CN101358015A - 利用具有c2-c10羟烷基的丙烯酰胺/n-羟烷基丙烯酰胺交联混合物的自交联分散体 - Google Patents

利用具有c2-c10羟烷基的丙烯酰胺/n-羟烷基丙烯酰胺交联混合物的自交联分散体 Download PDF

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CN101358015A
CN101358015A CNA2008101294929A CN200810129492A CN101358015A CN 101358015 A CN101358015 A CN 101358015A CN A2008101294929 A CNA2008101294929 A CN A2008101294929A CN 200810129492 A CN200810129492 A CN 200810129492A CN 101358015 A CN101358015 A CN 101358015A
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乔尔·E·戈尔德施泰因
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Abstract

一种水分散体,包含自交联的含有羟烷基(甲基)丙烯酰胺的共聚物,所述共聚物是在乳液聚合介质中通过在介质中共聚以下物质而制备的:(a)(甲基)丙烯酰胺单体;(b)N-C2至C10羟烷基(甲基)丙烯酰胺单体,其中共聚的(甲基)丙烯酰胺∶N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为至少0.5;以及(c)至少一种或多种其它的烯键不饱和单体,其以基于所述介质中共聚的单体干重约80重量%到约98重量%的量添加到所述介质中。所述分散体作为纤维网的粘合剂是特别有用的。

Description

利用具有C2-C10羟烷基的丙烯酰胺/N-羟烷基丙烯酰胺交联混合物的自交联分散体
技术领域
本发明一般涉及自交联的聚合物分散体,并且在优选的实施方式中涉及包含乙酸乙烯基酯的聚合物的水分散体,该聚合物并入作为交联剂的丙烯酰胺/N-羟乙基丙烯酰胺的混合物。
背景技术
将聚合物分散体施加到非织物上以使网的纤维结合在一起,使得网显示出提高的拉伸强度或自支撑。适合的常规分散体包括乙酸乙烯基酯和乙烯与作为交联剂并入聚合物的N-羟甲基丙烯酰胺(NMA)的自交联聚合物。NMA交联剂提供增强的湿强度和耐有机溶剂性;然而这些组合物趋向放出被视为健康危害的甲醛。因此,进行了许多尝试以减少或消除自交联产品中的甲醛。
授予Iacoviello的美国专利4,449,978公开了N-羟甲基丙烯酰胺结合丙烯酰胺(例如,以1∶1的摩尔比)作为交联剂的用法。这种方法并不能提供无甲醛体系,但是与仅使用N-羟甲基丙烯酰胺作为交联剂的体系相比,其提供了具有显著较低含量的游离甲醛的体系。在该专利中可以看出,即使仅一半摩尔数的混合物包含羟甲基自交联的部分,以重量计等量的混合物也提供比得上单独N-羟甲基丙烯酰胺的特性。见表4,13-14栏。
授予Biale和Biale等人的美国专利3,714,099和3,714,100分别公开了在乙酸乙烯基酯或乙酸乙烯基酯/乙烯聚合物中使用N-羟乙基丙烯酰胺作为交联单体。授予Garrett的美国专利5,021,529也公开了使用N-羟乙基丙烯酰胺作为成分,或者使用丙烯酰胺然后添加乙醛到完成的分散体聚合物中,从而就地制造N-羟乙基丙烯酰胺。
虽然在文献中已公开了N-羟乙基丙烯酰胺用作交联剂,但其并没有在商业上使用,部分地因为其未提供比得上包含NMA的组合物的湿强度特性。参见上述授予Garrett的美国专利5,021,529的9栏-10栏中关于丙烯酸乙酯粘合剂湿强度的表1和2,可以看出NMA基自交联树脂体系显示出大得多的湿拉力。因此,通常认为N-羟乙基丙烯酰胺和更高级的羟烷基丙烯酰胺不适合用作商业用途的交联剂。
