CN101652409A - 轴承构件和用于在纤维素上沉积添加剂特别是含氟聚合物的方法 - Google Patents
轴承构件和用于在纤维素上沉积添加剂特别是含氟聚合物的方法 Download PDFInfo
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Abstract
一种向纤维素施覆添加剂(例如,含氟聚合物)的方法。该方法包括多个步骤。首先,使固体纤维素、能够溶解纤维素的溶剂(例如,NMMO)与所述添加剂的分散体彼此接触。使所述添加剂扩散至溶解的纤维素内,这可能是使所述固体纤维素的表面层溶解的结果。接着所述纤维素在所述溶剂中的溶解度降低,由此将已经扩散至溶解的纤维素内的添加剂掺混到得到的固体纤维素中。还描述了将含氟聚合物施覆到纤维素上作为表面涂层的方法。描述了由本发明的方法制得的包括垫片的挠性轴承构件,所述垫片含有纤维素纤维和含氟聚合物。
Description
背景技术
本发明涉及轴承构件(bearing component),特别是挠性轴承构件,该轴承构件具有支承面(bearing surface)并含有纤维素和含氟聚合物,本发明还涉及用于向纤维素施覆添加剂(例如:疏水性含氟聚合物)的方法。
背景技术
纤维素是易于获得的并能被用来制造一系列物品的物质。在制造物品时使用纤维素具有许多优势,包括相对低的成本和环境友好。
含氟聚合物是公知的并能用来对材料(特别是所制造的物品的表面性质)进行修饰。例如,通常将含氟聚合物(例如:聚四氟乙烯(PTFE))施覆到金属物品上,以获得低表面能涂层,赋予该物品的表面润滑和防水特性,例如,这些涂层可以用来生产“不粘的”炊具或低摩擦轴承。然而,难以将一些添加剂(包括含氟聚合物)施覆到纤维素系的(cellulose-based)物品上,这是由于纤维素通常在对它们进行加工所需的温度下发生降解。
公知的是,轴承包括由挠性片或管提供的支承面,它通常由用润滑剂(例如:蜡、PTFE或油)浸渍的材料制成。将所述片或管置于轴承的运动部件之间,并使得这些部件相对于彼此发生运动。该设计通常用于不承受大的作用力的轴承,例如:在车后挡板(car tailgate)、气缸回转阀(air-cylinders rotaryvalves)和传动装置(actuator)的接头(joint)或支架臂(support arm)。如果所述支承面损毁或发生磨损,可以更换所述片或管。
从GB-1144048中可以知道,当与水混合时,水性N-甲基吗啉N-氧化物(NMMO)以及其他的环胺氧化物(cyclic amine oxide)可以溶解纤维素,并且该性质被用于纤维素纱的纺制中(参见例如US-4246221)。水性NMMO在工业加工中的使用具有许多优势。NMMO的毒性低,并且当它被用作溶剂时,能在加工物流中进行循环。50%的NMMO的水溶液可商购自Huntsman公司(10003 Woodloch Drive,The Woodlands,TX77380,美国)。
图1是水/NMMO/纤维素在标准温度和压力下的相图。阴影区域说明了NMMO的水溶液所溶解的纤维素的浓度。在该阴影区域之外,纤维素以固体形式存在。在该阴影区域之内,纤维素在过量时(例如,>12重量%的纤维素)也可以以固体形式存在。
本发明的目的是提供含有纤维素和含氟聚合物的轴承构件,以及将例如含氟聚合物的特定添加剂施覆到固体纤维素上的方法。
发明内容
根据本发明,提供了一种具有支承面的轴承构件(特别是挠性轴承构件),该轴承构件包括垫片(mat),所述垫片含有纤维素纤维和含氟聚合物,其中,至少部分含氟聚合物位于所述支承面上,并且附着在所述纤维素上。任选地,将所述含氟聚合物涂敷或掺混在所述垫片的个体纤维的表面上。
该表面含氟聚合物的形式可以为处于所述垫片的表面上的以形成所述支承面的涂层。可选择地,可以将所述含氟聚合物掺混在该纤维素垫片中,从而使得部分的含氟聚合物存在于所述支承面上。所述含氟聚合物可以贯穿存在于整个支承面上,也可以为不连续的。这可以通过如下文所描述的将含氟聚合物施覆到纤维素上的方法来实现。
