CN1243473A - 纤维素织物的交联剂 - Google Patents

纤维素织物的交联剂 Download PDF

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CN1243473A
CN1243473A CN98801834A CN98801834A CN1243473A CN 1243473 A CN1243473 A CN 1243473A CN 98801834 A CN98801834 A CN 98801834A CN 98801834 A CN98801834 A CN 98801834A CN 1243473 A CN1243473 A CN 1243473A
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C·Q·杨
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University of Georgia Research Foundation Inc
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Abstract

如棉织物和纸的纤维素材料可用一种组合物交联,这种组合物包含(A)烯键不饱和聚羧酸单体或其盐的聚合物,所述单体有一个或多个位于毗邻碳原子上的二羧基;(B)饱和α-羟基多羧酸或其盐;和(C)一种或多种固化催化剂。加热并通过纤维素羟基与(A)和(B)的反应产物中的羧基的反应引起酯化和交联。

Description

纤维素织物的交联剂
                           发明领域
本发明涉及用无甲醛的组合物处理纤维素材料的方法、无甲醛的组合物以及处理后的材料。
                           本发明背景
纤维素材料,如织物和纸的物理性能经常可以通过化学处理使纤维素分子交联来增强。对织物,这样的处理可以提供抗皱性、防缩性、免烫和折缝耐久性,对纸类,可提高湿强度。
由于甲醛类试剂的相对低廉和有效性,过去一直使用甲醛类试剂,如二羟甲基二羟基亚乙基脲(DMDHEU)进行处理,为纤维素织物提供有用的特性。脲-甲醛和蜜胺-甲醛试剂可用作湿增强剂,增强纸的湿性能。然而,甲醛是一种刺激物和已知的致癌物。另外,用甲醛类试剂处理的纤维素织物会严重损失其强度。
因此,自80年代以来,寻找用于纤维素织物的非甲醛交联剂一直是织物整理工业的焦点。研究的新型交联剂中有聚羧酸。许多种聚羧酸一直作为有效的耐久性熨烫整理剂。
例如,1,2,3,4-丁烷四甲酸(BTCA)为纤维素纺织品提供了有效的交联,使织物具备高抗皱性和耐洗性。虽然人们尽了很大的努力使用BTCA作为非甲醛的耐久性熨烫整理剂,代替传统的甲醛类试剂,但是BTCA过高的成本使它不能在纺织工业得以广泛应用。
尽管我们知道,其羧酸基团与分子骨架中毗邻的碳原子键合的聚羧酸在酯化纤维素中比其羧酸基团与相隔碳原子键合的聚羧酸更有效;这类聚羧酸的有效性仍不能满足大规模生产的需求。
也曾经尝试以柠檬酸作为纤维素织物的交联剂。然而,事实上柠檬酸仅具有中等效果,并且耐洗性差,织物会泛黄而无法使用,因此,不希望使用柠檬酸。
迫切需要能提供满意的交联性和优良的织物强度保持率的成本有效的非甲醛交联剂。本发明满足了这一需求。申请人已经发现价格相对低廉的聚羧酸和α-羟基多羧酸的独特组合,当它们在催化剂存在下就地反应时,能提供优良的纤维素交联以及纤维素织物的强度保持率。用组合的聚羧酸和α-羟基多羧酸处理纸也显著改善了纸的湿性能。
                           发明概述
本发明第一方面提供了交联的纤维素材料,其中的纤维素羟基可通过由(A)烯键不饱和多羧酸单体或其盐的聚合物和(B)饱和α-羟基多羧酸或其盐就地反应产生的羧基进行酯化,烯键不饱和聚羧酸单体有一个或多个位于毗邻碳原子上的二羧基。
本发明第二方面提供了用于纤维素材料的可水分散的处理溶液或干混合物,它们包含(A)烯键不饱和多羧酸单体或其盐的聚合物,所述单体有一个或多个位于毗邻碳原子上的二羧基,和(B)饱和α-羟基多羧酸或其盐。溶液或干混合物中还可以存在一种固化催化剂(C),或在处理时,在处理溶液中加入固化催化剂。
本发明第三方面提供了处理纤维素材料的方法,该方法包括下列步骤:使含羟基的纤维素材料与一种组合物接触,所述组合物包含(A)烯键不饱和多羧酸单体或其盐的聚合物,所述单体有一个或多个位于毗邻碳原子上的二羧基,(B)饱和α-羟基多羧酸或其盐,和(C)固化催化剂;加热该材料,使饱和酸(B)与聚合物(A)反应,和酯化和交联纤维素织物中的羟基。本发明还包括经这种处理后的纤维素材料。
                    优选实施方案的详细描述
本发明基于这一令人惊奇的发现,即在处理的纤维素织物的固化条件下,烯键不饱和的多羧酸单体或其盐的聚合物,其单体有一个或多个位于毗邻碳原子的二羧基,本文中被称作多羧酸聚合物(A)会与(B)饱和α-羟基多羧酸就地反应,能协同改善纤维素织物的抗皱性,还能提高其他纤维素材料的性能,如纸产品的性能。
本发明的多羧酸聚合物(A)能独立地与纤维素材料的羟基反应。然而,为了能与纤维素反应,多羧酸聚合物(A)必须具有足够的流动性,以便与纤维素中的羟基反应。较大的多羧酸聚合物缺乏流动性,或者当多羧酸聚合物与纤维素羟基之间形成酯键时,其流动性下降,使织物不能达到最佳的耐久熨烫整理。
α-羟基多羧酸(B)也能和纤维素羟基反应。然而,已经观察到α-羟基会阻碍聚羧酸对纤维素羟基的酯化。
虽然不希望受任何特定理论的束缚,我们相信,本发明得到的会产生增强协同效果的反应式示于图1。