希望不受任何特定理论束缚,应注意到,与甲醛与丙烯酰胺的相应反应向其产物N-羟甲基丙烯酰胺发展相比,丙烯酰胺与乙醛的反应平衡较少向产物N-羟乙基丙烯酰胺发展。因此,在N-羟乙基丙烯酰胺组合物中固有存在相对高含量的乙醛。乙醛(不同于甲醛)为导致形成低分子量聚合物或低聚物而不是工程织物和纺织物应用所需的较高分子量聚合物的链转移剂。在这些应用中,目标是达到无限分子量的网络以提供具有比得上纺织织物的湿强度和耐溶剂性的整理织物(finishedfabric)。因为乙醛在聚合混合物中充当链转移剂,将自由基从链转移到单体,所以获得的产物未能达到足够的分子量以提供所需的强度特性。添加更多的N-羟乙基丙烯酰胺将提供更高水平的交联,但是也增加了对分子量具有不利影响的乙醛的量。
提出了一种从N-羟烷基丙烯酰胺混合物中除去醛的方法包括用硼氢化钠将醛还原成乙醇。参见授予Leighton等人的美国专利5,415,926。虽然这是一个切实可行的致使包含醛的混合物可用的方法,但该方法充其量不过是昂贵的和耗时的。其也不可能是有效的,因为反应产物N-羟烷基丙烯酰胺当用于粘合剂组合物时可能仅经过逆反应(retro-reaction)而恢复平衡组合物。
发明内容
已经发现在聚合期间添加丙烯酰胺和N-羟烷基丙烯酰胺(C2和更高级的羟烷基)的混合物到粘合剂组合物中提供自交联分散体,同时改善这样制备的粘合剂聚合物上的游离醛的副作用。希望不受理论束缚,据信存在的丙烯酰胺强迫平衡向N-羟烷基丙烯酰胺产物方向发展,从而减少体系中残余烷基醛的量。例如,与仅使用N-羟乙基丙烯酰胺的那些体系相比,该体系允许制备更高分子量的聚合物。当制备羟烷基丙烯酰胺时,通过使用过量的丙烯酰胺适当地制备丙烯酰胺/羟烷基丙烯酰胺混合物。
这些新体系提供无甲醛的乳胶聚合物,其可用来替代含有甲醛的类似物。就这一点而言,使用以重量计等量的1∶1 N-羟乙基丙烯酰胺/丙烯酰胺替代对照聚合物中的1∶1 N-甲基丙烯酰胺/丙烯酰胺。由于分子量的差异,仅概略地有作为对照聚合物中N-羟甲基丙烯酰胺的等效质量存在的N-羟乙基丙烯酰胺的摩尔的87%,但特性仍比得上。如果需要,分子量可通过添加诸如邻苯二甲酸二烯丙酯或氰尿酸三烯丙酯的原位交联剂而递增式增加。为了进一步影响体系中丙烯酰胺和羟烷基丙烯酰胺之间的平衡,也可利用上述的硼氢化钠的方法将过量的乙醛进一步还原成乙醇,或增加丙烯酰胺的量从而使丙烯酰胺的比率更大。作为选择,与单独使用羟烷基丙烯酰胺相比,人们可使用相对较少的丙烯酰胺,并且仍正向影响交联体系。
通过以下讨论,进一步的细节和优点将变得显而易见。
具体实施方式
仅为了示例性目的,在下面详细描述本发明。在附加的权利要求中阐述的本发明的构思和范围内的修改对于本领域的技术人员将是显而易见的。在本文中使用的术语具有其一般意义,除非明确地提供更具体的定义。
在说明书和权利要求书中所用的术语“(甲基)丙烯酰胺”指丙烯酰胺或甲基丙烯酰胺;术语“羟烷基(甲基)丙烯酰胺”指羟烷基丙烯酰胺或羟烷基甲基丙烯酰胺。。
C2、C3、C4等分别指包含两个碳、三个碳和四个碳的部分等。因此,N-C2至C10羟烷基丙烯酰胺指N-羟乙基丙烯酰胺、N-羟丙基丙烯酰胺等直至C10 N-羟烷基丙烯酰胺。
“时间延迟”和类似的术语指组分或组分的混合物被添加到反应介质中的总时间。
在本文描述的水分散体可使用本领域已知的材料和技术而制备。单体组合物、乳化剂、试验步骤等出现在授予Walker等人的美国专利7,056,847,其公开内容以引用方式并入本文,以及上述授予Garrett的美国专利5,021,529,其公开内容也以引用方式并入本文。
本发明的组合物通常用作粘合剂树脂组合物,并且在由纤维网(web of fibers)制成的非织造产品的制造中特别有用。网可由本领域已知的任何方法如梳理(carded)法、气流(air-laid)法、干(dry-laid)法、湿(wet-laid)法或气流形成(air-formed)法形成。纤维可为天然的、合成的或其混合。粘合剂通过本领域已知的任何方法例如印刷、发泡、饱和、涂覆和喷涂施加到纤维上;然后在非织造辊压物的制造中目前实践的蒸汽发生器或烘箱上进行干燥。用于本发明中有用的非织物的粘合剂添加量(add-on level)可为0.1-100%、优选为3-30%。利用本发明的粘合剂制备的非织物在润湿完整性或回弹性重要的应用例如擦拭物、尿布、女性卫生、医疗和过滤产品中是有用的。非织造擦拭物可以干燥的形式使用并且仅在使用前润湿,或者可用本领域已知的水性或有机溶剂进行预湿。擦拭物在包括家居清洁、个人清洁、婴儿擦拭物和工业用擦拭物的应用中是有用的。本发明的非织物包括一次性的非织造产品,以及耐用的非织物例如研磨垫、医用纺织品和衣服衬里。
