Polybutadienediol purification

Details Polybutadienediol purification Polybutadienediol purification

1979-11-13

1981-05-26

Henderson, C. A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

5263401, 528501, C08F 610, C08C 202

Patent

active

042699690

ABSTRACT:
Butadiene is polymerized using hydrogen peroxide as a catalyst to provide polybutadiene (partaking of the nature of a polymethylenediol) suitable for use in making polyurethanes by reaction with diisocyanate compounds. Minor amounts of vinyl cyclohexene and related odiferous impurities are contaminants in such polybutadiene. Such contaminants are predominantly removed by selective volatilization during one or more treatments in a hot vacuum zone, the feedstock to the hot vacuum zone containing from about 0.4 to about 6% of a C.sub.9 --C.sub.13 saturated hydrocarbon entraining agent.

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patent: 2844568 (1958-07-01), Mertz
patent: 3412779 (1968-11-01), Wagner
patent: 3562227 (1971-02-01), di Drusco
patent: 3673168 (1972-06-01), Burke, Jr.
patent: 3920624 (1975-11-01), Humkey
patent: 4186047 (1980-01-01), Salmon

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