MANUFACTURING PROCESS OF VAPOR-PERMEABLE WATERPROOF POLYURETHANE ADHESIVE FOR TEXTILE COATING AND COATING FABRIC USED IT

摘要

The present invention relates to a method of manufacturing a moisture-permeable waterproof polyurethane adhesive for textile coating and a coating fabric using the same, (a) 6 to 19% by weight of a polyester polyol in the range of 1,000 to 3,000, (b) a number average molecular weight of 2,000 A first step of mixing 15% by weight of a solvent with respect to 20 to 33% by weight of a hydrophilic polyether polyol in the range of 4,000, (c) 0.1 to 4% by weight of a chain extender having a molecular weight of 90 to 900; (d) a second step of performing a first reaction by adding 1 to 2.5% by weight of toluene diisocyanate (TDI) type aromatic diisocyanate and a catalyst; (e) a third step of preparing a solvent-type polyurethane resin by performing a secondary reaction by dividing 1 to 3% by weight of methylene diisocyanate (MDI)-type diisocyanate together with 38 to 43% by weight of a solvent; Based on 100 parts by weight of the solvent-type polyurethane resin (f) 1 to 5 parts by weight of a melamine-based curing agent, (g) 3 to 10 parts by weight of an aliphatic isocyanate curing agent, (h) 3 to 10 parts by weight of an epoxy resin, (i) It is characterized in that it consists of a fourth step of blending 0.5 to 2 parts by weight of a melamine curing accelerator, and 20 to 50 parts by weight of a solvent for improving flowability during coating. The moisture-permeable waterproof polyurethane adhesive for textile coating obtained by the manufacturing method of the present invention has a relatively flexible touch through the step-by-step application of MDI/TDI and a mixture of melamine, aliphatic curing agent, and epoxy resin, while the adhesion and curing of epoxy and urethane resins Due to its characteristics, it is possible to maintain flexibility and moisture permeability while having excellent adhesion and washing durability with a peel strength of 4N/5cm or higher, a water pressure of 5,000㎜H 2 O or higher after 10 washing times, and a moisture permeability of 7,000g/㎡·day or higher for the non-fluorine-based water-repellent coating layer. There is an effect.