CN106380624A - Easily-molded polypropylene foaming bead and preparation method thereof - Google Patents

Easily-molded polypropylene foaming bead and preparation method thereof Download PDF

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CN106380624A
CN106380624A CN 201610793448 CN201610793448A CN106380624A CN 106380624 A CN106380624 A CN 106380624A CN 201610793448 CN201610793448 CN 201610793448 CN 201610793448 A CN201610793448 A CN 201610793448A CN 106380624 A CN106380624 A CN 106380624A
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foaming
easily
polypropylene
particles
bead
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CN 201610793448
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Chinese (zh)
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熊业志
杨亮炯
黄二波
刘缓缓
曾佳
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无锡会通轻质材料股份有限公司
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Abstract

The invention discloses a preparation method of an easily-molded polypropylene foaming bead. The easily-molded polypropylene foaming bead comprises a dispersant which is inorganic matter particles with the particle size of 0.01-60 [mu]m, a polypropylene polymer which is a propylene and copolymerization monomer copolymer with the propylene mol fraction being not lower than 60%, an aqueous disperse medium, and a physical foaming agent. The preferable dispersant is hydrated aluminosilicate kaolin with the particle size of 0.1-15 [mu]m, and 0.01-5 parts by weight of the hydrated aluminosilicate kaolin are added to every 100 parts by weight of the disperse medium . The dispersant has good suspension performance in water, and can be easily removed from the surface of foaming particles in the cleaning process after foaming completion, inorganic matter barrier on the surface of the foaming particles in the molding process is less, and the foaming particles can be well molten under a low steam pressure, so the energy consumed in the molding of the foaming bead is saved.

Description

一种易于模塑成型的聚丙烯发泡珠粒及其制备方法 A molded foamed polypropylene beads molding and easy method of preparation

技术领域 FIELD

[0001] 本发明涉及一种聚丙烯发泡珠粒,具体为一种易于模塑成型的聚丙烯发泡珠粒及其制备方法。 [0001] The present invention relates to expanded polypropylene beads and polypropylene foam beads preparation method, in particular to an easily molded.

背景技术 Background technique

[0002] 聚丙烯发泡材料有着优异的力学性能,且易于回收再利用,正逐步的取代聚苯乙烯发泡材料,应用越来越广泛。 [0002] The polypropylene foam material has excellent mechanical properties, and is easy to recycle, is gradually substituted polystyrene foam material, more widely. 聚丙烯发泡珠粒(EPP)既有高的膨胀比,又能模塑成型为形状复杂、尺寸精度高的制品,极大地扩展了发泡材料的应用领域,EPP制件在包装、汽车制造业等领域的使用日益增加。 Expanded beads of polypropylene (EPP) both a high expansion ratio, but also for the molding of complex shapes, high dimensional accuracy of the products, greatly expands the field of application of the foamed material, EPP parts packaging, automotive industry and other fields of use is increasing.

[0003] 目前,工业上采用间歇式反应釜发泡法生产聚丙烯发泡珠粒,然后通过水蒸气模塑成型的方法将EPP珠粒熔结成各式各样的使用产品。 [0003] Currently, foaming reactor batchwise production of polypropylene foam beads industrially by the process steam and then molding the EPP beads are sintered into a wide range of use of the product. 生产发泡珠粒:聚丙烯树脂颗粒、水性分散介质、分散剂、发泡剂一起被装入密闭的高压釜,在搅拌的作用下,通过加热装置将釜中的分散体加热至高于聚丙烯软化点的温度,让发泡剂充分的浸渍聚丙烯树脂颗粒,然后将分散体卸料到大气中得到发泡珠粒。 Production expanded beads: a polypropylene resin particles, an aqueous dispersion medium, a dispersant, a foaming agent together in sealed autoclave, under stirring action by the heating means of the dispersion in the autoclave was heated to a temperature above the polypropylene the softening point, so that the blowing agent sufficiently impregnated polypropylene resin particles, and then discharging the dispersion to the atmosphere to obtain expanded beads. 发泡过程中分散剂的作用是防止受热软化的树脂颗粒相互粘结,另一方面,卸压得到的发泡珠粒经水槽水洗后其表面仍会粘附一定量的分散剂,这会阻碍发泡粒子在蒸汽模塑过程中相互熔结,导致EPP珠粒模塑成型的蒸汽压力更高,且易出现表面熔结缺陷。 Dispersants foaming process is to prevent mutual adhesion of the resin particles softened by heat, on the other hand, the relief obtained expanded beads after washing tub still adhering surface thereof an amount of the dispersing agent, that will block expanded particles sintered with each other in a steam molding process, resulting in higher steam pressure molding of EPP beads, and the surface defects prone to sintering.

