Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue
Patent
1995-09-08
1996-08-27
Brunsman, David
Compositions: coating or plastic
Coating or plastic compositions
Bituminous material or tarry residue
1062844, 524 59, 524 68, 524 70, 524 71, C09D19500, C08L 9500
Patent
active
055497446
ABSTRACT:
The present invention provides for a method of making storage stable road paving binders by blending a minor amount of a polymer having at least one diene monomer with a major amount of asphalt containing at least 0.3% by weight of total nitrogen at an elevated temperature such that the components are sufficiently fluid to blend; treating the asphalt-polymer blend using not more than 250 meq of a sulfonating agent per 100 g of asphalt-polymer blend to introduce the corresponding acid functionality into the blend; maintaining the sulfonated asphalt-polymer blend at a sufficiently elevated temperature and stripping the sulfonated blend with sufficient chemically unreactive gas to remove a major fraction of the acid functionality introduced by sulfonation. The invention also provides for the compositions made by the process. These are useful as binders in road paving applications.
REFERENCES:
patent: 5248407 (1993-09-01), Bardet et al.
patent: 5348994 (1994-09-01), Gorbaty et al.
Evers Larry J.
Gorbaty Martin L.
Nahas Nicholas C.
Puzic Olga
Williamson Kenneth E.
Brunsman David
Exxon Research and Engineering Company
Scuorzo Linda M.
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