所述垫片可以包括除纤维素纤维以外的材料,例如,由其他材料制成的增强纤维、非纤维形式的纤维素(例如,粉末状的纤维素)以及填料、颜料、合作使用的树脂(co-resin)、分散剂以及用于造纸领域的其他添加剂。
这些成分可以被掺混到任何已知的合适的轴承中,以提供支承面。
所述轴承构件可以根据实际应用而为任意具体的形状或大小。在纤维素垫片上形成支承面,根据其应用,所述纤维素垫片可以为挠性的、刚性的或硬质的,例如,它可以为纸板或纤维素板。使用纤维素纤维垫片(例如,纸张)作为基底来制造轴承构件的一个优势在于,轴承构件的成本相对较低。而且,根据本发明的轴承构件可以用来暂时性地或永久性地修复磨损的支承面,并且易于切割成所需的尺寸。
根据本发明的轴承构件可以在高温(达到约220℃)下使用。
此外,根据本发明,提供了一种向含有纤维素纤维的垫片施覆含氟聚合物的方法,该方法包括以下步骤:
(a)在该纤维素纤维垫片的表面上施覆所述含氟聚合物的分散体,以及
(b)给该纤维素纤维垫片加压,例如对所述纤维素纤维垫片进行压延,从而将所述含氟聚合物涂敷并附着在该纤维素垫片的所述表面上。
所述含氟聚合物可以为PTFE、氟化乙丙烯(FEP)、全氟烷氧基树脂(PFA)、全氟甲基乙烯基醚(MFA)、聚偏二氟乙烯(PVDF)、乙烯四氟乙烯(ETFE)、乙烯三氟氯乙烯(ECTFE)、或四氟乙烯-六氟丙烯-偏二氟乙烯(THV),或者可以为这些含氟聚合物或其他含氟聚合物的混合物。
所述含氟聚合物可以为水性分散体,并且可以为颗粒的形式,该颗粒的颗粒大小通常为50nm至10μm;且所述垫片中的所述纤维素纤维的通常的厚度为5-20μm,但是也可以使用更大的或更厚的纤维。
步骤(a)可以通过在控制速率下直接将悬浮体施覆在所述纤维素纤维垫片上而实施,例如,通过喷涂、或者使用施覆辊(application roller)或刮刀(doctor blade)。
步骤(b)优选在150-250℃的温度、1000-2000磅/平方英寸(lb/sq in)(6.9-13.8MPa)的压力下进行。
步骤(a)和(b)可以在连续的生产线上不间断地进行。
本发明还延及纤维素产品,用根据本发明的上述方法将含氟聚合物施覆到该纤维素产品上。
根据本发明的另一方面,提供了进一步向纤维素施覆添加剂(例如,含氟聚合物)的方法,该方法包括以下步骤:
(a)使固体纤维素、能够溶解纤维素的溶剂与所述添加剂的分散体彼此接触,从而使该固体纤维素的表面层溶解于所述溶剂中;所述溶剂可以为水与其他液体(例如,NMMO)的混合物,
(b)使溶解的纤维素与所述添加剂接触,例如,使所述添加剂扩散至与该溶解的纤维素接触,以及
(c)调整所述溶剂的组成、用量或温度,从而降低所述纤维素在所述溶剂中的溶解度并使溶解的纤维素至少部分地从溶液中析出,由此将已经与该溶解的纤维素接触的添加剂掺混到得到的固体纤维素中或附着到得到的固体纤维素上。
在本发明的该方面的一种实施方式中,所述添加剂为疏水性的,例如为含氟聚合物。然而,本发明可以用来添加不溶于所述溶剂的任意的添加剂,并且特别适用于向纤维素添加水不溶性添加剂。例如,所述添加剂可以为含氟聚合物,该含氟聚合物包括但不限于:PTFE、或者以上提及的其他含氟聚合物、或者这些含氟聚合物或其他含氟聚合物的混合物。该接触的时间(即,方法步骤(a)和(b)的持续时间)可以为10分钟的量级,但是可以根据具体条件而为更短或更长。
可以在进行步骤(a)之前将所述添加剂与所述溶剂结合,或者可以在所述溶剂与所述纤维素接触时加入所述添加剂。优选地,所述添加剂以微粉或分散体级别的颗粒的形式分散在介质(例如水)中。该添加剂颗粒可以为圆形的、棒状的或盘状的,或者所述添加剂可以为纤维状的。