本发明的乳液粘合剂也可用作双绉纸(double re-creped paper)的粘合剂。双绉纸在诸如毛巾料的产品中使用。粘合剂以约4-20%的添加量进行印刷施加。
乳液粘合剂可通过本领域已知的方法用于粘合其它纤维,例如玻璃纤维和碳纤维。
实施例1
以下步骤用于制备本发明的乙酸乙烯基酯水分散体。
将480.0g的去离子水、3.0g的气溶胶A-102、15.00g的25%乙烯基磺酸钠(SVS)水溶液、0.12g的乙酸钠、3.60g的Igepal CA-887、0.6g的甲醛次硫酸钠(SFS)、2.40g的1%维尔烯(Versene)100水溶液和2.40g的1%硫酸亚铁水溶液添加到1升的玻璃反应器中。提供足够的磷酸以调整pH值到3.8和4.2之间。在搅拌的同时,用氮流净化容器。10分钟后,反应器被加热到65℃以用于引发;然而,当反应器中的温度达到50℃时,将60.0g的乙酸乙烯基酯添加到反应器中,接着添加指定的其它组分。当反应器中的温度为58℃时(和其后),将2.64g叔丁基过氧化氢在60.0g去离子水中的水溶液慢慢地添加到反应器中,使得总延迟时间为4.25小时。在同一时间(和其后),将1.72g SFS在54.0g去离子水中的水溶液慢慢添加到反应器中,使得其总延迟时间与叔丁基过氧化氢水溶液的总延迟时间相等。当反应器中的温度达到65℃时,观察到了引发。在观察到的引发后五分钟,将72.0g去离子水、24.0g的气溶胶A-102、8.40g的Igepal CA-887、0.60g的乙酸钠、510g的乙酸乙烯基酯、30.0g的丙烯酸丁酯和75.0g以1∶1摩尔比的丙烯酰胺和N-羟乙基丙烯酰胺(NEA)(低乙醛)的48%的水溶液加入并且持续添加,从而使其总延迟时间为四小时。反应器中的温度通过调整氧化还原对(redox couple)的进料速率进行维持。当单体完全添加到反应器中时,继续添加氧化还原对达五分钟。在这一点上,加入0.15g的叔丁基过氧化氢添加并且将反应物搅拌五分钟。接着加入0.72g SFS在6.0g去离子水中的水溶液并且将反应物再搅拌十五分钟。然后让反应物进行冷却。当反应器冷却到30℃时,将分散体转移到干净的夸脱瓶中。所得到的分散体为pH值为5.0、布鲁克菲尔德粘度为44cps、0.017%砂砾(grit)和343nm粒度的46.29%固体。
实施例2
以下步骤用于制备本发明的乙烯/乙酸乙烯基酯水分散体。
将1610.0g的去离子水、14.0g的1%硫酸亚铁水溶液、84.0g的SVS、87.5g的Hostapur SAS30、58.45g的Polystep TD189、14.0g的1%维尔烯100水溶液、1.75g的硫酸钠和1.575g的异抗坏血酸钠添加到10升的钢制反应器中。添加足够的磷酸以将pH值调节到3.8,然后添加2870.0g的乙酸乙烯基酯并且用乙烯将反应器增压到750psi。在以500rpm搅拌的同时,使容器达到平衡。一旦反应器处于平衡(和其后),搅拌会降低到400rpm,缓慢加入17.5g叔丁基过氧化氢在210.0g去离子水中的水溶液以及14.0g异抗坏血酸钠在210.0g去离子水中的水溶液。这两个缓慢添加的总延迟时间为约三小时。在引发后(反应器温度上升两度),反应器夹套被升高到45℃,并且在超过四个半小时内缓慢地加入437.5g去离子水、115.5g的Hostapur SAS30、43.75g的PolystepTD 189、0.525g的乙酸钠和483.0g以1∶1摩尔比的丙烯酰胺和N-羟乙基丙烯酰胺(低乙醛)的48%水溶液的水溶液。氧化还原对的缓慢添加也慢下来,使得其在该水溶液的延迟后30分钟完成。反应器中的温度维持在60-63℃,同时夹套温度维持在50-52℃之间。当氧化还原对的缓慢添加完成时,使反应器冷却到55℃。一旦冷却后,将产物转移到卸料机(stripper)。将3.5g叔丁基过氧化氢在31.5g去离子水中的水溶液迅速添加到反应器中。五分钟后,在超过15分钟内加入2.625g异抗坏血酸钠在31.5g去离子水中的水溶液。在搅拌过夜后,将分散体转移到两个干净的加仑瓶中。所得到的分散体为pH值为4.7、布鲁克菲尔德粘度为148cps、0.0006%砂砾和369nm粒度的50.48%固体。
