Modified proteins from Lupinus albus as a possible cobinder in coating colours

The aim of this investigation was to investigate the suitability of protein s from Lupinus Albus as a cobinder for coating colours. For this purpose di sulfide groups and amino groups were modified with a cationic acrylate and partial hydrolysis were carried out. The parameters studied were solubility , viscosity, charge and molecular weight. It. is shown that the derivation of the disulfide groups had the greatest effect on the protein structure wh ereas the derivation of the amino groups show only a slight effect. All coa ting colours prepared with the modified proteins showed low viscosity and t hixotropy. The coating viscosity depends on the type of the protein modific ation. The water retention value of all coating colours was very low.