所述溶剂可以为两种液体的混合物,例如:水与其他的液体;所述混合物可以使得纤维素在该混合物中的溶解度依赖于该混合物中的所述两种液体的相对的量,例如,所述溶剂仅在该溶剂混合物的有限的组成范围内才能使纤维素溶解。这样就可以通过调整所述两种液体相对的量来使所述纤维素从步骤(c)的溶液中析出。这种调整可以通过例如加热混合物来实现,从而使沸点较低的液体比另一种液体更快地蒸发出来,由此提高了后者在溶剂中的浓度。
所述溶剂可以为水与环胺氧化物的混合物,例如在GB-1144048和US-4246221中公开的溶剂。在它们中,由于NMMO可商购得到,因而优选NMMO。
需要特别说明的是本发明在该方面的一种实施方式,即其中所述溶剂为多组分体系(即,含有至少两种组分),且仅当所述组分的相对量处于有限的范围内时,纤维素才可溶解的实施方式;这将参考水/NMMO溶剂体系进行描述,该描述仅作为实施例给出,并且应该再次记住的是,也可以使用其他的溶剂作为替代。在本方法的步骤(a)中,将水/NMMO的混合物与纤维素接触,并且调整水/NMMO的量(如果必要)从而使该混合物处于图1的相图的阴影区域中,其中所述纤维素的表面层溶解于该溶剂混合物中。确认的是,图1的阴影区域对应于存在NMMO一水合物的区域。接着,可以使所述添加剂扩散至与该纤维素溶液接触,可以在该水/NMMO混合物与所述纤维素接触之前或之后,将所述添加剂加入到该水/NMMO混合物中。在步骤(c)中,调整水和NMMO的量,以使该水/NMMO混合物处于图1的相图的所述阴影区域之外,这使得先前溶解的纤维素从溶液中析出,并将所述添加剂固定到所述纤维素上。对所述溶剂中的水和NMMO的量的调节可以通过以下方法实现:
(i)加热该水/NMMO混合物,例如,加热至温度为80-100℃。由于水比NMMO更易于挥发,水将优先被蒸发而该混合物中的NMMO的浓度将提高,直到该水/NMMO混合物落在图1的所述阴影区域之外。
(ii)除去水和NMMO,从而使溶剂的量不足以溶解所述纤维素,或者
(iii)加入NMMO或水。可能性(iii)的不利之处在于,提高了所使用的成分的量,导致难以混合并控制该过程,并且妨碍了将所述纤维素从该水/NMMO中分离的步骤。
当不能通过调节多组分溶剂体系中的组分的相对的量来使所述纤维素从溶液中析出(例如,如果使用单一组分溶剂)时,选项(ii)通常是可利用的,以使至少一部分溶解的纤维素从溶液中析出。
当所述溶剂为NMMO时,假设除纤维素以外不存在其他的物质,为了使纤维素溶解,步骤(a)中的水和NMMO的量通常为约16-21%的水和79-84%的NMMO。但是如果存在其他物质,这些比例可以不同。
能够在任何形式的固体纤维素上使用本发明的方法,例如,在已经形成为例如纸张的产品的纤维素上,或者在疏松的纤维素纤维上。通过这种方式,可以对纤维素纤维的表面进行修饰,随后可以将该纤维素纤维掺混到新的纸张产品中。
本发明的方法可以在纸张或其他准备形成的(ready-formed)纤维素产品上进行。在已经形成为纸张的纤维素上进行本方法的优势在于,能够在该纸张的选定的离散区域、表面和面积内提供添加剂,由此,用本发明的方法对该纸张的一部分进行处理,而不对其余部分进行处理。例如,如果仅无吸收性的(non-absorbent)纸张的表面需要添加剂,而不是该纸张的全部厚度上都需要添加剂,仅对该纸张的表面选择性地施覆溶剂和添加剂意味着仅表面上的纤维素掺混有添加剂,这防止了所使用的添加剂材料的浪费。同时,这使得该纸张的整体性质(例如,强度和密度)得以保持。作为进一步的实例,使用本发明的方法能够仅给纸张的一侧提供添加剂,从而使该纸张的两侧具有不同的性质。
将所述添加剂掺混到所述纤维素中之后,通过用水进行洗涤可以将任何残留的溶剂从固化的纤维素中除去;由于NMMO具有吸湿性并且易于被水稀释,因此这在使用NMMO时是易于实现的。通常来说,使用过量的冷水来除去与纤维素混合在一起的残留的溶剂。该洗涤过程优选为使该纤维素的所述表面上的溶剂的浓度不会产生可以溶解大量纤维素的溶剂混合物,或仅快速地进行上述过程。
