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    • 1. 发明授权
    • Pre-expanded particles of propylene resin, process for preparing the
same and flow-restricting device
    • 丙烯树脂的预发泡颗粒,其制备方法和流动限制装置
    • US06130266A
    • 2000-10-10
    • US495329
    • 2000-02-01
    • Tsuyoshi MihayashiNobuhisa OtaNaruhiko AkamatsuYutaka YanagiharaTakeshi Satoh
    • Tsuyoshi MihayashiNobuhisa OtaNaruhiko AkamatsuYutaka YanagiharaTakeshi Satoh
    • C08J9/18C08L23/08C08L23/10C08J9/16C08J9/22
    • C08J9/18C08L23/10C08J2203/06C08J2323/16C08L23/0876Y10S521/917
    • There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prepared by the process comprising dispersing resin particles comprising a propylene resin composition, which contains 100 parts by weight of (A) a random copolymer of ethylene and propylene having an ethylene content of 1.5 to 4.5% by weight and 0.001 to 10 parts by weight of (B) an alkali metal salt of a copolymer of ethylene and (meth)acrylic acid, into an aqueous dispersion medium in a pressure vessel to obtain a mixture, heating the mixture to an expansion temperature higher than a softening temperature of the resin particles, introducing an inorganic gas, and releasing the mixture into a lower atmosphere than the inner pressure of the pressure vessel; said mixture is expanded after a temperature of said mixture is maintained at a temperature region of not more than the expansion temperature to at least (the expansion temperature -1.degree. C.) for at least 30 minutes.
    • 在不使用挥发性发泡剂或增加膨胀压力的情况下,提供具有高膨胀率和优异的模制粘合性的丙烯树脂的预发泡颗粒。 丙烯树脂的预发泡颗粒通过包括分散树脂颗粒的方法制备,所述树脂颗粒包含丙烯树脂组合物,其包含100重量份的(A)乙烯含量为1.5至4.5重量%的乙烯和丙烯的无规共聚物, 和(B)乙烯与(甲基)丙烯酸的共聚物的碱金属盐0.001〜10重量份,在压力容器中的水分散介质中,得到混合物,将混合物加热至膨胀温度 高于树脂颗粒的软化温度,引入无机气体,并将混合物释放到比压力容器的内部压力低的气氛中; 所述混合物在所述混合物的温度保持在不大于膨胀温度至少至(膨胀温度-1℃)的温度区域下膨胀至少30分钟。
    • 2. 发明授权
    • Pre-expanded particles of propylene resin, process for preparing the same and flow-restricting device
    • 丙烯树脂的预发泡颗粒,其制备方法和流动限制装置
    • US06273347B1
    • 2001-08-14
    • US09642025
    • 2000-08-21
    • Tsuyoshi MihayashiNobuhisa OtaNaruhiko AkamatsuYutaka YanagiharaTakeshi Satoh
    • Tsuyoshi MihayashiNobuhisa OtaNaruhiko AkamatsuYutaka YanagiharaTakeshi Satoh
    • B05B130
    • C08J9/18C08J2203/06C08J2323/16C08L23/0876C08L23/10Y10S521/917C08L2666/04
    • There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prepared by the process comprising dispersing resin particles comprising a propylene resin composition, which contains 100 parts by weight of (A) a random copolymer of ethylene and propylene having an ethylene content of 1.5 to 4.5% by weight and 0.001 to 10 parts by weight of (B) an alkali metal salt of a copolymer of ethylene and (meth)acrylic acid, into an aqueous dispersion medium in a pressure vessel to obtain a mixture, heating the mixture to an expansion temperature higher than a softening temperature of the resin particles, introducing an inorganic gas, and releasing the mixture into a lower atmosphere than the inner pressure of the pressure vessel; said mixture is expanded after a temperature of said mixture is maintained at a temperature region of not more than the expansion temperature to at least (the expansion temperature −1° C.) for at least 30 minutes.
