CN1329445C - 超吸收性热塑性组合物和包括它的制品 - Google Patents

超吸收性热塑性组合物和包括它的制品 Download PDF

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CN1329445C
CN1329445C CNB038022230A CN03802223A CN1329445C CN 1329445 C CN1329445 C CN 1329445C CN B038022230 A CNB038022230 A CN B038022230A CN 03802223 A CN03802223 A CN 03802223A CN 1329445 C CN1329445 C CN 1329445C
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F·D·梅哈韦吉
E·R·西蒙斯
P·佐罗姆斯基
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H B company Fullerton
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Abstract

热塑性组合物，包括有约1%重量至约25%重量的热塑性聚合物(如分子式(A-B)x或(A-B-A)的嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，x是至少为1的整数)，含有聚丙烯酸酯的球状超吸收性颗粒，和增塑油，组合物显示的水凝胶时间不多于2分钟，粘度不大于100，000厘泊和湿拉伸强度至少为15g/in2。

Description

超吸收性热塑性组合物和包括它的制品
发明背景
本发明涉及增进超吸收性热塑性组合物的吸收性能。
水不溶的水可溶胀的形成水凝胶的吸收性聚合物，也称为超吸收性聚合物，能吸收如水，体液(如尿，血)，工业液体和家庭产生的液体的大量液体，还能在适中的压力下保存这些吸收液。
超吸收性聚合物使用于各种各样的吸收制品如一次性尿布、卫生巾、纸巾、擦巾和伤口绷带。在许多的应用中，吸收制品的作用是优选尽快地吸收与保存相对大量的液体。
概要
一方面，本发明的热塑性组合物的特点是包含约1％至25％重量的有分子式(A-B)x或A-B-A的嵌段共聚物，这里的A嵌段包含聚乙烯基芳烃，B嵌段包含聚(单链烯基)，x是至少为1的整数，约45％至75％重量的超吸收性聚合物颗粒，它包含聚丙烯酸酯并有20μm至30μm的中值粒径，和约15％至40％重量的增塑油。在一个实施方案中，热塑性组合物还包含表面活性剂。在另一个实施方案中，热塑性组合物还包含约1％至约5％重量的表面活性剂。在一些实施方案中，热塑性组合物包含60％至约75％重量的超吸收性聚合物。一个实施方案的嵌段共聚物选自苯乙烯-异戊二烯-苯乙烯，苯乙烯-乙烯-丁烯-苯乙烯，苯乙烯-乙烯-丙烯-苯乙烯，苯乙烯-丁二烯-苯乙烯和它们的结合。
在一些实施方案中，该组合物显示的水凝胶时间不多于2分钟，不多于1.5分钟或不多于1分钟。在一些实施方案中，该组合物显示的0.9％食盐水溶液(saline solution)凝胶时间不多于4小时，不多于1小时，不多于25分钟，不多于10分钟或不多于5分钟。
在另一实施方案中，该组合物显示的吸收量至少为60g水/g组合物，至少70g水/g组合物，至少90g水/g组合物，至少100g水/g组合物，或至少110g水/g组合物。
在一些实施方案中，该组合物显示的吸收量至少25g 0.9％食盐水溶液/g组合物，至少30g 0.9％食盐水溶液/g组合物，或至少35g 0.9％食盐水溶液/g组合物。
在一个实施方案中，热塑性组合物包含分子式(A-B)x或A-B-A的嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，x是至少为1的整数，含有聚丙烯酸酯的20μm至30μm中值粒径的超吸收性颗粒，和增塑油。该组合物显示的水凝胶时间不多于2分钟。在一些实施方案中，嵌段共聚物选自苯乙烯-异戊二烯-苯乙烯，苯乙烯-乙烯-丁烯-苯乙烯，苯乙烯-乙烯-丙烯-苯乙烯，苯乙烯-丁二烯-苯乙烯和它们的结合。