可以回收并循环含有溶剂(例如:NMMO)的加工物流,以重复用于本发明的方法中。
完成洗涤之后,可以将所述纤维素干燥以除去水和残留溶剂,产生具有所述添加剂(例如,含氟聚合物)的纤维素或含有纤维素的物品(例如,纸张),所述添加剂被掺混到该固体纤维素的表面内。如果该产品为纸张,则可以进行进一步地加工,例如,通过压延来平滑并压紧纸张,或其他标准的纸张处理过程。
本发明还延及含有固体纤维素的产品,用根据本发明的方法将添加剂施覆到该产品上。
在根据本发明的该方法的一种实施方式中,在含氟聚合物颗粒的水性分散体的存在下,使NMMO的水溶液与纸张形式的固体纤维素接触。通过蒸发水来提高该溶液中的NMMO的浓度,从而达到使纤维素溶解的浓度(即,图1中的阴影区域)。与混合物接触的该固体纤维素的表面层随后溶解,并且所述含氟聚合物扩散至整个液相。随后进一步除去水,使得至少部分溶解的纤维素从溶液中析出;接着洗脱NMMO并对纸张进行干燥。
在本发明的各个方面中,其中添加剂(例如,含氟聚合物)存在于纤维素基底的表面上,无论添加剂层是否已经被压延,该添加剂层的厚度通常可以为0.1-100μm的量级,例如为1-50μm。
附图说明
可以以各种方式实施本发明,并且将参考附图通过实施例对一些实施方式进行描述,其中:
图1为在标准温度和压力下的水/NMMO/纤维素的相图;
图2和图3(分别地)为进行压延之前和进行压延之后的纸张的扫描电子显微镜照片;
图4和5为(分别地)为在进行压延之前和进行压延之后的涂敷在纸张上的PTFE的扫描电子显微镜照片;以及
图6为利用从NMMO中的沉积而得到的涂覆在纸张上的PTFE的扫描电子显微镜照片;在进行压延之后得到该显微镜照片。
具体实施方式
实施例1
按以下配比使水和NMMO的初始混合物与含氟聚合物颗粒的水性分散体结合,其中,所有的百分数均表示为重量百分数:
·35%的PTFE颗粒的分散体(Dyneon 5035PTFE分散体,颗粒尺寸为200nm)
·55%的商购得到的NMMO水溶液,该水溶液含有55%的NMMO
·10%的去离子水。
制得一批次223g的该混合物组合物。
将该混合物置于旋转蒸发器中,以将水从该混合物中除去。降低烧瓶中的压力并使用水浴将混该合物加热至88℃。旋转速度为100转/分钟。缓慢地除去水以避免产生泡沫。将123g的水除去。所得的混合物中的NMMO的浓度位于图1的阴影区域内,并能够使固体纤维素溶解,且该混合物的粘度适于方便地施覆到纸张上。
用涂布棒(applicator bar)将浓缩的混合物施覆到致密的牛皮纸(brownpaper)的表面上。该浓缩的混合物可以处于室温下或处于高温下。然后将该涂敷的纸张在烘箱中100℃下干燥10分钟,以进一步除去水,这使得溶解的纤维素至少部分地固化(即,从溶液中析出)。随后在流动水龙头(running tap)下洗涤约5分钟,除去残留的NMMO。用光干燥器(photodryer)对纸张进行再干燥,以避免纸张收缩或产生褶皱,光干燥器设定为100-120℃,并持续10分钟。随后对干燥的纸张进行压延。
制得含有PTFE颗粒的涂敷的纸张,所述PTFE颗粒集中在纸张表面附近。
实施例2
将50%的NMMO水溶液置于旋转蒸发器中,并除去18.9%的水,余下的溶液含有55%的NMMO。
随后将得到的溶液与含氟聚合物颗粒的分散体按以下的比例进行组合:
·77%的NMMO溶液(含有55%的NMMO)
·23%的PTFE颗粒分散体,具有与实施例1中所用的分散体相同的组成。
该NMMO溶液的浓度在掺混含氟聚合物分散体之前,与实施例1中描述的存在有含氟聚合物的NMMO溶液的浓度相比,减少了在旋转蒸发器中进行蒸发的过程中所产生的气泡。
按照与实施例1中相同的方式将这些组分的混合物施覆到纸张的表面上,但是该混合物中的NMMO的浓度过低,以致不能溶解所述纤维素,这是因为它处于图1的相图内的点X。在烘箱中100℃下进行的第一干燥步骤中,水被除去并且NMMO的浓度升高到最终足以溶解该纸张中的纤维素,例如,接近图1中点Y的浓度。这与实施例1的方法相反,实施例1中,在施敷至纸张之前,将NMMO的浓度调整为能够溶解纤维素的浓度。
