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1. 发明授权

US5120481A Process for preparing extruded foam bodies 失效
标题翻译：挤出泡沫体的制备方法
公开(公告)号：US5120481A
公开(公告)日：1992-06-09
申请号：US598020
申请日：1990-10-12
申请人： Joseph A. Brackman , Raymond M. Breindel
发明人： Joseph A. Brackman , Raymond M. Breindel
IPC分类号： C08J9/14
CPC分类号： B29C44/3407 , C08J9/144 , C08J2325/02
摘要： A process for preparing an extruded thermoplastic resin elongate foam body comprising an alkenyl-substituted aromatic resin characterized as having a density of between about 0.9 to about 3.5 pounds per cubic foot is described. The process comprises the steps of (A) heat plastifying the thermoplastic resin; (B) adding at least one fluid blowing agent comprising at least one of 1-chloro-1,1-difluoroethane, 1,1,1,2-tetrafluoroethane and 2-chloro-1,1,1,2-tetrafluoroethane; (C) uniformly mixing the blowing agent in the resin under a pressure sufficient to prevent blowing of the resin thereby forming a blowable resin mixture; (D) extruding the mixture into a region of reduced pressure which is less than atmospheric pressure wherein the blowable resin mixture expands into a foam body; and (E) cooling the foam body. In one embodiment, the region of less than atmospheric pressure is formed by an elongated chamber with the blowable resin mixture passing through a die at one end of such chamber and such foam body passing through a pool of water at the opposite end of the chamber. The process results in the formation of extruded expanded thermoplastic resins such as polystyrene resins characterized as having relatively small average cell sizes such as from about 0.2 to about 0.5 mm., improved and higher compressive strengths, and higher cell volumes.
摘要翻译：描述了一种制备挤出的热塑性树脂细长泡沫体的方法，其包含密度为约0.9至约3.5磅/立方英尺的密度的烯基取代的芳族树脂。该方法包括以下步骤：（A）对热塑性树脂进行热塑化; （B）添加至少一种包含1-氯-1,1-二氟乙烷，1,1,1,2-四氟乙烷和2-氯-1,1,1,2-四氟乙烷中的至少一种的流体发泡剂; （C）在足以防止树脂吹入的压力下将发泡剂均匀地混合在树脂中，从而形成可吹塑树脂混合物; （D）将混合物挤出到小于大气压的减压区域，其中可吹塑树脂混合物膨胀成泡沫体; 和（E）冷却泡沫体。在一个实施方案中，小于大气压的区域由细长的室形成，其中可吹塑树脂混合物通过这种室的一端处的模具，并且这种泡沫体通过在室的相对端的水池。该方法导致挤出的发泡热塑性树脂如聚苯乙烯树脂的形成，其特征在于具有相对较小的平均泡孔尺寸，例如约0.2至约0.5mm，改善的和较高的压缩强度以及更高的泡孔体积。