Figure A9880183400081
                           反应式I其中,A’代表本发明多羧酸聚合物(A),B’代表本发明α-羟基多羧酸(B)。
因此,α-羟基多元酸如柠檬酸(B’)通过与多羧酸聚合物(A’)反应,由三官能物质转变为四官能态(D),形成纤维素材料的更柔性的支链交联剂(D),由此明显增强了织物的耐久熨烫性能和机械强度。
本发明可应用于纤维状的纤维素材料,包括棉花、亚麻、黄麻、大麻、苎麻和再生的未取代的木质纤维素,如人造纤维。公开的方法可应用于机织物、非织造片或网或针织织物形式的纤维状纤维素材料,也可应用于纤维、纱线或长丝。本发明还可应用于纸类产品,如由湿的纤维素纸浆生产的产品,包括文具和纸板产品、卡片纸和包装材料、高耐磨纸(如纸币原材料)。公开的方法对含不小于30%纤维素纤维的材料特别有用;尤其是含约50-100%棉花的材料。
如上所述,本发明聚合物(A)基于有一个或多个位于毗邻碳原子上的二羧基的二羧酸单体。多羧酸聚合物(A)任选有一个或多个不相邻的羧基或非羧基活性氢基团。这类非羧基基团包括羟基、伯胺基、仲胺基、硫醇和它们的组合。
这类多羧酸聚合物(A)是加成聚合物,可以从马来酸和富马酸,或它们的酐中至少一种单独形成,或与一种或多种其它能与之聚合的单体共聚合制得,如丙烯酸、甲基丙烯酸、巴豆酸、衣康酸、阿康酸(和它们的酯)、丙烯腈、丙烯酰胺、乙酸乙烯酯、苯乙烯、α-甲基苯乙烯、甲基乙烯基酮、乙烯醇、丙烯醛、乙烯和丙烯。例如,在美国专利3,810,834、4,126,549和5,427,587中描述了对本发明有用的多羧酸聚合物及其制备方法。优选实施方案中,多羧酸聚合物(A)是马来酐均聚物的水解产物。本发明其它的实施方案中,多羧酸聚合物(A)是源自马来酐和一种或多种其它单体共聚物的水解产物。例如,较好的是马来酐、乙酸乙烯酯和丙烯酸乙酯的三元共聚物的水解产物。本发明的一些实施方案中,马来酐与其它单体的摩尔比值在约2.5∶1至9∶1的范围。
本发明较好的多羧酸聚合物(A)有下面通式:
Figure A9880183400091
其中,R1和R2各自独立地是H、取代或未取代的C1-C5烷基或芳基,x和z是正的有理数或0,y是正有理数,x+y+z=1。本发明的有些方面,y大于0.5,即大于50%的聚合物(A)。当要求较低的羧基密度以提高酐基的流动性时,y小于0.9,即90%聚合物(A)为佳。因此y的合适范围约为0.5-0.9。在此使用的烷基指饱和、不饱和、支链和无支链的烷基。烷基上的取代基或聚合物(A)上的取代基包括但不限于羧基、羟基、烷氧基、氨基和烷硫基取代基。
本发明的聚合物(A)的数均分子量约为400-1,000,000,尽管本领域的技术人员会认为某些分子量会更适合用于一些特定的纤维素基材。优选数均分子量约为400-4,000的聚合物较适用于纤维素纺织品。数均分子量在约40,000-1,000,000范围的聚合物更适用于纸类纤维素基材。
饱和α-羟基多羧酸(B)含有至少两个连接在毗邻碳原子上的羧基。优选的实施方案中,羧酸包含一个或多个C2-C9的聚羧酸,各聚羧酸含有至少两个,或多至四个或更多的羧基。这样的α-羟基多羧酸的例子包括,但不限于柠檬酸、马来酸和有下面结构式的酒石酸单琥珀酸(tartrate monosuccinic acid):
Figure A9880183400092
有些情况下,为了提高处理溶液的pH以改善浴液或添加剂的相容性和/或用于改善强度保持率,部分组分(A)和(B)中一种或两者以盐的形式使用,尤其是作为水溶性盐。适合这一目的的是组分的碱金属盐。或者,A或B的任一种以盐的形式结合起来使用,可提高处理溶液的pH值,或者通过加入碱使溶液部分中和,碱以水溶性碱为佳,如碱金属氢氧化物、氢氧化铵或胺。这样,pH可升高至约2.3-5,约2.5-4为宜。然而,如果使用浓度相对较高的处理溶液,如固含量约10-30%的溶液,优选以组分(A)和(B)的酸形式,或至少以组分(A)的酸形式形成处理溶液,如果需要,然后按照所述的方式提高处理溶液的pH。其原因是组分的盐,至少是组分(A)的盐在高浓度时会沉淀。这种趋势(组分(A)的这种趋势大于组分(B))随处理溶液的稀释而减小。
可以理解最终产品抗皱性的部分损失是由于pH升高和使用盐形式的组分(A)或(B),或两者的结果。然而,如果保持或改善了其它重要性能,如强度或抗撕裂性,这样的损失还是可以接受的。
聚合物烯键不饱和羧酸或其盐(A)与α-羟基多羧酸混合物(B)的重量比值一般为1∶0.1至1∶20,1∶3至1∶5为佳。
本发明的催化剂(C)是分子量小于1000的化合物,例如碱金属次磷酸盐、碱金属亚磷酸盐、碱金属多磷酸盐、碱金属磷酸二氢盐、碱金属磷酸盐、碱金属磷酸氢盐、多磷酸、次磷酸、磷酸、烷基次磷酸(alkyl phosphinic acid)或它们的两种或多种的混合物。固化催化剂还可以是含有亚磷基团的低聚物或聚合物,例如,在次磷酸钠存在下形成的丙烯酸和/或马来酸的加成聚合物、在亚磷酸盐链转移剂或终止剂存在下由烯键不饱和单体制得的加成聚合物、和含酸官能单体残余物的加成聚合物,例如美国专利4,820,307和5,427,587中所述,共聚的甲基丙烯酸磷酸乙酯和类似的亚磷酸酯、共聚的乙烯基磺酸单体及其盐。本发明的有些方面也考虑到这样的两种或多种催化剂的混合物。本发明的有些方面特别优选次磷酸钠。
催化剂(C)的用量,可为多羧酸聚合物和α-羟基多羧酸的总重量的约2-100%。约为10-60%为佳。
如上指出,可用常规的混合技术混合组分(A)、组分(B)和催化剂(C),将它们分散在含水介质中形成溶液,或形成干混合物。