发明内容 SUMMARY

[0004] 本发明要解决的技术问题是克服现有EPP珠粒模塑成型时,发泡珠粒经水槽水洗后其表面仍会粘附一定量的分散剂,阻碍发泡粒子在蒸汽模塑过程中相互熔结,导致EPP珠粒模塑成型的蒸汽压力较高,同时可以较大程度上改善制品表面缺陷等问题,提供一种易于模塑成型的发泡聚丙烯珠粒的生产方法。 [0004] The present invention is to solve the technical problem is overcome EPP beads molded, expanded beads after washing tub still adhering surface thereof an amount of the dispersing agent, hindered steam molding expanded particles mutually sintering process, resulting in higher steam pressure EPP beads molding, and can improve the products surface defect problems to a large extent, to provide an easy method for producing a molded foamed polypropylene beads.

[0005] 为了解决上述技术问题,本发明提供了如下的技术方案: [0005] To solve the above problems, the present invention provides the following technical solutions:

[0006] -种易于模塑成型的聚丙烯发泡珠粒,包括以下组分: [0006] - the kind readily molded polypropylene foam beads, comprising the following components:

[0007] 分散剂,所述分散剂粒径为0.01-60WI1的无机物微粒;包括氧化锌、硫酸钡、碳酸钙、硅铝酸盐等,优选主要成分为水合硅铝酸盐的高岭土,因为水合高岭土在水中的悬浮性好,优选水合硅铝酸盐的高岭土的尺寸为0.1-15WI1;在一定范围内水合硅铝酸盐的高岭土的粒径越小,其比表面积越大分散效果会更好,且在水中的悬浮性能更好,更易被洗涤,但水合硅铝酸盐的高岭土的粒径太小易团聚严重,反而导致其分散效果变差。 [0007] dispersing agent, the dispersing agent is a particle diameter of inorganic fine particles 0.01-60WI1; include zinc oxide, barium sulfate, calcium carbonate, aluminosilicates, etc., preferably mainly composed of hydrated aluminosilicate kaolin, because hydrous kaolin suspension in water is good, the size of the kaolin is preferably hydrated aluminosilicate 0.1-15WI1; smaller within a predetermined range hydrated aluminosilicate particle size kaolin, the larger the specific surface area thereof is more dispersion good, and better performance was suspended in water, it is more easily washed, but hydrated aluminosilicate of small particle size kaolin easy to join serious, but it leads to poor dispersion. 优选水合高岭土用量为每100重量份的分散介质,添加高岭土〇. 01-5重量份,更优选0.05-1重量份。 Preferably hydrous kaolin in an amount of 100 parts per weight of the dispersion medium, adding kaolin square. 01-5 parts by weight, more preferably 0.05 to 1 parts by weight. 所选高岭土作为分散剂,其分散机理是在分散介质中形成胶体并单独的包裹每一个悬浮在分散介质中的聚丙烯颗粒,防止发泡过程中受热软化的聚丙烯颗粒相互粘结。 Selected kaolin as a dispersant, the dispersion mechanism is in the form colloidal dispersion medium and individually wrapped each suspended in a dispersion medium of polypropylene particles, polypropylene particles are bonded to each other to prevent foaming during heat-softened.

[0008] 聚丙烯聚合物,所述聚丙烯聚合物为丙烯和一种或多种共聚单体的共聚物,丙烯摩尔分数多60% ;优选至少多80%,两种或多种共聚物的混合物,或者均聚物和共聚物的混合物。 [0008] The polypropylene polymers, the polypropylene polymer is a propylene and one or more comonomers, propylene molar fraction of 60% more; preferably at least 80% more, two or more copolymers the mixture, or mixtures of homopolymers and copolymers. 共聚物的例子包括丙烯-乙烯嵌段共聚物、丙烯-乙烯无规共聚物、丙烯-乙烯-丁烯无规共聚物。 Examples of copolymers include a propylene - ethylene block copolymer, a propylene - ethylene random copolymers, propylene - ethylene - butene random copolymer.

[0009] 水性分散介质;分散介质为乙醇、甘油、水中的任意一种,优选水,更优选去离子水。 [0009] The aqueous dispersion medium; dispersion media is ethanol, glycerol, any of the water, preferably water, more preferably deionized water.

