Study of the kinetic stability of pigmented polyurethane solutions
The effect of the nature of a pigment and the degree of its dispersity on the kinetics of particle sedimentation in pigmented polyurethane solutions is studied. The studies are performed using the sedimentation method. The effect of the adsorption modification of a pigment surface with surfactants on the stability of polyurethane solutions is also investigated, as well as the structure of coatings containing different pigments. It is established that, in coatings where carbon black with high surface activity is used, pigment particles are surrounded by adsorption layers with a larger packing density of structural elements relative to the polymer bulk. It is shown that the structure of coatings depends to a considerable extent on the procedure of component compatibility during the preparation of pigment paste.
KeywordsSurfactant Polyurethane Carbon Black Polymer Science Series Polymer Bulk
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