公开(公告)号：US4436840A

公开(公告)日：1984-03-13

申请号：US420874

申请日：1982-09-21

申请人： Hiroyuki Akiyama ,  Sumio Shimada ,  Kuninori Hirosawa ,  Hideki Kuwabara

发明人： Hiroyuki Akiyama ,  Sumio Shimada ,  Kuninori Hirosawa ,  Hideki Kuwabara

IPC分类号： B29C67/00 ,  B29B9/16 ,  B29C44/00 ,  B29C59/00 ,  B29K23/00 ,  B29K105/04 ,  C08J9/16 ,  C08J9/18 ,  C08J9/22 ,  B29D27/00

CPC分类号： C08J9/18 ,  C08J2203/142 ,  C08J2323/02 ,  Y10S264/09

摘要： In a process for producing pre-foamed particles of a polyolefin resin which comprises impregnating a volatile blowing agent into particles of a polyolefin resin while dispersing the resin particles and the blowing agent in a dispersing medium under heat in a closed vessel, opening one end of the vessel and releasing the resin particles and the dispersing medium simultaneously into an atmosphere kept at a lower pressure than the inside pressure of the vessel; the improvement wherein the pressure of the inside of the vessel after opening its one end is maintained at a substantially constant pressure which is at least 0.7 times the vapor pressure of the blowing agent before opening the end of the vessel.

摘要翻译： 在制造聚烯烃树脂的预发泡颗粒的方法中，其包括将挥发性发泡剂浸入聚烯烃树脂颗粒中，同时将树脂颗粒和发泡剂在密封容器中分散在分散介质中的加热分散介质中， 并将树脂颗粒和分散介质同时放入保持在低于容器内部压力的压力下的气氛中; 改进之处在于，在打开其一端之后，容器内部的压力保持在打开容器末端之前的发泡剂的蒸气压f的至少0.7倍的基本恒定的压力。

公开(公告)号：US4399087A

公开(公告)日：1983-08-16

申请号：US275620

申请日：1981-06-22

申请人： Hiroyuki Akiyama ,  Susumu Izawa ,  Kuninori Hirosawa ,  Hideharu Inada

发明人： Hiroyuki Akiyama ,  Susumu Izawa ,  Kuninori Hirosawa ,  Hideharu Inada

IPC分类号： C08J9/22 ,  B29C44/00 ,  B29C59/00 ,  B29C67/00 ,  C08J9/16 ,  C08J9/18 ,  C08J9/232 ,  B29D27/00

CPC分类号： C08J9/232 ,  C08J9/18 ,  C08J2203/142 ,  C08J2323/02 ,  Y10S264/05 ,  Y10S264/15 ,  Y10S264/16 ,  Y10S264/18

摘要： In a process for producing a foamed article of a polyolefin resin which comprises filling in a mold pre-foamed particles of a polyolefin resin containing a gaseous mixture consisting of an inorganic gas and a volatile organic blowing agent in their cells and heating them to mold a foamed article; the improvement wherein the pre-foamed particles of the resin are those in which the total pressure of the gaseous mixture is 1.4 to 2.5 kg/cm.sup.2 (abs.), with the partial pressure of the inorganic gas being maintained at 0.4 to 1.1 kg/cm.sup.2 (abs.) and the partial pressure of the volatile blowing agent at 0.8 to 1.6 kg/cm.sup.2 (abs.).

摘要翻译： 在制造聚烯烃树脂发泡体的方法中，包括在其单元中填充含有由无机气体和挥发性有机发泡剂组成的气态混合物的聚烯烃树脂的预发泡颗粒，并加热它们以模塑 发泡制品; 其中树脂的预发泡颗粒是气体混合物的总压力为1.4-2.5kg / cm2（绝对），其中无机气体的分压保持在0.4-1.1kg / cm 2（绝对），挥发性发泡剂的分压为0.8〜1.6kg / cm 2（绝对）。

公开(公告)号：US4260572A

公开(公告)日：1981-04-07

申请号：US40086

申请日：1979-05-17

申请人： Hiroyuki Akiyama ,  Nobuyoshi Shimoyashiki ,  Hideo Hatakeyama ,  Toru Yamamoto

发明人： Hiroyuki Akiyama ,  Nobuyoshi Shimoyashiki ,  Hideo Hatakeyama ,  Toru Yamamoto

IPC分类号： C08J9/12 ,  B29B7/00 ,  B29C47/00 ,  C08J9/00 ,  C08J9/14 ,  B29D27/00

CPC分类号： C08J9/0061 ,  C08J9/0014 ,  C08J9/143 ,  C08J2325/06 ,  C08J2425/00 ,  Y10S264/05

摘要： A foamed polystyrene board useful as a thermal insulating material is produced by melting a polystyrene having a melt index of from 0.5 to 5 under heat in an extruder, mixing the molten mass with a blowing agent composed of methyl chloride and dichlorodifluoromethane, and extruding the resulting foamable molten gel from the extruder. As a novel essential feature, a flowability improver having a melting point higher than 70.degree. C., such as an aromatic sulfonamide, a brominated aromatic compound, a brominated alicyclic compound or a poly(.alpha.-methylstyrene), is mixed with the polystyrene within the extruder to impart superior extrusion formability. The foam has good dimensional stability both at room temperature and higher temperature, high mechanical strength and superior thermal insulation properties.

摘要翻译： 用作绝热材料的发泡聚苯乙烯板通过在挤出机中在加热下熔融熔体指数为0.5至5的聚苯乙烯熔融而制得，将熔融物料与由氯甲烷和二氯二氟甲烷组成的发泡剂混合，并将所得的 来自挤出机的可发泡熔融凝胶。 作为新的基本特征，将熔点高于70℃的流动性改进剂如芳族磺酰胺，溴化芳族化合物，溴化脂环族化合物或聚（α-甲基苯乙烯）与聚苯乙烯混合 该挤出机具有优异的挤出成型性。 该泡沫体在室温和较高温度下具有良好的尺寸稳定性，高机械强度和优异的隔热性能。