实施例3、4和对比例A、B
依照实施例1和2的步骤,共聚物使用替代N-羟乙基丙烯酰胺/丙烯酰胺混合物的NMA和丙烯腈1∶1混合物的48%分散体进行合成。因此,组合物A与实施例1的组合物基本上相同,并且组合物B与实施例2的组合物基本上相同,不同的是,采用的自交联剂。
通过饱和方法将20重量%添加量的共聚物施加到Whatman # 4CHR层析纸上,对实施例1、2的组合物和组合物A、B的干和湿拉力进行测试。百分比添加量计算如下:
Figure A20081012949200121
不饱和纤维的重量为施加任何粘合剂组合物前的纤维的重量。饱和纤维的重量为施加粘合剂后的网的重量,并且该网被干燥以除去基本上所有水分。非织造纤维网通常将具有2-50重量%,大多数情况下优选为15-30重量%的添加量值。
在用粘合剂处理后,接着将该纸在210到215℉下进行90秒的圆筒干燥,并且在300到325℉下进行2分钟的固化。将1英寸×5英寸的饱和Whatman纸带在横向方向(CMD)切出5英寸的长度。拉伸强度在标准的Instron拉伸试验机上进行测量,其设定在3英寸的标距和1英寸每分钟的测试速度(crosshead speed)。将样品在气溶胶OT润湿剂的1.0%溶液中浸泡一分钟后,对其湿拉伸强度进行测量。对5-7个拉力带的湿拉伸强度进行测量并且取得平均值。由粘合剂提供的特征湿强度值以克每英寸记。结果在下表1中示出:
表1-实施例1、2组合物和对比例A、B组合物的拉伸对比
  样品   CMD干拉伸   CMD湿拉伸
  组合物A   6809g/英寸   4064g/英寸
  实施例1的组合物   7188g/英寸   3669g/英寸
  组合物B   7450g/英寸   4251g/英寸
  实施例2的组合物   7274g/英寸   3755g/英寸
从上述数据可以看出,实施例1和实施例2组合物显示出比得上NMA基组合物的干和湿拉伸。这些结果令人惊讶,因为其与常规的经验相反,在常规的经验中与具有C2和更高级羟烷基的N-羟烷基丙烯酰胺组合物相比,包含NMA的组合物通常显示出更大的拉伸,特别是湿拉伸。
因此根据本发明提供一种水分散体,其包含自交联的含有羟烷基(甲基)丙烯酰胺的共聚物,所述共聚物是在乳液聚合介质中通过在介质中共聚以下物质而制备的:(甲基)丙烯酰胺单体;N-C2至C10羟烷基(甲基)丙烯酰胺单体,其中共聚的(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为至少0.5;以及至少一种或多种其它的烯键不饱和单体,其以基于介质中共聚的单体干重约80重量%到约98重量%的量添加到介质中。一般来讲,(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为0.5-3,例如,其中(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为0.75-2。(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比可为0.9-1.5或1-1.25。
在介质中共聚的(甲基)丙烯酰胺和N-C2至C10羟烷基(甲基)丙烯酰胺的量通常基于介质中共聚的单体干重为2重量%-20重量%,并且基于介质中共聚的单体干重可为3重量%-10重量%。在一个优选的实施方案中,介质中共聚的(甲基)丙烯酰胺和N-C2至C10羟烷基(甲基)丙烯酰胺的量为基于介质中共聚的单体干重的4重量%-8重量%。
