Patent GB-909214-A (GB)
Title: Lacquer mixtures with thixotropic properties
IPC: C08G18/71
Filed: 1960-03-14
Abstract: A lacquer mixture with thixotropic properties comprises a lacquer base and 0,1 to 30% by weight based on the total solids contents of a reaction product of a mono- and/or polycarboxylic acid and a mono- and/or symmetrical polyisocyanate, at least one of the reaction components containing a hydrocarbon chain with at least 10 carbon atoms.  Specified carboxylic acids are stearic, palmitic, oleic, ricinoleic, sorbic, methyl adipic, ethyl adipic, azelaic, sebacic, isosebacic and dimerized and trimerized unsaturated fatty acids, fatty acids of linseed oil, ricinene oil, soya oil and coconut oil and polyesters and polyesteramides containing free carboxyl groups of which many are specified. Specified isocyanates are cyclohexyl, phenyl, 3-carbomethoxyphenyl, 3:5-carbomethoxyphenyl, dodecyl and octadecyl isocyanate, tetramethylene-1:4-, hexamethylene-1:6-, o -o 1-dipropyl ether, thiodipropyl, cyclohexyl-1:4-, dicyclohexyl methane-4:41, toluylene-2:6- and diphenyl dimethylmethane-4:41-diisocyanate, 1:5-dimethyl-(2:4-o -diisocyanato methyl) benzene, 1:5-dimethyl(2:4-o -diisocyanatoethyl) benzene, 1:3:5-trimethyl-(2:4-o -diisocyanatomethyl) benzene, 4:o -propyl isocyanato phenyl isocyanate, 4-(g -isocyanato propoxy) phenyl isocyanate, 4-o -methylisocyanatophenyl isocyanate and addition products of polyhydric alcohols with symmetrical polyisocyanates. Specified lacquer bases are linseed oil, trans-esterified linseed oil, stand oil, urethane oil, alkyd resins and other natural or synthetic resins conventionally admixed with a lacquer solvent, e.g. esters, alkyl benzenes or high boiling hydrocarbons.  The reaction between the isocyanate and the acid may be effected in an inert solvent, e.g. benzene, toluene, xylene or a higher alkyl benzene. Many examples are given.  Reference has been directed by the Comptroller to Specification 840,830.ALSO:A lacquer mixture with thixotropic properties comprises a lacquer base and 0,1 to 30% by weight based on the total solids content of a reaction product of a mono- and/or polycarboxylic acid and a mono- and/or symmetrical polyisocyanate, at least one of the reaction components containing a hydrocarbon chain with at least 10 carbon atoms.  Specified carboxylic acids are stearic, palmitic, oleic, sorbic, ricinoleic, methyl adipic, ethyl adipic, azelaic, sebacic, isosebacic and dimerized and trimerized unsaturated fatty acids, fatty acids of linseed oil, ricinene oil, soya oil and coconut oil and polyesters and polyesteramides containing free carboxyl groups of which many are specified. Specified isocyanates are cyclohexyl, phenyl, 3-carbomethoxyphenyl, 3:5-carbomethoxyphenyl, dodecyl and octadecyl isocyanate, tetramethylene-1:4-, hexamethylene-1:6-, o -o 1-dipropyl ether, thiodipropyl, cyclohexyl-1:4-, dicyclohexylmethane-4:41-, toluylene-2:6- and diphenyl dimethylmethane-4:41-diisocyanate, 1:5-dimethyl-(2:4:o -diisocyanateomethyl) benzene, 1:5-dimethyl(2:4-o -diisocyanatoethyl) benzene, 1:3:5-trimethyl-(2:4-o -diisocyanatomethyl) benzene, 4:o -propylisocyanatophenyl isocyanate, 4-(g -isocyanatopropoxy) phenyl isocyanate, 4-o -methylisocyanatophenyl isocyanate and addition products of polyhydric alcohols with symmetrical polyisocyanates.  Specified lacquer bases are linseed oil, transesterified linseed oil, stand oil, urethane oil, alkyd resins and other natural or synthetic resins conventionally admixed with a lacquer solvent, e.g. esters, alkyl benzenes or high boiling hydrocarbons.  The reaction between the isocyanate and the acid may be effected in an inert solvent, e.g. benzene, toluene, xylene or a higher alkyl benzene.  Many examples are given.  Reference has been directed by the Comptroller to Specification 840,830.