Method for preparing difurfurylideneacetone oligomer

Details Method for preparing difurfurylideneacetone oligomer Method for preparing difurfurylideneacetone oligomer

1980-04-02

1981-07-28

Demers, Arthur P.

Harness for working animal

2603478, 525521, 525940, 542438, C07D40914

Patent

active

042811147

ABSTRACT:
A method for preparing difurfurylideneacetone oligomer which comprises heating difurfurylideneacetone with a moisture content of 15 to 40% at a temperature ranging from 80.degree. to 90.degree. C. under progressively increasing vacuum from the atmospheric pressure to 180-200 mm Hg, followed by the addition of a catalyst; as the latter use is made of hydroxides of alkali and/or alkali-earth metals at a weight ratio of difurfurylideneacetone to the catalyst of 1:0.005-0.04; then oligomerization of difurfurylideneacetone is carried out at a temperature ranging from 180.degree. to 220.degree. C.

REFERENCES:
patent: 2853469 (1958-09-01), Rosamilia
patent: 2853470 (1958-09-01), Rosamilia
Korshak et al., Chem. Abstracts 90(1979) #169474.
Korolkov et al., Chem. Abstracts 70(1969) #88368.
Kamenskii et al., Chem. Abstracts 55(1960) col. 11907.
Kulakov et al., Chem. Abstracts 75(1971) #77355.

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