[0010] 物理发泡剂;所述物理发泡剂为丁烷、戊烷、水蒸气、空气和c〇2中的任意一种。 [0010] The physical blowing agent; any of the physical blowing agent is butane, pentane, water vapor, air and c〇2 of one.

[0011] 发明所得到的聚丙烯发泡珠粒的DSC熔融曲线均出现双熔融峰结构,其中高温熔融峰出现是因为在发泡过程的气体浸渍期间,树脂颗粒中有未熔的晶体进一步重排、完善而形成了熔融温度高于聚丙烯原始熔点的晶体结构;低温熔融峰的出现是气体浸渍期间树脂中已融化的晶体在释压后的冷却过程中重结晶的缘故。 [0011] DSC melting curve of expanded polypropylene beads of the invention are obtained double melting peak structure appears, in which high-temperature melting peak appears because during the foaming process of the gas impregnation, the resin particles are further heavy unmelted crystals row, to form a complete crystal structure of the original melting temperature higher than the melting point of the polypropylene; melting peak occurs at low temperature during the gas impregnating resin is melted crystals during cooling after pressure release recrystallized sake. EPP制件模塑成型的蒸汽温度一般选在EPP双熔融峰之间的温度。 EPP molding steam temperature is generally selected article at a temperature between EPP double melting peak. 在成型时EPP的低温晶体融化以促进珠粒间的粘结,而高温晶体不熔化以保证发泡珠粒的泡孔形态和模塑制品的力学性能。 EPP molding at a low temperature to facilitate bonding between the crystal melt beads, but does not melt the high temperature to ensure crystal cell morphology and mechanical properties of the foamed beads molded article. 高温熔融峰的热焓值一般优选为2_20J/g,其热焓过低发泡珠粒的吸能性会变差,热焓值高时发泡珠粒不易熔结。 Enthalpy of melting peak temperature is generally preferably 2_20J / g, which low enthalpy the expanded beads become poor energy absorption, high enthalpy expanded beads easy sintering.

[0012] 本发明的易于模塑成型的发泡聚丙烯珠粒是一种表面残留无机颗粒少(表面残留的无机物会很大程度上提高EPP粒子粘合温度)而易于熔结的成型用发泡聚丙烯珠粒。 [0012] easily molded foamed polypropylene beads of the present invention is a little left on the surface of the inorganic particles (inorganic material remaining on the surface of the EPP particles will greatly improve the bonding temperature) and easy-sintered molding foamed polypropylene beads. 由于分散剂在水中悬浮性能好,在发泡完成后的清洗工艺中,分散剂更易从发泡粒子的表面除去,成型过程中发泡粒子表面的无机物阻隔少,在更低的蒸汽压力下发泡粒子能有很好的熔结,节省发泡珠粒模塑成型时的能耗。 Good suspension properties since the dispersing agent in water in the cleaning process after the completion of foaming, the dispersing agent is removed from the surface of more expanded particles, inorganic less molding process of the surface of the barrier expanded particles at a lower steam pressure expanded particles can have a good sintering, to save energy when molding the expanded beads.

附图说明 BRIEF DESCRIPTION

[0013] 附图用来提供对本发明的进一步理解,并且构成说明书的一部分,与本发明的实施例一起用于解释本发明,并不构成对本发明的限制。 [0013] The accompanying drawings provide a further understanding of the present invention, and constitute part of this specification, the embodiments of the invention, serve to explain the invention, not to limit the present invention. 在附图中: In the drawings:

[0014] 图1是本发明的聚丙烯发泡珠粒典型的双熔融峰曲线; [0014] FIG. 1 is a typical two polypropylene foam beads of the present invention, the melting peak curve;

[0015] 图2是实施例1的发泡聚丙烯珠粒表面SEM图片; [0015] Figure 2 is an expanded polypropylene bead surface SEM photograph of Example 1;

[0016] 图3是实施例4的发泡聚丙烯珠粒表面SEM图片。 [0016] FIG. 3 is an embodiment 4 of expanded polypropylene bead surface SEM image.