在另一实施方案中，热塑性组合物包含分子式(A-B)x或A-B-A的嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，x是至少为1的整数，含有聚丙烯酸酯的20μm至30μm中值粒径的超吸收性颗粒和增塑油。该组合物显示的0.9％食盐水溶液凝胶时间不多于1小时。
在其它的实施方案中，热塑性组合物包含分子式(A-B)x或A-B-A的嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，x是至少为1的整数，含有聚丙烯酸酯的20μm至30μm中值粒径的超吸收性颗粒和增塑油。该组合物显示的吸收量至少为70g水/g组合物。
在一些实施方案中，热塑性组合物包含分子式(A-B)x或A-B-A的嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，x是至少为1的整数，含有聚丙烯酸酯的20μm至30μm中值粒径的超吸收性颗粒和增塑油。该组合物显示的吸收量至少为25g0.9％食盐水溶液/g组合物。
在其它的实施方案中，热塑性粘附性组合物包含分子式(A-B)x或A-B-A的约1％至25％重量的嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，x是至少为1的整数，约45％至75％重量的超吸收性聚合物颗粒，该颗粒包含聚丙烯酸酯并有20μm至30μm中值粒径，增粘剂和约15％至40％重量的增塑油。
在另一个实施方案中，热塑性组合物包含分子式(A-B)x或A-B-A的嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，x是至少为1的整数，含有聚丙烯酸酯的球状超吸收性颗粒和增塑油。该组合物显示的水凝胶时间不多于2分钟，粘度在300不大于100，000厘泊，和湿拉伸强度至少为15g/in2。在一个实施方案中，该组合物显示的0.9％食盐水溶液凝胶时间不多于1小时。在一些实施方案中，该组合物显示的0.9％食盐水溶液凝胶时间不多于10分钟。在其它的实施方案中，该组合物显示的水凝胶时间不多于1.5分钟，粘度不大于30,000厘泊和湿拉伸强度至少为40g/in2。在另一实施方案中，该组合物显示的吸收量至少70g水/g组合物。
在一些实施方案中，热塑性组合物包含约1％至25％重量的分子式(A-B)x或A-B-A嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，x是至少为1的整数，约45％至75％重量的包含聚丙烯酸酯的超吸收性聚合物颗粒，和约15％至40％重量的增塑油，该组合物显示的水凝胶时间不多于2分钟，和吸收量至少是70g水/g组合物，与至少是10g 0.9％食盐水溶液/g组合物。
另一方面，本发明的特点是吸收制品包含吸收芯和混合到吸收芯的上述组合物。
在一个实施方案中，吸收制品包含吸收芯和分布在吸收芯上的上述组合物。
另一方面本发明的特点是吸收制品包括液体可渗透片，不渗透液体的阻挡片，配置在渗透液体片与液体阻挡片之间的吸收件和分布在至少是液体渗透片、阻挡片和吸收件之一中的上述热塑性组合物。在一个实施方案中，吸收制品选自一次性尿布，卫生巾，伤口护理品，擦巾，毛巾和纸巾。
在一个实施方案中，吸收制品包括液体可渗透片，液体阻挡片和配置在液体可渗透片与液体阻挡片之间的吸收件及引入吸收件中的上述组合物。
本发明的特点是热塑性组合物显示快速吸收水与食盐水溶液，对水和盐水溶液有大的吸收量。热塑性组合物在湿时能保持良好的粘结强度与粘合完整度，呈现出的粘度适宜于在标准的热熔融设备上的加工。
从下列优选的实施方案与专利权利要求的叙述可清楚地看到本发明的其它特点。
优选实施方案的详述
热塑性组合物包括热塑性聚合物(如嵌段共聚物)，含超吸收性的聚丙烯酸酯聚合物的超吸收性颗粒和增塑剂。热塑性组合物当处于水中时优选地显示的凝胶时间不多于3分钟，优选不多于2分钟，较为优选地不多于1.5分钟，最为优选地不多于1分钟。当处于0.9％食盐水溶液时平均凝胶时间不多于4小时，优选地不多于1小时，较为优选地不多于25分钟，最为优选地不多于10分钟，甚至更为优选地不多于5分钟。
