Method for producing industrial asphalts without air-blowing usi

Details Method for producing industrial asphalts without air-blowing usi Method for producing industrial asphalts without air-blowing usi

1984-10-31

1986-11-18

Yarbrough, Amelia B.

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

208 40, 208 44, C08L 9500

Patent

active

046233954

ABSTRACT:
Disclosed is a one-step method of producing an industrial asphalt from a bituminous material which comprises mixing together without air-blowing:
(a) a feed material comprising a bituminous material having a viscosity of at least 50 centistokes at 350 degrees Fahrenheit and wherein the feed material forms a single phase when mixed with 5 weight percent maleic anhydride; and
(b) from about 0.1 to 20.0 percent by weight of maleic anhydride, said mixing being done at a temperature in the range of 351 to 600 degrees Fahrenheit, whereby the softening point of the feed is substantially increased and the penetration is significantly decreased.

REFERENCES:
patent: 3120486 (1964-02-01), Braunwarth et al.

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