Patent GB-406738-A (GB)
Title: Manufacture of products for use in the preparation of paints and varnishes
Filed: 1932-09-05
Abstract: Products useful as drying-oils for paints and varnishes are prepared by esterifying quebrachitol with the fatty acids of drying oils.  The process may be effected by heating quebrachitol with the fatty acids or with their glycerides or other esters or other derivatives in the presence or absence of an esterification catalyst and a solvent.  The esterification may be performed at atmospheric, reduced or raised pressure, but is preferably begun at atmospheric pressure and completed under reduced pressure.  The products may be thickened by the action of heat or by blowing with air.  In the examples, (1) quebrachitol and fatty acids from linseed oil are heated to 240--245 DEG  C. in carbon dioxide first at atmospheric pressure and later under reduced pressure; (2) quebrachitol and fatty acids from tung oil are heated to 235--240 DEG  C. in carbon dioxide in the presence or absence of a little magnesium oxide; (3) quebrachitol and fatty acids from soya bean oil are heated as in example 1; (4) quebrachitol and fatty acids from tung oil are heated to 150--170 DEG  C. in solvent naphtha; (5) the product of example 1 is heated at 285--290 DEG  C. in carbon dioxide, whereby a product resembling thick stand oil is obtained; (6) the product of example 1 is blown with air in the presence of a little cobalt resinate; (7) quebrachitol and linseed oil are heated in carbon dioxide to 240--250 DEG  C. under reduced pressure in the presence of a little caustic soda; a product resembling that of example 1 is obtained.ALSO:Products useful as drying-oils for paints and varnishes are prepared by esterifying quebrachitol with the fatty acids of drying oils.  The process may be effected by heating quebrachitol with the fatty acids or with their glycerides or other esters or other derivatives in the presence or absence of an esterification catalyst and a solvent.  The esterification may be performed at atmospheric, reduced or raised pressure, but is preferably begun at atmospheric pressure and completed under reduced pressure.  The products may be thickened by the action of heat or by blowing with air.  In the examples: (1) quebrachitol and fatty acids from linseed oil are heated to 240--245 DEG  C. in carbon dioxide first at atmospheric pressure and later under reduced pressure; (2) quebrachitol and fatty acids from tung oil are heated to 235--240 DEG  C. in carbon dioxide in the presence or absence of a little magnesium oxide; (3) quebrachitol and fatty acids from soya bean oil are heated as in example (1); (4) quebrachitol and fatty acids from tung oil are heated to 150--170 DEG C. in solvent naphtha; (5) the product of example 1 is heated at 285--290 DEG  C. in carbon dioxide, whereby a product resembling thick stand oil is obtained; (6) the product of example 1 is blown with air in the presence of a little cobalt resinate; (7) quebrachitol and linseed oil are heated in carbon dioxide to 240--250 DEG  C. under reduced pressure in the presence of a little caustic soda; a product resembling that of example 1 is obtained.  The Provisional Specification states that mixtures of drying oil acids with other monocarboxylic acids such as stearic acid or with resin acids may be used for the esterification, and includes an example in which quebrachitol, colophony and linseed oil acids are heated to 220--230 DEG  C. in carbon dioxide.