该组合物也显示至少60g水/g组合物，优选至少70g水/g组合物，较为优选至少90g水/g组合物，更为优选至少100g水/g组合物，最为优选至少110g水/g组合物的吸收量，和吸收量至少25g 0.9％食盐水溶液/g组合物，优选至少30g 0.9％食盐水溶液/g组合物，更为优选至少35g 0.9％食盐水溶液/g组合物。
热塑性组合物，湿时有粘结强度，优选湿拉伸强度至少15g/in2，较为优选至少40g/in2，最为优选至少60g/in2。
热塑性组合物优选显示的粘度在300(149℃)不大于约100,000cps，优选不大于约65,000cps，优选约1000cps至65,000cps，优选约10,000cps至85,000cps，较为优选15,000cps至65,000cps，较为优选不大于30,000cps，最为优选约15,000cps至30,000cps。
适宜的嵌段共聚物包括有分子式(A-B)x或A-B-A的线状与辐射状的共聚物结构，其中嵌段A是聚乙烯基芳烃嵌段，嵌段B是聚(单链烯基)嵌段，x是至少为1的整数。适宜的嵌段A聚乙烯基芳烃包括如聚苯乙烯，聚α-甲基苯乙烯，聚乙烯基甲苯及它们的组合物。适宜的嵌段B例如包括如聚丁二烯和聚异戊二烯的共轭的二烯弹性体，氢化的弹性体，乙烯/丁烯(氢化的丁二烯)和乙烯/丙烯(氢化的异戊二烯)，和它们的组合物与混合物。有用的市售嵌段共聚物可以商品名Kraton D和Kraton G系列购自Shell化学公司(Houston，TX)，包括如KratonG-1651，商品名Europrene SolT系列购自Eni Chem Elastomers(Houston，TX)，商品名Vector系列购自Exxon(Dexco)(Houston，TX)，商品名Soprene系列购自Enichem Elastomer和商品名Stereon系列购自Firestone Tire & Rubber Co.(Akron，Ohio)。
热塑性组合物中存在的嵌段共聚物量不大于25％重量，优选约1％至20％重量，较为优选约1％至10％重量，最为优选约1％至7％重量。
另外，热塑性组合物可以是无定形的与结晶的聚烯烃，包括均匀的与基本上为线状的乙烯/α-烯烃共聚体，乙烯的共聚体如乙烯/乙烯基乙酸酯，乙烯-丙烯酸甲酯，乙烯-丙烯酸正丁酯，及它们的混合物。
无定形的聚烯烃或无定形的聚α-烯烃是均聚物，共聚物和C2-C8α-烯烃的三元共聚物。市售的无定形聚α-烯烃包括购自Rexene(Dallas，Texas)的REXTAC(t和REXFlext)基于丙烯的均聚物，乙烯-丙烯共聚物，丁烯-丙烯共聚物，Huls(Piscatawag，New Jerse)的VESTOPLAST α-烯烃共聚物。
金属茂聚烯烃是使用单位点(single-site)或金属茂的催化剂制备的均匀的线状或基本为线状的乙烯聚合物。基本为线状的乙烯聚合物购自Dow Chemical Company并包括聚烯烃塑性体(以商品名AFFINITY出售)，均匀的线状乙烯聚合物以商品名EXACT购自Exxon ChemicalCompany。均匀的线状或基本为线状的乙烯聚合物有约0.855至0.885的相对低的密度，和相对低的如小于50g/10min的熔体指数。
术语“共聚体”在此是指共聚物，三元共聚物或更高级聚合物，它们具有至少一个与乙烯聚合的其它的共聚单体。乙烯的共聚体是有至少一个共聚单体的聚合物，共聚单体选自酸部分不超过4个碳原子的饱和羧酸的乙烯基酯，有3至5个碳原子的不饱和一元或二元羧酸，不饱和酸的盐，有1至8个碳原子的醇衍生的不饱和酸的酯，及它们的混合物。乙烯的共聚体的熔体指数范围可在约50至2000，约100至1500，约200至1200，和约400至1200g/10min。
乙烯/不饱和羧酸、盐和酯的共聚体实例包括乙烯/乙烯基乙酸酯，乙烯/丙烯酸和它的离聚物，乙烯/甲基丙烯酸和它的离聚物，乙烯/丙烯酸甲酯，乙烯/丙烯酸乙酯，乙烯/丙烯酸正丁酯，及它们的衍生物。
