Phosphorus-containing water-based polyurethane resin and preparation method thereof

• Main Authors: ZHOU YINGPING, MU BO, ZHAO QIUPING, LI MINRUI, YANG BAOPING, WANG XINYUAN, GUO JUNHONG, GUO YONGLIANG, CUI JINFENG, BAO XUEMEI, XIE JIREN, ZHANG PENGZHONG
• Format: Patent
• Language: English
• Published: 25.03.2015
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a phosphorus-containing water-based polyurethane resin and a preparation method thereof. The phosphorus-containing water-based polyurethane resin comprises the following components in percentage by weight: 12%-18% of phosphorus-containing polyester polyol, 8%-12% of TDI, 0.24%-0.36% of dibutyltin dilaurate, 1.68%-2.52% of 2,2-dimethylolbutyric acid, 1.68%-2.52% of triethylamine and 70% of deionized water. The preparation method comprises the following preparation steps of transferring the phosphorus-containing polyester polyol at formula ratio into a container provided with a stirrer, a condenser and a thermometer, heating to increase temperature to 45 DEG C, slowly dripping the TDI at the formula ratio, stirring for 30 minutes, then increasing the temperature to 65 DEG C, and dripping dibutyltin dilaurate at the formula ratio to react for 2 hours; increasing the temperature to 70 DEG C, and adding 2,2-dimethylolbutyric acid at the formula ratio to carry out hydrophilic chain-extension reaction for 2 hours till the content of isocyanate group is stable and invariant within 30 minutes; reducing the temperature to 35 DEG C, adding triethylamine at the formula ratio and the deionized water at the formula ratio, and stirring at high speed for emulsification to obtain the water-based polyurethane resin with solid content of about 30%.