Long-lasting water-repellent textile treatment process using UV-curable polydimethylsiloxane-containing polyurethane system

摘要

A long-lasting water-repellent textile treatment process using a curable polydimethylsiloxane (PDMS)-containing polyurethane (PU) system includes the steps of mixing a di-isocyanate with a PDMS-containing material, and reacting the di-isocyanate with the PDMS-containing material to form an NCO-terminated PDMS-containing PU system. The treatment process obtains a long-lasting water-repellent textile, which overcomes the shortcomings in hand feel, washing durability, and breathability of the conventional water-repellent textile, while having the advantages of low cost and of being an environmentally friendly process, while also providing useful and practical industrial applications.

主权项

1. A water-repellent textile treatment process using a curable polydimethylsiloxane (PDMS)-containing polyurethane (PU) system, comprising the steps of:
mixing a catalyst with a PDMS diol to form a PDMS-containing material; mixing a diisocyanate with the PDMS-containing material; reacting the diisocyanate with the PDMS-containing material to obtain a NCO-terminated PDMS-containing PU; adding a hydroxyl-containing acrylate to react with the NCO-terminated PDMS-containing PU to obtain a UV curable PDMS-containing PU; mixing the UV-curable PDMS-containing PU with reactive diluents and photoinitiator uniformly; coating a mixture of the UV-curable PDMS-containing PU, the reactive diluents and the photoinitiator onto a textile surface; and irradiating the coated textile with a UV light until the mixture of the UV-curable PDMS-containing PU is dried to obtain the long-lasting water-repellent textile, wherein the catalyst is dibutyltin dilaurate; and wherein the NCO-terminated PDMS-containing PU consists of a PU main chain and a PU side chain.