继续进行干燥,直到除去的水的量低于图1中的阴影区域,例如,达到点Z,在此处溶解的纤维素从溶液中析出。随后按照实施例1中所描述的对纸张进行洗涤、再干燥和压延。
如实施例1,制得含有PTFE颗粒的涂敷的纸张,所述PTFE颗粒集中在该纸张的表面附近。进行压延之后的PTFE涂敷的纸张的扫描电子显微镜照片(SEM)示于图6中。
实施例3
将致密的牛皮纸张沿长度送入压延设备,该压延设备具有成对的扁平的压延辊。在即将通过所述压延辊之前,在室温下使用涂布棒将PTFE的水性分散体施覆到纸张的表面上,以提供厚度接近6μm的PTFE悬浮体层。所述水性分散体具有以下组成:
·35%的分散体,该分散体含有60%的PTFE颗粒(Dyneon 5035 PTFE分散体,颗粒尺寸为200nm)
·65%的去离子水。
当纸张被涂敷后,使该纸张通过所述压延辊,在此处纸张在150-250℃的温度下承受1000-2000磅/平方英寸(6.9-13.8MPa)的压力。在该压延步骤中,使沉积的PTFE在纸张的表面上流动,并通过这种方式将该沉积的PTFE涂敷并附着到纸张的表面上。
图2和3(分别地)为压延之前和压延之后的纸张的扫描电子显微镜照片;图4和5为(分别地)为压延之前和压延之后的涂敷有PTFE的纸张的扫描电子显微镜照片。可以看出,压延之后的PTFE为扁平的并且是均匀的。
可以使用工业切割机将该纸张切割成盘状,或切割并卷成柱状以提供挠性轴承构件;该PTFE表面提供了优异的支承面。在支承面失效的紧急情况中,可以将该片切割成型(例如,甚至使用成对的剪刀),并插入轴承中以提供临时性的支承面,该支承面可以使用一段时间直到获得替换备件。
实施例4
通过将实施例2的NMMO方法制得的并示于图6的压延的PTFE涂敷的纸张切割成盘状的片并附着到相应形状的铝合金盘上,使得PTFE面向外而进行测试;将带有PTFE纸张的盘与另一个铝合金盘相对而进行加压并在控制速率下进行旋转。在一系列的测试中,被涂敷的纸张与该盘相对进行加压的压力为1MPa,旋转速度在20-200转每分钟内变化。在这些测试中该纸张的PTFE表面没有发生磨损,并且仅表现为稍微被抛光。
在200转每分钟下测量该PTFE纸张的速度压力(pressure velocity)(PV)水平为0.29兆帕·米/秒,这极大地超过了许多塑料轴承的PV极限。典型的塑料轴承材料的PV水平如下:
尼龙:0.13;
聚碳酸酯:0.11;
未填充的PTFE:0.04;
未填充的缩醛:0.11;
酚醛树脂:0.18。
Claims (28)
1、一种具有支承面的轴承构件,其中,该轴承构件包括垫片,该垫片含有纤维素纤维和含氟聚合物,并且其中,至少部分所述含氟聚合物位于所述支承面上,并且附着在所述纤维素纤维上。
2、根据权利要求1所述的轴承构件,其中,至少部分所述含氟聚合物以涂层形式位于所述轴承构件的表面上的所述纤维素纤维上。
3、根据权利要求1所述的轴承构件,其中,至少部分所述含氟聚合物被掺混到所述轴承构件的表面上的所述纤维素纤维内。
4、根据前述权利要求中任意一项所述的轴承构件,其中,所述含氟聚合物选自聚四氟乙烯、氟化乙丙烯、全氟烷氧基树脂、全氟甲基乙烯基醚、聚偏二氟乙烯、乙烯四氟乙烯、乙烯三氟氯乙烯、四氟乙烯-六氟丙烯-偏二氟乙烯、或它们的混合物。
5、根据前述权利要求中任意一项所述的轴承构件,其中,所述支承面为平面的或管状的。
6、前述权利要求中任意一项所述的轴承构件的应用,该应用为在轴承内提供支承面。
7、一种向含有纤维素纤维的垫片施覆含氟聚合物的方法,该方法包括以下步骤:
(a)在该纤维素纤维垫片的表面上施覆所述含氟聚合物的分散体,以及
(b)给该纤维素纤维垫片加压,例如对该纤维素纤维垫片进行压延,从而使所述含氟聚合物涂敷并附着在该纤维素纤维垫片的所述表面上。
