公开(公告)号：US6027806A

公开(公告)日：2000-02-22

申请号：US3342

申请日：1998-01-06

申请人： Tadashi Abe ,  Masaaki Yokoyama ,  Toshihiro Gotoh ,  Teruya Ohkuwa

发明人： Tadashi Abe ,  Masaaki Yokoyama ,  Toshihiro Gotoh ,  Teruya Ohkuwa

IPC分类号： B29B9/12 ,  C08J3/12 ,  C08J9/16 ,  C08J9/18 ,  B32B5/16 ,  C08J3/34

CPC分类号： C08J9/18 ,  B29B9/12 ,  C08J9/16 ,  C08J2323/02 ,  Y10T428/2998

摘要： The present invention relates to an expanded resin bead comprising:a core which comprises a crystalline thermoplastic resin and is in an expanded state, anda coat which comprises an ethylene-based polymer which is lower in melting point than said thermoplastic resin or shows substantially no melting point, and which coat is in a substantially unexpanded state.

摘要翻译： 本发明涉及一种发泡树脂珠粒，其包括：包含结晶热塑性树脂并处于膨胀状态的芯，以及包含熔点低于所述热塑性树脂的乙烯基聚合物或基本上不显示的涂层 熔点，哪个涂层处于基本未膨胀的状态。

公开(公告)号：US4908393A

公开(公告)日：1990-03-13

申请号：US321217

申请日：1989-03-09

申请人： Masakazu Arai ,  Hiroshi Endo ,  Toshihiro Gotoh ,  Toshio Yagi ,  Masanori Tanaka ,  Masanori Saito ,  Shigeki Mathuno

发明人： Masakazu Arai ,  Hiroshi Endo ,  Toshihiro Gotoh ,  Toshio Yagi ,  Masanori Tanaka ,  Masanori Saito ,  Shigeki Mathuno

IPC分类号： B60R19/03 ,  C08J9/22

CPC分类号： C08J9/22 ,  B60R19/03 ,  C08J2323/10 ,  Y10T428/233 ,  Y10T428/2982

摘要： Foamed particles of a propylene resin are described which comprises, as a base resin, a random copolymer of propylene and 1-butene, said random copolymer having a 1-butene content of from 3 to 12% by weight.A foamed mold article is also described which is composed of a random copolymer of propylene and 1-butene, and having a density of from 0.015 to 0.09 g/cm.sup.3.A bumper core material for use in automobile bumpers is also discribed which is composed of a foamed mold article of a random copolymer of propylene and 1-butene, said random copolymer having a 1-butene content of from 3 to 12% by weight, said foamed mold article having a density of from 0.02 to 0.08 g/cm.sup.3, a compression stress at 50% compression as measured at 20.degree. C. of 2.5 to 10 kg/cm.sup.2, and an energy absorption efficiency as measured at 20.degree. C. of 60 to 90% the ratio (E.sub.80 /E.sub.20) of the amount of the energy absorption of said foamed mold article as measured at 80.degree. C. (E.sub.80) to the amount of the energy absorption of said foamed mold article as measured at 20.degree. C. (E.sub.20) being 0.5 to 0.9.

公开(公告)号：US4812484A

公开(公告)日：1989-03-14

申请号：US086580

申请日：1987-08-18

申请人： Hiroshi Endo ,  Toshihiro Gotoh

发明人： Hiroshi Endo ,  Toshihiro Gotoh

IPC分类号： B29B11/14 ,  C08J9/14 ,  C08J9/16 ,  C08J9/18 ,  C08J9/22

CPC分类号： C08J9/18 ,  C08J9/141 ,  C08J2355/02

摘要： A process for producing expanded particles of a styrene-acrylonitrile-butadiene copolymer is disclosed, comprising dispersing styrene-acrylonitride-butadiene copolymer particles in water in a closed vessel, feeding a volatile blowing agent to the aqueous dispersion in the closed vessel, heating the aqueous dispersion to a temperature higher than a glass transition point of the copolymer particles by at least 20.degree. C. to impregnate the volatile blowing agent into the copolymer particles, and opening one end of the closed vessel to release the aqueous dispersion containing the expandable copolymer particles into a low pressure zone having a pressure lower than the inner pressure of the closed vessel. The resulting expanded particles have a degree of expansion of from 10 to 50.