(甲基)丙烯酰胺单体合适地为丙烯酰胺,并且N-C2至C10羟烷基(甲基)丙烯酰胺在典型的情况下合适地选自N-羟乙基丙烯酰胺、N-羟丙基丙烯酰胺、N-羟丁基丙烯酰胺和N-羟苯甲基丙烯酰胺。一种或多种其它的烯键不饱和单体选自:丙烯酸;丙烯腈;丙烯酸乙酯;乙烯;异戊二烯;甲基丙烯酸甲酯;甲基苯乙烯;丁二烯;丙烯;苯乙烯;包括VeoVaTM9、VeoVaTM10和VeoVaTM11乙烯基酯的有支链的烷烃羧酸(versatic acid)的乙烯基酯和乙酸乙烯基酯。
VeoVaTM乙烯基酯为得自俄亥俄州哥伦布的瀚森化工公司(HexionSpecialty Chemicals,Columbus,Ohio)的有支链的烷烃羧酸的酯。该乙烯基酯具有以下的通式结构:
其中R1和R2为可共同包含约6-8个碳原子的烷基基团。特别优选的乙烯基酯包括VeoVaTM9、VeoVaTM10和VeoVaTM11乙烯基酯。在VeoVaTM9中,R1和R2共同包含6个碳原子。在VeoVaTM10中,R1和R2共同包含7个碳原子。在VeoVaTM11中,R1和R2共同包含8个碳原子。
在本发明的另一方面,提供一种水分散体,其包含自交联的含有乙酸乙烯基酯和N-羟乙基丙烯酰胺的共聚物,所述共聚物是在乳液聚合介质中通过在介质中共聚以下物质而制备的:丙烯酰胺单体;N-羟乙基丙烯酰胺单体,其中共聚的丙烯酰胺:N-羟乙基丙烯酰胺的摩尔比为至少0.5;以及乙酸乙烯基酯,其以基于介质中共聚的单体干重约50重量%到约98重量%的量添加到介质中。这些具体的聚合物通常具有上述的属性。共聚物合适地包含约5重量%-约40重量%的乙烯重复单元,并且更典型地,约15重量%-约30重量%的乙烯重复单元。
本发明的另一方面涉及一种非织造纤维基底,其包括利用共聚物粘合剂粘合的纤维,所述共聚物是在乳液聚合介质中通过在介质中共聚以下物质而制备的:(甲基)丙烯酰胺单体;N-C2至C10羟烷基(甲基)丙烯酰胺单体,其中共聚的(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为至少0.5;以及至少一种或多种其它的烯键不饱和单体,其以基于介质中共聚的单体干重约80重量%到约98重量%的量添加到介质中。该纤维包含得自纸浆的、天然存在的纤维素造纸纤维,和/或该纤维包含聚酯纤维、聚乙烯纤维、聚丙烯纤维、尼龙纤维或其混合物。
共聚物向纤维基底中的添加量(其干重)为2重量%-约50重量%,并且更典型地,共聚物向基底中的添加量为15重量%-约30重量%。
虽然对本发明进行了详细的描述,但在本发明的构思和范围内的修改对于本领域的技术人员将是显而易见的。根据前述讨论,结合背景技术和具体实施方式上面所讨论的本领域的相关知识和其公开内容全部通过引用并入本文的参考文献,进一步的描述被认为是没有必要的。

Claims (25)

1.一种水分散体,其包含自交联的含有羟烷基(甲基)丙烯酰胺的共聚物,所述共聚物是在乳液聚合介质中通过在介质中共聚以下物质而制备的:
(a)(甲基)丙烯酰胺单体;
(b)N-C2至C10羟烷基(甲基)丙烯酰胺单体,其中共聚的(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为至少0.5;以及
(c)至少一种或多种其它的烯键不饱和单体,其以基于所述介质中共聚的单体干重约80重量%到约98重量%的量添加到所述介质中。
2.根据权利要求1所述的水分散体,其中(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为0.5-3。
3.根据权利要求1所述的水分散体,其中(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为0.75-2。
4.根据权利要求1所述的水分散体,其中(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为0.9-1.5。
5.根据权利要求1所述的水分散体,其中(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为1-1.25。