具体实施方式 detailed description

[0017] 以下对本发明的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本发明,并不用于限定本发明。 [0017] Hereinafter, preferred embodiments of the present invention will be described, it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0018] 实施例1 [0018] Example 1

[0019] -种易于模塑成型的聚丙烯发泡珠粒,包括以下组分: [0019] - the kind readily molded polypropylene foam beads, comprising the following components:

[0020] 分散剂,分散剂粒径为20M1的水合硅铝酸盐的高岭土,用量为3kg; [0020] dispersing agent, the dispersing agent is hydrated silicon particle size kaolin 20M1 aluminosilicate, in an amount of 3kg;

[0021] 丙烯-乙烯-丁烯无规共聚物树脂500kg,丙烯摩尔分数多80% ; [0021] a propylene - ethylene - butene random copolymer resin 500kg, 80% mole fraction of propylene plurality;

[0022] 水性分散介质去离子水1000kg; [0022] The aqueous dispersion medium 1000kg deionized water;

[0023] 物理发泡剂C02。 [0023] The physical blowing agent C02.

[0024] 实施例2 [0024] Example 2

[0025] -种易于模塑成型的聚丙烯发泡珠粒,包括以下组分: [0025] - the kind readily molded polypropylene foam beads, comprising the following components:

[0026] 分散剂,分散剂粒径为20WI1的水合硅铝酸盐的高岭土,用量为2kg; [0026] dispersing agent, the dispersing agent is hydrated silicon particle size kaolin 20WI1 aluminosilicate, in an amount of 2kg;

[0027] 丙烯-乙烯-丁烯无规共聚物树脂500kg,丙烯摩尔分数多80% ; [0027] a propylene - ethylene - butene random copolymer resin 500kg, 80% mole fraction of propylene plurality;

[0028] 水性分散介质去离子水1000kg; [0028] The aqueous dispersion medium 1000kg deionized water;

[0029] 物理发泡剂C02。 [0029] The physical blowing agent C02.

[0030] 实施例3 [0030] Example 3

[0031] -种易于模塑成型的聚丙烯发泡珠粒,包括以下组分: [0031] - the kind readily molded polypropylene foam beads, comprising the following components:

[0032] 分散剂,分散剂粒径为2mi的水合硅铝酸盐的高岭土,用量为3kg; [0032] dispersing agent, the dispersing agent is a particle size of hydrated aluminosilicate 2mi kaolin in an amount of 3kg;

[0033] 丙烯-乙烯-丁烯无规共聚物树脂500kg,丙烯摩尔分数多80% ; [0033] a propylene - ethylene - butene random copolymer resin 500kg, 80% mole fraction of propylene plurality;

[0034] 水性分散介质去离子水1000kg; [0034] The aqueous dispersion medium 1000kg deionized water;

[0035] 物理发泡剂C02。 [0035] The physical blowing agent C02.

[0036] 实施例4 [0036] Example 4

[0037] 一种易于模塑成型的聚丙烯发泡珠粒,包括以下组分: [0037] A readily molded polypropylene foam beads, comprising the following components:

[0038] 分散剂,分散剂粒径为2M1的水合硅铝酸盐的高岭土,用量为2kg; [0038] dispersing agent, the dispersing agent is hydrated silicon particle size kaolin 2M1 aluminosilicate, in an amount of 2kg;

[0039] 丙烯-乙烯-丁烯无规共聚物树脂500kg,丙烯摩尔分数多80% ; [0039] a propylene - ethylene - butene random copolymer resin 500kg, 80% mole fraction of propylene plurality;

[0040] 水性分散介质去离子水1000kg; [0040] The aqueous dispersion medium 1000kg deionized water;

[0041] 物理发泡剂C〇2。 [0041] C〇2 physical blowing agent.

[0042] 实施例5 [0042] Example 5

[0043] -种易于模塑成型的聚丙烯发泡珠粒,包括以下组分: [0043] - the kind readily molded polypropylene foam beads, comprising the following components:

[0044] 分散剂,分散剂粒径为5mi的粘土,用量为2kg; [0044] dispersing agent, the dispersing agent 5mi clay particle diameter, an amount of 2kg;

[0045] 丙烯-乙烯无规共聚物或丙烯均聚物500kg,丙烯摩尔分数多80% ; [0045] The propylene - ethylene random copolymer or propylene homopolymer 500kg, 80% mole fraction of propylene plurality;

[0046] 水性分散介质去离子水1000kg; [0046] The aqueous dispersion medium 1000kg deionized water;

[0047] 物理发泡剂C02。 [0047] The physical blowing agent C02.

