Patent GB-1030683-A (GB)
Title: Coating compositions
Inventor: FRY PHILIP JAMES
IPC: C09D191/00
Filed: 1962-03-29
Abstract: A coating composition comprises an aqueous solution of the reaction product of an unsaturated fatty acid having at least 12 carbon atoms in the chain, or an ester of such a fatty acid, with an acyclic, olefinic carboxylic acid or anhydride thereof, or an aqueous solution of the product obtained by reacting the above reaction product with formaldehyde, said solution containing a mixture of cobalt, lead and iron-drying agents in amounts of 0.01 to 0.1% cobalt, 0.05 to 5.0% lead and 0.005 to 0.1% iron, all percentages being by weight of the reaction product or the formaldehyde reacted reaction product.  The reaction product may be obtained by reacting tung, oiticica, linseed, soya, cotton seed, dehydrated castor, ferilla, tall or unsaturated fish oils, or the fatty acids obtained from such oils, or methyl or polyglycol esters of such acids, with maleic acid, fumaric acid, aconitic acid, itaconic acid or their anhydrides, or acrylic acid, citraconic anhydride or maleic acid partially esterified with an aliphatic alcohol.  The material may be reacted by heating at 110 DEG to 300 DEG  C. until a water soluble product is obtained.  Maleic anhydride may be reacted with linseed oil in an amount of 15 to 25% maleic anhydride based on the total weight of linseed oil and maleic anhydride. The product may then be reacted with up to 1/5 of its weight of formaldehyde, preferably in the presence of water.  The cobalt, lead and iron drying agents may be the naphthenates. The coating composition may contain 15 to 60 grams of resinous material per 100 millilitres of liquid.  The dried films may be cured by heating at 110 DEG  to 250 DEG  C.ALSO:A coating composition comprises an aqueous solution of the product obtained by reacting formaldehyde with the reaction product of an unsaturated fatty acid having at least 12 carbon atoms in the chain, or an ester of such a fatty acid, with an acyclic, olefinic carboxylic acid or anhydride thereof, said solution containing a mixture of cobalt, lead and iron drying agents in amounts of 0.01 to 0.1% cobalt, 0.05 to 5.0% lead and 0.005 to 0.1% iron, all percentages being by weight of the formaldehyde reacted reaction product.  The reaction product may be obtained by reacting tung, oiticica, linseed, soya, cotton seed, dehydrated castor, ferilla, tall or unsaturated fish oils, or the fatty acids obtained from such oils, or methyl or polyglycol esters of such acids, with maleic acid, fumaric acid, aconitic acid, itaconic acid or their anhydrides, or acrylic acid, citraconic anhydride or maleic acid partially esterified with an aliphatic alcohol.  The material may be reacted by heating at 110 DEG  to 300 DEG  C. until a water-soluble product is obtained.  Maleic anhydride may be reacted with linseed oil in an amount of 15 to 25% maleic anhydride based on the total weight of linseed oil and maleic anhydride. The product may then be reacted with up to 1/5 of its weight of formaldehyde, preferably in the presence of water.  The cobalt, lead and iron drying agents may be the naphthenates.  The coating composition may contain 15 to 60 grams of resinous material per 100 millilitres of liquid. The dried films may be cured by heating at 110 DEG  to 250 DEG  C.  Examples are given.