其它适宜的热塑性聚合物包括如聚丁烯，聚交酯如己内酯聚合物，和聚(羟丁酸酯/羟戊酸酯)，某些聚乙烯醇，生物可降解的共聚多酯如Eastman Copolyester 14766(Eastman Chemical)，线状饱和聚酯，其实例有商品名DYNAPOL和DYNACOLL(Huls)，聚(环氧乙烷)聚醚酰胺和聚酯醚嵌段共聚物，其实例有商品名PEBAX(Atochem)和RITE-FLEX(HoechstCelanese)，和聚酰胺聚合物，其实例有商品名UNIREZ(UnionCamp)，VESTAMELT(Huls)和GRILTEX(EMS-Chemie)。
超吸收性颗粒包含超吸收性聚合物，它也称为水不溶的吸收性形成水凝胶的聚合物，“形成水凝胶”的聚合物和“水解胶体”。超吸收性聚合物对水的吸收量达自身重量的多倍至1000倍。有用的超吸收性聚合物包括如交联的丙烯酸酯聚合物，乙烯醇-丙烯酸酯共聚物的交联产物，聚乙烯醇用马来酐接枝的交联产物，丙烯酸酯-甲基丙烯酸酯共聚物的交联产物，丙烯酸甲酯-乙烯基乙酸酯共聚物的交联皂化产物，淀粉丙烯酸酯接枝共聚物的交联产物，淀粉丙烯腈接枝共聚物的交联皂化产物，羧甲基纤维素聚合物的交联产物和异丁烯-马来酐共聚物的交联产物，及它们的结合物。
优选的超吸收性颗粒是球形的，有约20μm至30μm，约50μm至64μm的中值粒径，或是它们的掺合物。组合物可包含球形超吸收性颗粒，平均的粒径在20μm至400μm，200μm至400μm，小于180μm，小于100μm，250μm至390μm和250μm至350μm，及它们的掺合物。
有用的市售超吸收性颗粒包括如有商品名AQUA KEEP系列的聚丙烯酸钠超吸收性颗粒，它们包括，如商品名AQUA KEEP10SH-NF(20)的约20μm至30μm中值粒径的颗粒，商品名AQUA KEEP 10SH-NF(60)的约51μm至64μm中值粒径的颗粒，商品名AQUA KEEP 10SH-P的平均颗粒大小约200μm至300μm的颗粒，商品名AQUA KEEP SA60S的平均颗粒大小320μm至370μm的颗粒，商品名AQUA KEEP SA60SX，SA55SXII，和SA60SLII的平均颗粒大小350μm至390μm的颗粒，和有商品名AQUAKEEP SA60N TYPEII的平均颗粒大小250μm至350μm的颗粒(SumitomoSeika Chemicals Col.Ltd.(日本))。
组合物中超吸收性聚合物的存在量约45％至75％重量，优选约60％至75％重量，更优选约65％至72％重量。
有用的增塑剂包括如增塑油，如包括芳香物含量低的烃油，和矿物油(如Petro Canada Lubricants(Calgary，Canada)的Purity35矿物油)，优选的增塑油是链烷烃或环烷烃。适宜的市售增塑油的一个实例的商品名为Calso1555(Calumet Refining Co.，Chicago Illinois)。适宜的市售固态重结晶增塑剂的一个实例为Benzolflex352(Velsicol，Rosemont，Illinois)。
组合物中优选的增塑油存在量为15％至约40％重量，较为优选的为约20％至30％重量，最为优选的为约25％至30％重量。
热塑性组合物可非必需地包含表面活性剂。适宜的表面活性剂包括非离子型的，阴离子型的和硅氧烷类表面活性剂。优选的市售表面活性剂的商品名为Aerosol OT100和Aerosol OTB(磺基琥珀酸二辛酯钠)(Cytec Industries，West Paterson，New Jersey)，和Rhodacal DS10(十二烷基苯磺酸钠)(Rhone Poulenc，Cranberry，New Jersey)。
当热塑性组合物中有表面活性剂时，表面活性剂量优选不多于约5％重量，较为优选约1％至5％重量，最为优选约1％至2％重量。
热塑性组合物中也可包含其它添加剂如增粘剂，蜡，抗氧化剂，颜料和它们的组合物。
