methods to reduce the äthylenbindungen of polyunsaturated aliphatic or cycloaliphatic carboxylic acids doubly unsaturated at elevated temperature in the presence of iodine as disproportionierungskatal

摘要

1398926 Treating rosin acids REICHHOLD CHEMICALS Inc 27 June 1972 [23 July 1971] 30081/72 Heading C4D The ethylenic unsaturation of rosin acids is decreased without decarboxylating or otherwise degrading the rosin acids by dispersing into a mixture of rosin acids an iodine disproportionation catalyst and an activator comprising a metal salt of an organic carboxylic acid which is soluble in the mixture of rosin acids, and which is non-poisonous to the iodine catalyst, the metal being iron, copper, tin, zinc, aluminium, lead or magnanese, and heating the mixture to a temperature of 175‹C. to 300‹ C. for from 3 to 180 minutes. In the examples tall oil resin, Telogia Wood rosin, Portuguese gum and Mexican gum are heated with iodine in the presence of iron, aluminium, zinc, tin, copper and manganese resinates, iron fumarate, lead tallate, tin oleate, iron stearate and iron oleate.