公开(公告)号：EP0748350A4

公开(公告)日：1997-10-15

申请号：EP94928608

申请日：1994-09-16

申请人： DOW CHEMICAL CO

发明人： PAQUET ANDREW N ,  GRIFFIN WARREN H

IPC分类号： C08J9/12 ,  C08J9/14

CPC分类号： C08J9/127 ,  C08J9/12 ,  C08J2203/12 ,  C08J2203/14 ,  C08J2203/142 ,  C08J2325/02

摘要： Disclosed is a foam structure of desirable mechanical strenght made with a low molecular weight alkenyl aromatic polymer material and an inorganic blowing agent. The polymer material has an alkenyl aromatic polymer of a weight average molecular weight of 100,000 to 165,000. The foam structure can be made in processes with reduced pressure drop.

公开(公告)号：EP0723563A4

公开(公告)日：1998-04-22

申请号：EP94925167

申请日：1994-08-02

申请人： DOW CHEMICAL CO

发明人： HITCHCOCK MARTIN K ,  SUH KYUNG W ,  BARTZ ARNOLD M ,  PAQUET ANDREW N ,  STOBBY WILLIAM G

IPC分类号： C08J9/04 ,  C08J9/00 ,  C08J9/18 ,  C09C1/56 ,  C09C3/08 ,  C09C3/10 ,  B05D3/02 ,  B32B3/26

CPC分类号： B82Y30/00 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2006/10 ,  C08J9/0066 ,  C09C1/56 ,  C09C3/08 ,  C09C3/10

摘要： Disclosed is a compatibilized carbon black useful in melt processing of plastic material. The carbon black is coated with a compatibilizing agent which enhances the dispersibility of the carbon black in a melt of the plastic material. Further disclosed are processes for making plastic foam structures with the compatibilized carbon black.

公开(公告)号：EP0701584A4

公开(公告)日：1997-08-20

申请号：EP94919124

申请日：1994-05-12

申请人： DOW CHEMICAL CO

发明人： VO CHAU V ,  PAQUET ANDREW N

IPC分类号： C08J9/12 ,  C08J9/08

CPC分类号： C08J9/127 ,  C08J9/122 ,  C08J2203/14 ,  C08J2325/04 ,  Y10S521/91

摘要： Disclosed is a foamable styrenic polymer gel capable of forming a closed-cell foam structure, comprising: a) a flowable melt of a styrenic polymer material comprising greater than 50 percent by weight styrenic monomeric units and about 0.1 to about 40 percent by weight of oxygen-containing monomeric units based upon the total weight of the styrenic polymer material; and b) a blowing agent comprising about 5 weight percent or more carbon dioxide based upon the total weight of the blowing agent. Further disclosed is a process for making the foam structure. The oxygen-containing comonomer content in the styrenic polymer material enables process operating pressures to be significantly reduced when using carbon dioxide as a blowing agent compared to a styrenic polymer material without comonomer content. The foam structure formed is of low density and of good quality.

摘要翻译： 公开了能够形成闭孔泡沫结构的可发泡苯乙烯聚合物凝胶，其包含：a）苯乙烯聚合物材料的可流动熔体，其包含大于50重量％的苯乙烯单体单元和约0.1至约40重量％的氧气 基于苯乙烯类聚合物材料的总重量的单体单元; 和b）基于发泡剂的总重量，包含约5重量％或更多的二氧化碳的发泡剂。 进一步公开的是制造泡沫结构的方法。 苯乙烯类聚合物材料中的含氧共聚单体含量使得当使用二氧化碳作为发泡剂时，与不含共聚单体含量的苯乙烯类聚合物材料相比，工艺操作压力显着降低。 形成的泡沫结构密度低，质量好。

公开(公告)号：EP0681522A4

公开(公告)日：1996-02-28

申请号：EP94903474

申请日：1993-12-07

申请人： DOW CHEMICAL CO

发明人： SUH KYUNG W ,  WAKABAYASHI MASAYUKI ,  VO CHAU V ,  PAQUET ANDREW N

IPC分类号： C08J9/04 ,  C08J9/00 ,  B29C44/00 ,  C08J9/12

CPC分类号： C08J9/0014 ,  Y10S264/13

摘要： Disclosed is a process for making a closed-cell, alkenyl aromatic polymer foam structure having enlarged cell size. In the process, an alkenyl aromatic polymer material is heated to form a melt polymer material; a non-waxy cell size enlarging agent is incorporated into the melt polymer material; a blowing agent is incorporated into the melt polymer material at an elevated pressure to form a foamable gel; and the foamable gel is then expanded in a zone of lower pressure to form the foam structure. The enlarging agent is present in an amount sufficient to enlarge the stabilized cell size of the formed foam structure by 20 percent or more over a corresponding foam structure made without the enlarging agent. Further, the enlarging agent is incorporated in a quantity such that the formed foam structure has physical properties similar to the corresponding foam structure. Further, disclosed is a foam structure corresponding to the above.

公开(公告)号：EP0678070A4

公开(公告)日：1995-12-27

申请号：EP93925004

申请日：1993-10-22

申请人： DOW CHEMICAL CO

发明人： SUH KYUNG W ,  PAQUET ANDREW N

IPC分类号： C08J9/04 ,  B29C44/00 ,  B29K25/00 ,  C08J9/12 ,  B29D11/00

CPC分类号： C08J9/127 ,  C08J9/12 ,  C08J2203/12 ,  C08J2203/14 ,  C08J2203/142 ,  C08J2325/04 ,  Y10S521/91

摘要： Disclosed is a foamable styrenic polymer gel containing an aqueous blowing agent capable of forming a closed-cell, unimodal foam structure. The gel composes in admixture the flowable melt of a polymer composition having greater than 50 percent by weight of a styrenic polymer and a blowing agent having about 1 percent or more by weight water based upon the total weight of the blowing agent. The styrenic polymer has a degree of water solubility sufficient to ensure formation of a unimodal foam structure instead of a bimodal foam structure. The unimodal cell size distribution provides desirable fabricability and machinability characteristics for the foam structure.

公开(公告)号：EP0644912A4

公开(公告)日：1995-11-02

申请号：EP93915245

申请日：1993-06-08

申请人： DOW CHEMICAL CO

发明人： PAQUET ANDREW N ,  SUH KYUNG W ,  BINDER TOMAS I ,  VO CHAU V ,  KOCSIS DEBORAH L

IPC分类号： C08J9/12 ,  C08J9/14 ,  C08L25/04

CPC分类号： C08J9/127 ,  C08J2203/06 ,  C08J2203/12 ,  C08J2205/052 ,  C08J2325/04

摘要： Disclosed is an insulative, bimodal alkenyl aromatic polymer foam structure having microscopic pinholes in the cell walls to enhance the flexibility of the foam structure. Further disclosed is an insulative, bimodal alkenyl aromatic polymer foam structure containing carbon black. Further disclosed is a process for making low density alkenyl aromatic polymer foams prepared with a halogen-free blowing agent of carbon dioxide, lower alcohol and water. The cell size can be effectively controlled by controlling the amount of water in the blowing agent.

摘要翻译： 公开了一种绝缘双峰链烯基芳族聚合物泡沫结构，在泡孔壁中具有微观针孔以增强泡沫结构的柔韧性。 还公开了一种含有炭黑的绝缘双峰链烯基芳族聚合物泡沫结构。 还公开了制备用二氧化碳，低级醇和水的无卤素发泡剂制备的低密度链烯基芳族聚合物泡沫的方法。 通过控制发泡剂中的水量可以有效控制泡孔尺寸。