Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1993-12-03
1995-05-09
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568716, 568717, C07C 39215
Patent
active
054141508
ABSTRACT:
4,4'-Dihydroxy-alpha-alkylstilbenes of high purity are prepared by reacting at a temperature of from about -20.degree. C. to about 20.degree. C. a mixture of (1) at least one alpha-haloketone, (2) at least one phenolic hydroxyl-containing compound or alkoxy-containing aromatic compound, and (3) at least one strong protonic acid or Lewis acid; such that the mole ratio of phenolic hydroxyl-containing compound or alkoxy-containing aromatic compound:alpha-haloketone(s) is from 0.1:1 to 1.9:1, and the mole ratio of phenolic hydroxyl-containing compound or alkoxy-containing aromatic compound:alpha-haloketone(s):strong protonic acid or Lewis acid is from about 0.1:1:0.0026 to about 1.9:1:0.95. The high purity 4,4'-dihydroxy-alpha-alkylstilbenes are useful for the advancement of epoxy resins, for the preparation of phenoxy resins and for the preparation of epoxy resins.
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Carr David A.
Hefner, Jr. Robert E.
Villarreal Maria I.
Lone Werren B.
The Dow Chemical Company
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