适宜的增粘剂实例包括木松香，浮油松香，浮油衍生物，松脂，松香酯树脂，天然的萜烯，合成的萜烯和石油基的增粘剂，包括例如脂族、芳香族和混合脂族-芳香族的石油基增粘剂。有用的烃树脂包括例如α-甲基苯乙烯树脂，支链与非支链的C5树脂，C9树脂和C10树脂，苯乙烯的和它的氢化变体，以及它们的结合物。市售有用的增粘剂的一个实例是Zonatac 105苯乙烯化的萜烯树脂(Arizona Chemicals Inc.，PanamaCity，Florida)。市售有用的增粘的粘合组合物的实例包括HL-1620-A，HL-2238和HL-1500热塑性粘合剂(H.B.Fuller Cempany，VadnaisHeights，Minnesota)。
增粘剂可非必需地存在于组合物中，组合物中存在增粘剂时其量优选不大于40％重量，较为优选不大于30％重量。
热塑性组合物可在模具或转筒中造粒或铸造，以供随后的包括如再熔的加工与应用。
热塑性组合物以各种各样的形态例如涂料，膜，粘结剂，纤维和织造的与非织造的织物而使用。热塑性组合物可施加于或掺入到各种基材，例如织造的与非织造的织物，多孔基材，膜，带材衬背(tape backings)，吸收制品如一次性尿布，妇女用卫生巾，医用绷带(如创伤护理品)，擦巾，纸巾，毛巾与片材和吸收制品的组件，包括如吸收芯，不渗透层(如背片)，纸巾(如包卷纸巾)，接收层与织造的及非织造的织物层(如顶片，吸收纸巾)以及它们的结合物。
该组合物也使用在许多应用中，包括如防湿层(如供光学电缆应用)，旨在增加保湿性的农业应用，含有吸收湿气与液体(如血与浆汁)的部件(如薄板，薄棉纸)的包装品(如食品与药物包装品)，和防止凝固与防水的建筑材料。该组合物也使用在电缆的包覆包括如水下电缆的包覆。
各种应用技术可将热塑性组合物施加于基材上，包括如狭缝涂覆，包括如螺旋形的与随意式喷涂的喷涂，网板印刷，起泡沫，花轧辊，挤出与熔融吹制粘附应用技术。
本发明将通过以下实例进一步叙述。除非另有说明，实例中所有的部分、比例、百分数和用量皆以重量计。
实例
试验方法
实例中所使用的试验方法包括如下。
水的吸收量
总吸收量是由拉制熔融膜或热压热塑性组合物形成有20密耳厚或近0.3g/in2涂层重量的膜来测定的。将该膜切割成1平方英寸(2.54cm)并称重，然后膜样品放入50ml杯中，倒入30ml水(必要时多一些)于膜顶面，在30分钟后过滤未吸收的水并称重，测量吸收的水总量和每克组合物吸收的水克数，以g水/g复合材料记录。
水凝胶时间法
水凝胶时间是由拉制熔融膜或热压热塑性组合物形成有20密耳厚即约0.3g/in2(6.45g/cm2)涂层重量的膜测定的。将该膜样品切割成1平方英寸(2.54cm)并称重。然后把膜样品放入25ml杯中，在膜顶面倒入10ml水。开启秒表以分钟(min)记录胶凝体出现所需的时间(即所有的水被试样吸收所需的时间量)
0.9％食盐水溶液的吸收量
0.9％食盐水溶液的总吸收量是由拉制熔融膜或热压热塑性组合物形成20密耳厚或约0.3g/in2涂层重量的膜而测定的。该膜切成1平方英寸(2.54cm)并称重。将该样品膜置于50ml杯中并将30ml(必要时多一些)0.9％食盐水溶液倒入膜的顶面。30分钟后滤去未吸收的食盐水溶液并称重。测定吸收的0.9％食盐水溶液的重量并以g0.9％食盐水溶液/g复合材料记录每克组合物吸收的0.9％食盐水溶液的克数。
0.9％食盐水溶液的凝胶时间
对于0.9％食盐水溶液的凝胶时间是由拉制熔融膜或热压热塑性组合物形成有20密耳厚或近0.3g/in2涂层重量的膜测定的。将该膜切割成1平方英寸(2.54cm)并称重。然后把膜放入25ml的杯中，在膜顶面倒入10ml 0.9％食盐水溶液。开启秒表，记录胶凝体形成所需的时间(即全部0.9％食盐水溶液被吸收所需的时间量)。
粘度
使用Brookfield Laboratories DVII+粘度计测定试样的粘度。使用的转轴是适合于测定10至100,000厘泊粘度的SC-27热熔转轴。将试样放入一次性使用的铝样品舱中，该舱插入于Brookfield Thermosel并锁定在应用位置。将试样加热至300，并加入另外的试样，直至熔融的试样位于试样舱顶部约1英寸(2.5cm)以下。放低粘度计装置使转轴沉浸于试样中。启动粘度计并产生有30％至60％转矩读数的剪切速度。在约15分钟内记录每分钟的读数直到读值稳定。最终的读数以厘泊(cps)记录。
湿拉伸强度的测定
