| 摘要 |
Sections of sheet vinyl flooring having polyurethane wear layers are joined together with a sealing composition comprising between about 10 and about 75 wt. % uncured polyurethane, between about 20 and about 85 wt. % tetrahydrofuran and between about 5 and about 60 wt. % of an organic solvent for the polyurethane. The uncured polyurethane is preferably in the form of polyurethane prepolymer of the moisture/cure type and the organic solvent for the polyurethane preferably has an evaporation rate not more than 95 percent of the evaporation rate of the tetrahydrofuran. |
