously been reacted with an inorganic acid. The storage stable acid treated branched polymer modified asphalt thus produced is particularly well suited for use as a binder in paving materials and as a coating or saturant for roofing shingles.

REFERENCES:
patent: 4440886 (1984-04-01), Kraus
patent: 4460723 (1984-07-01), Rollmann
patent: 4882373 (1989-11-01), Moran

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