将试样组合物拉成20密耳厚的膜，从膜切出2in×lin的长条。在每一长条的每端1/2英寸处贴掩蔽带。将长条浸渍于0.9％食盐水溶液达5分钟，然后慢慢地干燥以除去过量的液体。在1分钟内将试样放置于Instron试验机(Instron Corporation，Canton，Massachusetts)的夹子之间。以12in/min的十字头速度作拉伸强度试验，对5个试样长条得的平均值以克为单位记录。
实例1-8
实例1-8各热塑性组合物的制备方法是将各组分(超吸收性颗粒除外)按表1指示的数量混合。在搅拌下加热该组合物至约300。然后超吸收性颗粒按表1指示的量加入于熔融的热塑性组合物中并进行搅拌。
对实例1-8的组合物进行试验，以测定其水凝胶时间，0.9％食盐水溶液凝胶时间，水吸收量，0.9％食盐水溶液吸收量和粘度。对实例6-8的湿拉伸强度也作了测定。结果示于表1。
表1
    实例     1     2     3     4     5     6     7     8
    成分
    NW-10671     52     44.5     -     -     -     -     -     -
    HL-1620-A2     -     -     45     -     -     -     -     -
    HL-22383     -     -     -     45     -     -     -     -
    DP-89104     -     -     -     -     15     -     -     -
    Zonatac 1055     -     -     -     -     15     -     -     -
    Calsol 5555油6 - - - - 15 - 27 22.5
    HL-15007     -     -     -     -     -     33     -     -
    Kraton G-16518     -     -     -     -     -     -     1.5     1.5
    RhodacalDS-109 - - 2 2 2 2 1 1
    AquaKeep10SH-NF10 48 55.5 53 53 53 65 70 75
    水凝胶时间     ＞25min     14.5min     8.25min     6min     2.25min     1.0min     1.5min     1.0min
    0.9％食盐水溶液凝胶时间 ＞6hrs ＞6hrs ＞5hrs 3.5hrs ＞20min 9min 5min 10min
    水吸收量(g/g)     2.2     44     60     32     68     75     116     118
    0.9％食盐水溶液吸收量(g/g) 2.7 5.2 24.5 9.9 24.7 21 35.5 37
    粘度(cps)@300F 21,000 88,000 85,000 92,000 65,000 24,000 65,000     ＞100,000
湿拉伸强度(g) NT NT NT NT NT 49g     软橡胶特征     软橡胶特征
NT＝未作试验
1NW-1067苯乙烯-异戊二烯-苯乙烯嵌段共聚物基的粘合组合物(H.B.Fuller Company)
2HL-1620-A包含烃树脂和增塑剂的苯乙烯-异戊二烯-苯乙烯嵌段共聚物基的粘合组合物(H.B.Fuller Company)
3HL-2238包含烃树脂与增塑剂的苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物基的粘合组合物(H.B.Fuller Company)
4DP-8910聚丁烯(Shell Chemical Company，Houston，Texas)
5Zonatac 105苯乙烯化的萜烯树脂(Arizona Chemical，PanamaCity，Florida)
6Calsol 5555环烷烃油(Calumet Refining Co.，Chicago，IIIinois).
