ACICULAR CRYSTALS OF HYDRAZINE-BASED DIUREA DERIVATIVES AND THEIR USE AS RHEOLOGY MODIFIERS IN COATING AND ADHESIVE COMPOSITIONS

摘要

The invention pertains to acicular hydrazine-based diurea derivative crystals of the formula R'HN-CO-NH-NH-CO-NHR wherein R and R' independently are unsubstitued or substituted hydrocarbyl groups with an average length of the crystals ranging from 0.1 - 300 micrometers. Preferably, the hydrocarbyl group is a hexyl, octadecyl, benzyl, or cyclohexyl group. The invention further relates to the use of such crystals as a rheology modifier in coatings and adhesives.