此外,溶液或干混合物还可含有常规的处理组分,如织物柔软剂、润湿剂、乳化剂、防泳移剂和抗菌剂。
本发明的方法为首先使纤维素材料,如织物,与含多羧酸聚合物(A)、α-羟基多羧酸(B)和一种或多种固化催化剂(C)的处理溶液接触。纤维素材料可任选与溶剂、任选的添加剂,如织物柔软剂、润湿剂、和/或其它添加剂接触。例如,可通过浸轧、浸渍、喷雾等进行接触。例如,将纤维素织物浸在处理溶液中。形成溶液的溶剂优选水,尽管可以使用任何可以溶解或均匀分散多羧酸聚合物(A)、α-羟基多羧酸(B)和一种或多种固化催化剂(C)的其他惰性挥发溶剂。织物柔软剂可以是乳化的非离子型或离子型物质,如聚乙烯和/或硅柔软剂。
纤维素材料在处理浴中被完全润湿后,从挤压辊间通过,或旋转除去过量的液体,或在确定的时间内在足以除去溶剂的合适温度下,用加热箱干燥。然后在加热箱内约130-210℃固化约5秒-30分钟。
本领域的技术人员会理解固化时间和温度部分取决于固化材料的厚度。例如,对片型厚度的织物,可在约150-210℃加热约30秒-2分钟,使多羧酸聚合物(A)和α-羟基多羧酸(B)发生反应,并使纤维素酯化和交联。对较厚的织物要求更高温度和更长的加热时间。较厚织物宜在烘箱内,于约150-190℃下固化约1.0-15.0分钟,在约160-185℃固化约1.0-15.0分钟最好,使聚羧酸聚合物(A)和α-羟基多羧酸(B)发生反应,纤维素发生酯化和交联。这种方法对材料在形成或不形成具体形状并且在以后再固化时也是有用的。
如果需要,固化后的材料随后用水漂洗,以除去未反应的试剂和固化催化剂,然后再干燥。
在使产品褪色时,可以用含0.5-5%(重量)褪色剂的水溶液,如单过苯二甲酸镁、过硼酸钠、四硼酸钠、硼酸、氢硼化钠或次氯酸钠水溶液浸湿材料进行处理。材料浸在褪色剂溶液中,于室温下浸渍5-120分钟,或者,如果必要,还可加热该溶液但不超过60℃。材料随后用水漂洗,以除去过量的化学品和溶解的着色产物,然后干燥。
按照这种方式处理后的纤维素织物可用于耐久性熨烫服装。本发明还可用于制备性能改善的波纹纸板、纸盒和其它纸类产品、以及包含特性化的纤维素织物卫生用品。
                           实施例
下面实施例仅作为说明,对本发明不构成限制。说明书和权利要求书中,除非特别指出,所有的份和百分数均按重量计。
                           材料
用于固化(cure)前整理和固化后整理的棉织物是由Miliken,Blacksburgh,SouthCarolina提供的3×1斜纹组织的100%棉织物(8盎司/码2),用还原染料(S/5570C/45551 Khaki)染色。用于成衣整理的棉织物是由Mt.Vernon Mill,Trion,Georgia提供的Excalibur斜纹组织的100%棉织物,WHTW型,用还原染料(9119 Khaki)染色。牛皮纸(74克/米2)由Georgia Pacific生产。由FMC公司提供聚(马来酸)(PMA)和马来酸、丙烯酸乙酯和乙酸乙烯酯的三元共聚物(5∶1∶1的摩尔比)(TPMA),它们是数均分子量分别约为800-1000和约1200-1500的约50%固含量的水溶液。TPMA溶液的羧基浓度由酸碱滴定法测定。经测定,TPMA为5.56毫摩尔羧基/克和34.7%活性组分浓度(w/w)。表1提供了试剂的名称和生产商。
                              表1
                        试剂的名称和生产商
          名称    说明 生产商
马来酸三元共聚物(TPMA) 共交联剂 FMC公司
柠檬酸(CA) 共交联剂 ADM
1,2,3,4-丁烷四羧酸(BTCA) 交联剂 Aldrich(Milwallkee,Wisconsin)
Permafresh EFC 预催化DMDHEU基耐久性熨烫系统 Sequa(Chester,South Carolina)
NaH2PO2·H2 催化剂 Occidental Chemical
Discores LFR 自催化DMDHEU基耐久性熨烫系统 Callaway Chemical(Columbus,Georgia)
Mykon HD 高密度聚乙烯织物柔软剂 Sequa Chemicals(Chester SouthCarolina)
Discosoft NIP 高密度聚乙烯织物柔软剂 Callaway Chemicals(Columbus,Georgia)
Protosil NYS 硅烷基织物柔软剂 Sybron(Wellford,South Carolina)
Discosoft WRS 硅烷基织物柔软剂 Callaway Chemicals(Columbus,Georgia)
Wet 16 润湿剂 Sequa Chemicals(Chester SouthCarolina)
Callaterge CNN 润湿剂 Callaway Chemicals(Columbus,Georgia)
甘油 柔软剂 Aldrich(Milwalkee,Wisconsin)
Na3PO4·12H2O pH调节剂 Aldrich(Milwallkee,Wisconsin)
                           织物处理固化前整理
首先将棉织物浸在含交联剂、催化剂、润湿剂和织物柔软剂的整理浴中。用磷酸三钠调节该整理液的pH。采用已知的两次浸液两次挤压法,在Cromax实验室浸染机的挤压辊间挤压浸渍后的织物样品。浸渍后织物的湿吸液率(wet pick-up)在70-77%范围。织物在85℃干燥5分钟,然后在Mathis固化箱内固化。
