POLYURETHANE RESIN COMPOSITIONS FOR A NON-SWELLING PERMEABLE WATERPROOF CLOTH USED SURFACE ACTIVATED NANO-SILICA PARTICLES

摘要

The present invention relates to a polyurethane resin composition for a non-swellable moisture-permeable and waterproofing fabric using surface-treated nanosilica particles, and more particularly, to a polyurethane resin composition for surface-treated nanosilica particles having a surface of a nanosilica having a particle size of 10 to 1,000 nm on the basis of 100 parts by weight of a hydrophobic polyurethane resin. 10 to 15 parts by weight of silicate coupled with polyethylene glycol macromer is uniformly mixed.The polyurethane resin composition for a non-swellable moisture-permeable and waterproofing sheet using the surface-treated nanosilica particles of the present invention is characterized in that a silane compound and a polyethylene glycol macromer are added to the surface of the nanosilica particles added to the hydrophobic polyurethane resin, Containing silicate is excellent in compatibility with the polyurethane resin and the solvent and is excellent in the moisture permeability without causing swelling due to moisture permeation.Further, the moisture-permeable and water repellent foam formed by the polyurethane resin composition of the present invention in the form of a film having a thickness of about 10 to 30 mu m has a remarkably reduced swelling phenomenon in the appearance of moisture permeability and has a good aesthetic appearance and a high density of the material, Since it is hydrophobic, it is excellent in hydrolysis resistance against humidity and has good durability.