FORMULATION FOR PROTECTING POLYMER COMPOSITES Russian patent published in 2003 - IPC

FIELD: polymer materials. SUBSTANCE: invention relates to polymer formulations based on modified polyurethanes that can be used in aircraft industry for protecting blades of helical-blower engines and other assemblies made from polymer composites and exposed during operation to gas-abrasive and gas-drop erosion under action of reversal dynamic loadings and atmospheric effects. Formulation is composed of, wt parts: hydroxyl- and carboxyl-containing ester, 50-80; polyester-adipate, 20-30; aliphatic isocyanate, 35-45; threadlike ZnO crystals with tetrahedral structure and ratio of the crystal length to its diameter (20-30):1, 1-4.9; organic solvent, 10-40; and, additionally, pigment 10-15 and tertiary amine as catalyst 1.0-1.4. EFFECT: increased atmosphere and erosion resistance, improved mechanical properties, enhanced adhesion strength to substrate at thickness of coating 250 mcm. 2 tbl