除非特别指出,处理后的棉织物在185℃固化3分钟。
成衣整理
将棉织物裁制成30×9英寸的裤腿。将约15磅的成衣放入加有整理溶液的Unimac设备中。设备运转8分钟,脱液1分钟。浸渍的成衣脱水37秒,以保持~70%湿吸液率。处理后的成衣在50磅Huebsch烘干机内滚动烘干12分钟,达到~13%湿含量。在专门的蒸汽熨烫设备中选用长周期熨烫这些成衣。最后,在Despath Model LT2-12固化炉内,在特定温度下处理这些成衣。
                        纸的处理
首先将纸切割成25×25厘米的片。每一片浸在含酸和催化剂(次磷酸钠)(酸与催化剂比值为2∶1w/w)的溶液中。浸渍后的纸在两个挤压辊之间,在40psi下挤压除去过量的溶液,然后在转鼓烘干机中于80℃烘干以防卷曲。处理后的片在强制通风箱内固化,然后在水中漂洗15分钟,除去未反应的酸和催化剂,最后在80℃干燥。
                        织物性能的评价
根据下面的标准方法评价整理后的棉织物的公定折皱回复角(WRA)、耐久熨烫(DP)率、抗张强度、抗撕裂强度和耐屈曲磨损性:WAR:AATCC试验法66-1990;DP率:AATCC试验法124-1992;抗张强度:ASTM试验法D5035-90;抗撕裂强度:ASTM试验法D1424-83;和耐磨损性:ASTM试验法D3885-92。评价一次家用洗涤/烘干周期(HLWD)后织物的所有性能。还评价了在不同家用洗涤/烘干周期次数后整理的织物性能。根据AATCC标准法124-1992进行家用洗涤步骤。
                        纸的性能评价
根据下面的TAPPI标准法:T404om-87、T456om-87、T489om-86和T511om-88,分别评价纸的干抗张强度、湿抗张强度、湿硬挺度和耐折度(MIT试验机)。测量纸张加工方向上的机械性能。测量垂直加工方向的尺寸稳定性(DS)。1.5×10厘米的纸带在50%相对湿度下调节24小时,然后测定纸带的长度。将纸带浸在水中24小时,然后测定浸渍后的纸带长度。浸渍前的纸带长度减去浸渍后纸带长度,可计算出线性的尺寸变化(L)。用下面公式可计算尺寸稳定性:
DS=[(Lu-Lt)/Lu]×100%其中,Lu和Lt是未处理纸带和用酸溶液处理后纸带的线性尺寸变化。每种纸样品测10个试样,获得平均DS。
                  新的耐久性熨烫整理操作:固化前整理
表1所示为不同马来酸三元共聚物/柠檬酸比值的整理液配方。各整理溶液的羧基浓度约等于8%CA。由酸碱滴定测定TPMA的羧基浓度。用含有4%NaH2PO2的整理溶液处理棉织物。
用表2溶液处理的织物的性能列于表3。这些数据表明,TPMA/CA羧基摩尔比值为1∶1.45(17/83重量比)的整理溶液可提供最大WRA和优良的强度保持率。
                       表2
                   织物整理溶液
  样品 TPMA/CA(COOH摩尔比) CA羧基摩尔% CA重量%
  A1     1∶0     0     0
  A2     1∶0.5     33     34
  A3     1∶1     50     51
  A4     1∶2     67     68
  A5     1∶3     75     76
  A6     1∶3.5     78     79
  A7     1∶4     80     81
  A8     1∶4.5     82     83
  A9     1∶5     83     84
  A10     0∶1     100     100
                                 表3
                  干的棉织物的WRA、抗撕裂强度和抗张强度保持率
 样品   TPMA/CACOOH摩尔比    WRA(度)(W+F)   抗撕裂强度(%)     抗张强度(%)
    W     F     W     F
  A1     1∶0     243     59     46     76     56
  A2     1∶1     255     57     43     70     49
  A3     1∶2     247     58     44     66     44
  A4     1∶3     157     56     43     65     44
  A5     1∶3.5     259     56     42     66     46
  A6     1∶4     257     56     42     64     47
  A7     1∶4.5     261     56     43     67     48
  A8     1∶5     253     56     44     64     46
  A9     0∶1     258     57     43     66     43
 对照     0     162     100     100     100     100
              没有柔软剂下比较TPMA/CA与BTCA和DMDHEU
表4所示为新的耐久性熨烫整理系统与BTCA和DMDHEU的比较,TPMA提供了优于DMDHEU的WRA和织物强度,能与BTCA相媲美的WRA和织物强度。
                        表4
      整理液配方和用不同整理系统整理的棉织物的性能
