Asphaltic elastomers

Details Asphaltic elastomers Asphaltic elastomers

1986-07-22

1988-06-21

Lieberman, Allan M.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 71, 525 545, C08L 7508, C08L 9500

Patent

active

047526327

ABSTRACT:
Disclosed is an asphaltic elastomer and a method for its preparation. The asphaltic elastomer is synthesized from ingredients which are blended. These ingredients include an aqueous asphaltic phase, a polyisocyanate prepolymer, and optionally an organic cosolvent effective in compatibilizing the polyisocyanate prepolymer and water. The proportion of water from the asphaltic phase or as added being such that the molar ratio of water to isocyanate groups is greater than 1. The polyisocyanate prepolymer is formed from the reaction of an organic polyisocyanate and an organic polyether polyol containing at least about 40 weight percent ethylene oxide units.

REFERENCES:
patent: 3778397 (1973-12-01), Gannon et al.
patent: 3932331 (1976-01-01), Doi et al.
patent: 4415702 (1983-11-01), Ono et al.

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