摘要
用马来酸酐改性蓖麻油（MCO）合成了一系列不同组成的耐光性聚氨酯复鞣剂水乳液（MC-PUR）,研究了复鞣剂中-COOH质量分数、n（NCO）/n（OH）、m（MCO）/m（PEG1000）对乳液电导率、黏度、临界聚沉值（CC.C）、耐酸稳定性的影响.结果表明,随-COOH质量分数从3%增大到7%,电导率从1 556 μs/cm增大到3 435 μs/cm,黏度先从168 mPa · s增大到224 mPa · s,后又降低到85 mPa · s,当w（-COOH）=5%时,黏度达到最大值;随n（NCO）/n（OH）从0.5增大到0.9,电导率从2 943 μs/cm降到2 464 μs/cm,黏度从428 m Pa · s降到224 mPa · s;随m（MCO）： m（PEG1000）从1： 1增大到3： 0,黏度从224 mPa · s降到67 mPa · s;CC.C随-COOH质量分数增加和m（MCO）/m（PEG1000）增大而降低;耐酸稳定性结果证明,当w（-COOH）=3%～5%,m（MCO）： m（PEG1000）=1： 1,n（NCO）/n（OH）=0.5～0.9时,MC-PUR适用于皮革复鞣工序.
A series of sunproof waterborne polyurethane retanning agents （ MC - PUR ） with different compositions were synthesized with maleic anhydride modified castor oil （MCO）. Effects of carboxyl content and n （NCO）/n （ OH ）, m （ MCO ）/m （ PEG1000 ） ratios on its conductivity, viscosity, critical coagulation value （ Cc c ） and acid resistant stability were studied. As carboxyl content increases from 3% to 7% ,the conductivity increases from 1 556 μs/cm to 3 435 μs/cm, and the viscosity increases at first from 168 mPa·s to 224 mPa·s and then decreases to 85 mPa· s. As n （NCO）/n （ OH ） ratio increases from 0. 5 to 0. 9, the conductivity decreases from 2 943 μs/cm to 2 464 μs/cm and the viscosity decreases from 428 mPa·s to 224 mPa·s. As m （MCO）/m （PEG1000） ratio increases from 1 ： 1 to 3：0, the viscosity decreases from 224 mPa·s to 67 mPa·s. The Cc c decreases as carboxyl content and m（ MCO）/m（PEG1000） ratio increase. The acid resistant stability experiments showed that, when w（-COOH） =3%～5% ,m（MCO）：m（PEG1000） = 1：1 and n（NCO）/n（OH） -0.5～0. 9,the MC - PUR is suitable for leather retanning process.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2006年第6期582-587,共6页
Fine Chemicals
关键词
改性蓖麻油
电导率
黏度
临界聚沉值
耐酸稳定性
modified castor oil
conductivity
viscosity
critical coagulation value
acid resistant stability
