Polyurethane polyurea anti-rust coating

摘要

Set of components for producing a polyurethane-polyurea coating agent comprising a binder having less solvent and low-viscosity, and an inorganic filler having high volume, comprises (A) a liquid reaction component comprising polyhydroxy compound, polyurethane binder, and inorganic filler, (B) a liquid reaction component comprising polyisocyanate for crosslinking the polyhydroxy compound and for forming polyurea binder, (C) a liquid anti-crater and anti-blister additive comprising titanium compounds (III), and (D) a volatile compound comprising ester compounds (IV). Set of components for producing a polyurethane-polyurea coating agent comprising a binder having less solvent and low-viscosity, and an inorganic filler having high volume, comprises (A) a liquid reaction component comprising polyhydroxy compound, polyurethane binder, and inorganic filler, (B) a liquid reaction component comprising polyisocyanate for crosslinking the polyhydroxy compound and for forming polyurea binder, (C) a liquid anti-crater and anti-blister additive comprising titanium compounds of formula (Ti(OR3) w(OCOR4) y) (III), and (D) a volatile compound comprising ester compounds of formula (R5-O-CH(R6)-(CH 2) 2-O-C(=O)-R7) (IV). R3 : 1-8C group; R4 : 10-18C hydrocarbyl; either w : 1 or 2; and y : 2 or 3; or w+y : 4; and R5-R7 : CH 3 or ethyl. Independent claims are also included for: (1) preparing the polyurethane-polyurea coating agent, comprising (i) providing the component (A) by dissolving 70 pts. wt. bisphenol A propylene oxide diol having a hydroxy number of 285, in 25 pts. wt. solvent, and adding the obtained solution, which comprises free hydroxy groups, with 1 pts. wt. antifoaming agent and 0.3 pts. wt. antioxidant, and suspending 85 pts. wt. finely ground and lamellar zinc paste and 41 pts. wt. finely ground and lamellar aluminum paste under stirring, (ii) providing the component (B) by mixing 80 pts. wt. polymeric diphenylmethane diisocyanate compounds of formula (IIa) having a content of reactive isocyanate groups of 31 wt.% and a Z-value of 0.7, with 20 pts. wt. solvent, and (iii) providing the component (C) by stirring 1 mole isopropyl titanate with 3 moles isostearic acid for several days at 50-70[deg] C under nitrogen atmosphere until the liberated isopropyl alcohol is stripped, and by mixing 1 part by volume titanium-IV compound with 99 parts by volume limonene, where for using 20 pts. wt. component (A), the component (A) is thoroughly mixed with 1 pts. wt. component (C) immediately before use, to obtain a premix, and component (B) is added to the premix under stirring, in such a proportion that the ready-to-use coating agent comprises 1.7 moles isocyanate groups per mole free hydroxyl group; and (2) use of the ready-to-use coating agent as corrosion inhibitor for a steel plate or a steel component, which is applied by roller or squeegee spiral. z : 0-3. [Image].