7HL-1500包含烃树脂与增塑剂的苯乙烯-异戊二烯-苯乙烯嵌段共聚物基的粘合组合物(H.B.Fuller Compang)
8Kraton G-1651苯乙烯-乙烯-丁二烯-苯乙烯嵌段共聚物(ShellChemical Company)
9Rhodacal DS-10十二烷基苯磺酸钠(Rhone Poulenc，Cranberry，NewJersey)
10AquaKeep 10SH-NF有20μm至30μm中值粒径的超吸收性颗粒(Sumitomo Seika，Osaka，Japan)
实例9-14
实例9-14各热塑性组合物的制备方法是将各组分(超吸收性颗粒除外)按表2指示的数量混合，在搅拌下加热该组合物至约300。然后超吸收性颗粒按表2指示的量加入于熔融的热塑性组合物中并进行搅拌。
对实例9-14的热塑性组合物进行试验，以测定水的吸收量与粘度。结果示于表2。
表2
    实例     9     10     11     12     13     14
    成分
    HL-15007     -     -     -     -     152     172
    Rhodacal DS-109     -     2     2     2     8     8
    AquaKeep 10SH-NF10     65     60     45     -     180     165
    AquaKeep 10SH-NF6011     -     -     15     65     60     55
    Irganox 101012     0.25     0.5     0.5     0.25     -     -
    Wingtack 8613     9.5     10     10     9.5     -     -
    Sylvares  ZT510014 6.5 7.5 7.5 6.5 - -
    Benzoflex 35215     5.0     5.5     5.5     5.0     -     -
    Calsol 5555油6     6.5     7.5     7.5     6.5     -     -
    Vector 421116     5.25     7.0     7.0     5.25     -     -
    Aerosol  OT-B17     2.0     -     -     2.0     -     -
    水吸收量(g/g)     35.3     29.7     41.2     42.3     40.8     35.6
    粘度(cps)@300F     25,000     5000     5000     1100     NT     NT
11AquaKeep 10SH-NF(60)有51μm至64μm中值粒径的超吸收性颗粒(Sumitomo Seika，Osaka，Japan)
12Irganox 1010抗氧化剂(Ciba Specialty Chemicals，Tarrytown，NEW YORK)
13Wingtack 86C5增粘树脂(Goodyear Chemial(Akron，Ohio))
14Sylvares ZT 5100苯乙烯化的萜烯树脂(ArizonaChemical，Jacksonville，Florida)
15Benzoflex 352增塑剂(Velsicol ChemicalCorporation，Rosemont，IIIinois)
16Vector 4211苯乙烯-丁二烯-苯乙烯嵌段共聚物(DexcoPolymers，Plaquemine，Louisiana)
17Aerosol OTB表面活性剂(Cytec Industries，Inc.，Elmhurst，IIIinois)

Claims (13)

1.热塑性组合物，包括：
1％重量至25％重量的热塑性聚合物，该热塑性聚合物选自有分子式(A-B)x或A-B-A的嵌段共聚物，其中嵌段A包含聚乙烯基芳烃，嵌段B包含聚(单链烯基)，和x是至少为1的整数，聚烯烃，聚交酯，聚乙烯醇，共聚多酯，聚酯，聚环氧乙烷聚醚酰胺，聚酯醚嵌段共聚物，聚酰胺和其结合物；
45％重量至75％重量的包含聚丙烯酸酯的球状超吸收性聚合物颗粒；和
15％重量至40％重量的增塑剂，
所述的组合物在300显示不大于65,000厘泊的粘度。
2.权利要求1的热塑性组合物，其中所述的超吸收性聚合物颗粒有20μm至30μm的中值粒径。
3.权利要求1或2的热塑性组合物，还包含表面活性剂。
4.权利要求1或2的热塑性组合物，包含60％重量至75％重量的所述超吸收性聚合物，其中组合物中各组分之和为100％重量。
5.权利要求1或2的热塑性组合物，其中的嵌段共聚物选自苯乙烯-异戊二烯-苯乙烯，苯乙烯-乙烯-丁烯-苯乙烯，苯乙烯-乙烯-丙烯-苯乙烯，苯乙烯-丁二烯-苯乙烯和它们的结合物。
6.权利要求1或2的热塑性组合物，其中所述的组合物显示的水凝胶时间不多于2分钟，显示的0.9％食盐水溶液凝胶时间不多于10分钟，显示的吸收量为至少100g水/g组合物，显示的吸收量为至少35g0.9％食盐水溶液/g组合物，或显示出上述的组合。
7.权利要求1或2的热塑性组合物，还包含增粘剂。
8.权利要求1或2的热塑性组合物，其中所述超吸收性聚合物颗粒包含含有20μm至30μm中值粒径的球状超吸收性颗粒与51μm至64μm中值粒径的球状超吸收性颗粒的混合物。
9.权利要求1的热塑性组合物，其中所述热塑性聚合物包括聚丁烯。
10.权利要求1的热塑性组合物，其中所述热塑性聚合物包括聚(羟丁酸酯/羟戊酸酯)。
11.权利要求1的热塑性组合物，其中所述热塑性聚合物包括乙烯共聚体。
12.吸收制品，包括：
基材；和
权利要求1或2的热塑性组合物。
13.权利要求9的吸收制品，其中所述基材包含所述吸收制品的吸收芯，所述热塑性组合物分布在所述吸收芯上面，或引入所述吸收芯之中，或为二者的结合。
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