    • 在不使用挥发性发泡剂或增加膨胀压力的情况下,提供具有高膨胀率和优异的模制粘合性的丙烯树脂的预发泡颗粒。 丙烯树脂的预发泡颗粒通过包括分散树脂颗粒的方法制备,所述树脂颗粒包含丙烯树脂组合物,其包含100重量份的(A)乙烯含量为1.5至4.5重量%的乙烯和丙烯的无规共聚物, 和(B)乙烯与(甲基)丙烯酸的共聚物的碱金属盐0.001〜10重量份,在压力容器中的水分散介质中,得到混合物,将混合物加热至膨胀温度 高于树脂颗粒的软化温度,引入无机气体,并将混合物释放到比压力容器的内部压力低的气氛中; 所述混合物在所述混合物的温度保持在不大于膨胀温度至少至(膨胀温度-1℃)的温度区域下膨胀至少30分钟。
    • 3. 发明授权
    • Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded molding
    • 含水聚烯烃树脂组合物,由其制备的预剥离颗粒,其制备方法和膨胀成型
    • US06596782B1
    • 2003-07-22
    • US09155544
    • 1998-09-25
    • Kenji MogamiTsuyoshi MihayashiKyoichi NakamuraNaruhiko Akamatsu
    • Kenji MogamiTsuyoshi MihayashiKyoichi NakamuraNaruhiko Akamatsu
    • C08J916
    • C08J9/18B29C44/3461C08J9/0061C08J2203/10C08J2323/02
    • A water-containing polyolefin resin composition containing a polyolefin resin and a hydrophilic polymer and having a water content of 1 to 50% by weight which is suitable for use in preparation of polyolefin resin pre-expanded particles, and pre-expanded particles of a polyolefin resin prepared by pre-expanding the water-containing polyolefin resin composition the particles having a an apparent expansion ratio of 5 to 60, a closed cell ratio of 80 to 100% and an average cell diameter of 50 to 500 &mgr;m. The pre-expanded particles can be prepared without using a volatile blowing agent by dispersing resin particles made of a polyolefin resin composition containing a polyolefin resin and a hydrophilic polymer into an aqueous dispersion medium in a closed vessel to form a dispersion, heating to a temperature not lower than the softening point of the polyolefin resin to produce water-containing resin particles having a water content of 1 to 50% by weight, and releasing the aqueous dispersion from the closed vessel into a lower pressure than the inner pressure of the closed vessel, thereby expanding the water-containing resin particles. When the releasing of the dispersion from the vessel is conducted after raising the inner pressure to 25 to 75 kg/cm2G by introducing nitrogen gas, air or an inorganic gas including them as a main component into the vessel, pre-expanded particles providing foams having good physical properties and a high expansion ratio are obtained.
    • 含有聚烯烃树脂和亲水性聚合物的水含量聚烯烃树脂组合物,其水含量为1-50重量%,其适用于制备聚烯烃树脂预发泡颗粒和聚烯烃预发泡颗粒 通过将含水聚烯烃树脂组合物的表观膨胀率为5〜60,闭孔率为80〜100%,平均泡孔直径为50〜500μm的颗粒预膨胀而制备的树脂。 可以通过将含有聚烯烃树脂和亲水性聚合物的聚烯烃树脂组合物制成的树脂颗粒分散在密闭容器中的水性分散介质中而不使用挥发性发泡剂来制备预发泡颗粒,以形成分散体,加热到温度 不低于聚烯烃树脂的软化点,以产生水含量为1至50重量%的含水树脂颗粒,并将水分散体从密闭容器中释放到比密封容器的内部压力低的压力 从而使含水树脂颗粒膨胀。 当通过将氮气,空气或其中包含它们的无机气体作为主要成分将内部压力升高到25至75kg / cm2G之后进行容器的分散时,预发泡颗粒提供具有 获得良好的物理性能和高膨胀率。