MOISTURE CURING PRIMER AND METHOD FOR WATERPROOF AND ANTICORROSION OF CONCRETE STRUCTURES USING THE SAME AND POLYUREA

摘要

PURPOSE: A moisture-curable primer composition is provided to improve surface strength by a reaction with moisture remaining on the surface of concrete and to prevent the excitation and non-hardening phenomenon of a primer layer and a waterproof layer by increasing adhesion to a polyurea coating. CONSTITUTION: A moisture-curable primer composition includes 800-1200 parts by weight of a low viscosity diluent, 1.8-3.1 parts by weight of a 4-torluene sulfonyl-isocyanate, 1.3-2.2 parts by weight of a coupling agent, 0.3-1.1 parts by weight of a foaming agent, 0.3-1.1 parts by weight of a UV stabilizer, and 1.1-1.5 parts by weight of a storage stabilizer per 100.0 parts by weight of a primer resin intermediate. The primer resin intermediate is synthesized by addition-polymerizing a polyester resin, a polyether resin, a chain-extending resin, a high-boiling-point viscosity reducer, an aromatic isocyanate resin, an aliphatic or alicyclic isocyanate resin, and a thermal stabilizer. [Reference numerals] (AA) Primer coating layer; (BB) Anhydrous moisture absorbent; (CC) Water absorbed by a primer resin; (DD) Concrete ground; (EE) Moisture removing effect; (F1,F2,F3,F4,F5,F6,F7,F8) Moisture; (F9,H2) Anhydrous moisture-reacting absorbent; (GG) Water absorption by waterproof moisture-reacting absorbent; (H1) Water molecule; (II) Anhydrous moisture-reacting absorbent's urea crystallization caused by moisture; (JJ) Urea crystal; (KK) Urea crystal formation in a primer resin caused by moisture; (LL) Silane coupling agent supporting the bond between a polymer chain and the urea crystal