| 摘要 |
The invention comprises glycidyl ethers of polycarbonates of formula: <FORM:0942538/C2/1> <FORM:0942538/C2/2> where A is the substituted or unsubstituted residue of an aromatic nucleus, R is a bridging radical, t and u are integers, s is O or 1 and when s is 0 either t or u may be 0, and z is 1-1000. The glycidyl esters are made by reacting a dihydric phenol, epichlorhydrin and an esterforming derivative of carbonic acid (e.g. a diaryl carbonate, a dihalocarbonyl or a bi haloformate of hydroquinone or bisphenol-A). The epichlorhydrin may be present during the reaction of the other two reactants or it may be added afterwards. Examples describe the manufacture of the diglycidyl ether of bisphenol-A polycarbonate by reacting bisphenol-A, phosgene and epichlorhydrin in the presence of aqueous sodium hydroxide solution and methylene chloride. Specification 835,464 is referred to.ALSO:The invention comprises epoxidized polycarbonates having the formula: <FORM:0942538/C3/1> where A is the substituted or unsubstituted residue of an aromatic nucleus, R is a bridging radical, t and u are integers, s is 0 or 1 and when s=O either t or u may be O, and z is 1-1000. The products are made by reacting a dihydric phenol, epichlorhydrin and an ester-forming derivative of carbonic acid (e.g. a disocryl carbonate, a dihalocarbonyl or a bishaloformate of hydroquinone of bisphenol-A). The epichlorhydrin may be present during the reaction of the other two reactants or may be added afterwards. The products are soluble in tetrachloroethane, methylene chlorate and pyridene. They may be cured by epoxy curing agents. Fillers e.g. woodflour, silica, carbon black or divided metal may be added. Examples describe the manufacture of the diglycidyl ether of bisphenol A polycarbonate by reacting bisphenol-A, phosgene and epichlorhydrin in the presence of aqueous sodium hydroxide solution and methylene chloride and the subsequent curing of the product with phthalic anhydride. Uses: coating material, films, fibres, adhesives and moulding compositions. Specification 835,464 is referred to. |