摘要翻译： 公开了一种制备苯乙烯 - 丙烯腈 - 丁二烯共聚物的发泡颗粒的方法，其包括将苯乙烯 - 丙烯腈 - 丁二烯共聚物颗粒分散在密闭容器中的水中，向挥发性发泡剂中加入密闭容器中的水性分散体， 分散至高于共聚物颗粒的玻璃化转变点的温度至少20℃，以将挥发性发泡剂浸渍到共聚物颗粒中，并且打开密封容器的一端以释放含有可发性共聚物颗粒的水性分散体 进入具有低于密闭容器的内部压力的压力的低压区域。 所得到的发泡颗粒具有10至50的膨胀度。

公开(公告)号：US5468781A

公开(公告)日：1995-11-21

申请号：US396896

申请日：1995-03-01

申请人： Toshihiko Sugano ,  Toshihiro Gotoh

发明人： Toshihiko Sugano ,  Toshihiro Gotoh

IPC分类号： C08F4/64 ,  C08F4/60 ,  C08F4/6592 ,  C08F8/00 ,  C08F10/06 ,  C08J9/16 ,  C08J9/18 ,  C08L23/10 ,  C08J9/22 ,  C08J9/228

CPC分类号： C08J9/18 ,  C08L23/12 ,  C08J2323/10 ,  C08L23/142 ,  C08L23/16 ,  C08L2314/06

摘要： There are provided polypropylene resin expanded particles which have a uniform bubble size, can be molded with an exceptionally low steam pressure, and can produce an expanded molded product having a good surface appearance and an excellent energy absorption property. The present particles are polypropylene resin expanded particles containing as a base resin an isotactic polypropylene resin polymerized in the presence of a metallocene polymerization catalyst.

摘要翻译： 提供具有均匀气泡尺寸的聚丙烯树脂发泡颗粒，可以以非常低的蒸汽压力模制，并且可以生产具有良好的表面外观和优异的能量吸收性能的发泡模制产品。 本发明的颗粒是在金属茂聚合催化剂存在下聚合的全同立构聚丙烯树脂作为基础树脂的聚丙烯树脂发泡颗粒。

公开(公告)号：US5032620A

公开(公告)日：1991-07-16

申请号：US446671

申请日：1989-12-06

申请人： Masakazu Arai ,  Hiroshi Endo ,  Toshihiro Gotoh ,  Toshio Yagi ,  Masanori Tanaka ,  Masanori Saito ,  Shigeki Mathuno

发明人： Masakazu Arai ,  Hiroshi Endo ,  Toshihiro Gotoh ,  Toshio Yagi ,  Masanori Tanaka ,  Masanori Saito ,  Shigeki Mathuno

IPC分类号： B60R19/03 ,  C08J9/22

CPC分类号： C08J9/22 ,  B60R19/03 ,  C08J2323/10 ,  Y10T428/233 ,  Y10T428/2982

摘要： Foamed particles of a propylene resin are described which comprises, as a base resin, a random copolymer of propylene and 1-butene, said random copolymer having a 1-butene content of from 3 to 12% by weight.A foamed mold article is also described which is composed of a random copolymer of propylene and 1-butene, and having a density of from 0.015 to 0.09 g/cm.sup.3.A bumper core material for use in automobile bumpers is also described which is composed of a foamed mold article of a random copolymer of propylene and 1-butene, said random copolymer having a 1-butene content of from 3 to 12% by weight, said foamed mold article having a density of from 0.02 to 0.08 g/cm.sup.3, a compression stress at 50% compression as measured at 20.degree. C. of 2.5 to 10 kg/cm.sup.2, and an energy absorption efficiency as measured at 20.degree. C. of 60 to 90%, the ratio (E.sub.80 /E.sub.20) of the amount of the energy absorption of said foamed mold article as measured at 80.degree. C. (E.sub.80) to the amount of the energy absorption of said foamed mold article as measured at 20.degree. C. (E.sub.20) being 0.5 to 0.9.