发明名称 |
PREPARATION OF 4,4'-DIHYDROXY-ALPHA-ALKYLSTILBENES AND 4,4'-DIHYDROXY-ALPHA, ALPHA'-DIALKYLSTILBENES |
摘要 |
4,4'-Dihydroxy-alpha-alkylstilbenes of high purity were prepared by reacting at a temperature of from -20 DEG C to 20 DEG 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 0.1:1:0.0026 to 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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申请公布号 |
WO9515301(A1) |
申请公布日期 |
1995.06.08 |
申请号 |
WO1994US13480 |
申请日期 |
1994.11.21 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
HEFNER, ROBERT, E., JR.;VILLARREAL, MARIA, I.;CARR, DAVID, A. |
分类号 |
C07C37/20;C07C39/215;(IPC1-7):C07C37/20 |
主分类号 |
C07C37/20 |
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