8、根据权利要求7所述的方法,其中,所述步骤(b)是在150-250℃的温度下进行的。
9、根据权利要求7或8所述的方法,其中,所述步骤(b)是在1000-2000磅/平方英寸(6.9-13.8MPa)的压力下进行。
10、根据权利要求7-9中任意一项所述的方法,其中,所述含氟聚合物为水性分散体。
11、根据权利要求7-10中任意一项所述的方法,其中,所述含氟聚合物选自聚四氟乙烯、氟化乙丙烯、全氟烷氧基树脂、全氟甲基乙烯基醚、聚偏二氟乙烯、乙烯四氟乙烯、乙烯三氟氯乙烯、四氟乙烯-六氟丙烯-偏二氟乙烯、或它们的混合物。
12、一种含有纤维素的产品,该产品上施覆有含氟聚合物,该含氟聚合物是通过权利要求7-11中任意一项所述的方法施覆的。
13、一种向纤维素施覆添加剂的方法,所述添加剂例如为含氟聚合物,该方法包括以下步骤:
(a)使固体纤维素、能够溶解纤维素的溶剂与所述添加剂的分散体彼此接触,从而使所述固体纤维素的表面层溶解于所述溶剂中;
(b)使溶解的纤维素与所述添加剂接触;以及
(c)调整所述溶剂的组成、用量或温度,从而降低纤维素在所述溶剂中的溶解度并使溶解的纤维素至少部分地从溶液中析出,由此将所述添加剂掺混到所述纤维素中或将所述添加剂附着到所述纤维素上。
14、根据权利要求13所述的方法,该方法还包括在所述步骤(a)之前将所述添加剂与所述溶剂结合的步骤。
15、根据权利要求13所述的方法,其中,
所述溶剂为至少两种组分的混合物,例如水与另一种液体;
选择所述混合物,使得纤维素在该混合物中的溶解度依赖于该混合物中的所述组分的相对的量,以及
所述步骤(c)包括调整所述组分的相对的量,从而与纤维素在所述步骤(a)中的溶解度相比,纤维素在该混合物中的溶解度降低了。
16、根据权利要求15所述的方法,其中,最初与所述固体纤维素接触的所述组分的混合物能溶解所述固体纤维素的表面层。
17、根据权利要求15所述的方法,其中,溶解所述固体纤维素的表面层所需要的组分的比例通过以下过程获得:
将所述组分的混合物施覆到所述固体纤维素上,以及
将所述混合物干燥,以选择性地除去一种组分,从而获得能够溶解纤维素的组分的混合物。
18、根据权利要求15-17中任意一项所述的方法,其中,通过以下过程对所述组分的相对的量进行调整,使得至少部分所述纤维素从溶液中析出:
将所述混合物干燥,以选择性地除去一种组分,从而提高其它组分在该混合物中的浓度。
19、根据权利要求15-17中任意一项所述的方法,其中,所述溶剂含有水和环胺氧化物。
20、根据权利要求19所述的方法,其中,所述环胺氧化物为N-甲基吗啉N-氧化物。
21、根据权利要求20所述的方法,其中,所述步骤(a)中的所述混合物含有67-87%的N-甲基吗啉N-氧化物。
22、根据权利要求13-21中任意一项所述的方法,该方法还包括在所述步骤(c)之后,通过洗涤将所述溶剂从所述固体纤维素中除去的步骤。
23、根据权利要求13-22中任意一项所述的方法,其中,所述添加剂为处于介质中的添加剂颗粒的分散体的形式。
24、根据权利要求13-23中任意一项所述的方法,其中,所述添加剂为疏水性的添加剂。
25、根据权利要求20所述的方法,其中,所述疏水性的添加剂为含氟聚合物,例如聚四氟乙烯、氟化乙丙烯、全氟烷氧基树脂、全氟甲基乙烯基醚、聚偏二氟乙烯、乙烯四氟乙烯、乙烯三氟氯乙烯、四氟乙烯-六氟丙烯-偏二氟乙烯、或它们的混合物。
26、根据权利要求13-25中任意一项所述的方法,其中,所述固体纤维素为纸张的形式。
27、根据权利要求13-25中任意一项所述的方法,其中,所述固体纤维素为纤维素纤维或颗粒的形式,任选地处于水性悬浮液中。
28、一种含有固体纤维素的产品,该产品上施覆有添加剂,该添加剂是通过权利要求13-27中任意一项所述的方法施覆的,该添加剂例如为含氟聚合物。
