Being the weed growth suppression construction method which suppresses the growth of the weed which forms the weed growth suppression construction method which

摘要

PROBLEM TO BE SOLVED: To provide a weed growth restraining method and a weed growth restraining composition by which a coating film hardly affected by the water of an underlayer can be formed.;SOLUTION: The weed growth restraining method is to restrain growth of weeds in the underlayer by forming a coating film containing a polyurethane resin on the underlayer. The polyurethane resin is prepared by polymerizing a monomer containing a polyisocyanate and a polyol. The polyisocyanate is at least one kind selected from a group of chemical compounds of (A1) an MDI, (A2) a polymeric MDI, (A3) a carbodiimide modified MDI, (A4) a hydrogated MDI, and (A5) a dihydric or multiple alcohol prepared by modifying one of the (A1) to (A4). The polyol is at least one kind selected from a group of (B1) a ricinus, (B2) a modified ricinus, (B3) a polybutadiene-based polyol, and (B4) a polytetramethylene glycol.;COPYRIGHT: (C)2009,JPO&INPIT