  样品   整理系统   总整理浓度(%,owf)   催化剂浓度(%,owf) 固化温度(℃)    固化时间(分钟)   WRA(W+F)度    抗撕裂强度保持率(%)     抗张强度保持率(%)
  W   F   W   F
  B1  TPMA/CA(pH2.11)A     8.0     4.0   185     3.0   264   52   41   68   42
  B2  TPMA/CA(pH2.45)A     8.0     4.0   185     3.0   262   51   42   66   50
  B3  BTCA     6.2     4.0   180     1.5   262   60   47   63   44
  B4  DMDHEU     8.0     自催化   170     3.0   234   36   31   43   31
A:TPMA/CA配方含1∶4.5TPMA/CA的羧基摩尔比。用Na3PO4调节TPMA/CA溶液的pH至2.45。使用NaH2PO2作为TPMA/CA和BTCA液的催化剂。
B:永久新鲜的(Permafresh)EFC(自催化的耐久性熨烫整理)用于DMDHEU系统。
                    加入织物柔软剂的效果
用TPMA/CA系统处理的棉织物性能与在织物柔软剂和润湿剂存在下用DMDHEU处理的性能作了比较。用磷酸三钠将TPMA/CA系统的pH调节至2.4和2.7。TPMA/CA、BTCA和DMDHEU的整理配方列于表5。
表6列出了用不同系统处理的棉织物的固化温度、固化时间、WRA、DP率、抗张强度、抗撕裂强度和耐屈曲磨损。用pH为2.4和2.7的TPMA/CA配方整理的两个织物样品表明,其WRA和DP率大大高于用DMDHEU系统整理的织物,其抗张强度和抗撕裂强度可以和用DMDHEU整理的织物相媲美。pH为2.7的TPMA/CA整理液比pH为2.4的同样整理液有更高的织物抗张强度和抗撕裂强度。用TPMA/CA(pH=2.7)处理的织物的耐屈曲磨损性可与用DMDHEU处理的相媲美。
表7列出了30次家庭洗涤/烘干周期(HLWD)后整理的棉织物的抗张强度保持率、抗撕裂强度保持率和耐屈曲磨损性。观察到30次HLWD周期后,用两种TPMA/CA配方整理的织物,其抗张强度、抗撕裂强度和耐屈曲磨损性优于用BTCA和DMDHEU整理的织物。
                        表5
            TPMA/CA、BTCA和DMDHEU系统的配方
    配方      组分   溶液浓度(%),w/w
  TPMA/CA(pH2.4)   TPMA(100%)         2.0
  CA         9.4
  NaH2PO2·H2O         6.8
  Na3PO4·12H2O         1.5
  Mykon HD         3.0
  Wet 16         0.2
  TPMA/CA(pH2.7)   TPMA(100%)         2.0
  CA         9.4
  NaH2PO2·H2O         6.8
  Na3PO4·12H2O         3.0
  Mykon HD         3.0
  Wet 16         0.2
  BTCA   BTCA         8.6
  NaH2PO2·H2O         6.8
  Mykon HD         3.0
  Wet 16         0.2
  DMDHEU  (Permafresh)EFC         11.4
  Mykon HD         3.0
  Protosil NYS         3.0
  Wet 16         0.2
  水         82.4
                            表6
洗涤前,在柔软剂存在下,用不同系统整理的棉织物的公定折皱回复角、
         抗张强度保持率、抗撕裂强度保持率和耐屈曲磨损性
样品   整理系统   固化温度(℃)   固化时间(分钟)   WRA(W+F)度   DP率     抗撕裂强度保持率(%)      抗张强度保持率(%)      耐屈曲磨损性
  W   F   W  F   W   F
 C1  TPMA/CA(pH=2.4)   185   3.0   285   4.1   93   75   65  44   176   750
 C2  TPMA/CA(pH=2.7)   185   3.0   283   4.1   97   83   62  46   228   880
 C3  BTCA   180   2.0   303   4.2   99   74   62  43   174   680
 C4  DMDHEU   170   3.0   261   3.6   100   77   53  43   226   824
 对照    -   185   3.0   176   1.0   100   100   100  100   338   1317
                            表7
     不同系统处理30次HLMD周期后,棉织物的抗强度保持率、
                 抗撕裂强度保持率和耐屈曲磨损性
  样品  整理系统  抗撕裂强度保持率(%)  抗张强度保持率(%)     耐屈曲磨损性
    W     F    W     F   W    F
