摘要
Abstract
The waterborne polyurethane emulsion modified with hydroxypropyl polysiloxane (HP- PDMS) was prepared with isophorone di socyanate (IPDI) and polyether (N210) as raw materials, and HP- PDMS in⁃stead of part of N210, and the modified polyurethane was applied to coat the polyester fabric. The effect of the dosage of HP- PDMS on the properties of emulsion and its film was investigated, and the application prop⁃erties of the coated fabrics were tested. The results showed that as the dosage of HP- PDMS increased, the particle size of the emulsion increased, the stability of the emulsion decreased, the water contact angle of the film increased, water absorption rate of the film decreased; when the dosage of HP- PDMS was 6%, the sta⁃bility of the emulsion was good, the water contact angle of the film was 106.2° and the water absorption of the film was 32.49%. Compared with the unmodified waterborne polyurethane coated polyester fabric, the soft⁃ness and the hydrostatic pressure of the fabric coated with modified waterborne polyurethane were improved. Compared with fabric coated with polyether- polysiloxane modified waterborne polyurethane, the hydrostatic pressure and the water contact angle of the fabric coated with waterborne polyurethane emulsion modified with hydroxypropyl polysiloxane was improved, especial y water contact angle increased significantly, could reached 136.1°.关键词
水性聚氨酯/羟丙基封端聚硅氧烷/改性/涂层Key words
waterborne polyurethane/hydroxypropyl polysiloxane/modification/coating分类
化学化工
