Bitumen-polymer stabilizer, stabilized bitumen-polymer compositi

Details Bitumen-polymer stabilizer, stabilized bitumen-polymer compositi Bitumen-polymer stabilizer, stabilized bitumen-polymer compositi

1991-09-30

1994-01-18

Kight, III, John

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524 59, C08L 9500

Patent

active

052800644

ABSTRACT:
A stabilizer for bitumen-polymer compositions. Polyethylene-bitumen compositions having the polyethylene component dispersed throughout the solution and stabilized against gross phase separation are described. A method for preparation of the stabilizer includes vulcanization of a bitumen and amine-terminated poly(butadiene-co-acrylonitrile). Carboxylated polyethylene is coupled with the vulcanization product to obtain the stabilizer. Polyethylene dispersed in bitumen containing the stabilizer does not undergo gross phase separation and droplets in the 1 to 5 micron range are observed microscopically.

REFERENCES:
patent: 4818367 (1989-04-01), Winkler

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