  C1  TPMA/CA(pH=2.4)     73     70    63     52   221   1082
  C2  TPMA/CA(pH=2.7)     75     71    64     55   343   1119
  C3  BTCA     64     59    64     49   195   923
  C4  DMDHEU     56     55    54     49   229   820
                     整理后的棉织物的耐洗性
表8和9列出了棉织物经不同整理系统处理后的耐洗性。30个洗涤/烘干周期后,TPMA/CA处理的织物的WRA仍比DMDHEU处理织物高20度(表8)。洗涤/烘干过程后,TPMA/CA处理的织物的外观光滑度也高于用DMDHEU处理的织物(表9)。这些数据表明,30个HLWD周期后,TPMA/CA系统处理的棉织物显示满意的耐洗性,能保持高于DMDHEU处理织物的DP性能和机械强度。
                                    表8
                30个HLWD周期中不同整理系统处理的棉织物的WRA
  样品       整理系统                    HLWD周期次数
  0   5   10   20   30
  C1   TPMA/CA(pH=2.4)   285   276   263   255   250
  C2   TPMA/CA(pH=2.7)   283   267   250   249   247
  C3   BTCA   303   281   266   262   262
  C4   DMDHEU   261   245   247   226   226
                                   表9
             30个HLWD周期中不同整理系统处理的棉织物的DP率
  样品       整理系统                   HLWD周期次数
  0   5   10   20   30
  C1   TPMA/CA(pH=2.4)   4.1   3.9   3.7   3.4   3.4
  C2   TPMA/CA(pH=2.7)   4.1   3.6   3.4   3.3   3.2
  C3   BTCA   4.2   3.8   3.7   3.6   3.5
  C4   DMDHEU   3.6   3.1   3.1   3.0   3
                        整理后的棉织物的性能:成衣
表10列出了用于成衣整理的TPMA/CA系统和DMDHEU系统的整理配方。
表11中比较了用TPMA/CA系统处理的棉质长裤和用DMDHEU类系统处理的成衣的性能。数据很清楚地表明:用TPMA/CA系统处理的成衣,其耐折皱性和机械性能(抗张强度,抗撕裂强度和耐屈曲磨损性)均优于用常规DMDHEU类整理系统处理的成衣。
                        表10
     用于成衣整理的TPMA/CA和DMDHEU系统的配方
  整理系统      组分   溶液浓度(%),w/w
  TPMA/CA(pH=2.4)  TPMA(100%)     2.0
 CA     9.4
 NaH2PO2·H2O     6.8
 Na3PO4·12H2O     1.5
 Mykon HD     ~3.0
 Discosoft WRS     4.0
 Wet 16     0.2
  TPMA/CA(pH=2.7)  TPMA(100%)     2.0
 CA     9.4
 NaH2PO2·H2O     6.8
 Na3PO4·12H2O     ~3.0
 Mykon HD     3.0
 Discosoft WRS     4.0
 Wet 16     0.2
  DMDHEU  Discores LFR     12.0
 Discosoft NIP     3.0
 Discosoft WRS     4.0
 Callaterge CNN     0.1
                                    表11
                   用不同整理系统处理的成衣的性能比较
  样品 固化温度(℃)   固化时间(分钟)  调整后折皱回复角(W+F,度)   抗撕裂强度保持率(%)   抗张强度保持率(%)    耐屈曲磨损性
 洗涤前   10个HLWD周期后   W   F   W   F  W  F
 TPMA/CA(pH=2.4) 165     8   327     290   54   39   78   76  110  677
 TPMA/CA(pH=2.7) 165     8   322     291   53   47   83   83  146  795
165     10   327     287   59   42   84   84  107  598
170     6   330     282   57   41   74   79  120  736
  DMDHEU 160     8   290     274   38   32   57   53  102  443
  对照  -     -   198      -   100   100   100   100  309  467
                      处理后的牛皮纸的性能