2. 发明授权

US6113374A Foam extrusion apparatus 失效
标题翻译：泡沫挤出机
公开(公告)号：US6113374A
公开(公告)日：2000-09-05
申请号：US999167
申请日：1997-12-29
申请人： Joseph A. Brackman , Raymond M. Breindel , Robert L. Sadinski
发明人： Joseph A. Brackman , Raymond M. Breindel , Robert L. Sadinski
IPC分类号： B01J3/00 , B01J3/03 , B29C44/34 , B29C44/50 , B29C44/60 , B29C47/08 , B29C47/16 , B29C47/34 , B29C47/36 , B29C47/78 , B29C47/88 , B29C47/90 , B29C47/92
CPC分类号： B29C44/3407 , B01J3/006 , B01J3/03 , B29C44/3403 , B29C44/50 , B29C44/60 , B29C47/0019 , B29C47/0023 , B29C47/003 , B29C47/0808 , B29C47/165 , B29C47/34 , B29C47/362 , B29C47/822 , B29C47/864 , B29C47/884 , B29C47/8895 , B29C47/90 , B29C47/92 , B29C2791/006 , B29C2947/92019 , B29C2947/92028 , B29C2947/92133 , B29C2947/92152 , B29C2947/92209 , B29C2947/92428 , B29C2947/92438 , B29C2947/92514 , B29C2947/92523 , B29C2947/92571 , B29C2947/9258 , B29C2947/92628 , B29C2947/92647 , B29C2947/92695 , B29C2947/92704 , B29C2947/92809 , B29C2947/92876 , B29C2947/92904 , B29C2947/92923 , B29C2947/92933 , B29C2947/92961 , B29C47/0021 , B29C47/0026 , B29C47/8835 , B29C47/904 , B29C47/905 , B29K2105/04
摘要： An extrusion system utilizes single or tandem extruders and a mixer-cooler to extrude a foamable extrudate through a die in a sealable chamber. The foamable extrudate is shaped and calibrated within the chamber. The die is mounted on the end of a gel tube projecting through a gland seal in a fixed bulkhead forming the upstream end of the chamber. The gel tube and mixer-cooler are mounted on a movable carriage, movement of which may be used to adjust the die with respect to shaping and calibrating equipment inside the chamber. The mixer-cooler achieves a selected narrow range of uniform viscosity of the melt at the die depending on the size of the product and density. The chamber is preferably a vacuum chamber producing low density foams. The product exits the chamber to atmosphere on a continuous basis through a submerged orifice in a water baffle immersion seal. The mixer-cooler enables a large size low density product to be produced with uniform cellular structure without cell collapse or density gradients, as the product is subjected to the pressure and temperature transformations passing from the chamber to atmosphere through the water. The seal includes the submerged orifice with a free wheeling guiding system upstream of the orifice. Immediately ahead of the guiding system, the parameters of the foam extrudate are sensed to control the configuration of the orifice on a continuous basis. Before the extrudate passes into the water baffle seal it moves over a floating dancer roll, the position of which controls a haul-off such as a vacuum belt at the tail end of the system. This avoids pushing on the extrudate.
摘要翻译：挤出系统使用单串联挤压机和混合器 - 冷却器来挤出可发泡挤出物通过可密封室中的模头。可发泡挤出物在室内成形和校准。模具安装在凝胶管的端部，该凝胶管通过形成腔室的上游端的固定隔板中的压盖密封件突出。凝胶管和混合器 - 冷却器安装在可移动的托架上，其运动可用于相对于腔室内的成型和校准设备来调节管芯。混合器 - 冷却器根据产品的尺寸和密度，在模具处获得熔体在模具上的均匀粘度的选定窄范围。该室优选是产生低密度泡沫的真空室。该产品通过水挡板浸入式密封件中的浸没孔口连续地离开室至大气。混合器 - 冷却器使得能够以均匀的蜂窝状结构生产大尺寸低密度产品，而不会产生电池塌陷或密度梯度，因为产品经受从室到大气通过水的压力和温度变换。密封件包括具有在孔口上游的自由转向引导系统的浸没孔口。立即在引导系统之前，感测泡沫挤出物的参数以连续地控制孔口的构造。在挤出物进入水挡板密封件之前，它在漂浮的浮动辊上移动，浮动浮动辊在其位置控制系统尾端处的牵引（例如真空带）。这避免了推挤挤出物。

3. 发明授权

US07312253B2 Insulating thermoplastic foams made with methyl formate-based blowing agents 有权
标题翻译：用甲酸甲酯发泡剂制成的绝热热塑性泡沫
公开(公告)号：US07312253B2
公开(公告)日：2007-12-25
申请号：US11016312
申请日：2004-12-17
申请人： Yash Paul Handa , Joseph A. Brackman , Glenn C. Castner , Mohammad Zafar
发明人： Yash Paul Handa , Joseph A. Brackman , Glenn C. Castner , Mohammad Zafar
IPC分类号： C08J9/00
CPC分类号： C08J9/127 , C08J9/149 , C08J2203/06 , C08J2203/12 , C08J2203/14 , C08J2203/142 , C08J2205/052 , C08J2325/04
摘要： A blowing agent blend for making thermoplastic polymer foams comprises methyl formate. The blowing agent blend can further comprise at least one co-blowing agent. The co-blowing agent is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The thermoplastic polymer foam can be an alkenyl aromatic polymer foam, e.g. a polystyrene foam. The blowing agent blend can comprise any combination of methyl formate and one or more co-blowing agents. The methyl formate-based blowing agent blends produce stable foams for various applications, including containers, packaging systems, as well as insulation boards and building materials. A process for the preparation of such foams is also provided.
摘要翻译：用于制备热塑性聚合物泡沫的发泡剂共混物包括甲酸甲酯。发泡剂共混物可以进一步包含至少一种共发泡剂。共发泡剂是物理共发泡剂（例如无机试剂，烃，卤代烃，具有极性的烃，官能团，水或其任何组合）或化学共吹代理或其组合。热塑性聚合物泡沫可以是烯基芳族聚合物泡沫，例如聚苯乙烯泡沫。发泡剂共混物可以包含甲酸甲酯和一种或多种共发泡剂的任何组合。基于甲酸甲酯的发泡剂混合物为各种应用产生稳定的泡沫，包括容器，包装系统以及绝缘板和建筑材料。还提供了制备这种泡沫体的方法。

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