| 摘要 |
PURPOSE: Provided are repairing agents for a footing of a golf practice range, which have elongation and adhesive force similar to the material of the footing and excellent abrasion against golf shoes and a convenient repairing and working method. CONSTITUTION: The footing of the golf practice range is repaired by filling the broken parts(21) of a rubber mat(20) for hitting with a biliquid type polyurea cartridge(22), curing, and then spraying a biliquid type polyurea RIM(reactive injection molding)(23) onto the whole surface of the mat filled with the polyurea cartridge. The biliquid type polyurea cartridge(22) comprises a main resin and an MDI(methylene diisocyanate) hardener containing 12.5-13.5% of NCO in the weight ratio of 1:1, wherein the main resin comprises 65-75wt% of polyoxy propylene diamine, 8-12wt% of polyether triamine having a molecular weight of 5,000, 6-10wt% of polydiethyl toluene diamine, 7-9wt% of poly(bisphenyl diamine), and 0.1-2wt% of an adhesion improving agent(a silane coupling agent). And the biliquid type polyurea RIM(23) comprises a main resin and an MDI hardener containing 15-16% of NCO in the weight ratio of 1:1, wherein the main resin comprises 53-58wt% of the polyoxy propylene diamine, 8-10wt% of the polyether triamine having a molecular weight of 5,000, 5-8wt% of the polydiethyl toluene diamine, 22-28wt% of polydiphenyl triamine, 1-10wt% of a pigment, and 0.1-2wt% of the adhesion improving agent(the silane coupling agent).
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