| 摘要 |
High molecular weight epoxy-containing acetone-soluble products are made by heating at a temperature of 50 DEG C. to 300 DEG C. a solution comprising a glycidyl polyether of a dihydric phenol having an epoxy equivalency greater than 1,0 with not more than 5% by weight of the polyether of a Friedel-Crafts catalyst or a complex thereof until the viscosity of the mixture has increased at least 3 times but not sufficiently to cause gelation and then stopping the reaction. Specified dihydric phenols are hydroquinone, resorcinol, catechol, methyl resorcinol, 2, 2-bis (4-hydroxy phenyl) propane, 2, 2-bis(4-hydroxy phenyl) butane, 2, 2-bis(4-hydroxy-phenyl) pentane and 1, 5-dihydroxy naphthalene. Specified Friedel-Crafts catalysts are aluminium chloride, ferric chloride, aluminium bromide, zinc chloride, stannic chloride, p titanium tetrachloride and complexes of boron trifluoride with amines, phenols, ethers, glycols and monohydric alcohols of which many are specified. Specified diluents for the reaction mixture are xylene, toluene and cyclohexane. Polyhydric materials e.g. glycerol, 1. 2, 6-hexanetriol, polyvinyl, pentaeruthritol, polyallyl alcohol, copolymers of allyl alcohol with styrene, ethylene glycol, triethylene glycol and hexamethylene glycol may be present in the reacton mixture. The products of the invention may be combined with copolymers of vinyl acetate with vinyl chloride or cured by conventional epoxide curing agents of which many are specified. The Specification describes the preparation of glycidyl polyethers from epichlorohydrin and 2, 2-bis (4-hydroxy phenyl) propane, the examples describing the reaction of said polyethers with a boron-trifluoride-ethylamine complex. The products of the invention are soluble in ketones, esters, alcohols, hydrocarbons and chlorinated hydrocarbons. The cured products of the invention may be used in combination with pigments, dyes, stabilizers, plasticizers, oils, resins, and tar for coatings, mouldings, laminating and reinforcing, e.g. glass fabric. Specifications 730,670, 774,663 and U.S.A. Specifications 2,640,037 and 2,651,589 are referred to.
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