[0048] [0048]

Figure CN106380624AD00051

[0049] 在模塑成型的板材(120cmX lOOcmX 10cm)的最长边(120cm)上,沿一条垂直于其纵向的等分线,形成一个2cm深度的切口,通过弯曲,样品沿切割线断裂成两半,观察断面, 断面上损坏泡孔的珠粒数目占总珠粒数目的百分比即为样品的熔结程度,此比例越高表明熔结越好。 [0049] The molding on the plate (120cmX lOOcmX 10cm) of the longest side (120cm), a direction perpendicular to its longitudinal bisector, 2cm depth forming a notch by bending, fracture along the cutting line into the sample two halves, the section was observed, the number of beads in the cross-section damaged cells total number of beads sintering degree is the percentage of the sample, showed that the higher this ratio the better the sintering. 由实施例1和实施例2、实施例3和实施例4比较,可以表明在高岭土粒径相同的条件下,发泡过程中高岭土的添加量越少,则在相同成型压力下EPP珠粒体现出更优的熔结性能,基本达到下游客户成型制件熔结度要求。 From Example 1 and Example 2, Example 3 and Comparative Example 4, can be shown that under the same conditions kaolin particle, the smaller the amount of kaolin was added during the foaming process, the EPP beads are reflected at the same molding pressure a better sintering properties, reaches the downstream customers requirement sintered molded article. 从实施例1和实施例3、实施例2和实施例4两个实施例比较,可以表明,在高岭土相同添加量的情况下,粒径更小的高岭土作分散剂时,EPP 珠粒表现出更低的成型压力和更好的熔结度。 From Example 2 and Example 1 and Example Example 3 Example 4 Comparative Example two embodiments, it can be shown that, in the case where the same amount of kaolin is added, the particle size of the smaller kaolin as a dispersant, EPP beads exhibit a lower molding pressure of the melt and better knot. 由实施例2和3对比可以表明,相对于大粒径高岭土而言,粒径小的高岭土即使在高添加量的情况下,依然具有较低的成型压力和较好的熔结度,以上实施例的结果都证明了粒径较小的高岭土因其在水中悬浮性更好,在洗涤工序中更易从EPP珠粒表面除去,有助于EPP珠粒在较低的成型压力时具有更优的熔结度。 Comparative Examples 2 and 3 from the embodiment can show a large particle size kaolin relative small particle size kaolin clay even at high amount of addition, still has a lower molding pressure and good sintering degree, the above embodiments the results of Examples have demonstrated its small particle size kaolin clay was suspended in water and better, more EPP beads were removed from the surface of the washing step, it helps EPP beads having better at lower molding pressures sintering degree.

[0050] 图1是本发明的聚丙烯发泡珠粒典型的双熔融峰曲线;其熔融双峰的形成原因和对成型的影响在发明内容中已提及。 [0050] FIG. 1 is a typical two polypropylene foam beads of the present invention, melting curve peaks; the causes melting and molding a bimodal effect on the already mentioned in the Summary.

[0051] 图2是实施例1的发泡聚丙烯珠粒表面SEM图片;选用粒径大的高岭土作分散剂时, 高岭土在水中悬浮性相对较差,在清洗工艺中不易被洗掉,残留在EPP珠粒表面的分散剂较多,阻碍EPP的模塑成型。 [0051] Figure 2 is an expanded polypropylene bead surface SEM image of Example 1; the selection of large particle size kaolin as a dispersant, a suspension of kaolin in water, relatively poor, can not easily be washed off in the cleaning process, residual dispersant EPP more bead surface, hindering molded EPP molding.

[0052]图3是实施例4的发泡聚丙烯珠粒表面SEM图片。 [0052] FIG. 3 is an embodiment 4 of expanded polypropylene bead surface SEM image. 选用粒径小的高岭土作分散剂时, 高岭土在水中悬浮性好,在清洗工艺中易被洗掉,残留在EPP珠粒表面的分散剂很少,利于EPP模塑成型。 When selecting a small particle size kaolin as a dispersant, a suspension of kaolin in water and good wash off easily in the cleaning process, the dispersant remaining in the bead surface EPP little beneficial EPP molding.

[0053] 最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明, 尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。 [0053] Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention, but the present invention is not intended to limit the present invention. Although the detailed description of the embodiments, those skilled in the art that aspect, each of which can still be described embodiments of the foregoing embodiment may be modified, or some technical features equivalents. 凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 Any modification within the spirit and principle of the present invention, made, equivalent substitutions, improvements, etc., should be included within the scope of the present invention.

