发明名称 |
Preparation of 4,4'-dihydroxy-alpha'-dialkylstilbenes and 4, 4'-dihydroxy-alpha'-dialkylstilbenes |
摘要 |
4,4'-Dihydroxy-alpha-alkylstilbenes of high purity are prepared by reacting at a temperature of from about -20 DEG C. to about 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 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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申请公布号 |
US5475155(A) |
申请公布日期 |
1995.12.12 |
申请号 |
US19950374282 |
申请日期 |
1995.01.18 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
HEFNER, JR., ROBERT E.;VILLARREAL, MARIA I.;CARR, DAVID A. |
分类号 |
C07C37/20;C07C39/215;(IPC1-7):C07C37/20 |
主分类号 |
C07C37/20 |
代理机构 |
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代理人 |
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地址 |
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