6.根据权利要求1所述的水分散体,其中所述介质中共聚的(甲基)丙烯酰胺和N-C2至C10羟烷基(甲基)丙烯酰胺的量基于所述介质中共聚的单体干重为2重量%-20重量%。
7.根据权利要求1所述的水分散体,其中所述介质中共聚的(甲基)丙烯酰胺和N-C2至C10羟烷基(甲基)丙烯酰胺的量基于所述介质中共聚的单体干重为3重量%-10重量%。
8.根据权利要求1所述的水分散体,其中所述介质中共聚的(甲基)丙烯酰胺和N-C2至C10羟烷基(甲基)丙烯酰胺的量基于所述介质中共聚的单体干重为4重量%-8重量%。
9.根据权利要求1所述的水分散体,其中所述(甲基)丙烯酰胺单体为丙烯酰胺,以及N-C2至C10羟烷基(甲基)丙烯酰胺选自N-羟乙基丙烯酰胺、N-羟丙基丙烯酰胺、N-羟丁基丙烯酰胺和N-羟苯甲基丙烯酰胺。
10.根据权利要求1所述的水分散体,其中一种或多种其它的烯键不饱和单体选自:丙烯酸;丙烯腈;丙烯酸乙酯;乙烯;异戊二烯;甲基丙烯酸甲酯;甲基苯乙烯;丁二烯;丙烯;苯乙烯;包括VeoVaTM9、VeoVaTM10和VeoVaTM11乙烯基酯的有支链的烷烃羧酸的乙烯基酯和乙酸乙烯基酯。
11.一种水分散体,其包含自交联的含有乙酸乙烯基酯和N-羟乙基丙烯酰胺的共聚物,所述共聚物是在乳液聚合介质中通过在介质中共聚以下物质而制备的:
(a)丙烯酰胺单体;
(b)N-羟乙基丙烯酰胺单体,其中共聚的丙烯酰胺:N-羟乙基丙烯酰胺的摩尔比为至少0.5;以及
(c)乙酸乙烯基酯,其以基于所述介质中共聚的单体干重约50重量%到约98重量%的量添加到所述介质中。
12.根据权利要求11所述的水分散体,其中丙烯酰胺:N-羟乙基丙烯酰胺的摩尔比为0.5-3。
13.根据权利要求11所述的水分散体,其中丙烯酰胺:N-羟乙基丙烯酰胺的摩尔比为0.75-2。
14.根据权利要求11所述的水分散体,其中丙烯酰胺:N-羟乙基丙烯酰胺的摩尔比为0.9-1.5。
15.根据权利要求11所述的水分散体,其中丙烯酰胺:N-羟乙基丙烯酰胺的摩尔比为1-1.25。
16.根据权利要求11所述的水分散体,其中所述介质中共聚的丙烯酰胺和N-羟乙基丙烯酰胺的量基于所述介质中共聚的单体干重为2重量%-20重量%。
17.根据权利要求11所述的水分散体,其中所述介质中共聚的丙烯酰胺和N-羟乙基丙烯酰胺的量基于所述介质中共聚的单体干重为3重量%-10重量%。
18.根据权利要求11所述的水分散体,其中所述介质中共聚的丙烯酰胺和N-羟乙基丙烯酰胺的量基于所述介质中共聚的单体干重为4重量%-8重量%。
19.根据权利要求11所述的水性粘合剂,其中所述共聚物包含约5重量%-约40重量%的乙烯重复单元。
20.根据权利要求11所述的水性粘合剂,其中所述共聚物包含约15重量%-约30重量%的乙烯重复单元。
21.一种非织造纤维基底,其包括利用共聚物粘合剂粘合的纤维,所述共聚物是在乳液聚合介质中通过在介质中共聚以下物质而制备的:
(a)(甲基)丙烯酰胺单体;
(b)N-C2至C10羟烷基(甲基)丙烯酰胺单体,其中共聚的(甲基)丙烯酰胺:N-C2至C10羟烷基(甲基)丙烯酰胺的摩尔比为至少0.5;以及
(c)至少一种或多种其它的烯键不饱和单体,其以基于所述介质中共聚的单体干重约80重量%到约98重量%的量添加到所述介质中。
22.根据权利要求21所述的非织造纤维基底,其中所述纤维包含得自纸浆的、天然存在的纤维素造纸纤维。
23.根据权利要求21所述的非织造基底,其中所述纤维包含聚酯纤维、聚乙烯纤维、聚丙烯纤维、尼龙纤维或其混合物。
24.根据权利要求21所述的非织造基底,其中共聚物向基底中的添加量(其干重)为2重量%-约50重量%。
25.根据权利要求21所述的非织造基底,其中共聚物向基底中的添加量(其干重)为15重量%-约30重量%。
CNA2008101294929A 2007-07-31 2008-07-31 利用具有c2-c10羟烷基的丙烯酰胺/n-羟烷基丙烯酰胺交联混合物的自交联分散体 Pending CN101358015A (zh)

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