TiO2-PU composite film for hygienic solvent-free leather and preparation method of TiO2-PU composite film

• Main Authors: GAO ERXIAN, WANG WEN, WANG YUANSHUAI, JIA SHENGCHAO, WANG YUANYOU, MEN YULONG
• Format: Patent
• Language: Chinese; English
• Published: 31.07.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention relates to a TiO2-PU compound film for hygienic solvent-free leather and a preparation method thereof. The method includes the steps: firstly, glucose is prepared into a carbon-based template, titanic acid is added under the ultraviolet condition, a tetrabutyl titanate/carbon-based compound is prepared, and pure TiO2 is obtained after the tetrabutyl titanate/carbon-based compound iscalcined; a polyester polyol and an isocyanate are reacted to prepare a polyurethane prepolymer with NCO as a terminal group, TiO2 and polyethylene glycol are mixed and then reacted with the polyurethane prepolymer, and finally the TiO2-PU compound film is prepared. The TiO2-PU compound film prepared by the scheme has good waterproof and moisture-permeable properties, and the defect that a traditional solvent-free polyurethane film is poor in sanitation is avoided; good mechanical, mechanical and hydrolysis-resistant properties can be maintained while the sanitation is maintained; the method can be directly used for p