蓖麻油/硅烷双重改性水性聚氨酯黏合剂

Waterborne polyurethane adhesive modified by castor oil and silane

以聚醚二元醇(N220和N240)和异佛尔酮二异氰酸酯(IPDI)为主要原料,二羟甲基丙酸(DMPA)为亲水扩链剂,三羟甲基丙烷(TMP)、蓖麻油(CO)和有机硅烷(KH-550)为交联剂,合成了CO/KH-550双重改性WPU(水性聚氨酯)黏合剂。探讨了m(N220)∶m(N240)比例、CO和KH-550用量对WPU黏合剂及其涂料印花织物性能的影响。结果表明:当R=n(-NCO)/n(-OH)=1.4、w(CO)=5%、m(N220)∶m(N240)=2∶1和w(KH-550)=4%时,CO/KH-550双重改性WPU黏合剂的耐水性较好,其涂料印花织物的摩擦牢度及皂洗牢度均明显高于未改性WPU,并且织物手感较柔软。

With polyether diol（N220 and N240） and isophorone diisocyanate（IPDI） as main raw materials,dimethylolpropionic acid（DMPA） as hydrophilic chain extender,trihydroxylmethylpropane（TMP）,castor oil（CO） and organic silane（KH-550） as cross linkers,a waterborne polyurethane（WPU） adhesive modified by CO/KH-550 was synthesized.The influences of some factors such as the mass ratio of m（N220）∶m（N240）,CO and KH-550 contents on the properties of WPU adhesive and its pigment printing fabric were discussed.The results showed that the WPU adhesive modified by CO/KH-550 had better water resistance,the rubbing fastness and soaping fastness of fabric with CO/KH-550 modified WPU as adhesive of pigment printing were obviously higher than those with unmodified WPU as adhesive of pigment printing,and the former fabric was more soft when R value（namely molar ratio of-NCO to-OH） was 1.4,the mass fractions of CO and KH-550 were 5% and 4% respectively,the mass ratio of m（N220）∶m（N240） was 2∶1.