QUICK-SETTING TYPED POLYUREA-BASED COMPOSITION FOR COATING THE SURFACE OF STRUCTURES SUCH AS CONCRETE, STEEL AND TIMBER

摘要

PURPOSE: A quick-curable polyurea-based surface coating composition is provided to have excellent waterproofing performance, while recovering performance of concrete in which water resistance and durability are reduced. CONSTITUTION: A quick-curable polyurea-based surface coating composition comprises a base material and a curing agent with mixing ratio of 7:3(v/v). The base material comprises 55-70 parts by weight of methylene diphenyl diisocyanate, 20-30 parts by weight of polyoxypropylene glycol, and 10-15 parts by weight of propylene carbonate. The curing agent comprises 30-70 parts by weight of polyoxypropylenediamine, 10-20 parts by weight of polyethertriamine, 5-10 parts by weight of diethyltoluenediamine, 8-27 parts by weight of diethyltoluenediamine, 2-5 parts by weight of propylene glycol, 1-2 parts by weight of propyltrimethoxysilane, 2-3 parts by weight of pigment, and 2-3 parts by weight of UV absorbent.