Claims (10)

  1. 1. 一种易于模塑成型的聚丙烯发泡珠粒,其特征在于,包括以下组分: 分散剂,所述分散剂粒径为0.01-60WI1的无机物微粒; 聚丙烯聚合物,所述聚丙烯聚合物为丙烯和共聚单体的共聚物,丙烯摩尔分数多60 % ; 水性分散介质; 物理发泡剂。 An easily molded of polypropylene foam beads, characterized by comprising the following components: a dispersant, the dispersant particle diameter of the inorganic fine particles 0.01-60WI1; polypropylene polymers, the polypropylene polymer is a copolymer of propylene and comonomer mole fraction of propylene 60% more; aqueous dispersion medium; physical blowing agents.
  2. 2. 如权利要求1所述的易于模塑成型的聚丙烯发泡珠粒,其特征在于,所述分散剂为氧化锌、硫酸钡、碳酸钙、硅铝酸盐和水合硅铝酸盐的高岭土的任意一种或几种。 2. Ease of molded polypropylene foam beads according to claim 1, wherein the dispersing agent is zinc oxide, barium sulfate, calcium carbonate, hydrated aluminosilicates, and aluminosilicate any one or more of kaolin.
  3. 3. 如权利要求2所述的易于模塑成型的聚丙烯发泡珠粒,其特征在于,所述分散剂为粒径为0.1-15M1的水合硅铝酸盐的高岭土,每100重量份的分散介质中水合硅铝酸盐的高岭土的添加量0.01-5重量份。 3. Ease of molded polypropylene foam beads according to claim 2, wherein said dispersing agent is a particle size of the aluminosilicate hydrated silicon 0.1-15M1 kaolin, per 100 parts by weight of the amount of dispersion medium is added hydrated aluminosilicate of from 0.01 to 5 parts by weight of kaolin.
  4. 4. 如权利要求3所述的易于模塑成型的聚丙烯发泡珠粒,其特征在于,每100重量份的分散介质中水合硅铝酸盐的高岭土的添加量〇. 05-1重量份。 Polypropylene foam beads as claimed in claim easy molding 305-1 parts by weight, characterized in that, per 100 parts by weight of the dispersion medium hydrated aluminosilicate added amount of kaolin billion. .
  5. 5. 如权利要求1所述的易于模塑成型的聚丙烯发泡珠粒,其特征在于,所述的聚丙烯聚合物中丙烯摩尔分数多80%。 5. The polypropylene foam beads easy molding according to claim 1, wherein the polypropylene polymer in the propylene mole fraction of 80 percent more.
  6. 6. 如权利要求5所述的易于模塑成型的聚丙烯发泡珠粒,其特征在于,所述的聚丙烯聚合物为丙烯-乙烯嵌段共聚物、丙烯-乙烯无规共聚物或丙烯-乙烯-丁烯无规共聚物。 6. The polypropylene foam beads easy molding of claim 5, wherein said polypropylene polymer is a propylene - ethylene block copolymer, propylene - random ethylene-propylene copolymer or - ethylene - butene random copolymer.
  7. 7. 如权利要求1所述的易于模塑成型的聚丙烯发泡珠粒,其特征在于,分散介质为乙醇、甘油、水中的任意一种。 7. Ease of molded polypropylene foam beads according to claim 1, characterized in that the dispersion medium is ethanol, glycerol, any of water.
  8. 8. 如权利要求1所述的易于模塑成型的聚丙烯发泡珠粒,其特征在于,所述物理发泡剂为丁烷、戊烷、水蒸气、空气和C02中的任意一种。 Polypropylene foam beads easy molding as claimed in claim 1, wherein the physical blowing agent is any one of butane, pentane, water vapor, air and C02 in.
  9. 9. 如权利要求1所述的易于模塑成型的聚丙烯发泡珠粒,其特征在于,包括以下组分: 粒径为0. l-15wii的水合硅铝酸盐的高岭土; 丙烯-乙烯-丁烯无规共聚物,丙烯摩尔分数多80%; 水性分散介质去离子水; 物理发泡剂C〇2。 9. The polypropylene foam beads were molded easily according to claim 1, characterized in that it comprises the following components: a particle diameter of 0. l-15wii hydrated aluminosilicate kaolin; propylene - ethylene - butene random copolymer, a propylene mole fraction of 80% more; deionized water, an aqueous dispersion medium; C〇2 physical blowing agents.
  10. 10. -种如权利要求1所述的易于模塑成型的聚丙烯发泡珠粒的制备方法,其特征在于,高温熔融峰的热焓值为2-20J/g。 10. - The method for producing species, such as easy molding of polypropylene foam beads according to claim 1, characterized in that the enthalpy value of melting peak temperature 2-20J / g.
CN 201610793448 2016-08-31 2016-08-31 Easily-molded polypropylene foaming bead and preparation method thereof CN106380624A (en)

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