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GB0702795A GB0702795D0 (en) | 2007-02-13 | 2007-02-13 | Process for modifying cellulose |
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PCT/GB2008/000499 WO2008099173A1 (en) | 2007-02-13 | 2008-02-13 | Bearing components and processes for depositing additives, especially fluoropolymers, on cellulose |
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CN112410099A (zh) * | 2019-08-23 | 2021-02-26 | 佳能株式会社 | 润滑剂组合物、滑动设备、定影设备和图像形成设备 |
US11414620B2 (en) | 2019-08-23 | 2022-08-16 | Canon Kabushiki Kaisha | Lubricant composition, sliding apparatus, fixing apparatus, and image-forming apparatus |
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CA2677719A1 (en) | 2008-08-21 |
HK1132002A1 (en) | 2010-02-12 |
RU2009132882A (ru) | 2011-03-20 |
US20140147690A1 (en) | 2014-05-29 |
JP5735148B2 (ja) | 2015-06-17 |
CN101652409B (zh) | 2012-07-04 |
AU2008216003A1 (en) | 2008-08-21 |
US20100086246A1 (en) | 2010-04-08 |
EP2118181B1 (en) | 2011-03-30 |
JP5485703B2 (ja) | 2014-05-07 |
BRPI0807254B8 (pt) | 2022-07-26 |
GB0702795D0 (en) | 2007-03-28 |
DK2118181T3 (da) | 2011-07-18 |
CA2677719C (en) | 2015-05-26 |
ATE503793T1 (de) | 2011-04-15 |
JP2014132085A (ja) | 2014-07-17 |
BRPI0807254B1 (pt) | 2019-09-24 |
SI2118181T1 (sl) | 2011-05-31 |
ES2361795T3 (es) | 2011-06-22 |
US8703668B2 (en) | 2014-04-22 |
AU2008216003B2 (en) | 2013-09-12 |
BRPI0807254A2 (pt) | 2018-12-04 |
EP2118181A1 (en) | 2009-11-18 |
JP2010518219A (ja) | 2010-05-27 |
PL2118181T3 (pl) | 2011-09-30 |
PT2118181E (pt) | 2011-05-31 |
DE602008005854D1 (de) | 2011-05-12 |
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US9205454B2 (en) | 2015-12-08 |
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