牛皮纸用含总浓度为6%,但柠檬酸(CA)和聚(马来酸)(PMA)比例不同以及催化剂的溶液处理。处理后的样品纸在170℃固化2分钟。表12中列出了用不同CA/PMA比值的溶液处理后的牛皮纸的干抗张强度(D)、湿抗张强度(W)、湿抗张强度百分数([W/D]×100)。这种处理对纸的干强度几乎没有影响。然而处理后纸的湿强度明显增强。通过混合CA和PMA处理后纸的性能得到增强。当酸溶液含有20%PMA时,湿强度保持率从51.2%提高到63.1%。进一步提高酸混合物中PMA量,对处理后纸的湿性能没有太大的影响。发现处理后的纸的耐折性下降。
                                表12
           用不同CA/PMA比例的溶液处理后并化170℃固化2分钟后
                牛皮纸的干强、湿强、湿强保持率和耐折性
  CA-PMA比值(W/W)   对照*   1∶0   4∶1   2∶1   1∶1   1∶2   1∶4   0∶1
  总酸中的PMA%(W/W)    -   0   20   33   50   67   75   100
  干强度(千克)   7.53   7.66   7.24   7.35   7.25   7.59   7.65   7.79
  湿强度(千克)   0.67   3.92   4.57   5.07   5.19   5.55   5.75   5.99
  W/D(%)   13.8   51.2   63.1   69.0   71.6   73.1   75.2   76.9
  耐折性   327   31   16   8   7   6   6   6
*对照组用水处理,在相同温度下固化。
                         总酸浓度的影响
牛皮纸样品用含混合PMA和CA(CA-PMA比值为4∶1)以及催化剂的溶液处理。总酸浓度在0.5-8.0%(W/W)范围。处理后的样品纸在170℃固化2分钟。干抗张强度、湿抗张强度、湿强度保持率百分数、尺寸稳定性和耐折性列于表11。由表11可知,提高总酸量会显著提高处理后的纸的湿强度、湿强度保持率和尺寸稳定性。纸的湿性能的提高伴随着耐折性的明显下降,尤其是在加入大量酸时。在加入较少量酸,如用总酸浓度为2%的溶液处理纸时耐折性没有明显损失,同时能适当提高纸的湿性能(表13)。
                                  表13用不同浓度的CA/PMA溶液*处理牛皮纸,并在170℃固化2分钟后,其干强度、
      湿强度、湿强度保持率、尺寸稳定性和耐折性
    纸性能                      总酸浓度(%,W/W)
0.0  0.5  1.0  2.0  4.0  6.0  8.0
    干强度(千克) 7.53  7.18  7.08  7.34  7.61  7.24  7.62
    湿强度(千克) 1.04  1.48  1.62  2.56  3.68  4.57  5.10
    W/D% 13.8  20.6  22.9  34.9  48.4  63.1  66.9
    尺寸稳定性(%) 9.1  12.8  20.5  31.8  43.0  50.2  58.7
    耐折性(时间) 327  319  285  172  36  19  7
*所有溶液的CA/PMA比为4∶1,含有催化剂。
                           柔软剂的作用
通过在酸溶液中加入柔软剂(如甘油)可以提高处理后纸的耐折性。表14中所列为用有甘油和没有甘油的两种CA/PMA溶液处理后的纸的干抗张强度、湿抗张强度、湿抗张强度保持率和耐折性。数据表明:使用甘油后稍微降低处理后纸的湿强度,但明显提高了耐折性。
                          表14用有柔软剂和没有柔软剂的CA/PMA溶液*处理牛皮纸,并在170℃固化2分钟
后,其干强度、湿强度、湿强度保持率、尺寸稳定性和耐折性
 甘油浓度(%,W/W)   干强度(千克)   湿强度(千克)   W/D(%)  耐折性  尺寸稳定性
    0.0    7.41    5.48   74.0     6     71.7
    20.0    6.88    3.31   48.1     205     41.3
*两种溶液的总酸浓度相同,为6%,CA-PMA比值相同,为2∶1。

Claims (34)

1.一种交联的纤维素材料,它包含可用(A)一种或多种烯键不饱和多羧酸单体或其盐的聚合物;与(B)一种或多种饱和α-羟基多羧酸或其盐的反应产物上的羧基进行酯化的纤维素羟基,(A)中所述单体有一个或多个位于毗邻碳原子上的二羧基;所述(B)中的至少两个羧基连接在毗邻的碳原子上。
2.如权利要求1所述的纤维素材料,其特征在于,所述烯键不饱和多羧酸单体的聚合物(A)有下面结构式:
Figure A9880183400021
其中,R1和R2各自独立地是H、取代或未取代的C1-C5烷基或芳基,x和z是正的有理数或0,y是正有理数,x+y+z=1。
3.如权利要求2所述的纤维素材料,其特征在于y是1。
4.如权利要求2所述的纤维素材料,其特征在于,所述的R1是丙烯酸或其酯的残基,R2是一个或多个除丙烯酸或其酯以外的乙烯基单体的残基,y约为0.5-0.9。
5.如权利要求1所述的纤维素材料,其特征在于,所述一种或多种饱和α-羟基多羧酸(B)选自柠檬酸、马来酸或酒石酸单琥珀酸。
6.如权利要求1所述的纤维素材料,其特征在于,所述(A)烯键不饱和多羧酸聚合物与(B)饱和α-羟基多羧酸的重量比值为1∶0.1至1∶20。
