棉织物用抗皱整理剂水性聚氨酯的制备及应用

Preparation of waterborne polyurethane and its application to anti-wrinkle finishing of cotton fabric

采用异氟尔酮二异氤酸酯(IPDI)、聚丙二醇2000(PPG)、二轻甲基丙酸(DMPA)、中和剂(TEA)、硅烷偶联剂(APTS)等为原料,成功制备了硅烷偶联剂封端改性水性聚氨酯(WPU)。以WPU乳液性能和WPU抗皱整理棉织物的性能为指标,对制备工艺中单体预聚时间、改性剂用量、反应中和度、亲水扩链剂用量及R值进行了优化。结果表明,单体预聚时间3h、硅烷偶联剂用量为计算理论值、中和度110%、DMPA质量分数5.6%、R值1.6时,傅里叶红外光谱(FT-IR)显示棉织物WPU改性成功。与整理前的织物相比,WPU抗皱整理棉织物的结晶形态无较大改变,虽白度和弹性有下降,但织物光滑性和柔软性有较大提高,折皱回复角提升65.6%,强力保留率达86.2%。WPU抗皱整理织物的强力保留率具有显著优势。

Waterbor ne polyuretha ne modified by silane coupli ng age nt (WPU) is successfully prepared with isofluoronediisocyanate (IPDI), polypropylene glycol 2000 (PPG), dimethylol propionic acid (DMPA), n eutralizer (TEA) and silane coupli ng age nt (APTS). Based on the properties of WPU emulsio n and the properties of WPU modified cotton fabric, the monomer prepolymerization time, dosage of modifier, neutralization degree of reaction, amount of hydrophilic chain extender and R value are optimized during the preparation process of WPU. When the prepolymerization time is 3 h, the amount of silane coupling agent is 100%, the neutralization degree is 110%, the amount of DMPA is 5.6%, and the R value is 1.6, the result of Fourier Tran storm Infrared Spectroscopy (FT-IR) shows that the modification of the cotton fabric by WPU has been succeeded. Moreover, fabric performance in crystallinity shows little difference between cotton fabrics before and after WPU modification. Although the whiteness and elasticity of the fabric decrease, the smoothness and softness of the fabric increases greatly. The wrinkle recovery ari-gle increases by 65.6% and strength retention rate is 86.2%. This anti-wrinkled cotton fabric has a signifi-cant advantage in strength retention rate. Key words: