| 摘要 |
1387668 Polyglycidyl ethers CIBA-GEIGY AG 24 March 1972 [26 March 1971] 14042/72 Heading C2C [Also in Division C3] Polyglycidyl ethers (I) are made by reaction of (I<SP>1</SP>) with epihalohydrin, hydrogen halide being eliminated, where m is 0, 1, or 2; n is 1, 2, or 3; X is C #12 alkyl, Cl, or Br; R is an alkylene or alkenylene group of M.W. # 2000, which group can be interrupted by benzene nuclei or O atoms, and can carry halogen- or O-containing substitutents; and R<SP>1</SP> is either R or a group convertible to R by reaction with epichlorohydrin and elimination of hydrogen halide. The reaction may be performed in the presence of an alkali metal hydroxide with or without a catalyst, e.g. (CH 3 ) 4 NCl, (C 2 H 5 ) 4 NCl, or Water can be removed from the reaction mixture by azeotropic distillation. 2-5 moles epichlorohydrin may be used per OH gp. of (I<SP>1</SP>). Methylolphenols (I<SP>1</SP>) can be obtained by reacting a phenol with 1-3 moles HCHO, in alkaline medium, the resultant Na hydroxymethylphenolates being reacted with a dihalogen compound having radical R, e.g. 1,2-dibromoethane, 1,6 - dichlorohexane, 1,4 - dichlorobut - 2 - ene, α,α<SP>1</SP> - 2,3,5,6 - hexachloro - (p - or m-)xylene- 2,2<SP>1</SP> - dichlorodiethylether, ethyleneglycol - di- 21 - chloroethylether, α,# - (Cl - or Br - )- terminated polyethylene or propylene oxides, glycerol-1,3-dichlorohydrin or epichlorohydrin. Suitable phenols are: phenol, m-cresol, p-tbutylphenol, nonylphenol, dodecylphenol, 2- chlorophenol, or 2,4-dibromophenol. Examples of (I) are Uses.-Lacquers, casting, dipping, impregnating, whirl-sinter powders, moulding, injectionmoulding, bonding, adhesives, laminating, sealing, fillers and tool resins, when treated with conventional curing agents. |