7.如权利要求1-6中任一权利要求所述的纤维素材料,其特征在于,所述聚合物(A)是马来酐的水解共聚物、或马来酐、乙酸乙烯酯和丙烯酸乙酯的水解共聚物,所述饱和α-羟基多羧酸(B)是柠檬酸或其盐。
8.一种用于处理纤维状纤维素材料的组合物,该组合物包含:
(A)一种或多种烯键不饱和多羧酸单体或其盐的聚合物,所述单体有一个或多个位于毗邻碳原子上的二羧基;(B)一种或多种饱和α-羟基多羧酸或其盐,其中至少两个羧基连接在毗邻碳原子上;和任选的(C)一种或多种固化催化剂。
9.如权利要求8所述的组合物,其特征在于,混合所述聚合物(A)和所述α-羟基多羧酸(B),形成干混合物。
10.如权利要求8所述的组合物,其特征在于,将所述聚合物(A)和所述α-羟基多羧酸(B)分散在含水介质中。
11.如权利要求8所述的组合物,其特征在于,所述组合物还包含一种或多种固化催化剂。
12.如权利要求11所述的组合物,其特征在于,所述一种或多种固化催化剂选自碱金属次磷酸盐、碱金属亚磷酸盐、碱金属多磷酸盐、碱金属磷酸二氢盐、碱金属磷酸氢盐、碱金属磷酸盐或它们的混合物。
13.如权利要求8所述的组合物,其特征在于,所述烯键不饱和多羧酸单体的聚合物(A)有下面结构式:
Figure A9880183400031
其中,R1和R2各自独立地是H、取代或未取代的C1-C5烷基或芳基,x和z是正的有理数或0,y是正有理数,x+y+z=1。
14.如权利要求13所述的组合物,其特征在于y是1。
15.如权利要求13所述的组合物,其特征在于,所述的R1是丙烯酸或其酯的残基,R2是除丙烯酸或其酯以外的乙烯基单体的残基,y为0.5-0.9。
16.如权利要求8所述的组合物,其特征在于,所述一种或多种α-羟基多羧酸(B)选自柠檬酸、马来酸或酒石酸单琥珀酸。
17.如权利要求8所述的组合物,其特征在于,所述(A)烯键不饱和多羧酸单体聚合物与(B)饱和α-羟基多羧酸的重量比值为1∶0.1至1∶20。
18.如权利要求8-17中任一权利要求所述的组合物,其特征在于,所述聚合物(A)是马来酐的水解共聚物、或马来酐、乙酸乙烯酯和丙烯酸乙酯的水解共聚物,所述α-羟基多羧酸(B)是柠檬酸或其盐。
19.一种用于处理纤维织物的方法,该方法包括下列步骤:
使纤维素材料与一种组合物接触,该组合物包含(A)一种或多种烯键不饱和多羧酸单体的聚合物或其盐,所述单体有一个或多个位于毗邻碳原子上的二羧基;(B)一种或多种饱和α-羟基多羧酸或其盐;和(C)一种或多种固化催化剂;
加热该材料使纤维素材料中的羟基与该材料的羧基产生酯化和交联。
20.如权利要求19所述的方法,其特征在于,所述烯键不饱和多羧酸单体的聚合物(A)有下面结构式:其中,R1和R2各自独立地是H、取代或未取代的C1-C5烷基或芳基,x和z是正的有理数或0,y是正有理数,x+y+z=1。
21.如权利要求20所述的方法,其特征在于y是1。
22.如权利要求20所述的方法,其特征在于,所述的R1是丙烯酸或其酯的残基,R2是一个或多个除丙烯酸或其酯以外的乙烯基单体,y为0.5-0.9。
23.如权利要求19所述的方法,其特征在于,所述一种或多种α-羟基多羧酸(B)选自柠檬酸、马来酸或酒石酸单琥珀酸。
24.如权利要求19所述的方法,其特征在于,所述一种或多种固化催化剂(C)选自碱金属次磷酸盐、碱金属亚磷酸盐、碱金属多磷酸盐、碱金属磷酸二氢盐或它们的混合物。
25.如权利要求19所述的方法,其特征在于,所述(A)烯键不饱和多羧酸单体聚合物与(B)饱和α-羟基多羧酸的重量比值为1∶0.1至1∶20。
26.如权利要求19-25中任一权利要求所述的方法,其特征在于,所述聚合物(A)是马来酐的水解共聚物、或马来酐、乙酸乙烯酯和丙烯酸乙酯的水解共聚物,所述α-羟基多羧酸(B)是柠檬酸或其盐。
27.交联的纤维素织物,可采用包括下列步骤的方法生产:
使纤维状纤维素织物与一种组合物接触,该组合物包含(A)一种或多种烯键不饱和多羧酸单体或其盐的聚合物,所述单体有一个或多个位于毗邻碳原子上的二羧基;(B)一种或多种饱和α-羟基多羧酸或其盐;和(C)一种或多种固化催化剂;
加热该织物使织物的纤维素上的羧基发生酯化反应和交联。
28.如权利要求27所述的纤维素织物,其特征在于,所述烯键不饱和多羧酸单体的聚合物(A)有下面结构式:
Figure A9880183400042
其中,R1和R2各自独立地是H、取代或未取代的C1-C5烷基或芳基,x和z是正的有理数或0,y是正有理数,x+y+z=1。
29.如权利要求28所述的纤维素织物,其特征在于y是1。
30.如权利要求28所述的纤维素织物,其特征在于,所述的R1是丙烯酸或其酯的残基,R2是除丙烯酸或其酯以外的乙烯基单体的残基,y约为0.5-0.9。
31.如权利要求27所述的纤维素织物,其特征在于,所述一种或多种α-羟基多羧酸(B)选自柠檬酸、马来酸或酒石酸单琥珀酸。
32.如权利要求27所述的纤维素织物,其特征在于,所述一种或多种固化催化剂(C)选自碱金属次磷酸盐、碱金属亚磷酸盐、碱金属多磷酸盐、碱金属磷酸二氢盐或它们的混合物。
33.如权利要求27所述的纤维素织物,其特征在于,所述(A)烯键不饱和多羧酸单体聚合物与(B)饱和α-羟基多羧酸的重量比值为1∶0.1至1∶20。
34.如权利要求27-33中任一权利要求所述的纤维素织物,其特征在于,所述聚合物(A)是马来酐的水解共聚物、或马来酐、乙酸乙烯酯和丙烯酸乙酯的水解共聚物,所述α-羟基多羧酸(B)是柠檬酸或其盐。
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