水性聚氨酯的合成与应用.docx
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1、摘要活性染料是纤维素纤维染色的主要染料,但活性染料的湿摩牢度很低。虽然国际标准及国内标准都规定湿摩牢度2-3级即可达标,但近年来消费者对湿摩牢度的要求越来越苛刻,往往要求3级以上才能接受,而目前染色纺织品尤其是深浓色纺织品的湿摩擦牢度往往达不到要求。因此提高湿摩牢度已成为困扰印染界的一大难题。本课题合成出一种新型的以二异氟酸酯和低分子聚酸为原料的、本钱适中的、集吸附、沉淀、成膜、固色、交联五种机理于一身的水性聚氨酯型湿摩擦牢度提升剂湿摩提升剂CW),确定了其合成工艺:n(PPG)/n(PEG)=1:1,R值JNCo/-0H的物质的量比)二,二羟甲基丙酸(DMPA)用量为3.07%,扩链剂二乙烯
2、三胺和交联剂环氧氯丙烷与MDl的物质的量之比为1:1:1;预聚反响温度为70C,预聚反响时间为h;与二乙烯三胺的反响温度为50C,时间为2h;与环氧氯丙烷反响温度为50C,时间为30min通过实验摸索,确定了湿摩牢度提升剂CW的应用工艺:两浸两轧(湿摩提升剂CW30gl,整理液PH值为78,轧液率为液00%为0%)f烘干(I(XrC)焙烘(150pC120S)应用结果说明,织物经湿摩提升剂CW处理后,湿摩擦牢度明显提高,到达3级。本课题的创新点在于将在溶剂型聚氨酯合成中所用的原料MDI移植到水性聚氨酯的合成工艺中,为MDl在水性聚氨酯方面的应用开辟新路。关键词湿摩擦牢度提升剂;活性染料;二苯基
3、甲烷二异氟酸酯(MDI);合成;应用AbstractReactivedyeisthemaindyeincellulosicfibersdyeing,butthewetrubbingfastnessofreactivedyesisverypoor.Theinternationalstandardsanddomesticstandardsallowthewetrubbingfastnessislevel2-3,butconsumershavebecomesoincreasinglyharshdemandingforthewetrubbingfastnessinrecentyearsthatthey
4、oftenrequirethestandardisabovelevel3.However,thepresentdyeingtextiles,especiallythetextilesindeepcolorarenotabletosatisfytheconsumers.Therefore,toimprovethewetrubbingfastnesshasbecomeamajorchallengepersecutingcurrentdyeingindustry.Anewtypeofmoderateaqueouspolyurethane-typewetrubbingfastnessimproverw
5、hichiscalledaswetrubbingfastnessimproverCWwassynthesized.Theimproverismadeupofdiisocyanateandlowmolecularpolyetherandworkswithfivemechanismsinone-adsorption,precipitation,filmforming,fixing,andcross-linking.Thesynthesisprocessisdeterminedasfollows:n(PPG)/n(PEG)=1:1:1;Rvalues(-NCO;dimethylolpropionic
6、acid(DMPA)dosageof3.07%;themountratioofchainextenderagentdiethylenetriamine,epichlorohydrincross-linkerandMDI1:1:1;pre-polymerizationtemperature70cpre-polymerizationtime2.5h;diethylenetriaminereactiontemperature50C,reactiontime2h;theepichlorohydrinreactiontemperature50,reactiontime30min.Throughexper
7、iments,theapplicationprocessofwetrubbingfastnessimproverCWisestablishedasfollows:two-dip-two-nip(CW30g/1,pH78,pick-up100%110%)drying(100)curing(150C120S)ApplicationresultsshowthatthroughthewetrubbingfastnessimproverCWtreatment,thewetrubbingfastnessisimprovedobviouslyandreachesuptolevel3.Theinnovatio
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- 水性 聚氨酯 合成 应用
