Alkyd Resins

摘要

1,166,981. Alkyd resins. CHEMISCHE INDUSTRIE SYNRES N.V. 8 March, 1968 [9 March, 1967], No. 11497/68. Headings C3P and C3R. [Also in Division C7] Alkyd resins are prepared by (a) partially esterifying the reaction product of a natural or synthetic drying or semi-drying oil and anα,#- ethylenically unsaturated dicarboxylic acid with a monocyhydric cyclic alcohol, (b) esterifying the product with an excess of polyhydric alcohol to give a hydroxyl containing product and (c) esterifying the product of (b) with a polybasic acid anhydride. In step (a) the partial esterification with monohydric cyclic alcohol may be done to give a product with n mols. of anhydride groups/mole of oil and (b) with n mols. of polyhydric cyclic (n=1, 2, 3) alcohol. The step (b) may be conducted using a partial ester of a polyhydric cyclic alcohol and the polybasic acid anhydride. The oil may be the reaction product of a drying oil fatty acid and a polyol and may be modified before, during or after reaction with theα#-unsaturated acid by copolymerization with an unsaturated monomer. The monohydric cyclic alcohol may be carbo or hetero-cyclic and may be the partial ester of a polyhydric cyclic alcohol and a fatty acid. The polyhydric alcohol may be the partial ester (containing 2 hydroxyl groups) of a polyhydric cyclic alcohol and a fatty acid. The product of the invention may be further esterified with monohydric alcohols or monoepoxides and may be rendered water-soluble by treatment with NH 3 or an amine. The examples use adducts of linseed oil with maleic acid, soyabean oil with maleic acid, linseed oil and castor oil copolymerized with styrene and maleic acid and pentaerythritol with linseed oil fatty acid and maleic acid; tricyclodecane monomethanol, methyl cyclohexanol, cyclohexanol, t.-butyl cyclohexanol, benzyl alcohol; tricyclodecane dimethanol halogenated bisphenol-A, cyclohexane - 1,2 - diol, p - xylene-α,α1-diol, 1,4- cyclohexane dimethanol; phthalic anhydride, maleic anhydride, succinic anhydride, trimellitic anhydride, respectively in the steps (a), (b) and (c). In Example 15 linseed oil, dehydrated castor oil and styrene are copolymerized and then treated with maleic anhydride and esterified. In an example an eleotrolytically depositable paint is made by adding iron oxide to an aqueous solution of a neutralized resin.