Process for producing foam by monitoring key process parameters
    2.
    发明授权
    Process for producing foam by monitoring key process parameters 有权
    通过监测关键工艺参数生产泡沫的方法

    公开(公告)号:US6093352A

    公开(公告)日:2000-07-25

    申请号:US154067

    申请日:1998-09-16

    IPC分类号: C08J9/00 C08J9/12 B29C44/20

    摘要: In one embodiment, the present invention relates to a process for preparing a foam product including the steps of (A) forming a foamable mixture of (1) an alkenyl aromatic polymer and (2) a blowing agent under a pressure sufficient to prevent prefoaming of the mixture and (B) foaming the mixture into a region of reduced pressure to form the foam product, wherein the difference between the glass transition temperature of the foamable mixture and the foaming temperature is less than about 62.degree. C.

    摘要翻译: 在一个实施方案中,本发明涉及一种制备泡沫产品的方法,包括以下步骤:(A)在足以防止预发泡的压力的压力下形成(1)链烯基芳族聚合物和(2)发泡剂的可发泡混合物 混合物和(B)将混合物发泡到减压区域以形成泡沫产品,其中可发泡混合物的玻璃化转变温度与发泡温度之差小于约62℃

    Process for producing extruded foam products with higher levels of CO2 as a blowing agent
    4.
    发明授权
    Process for producing extruded foam products with higher levels of CO2 as a blowing agent 有权
    用于生产具有较高水平的二氧化碳作为发泡剂的挤出泡沫产品的方法

    公开(公告)号:US06187831B1

    公开(公告)日:2001-02-13

    申请号:US09154288

    申请日:1998-09-16

    IPC分类号: C08J914

    摘要: In one embodiment, the present invention relates to a process for preparing a foam product involving the steps of (A) forming a foamable mixture of (1) a polymer comprising about 10% to about 90% monomers of at least one of meta-substituted styrene and para-substituted styrene and 0% to about 90% monomers of styrene, and (2) a blowing agent containing a major amount of carbon dioxide under a pressure sufficient to prevent prefoaming of the mixture and (B) foaming the mixture into a region of reduced pressure to form the foam product.

    摘要翻译: 在一个实施方案中,本发明涉及一种制备泡沫产品的方法,该方法涉及以下步骤:(A)形成(1)包含约10%至约90%的至少一种间位取代的单体的聚合物的可发泡混合物 苯乙烯和对位取代的苯乙烯和0%至约90%的苯乙烯单体,和(2)在足以防止混合物预发泡的压力下含有主要量的二氧化碳的发泡剂和(B)将混合物发泡成 减压区域以形成泡沫产品。

    Cell size enlargers for polystyrene foams
    5.
    发明申请
    Cell size enlargers for polystyrene foams 有权
    聚苯乙烯泡沫的泡孔尺寸放大器

    公开(公告)号:US20070299152A1

    公开(公告)日:2007-12-27

    申请号:US11472772

    申请日:2006-06-22

    IPC分类号: C08J9/00

    摘要: Polymer extruded foams that contain cell size enlarging agents are provided. The inventive composition includes a foamable polymer material, at least one blowing agent, and at least one cell size enlarging agent. The blowing agent utilized in the inventive composition is preferably selected such that the composition has a zero ozone depletion and low global warming potential. Examples include any inorganic blowing agents and/or non-hydrogenated chlorofluorocarbons (non-HCFCs). The foamable polymer material is preferably polystyrene. The cell size enlarging agent may be chosen from ethylene vinyl acetate (EVA) and/or ethylene methyl acrylate (EMA). The cell size enlarging agent permits the formation of a foam with large cell sizes that are desirable to achieve a high insulation value and to optimize the physical properties of the foamed product. In addition, the cell size enlarging agent provides an increased cell size to the foamed product without detracting from the physical and thermal properties.

    摘要翻译: 提供了含有电池尺寸扩大剂的聚合物挤出泡沫体。 本发明的组合物包括可发泡聚合物材料,至少一种发泡剂和至少一种细胞尺寸扩大剂。 本发明组合物中使用的发泡剂优选地选择成使得组合物具有零臭氧消耗和低的全球变暖潜能。 实例包括任何无机发泡剂和/或非氢化氯氟烃(非HCFC)。 可发泡聚合物材料优选为聚苯乙烯。 电池尺寸扩大剂可以选自乙烯乙酸乙烯酯(EVA)和/或乙烯丙烯酸甲酯(EMA)。 电池尺寸扩大剂允许形成具有大电池尺寸的泡沫,这是希望达到高绝缘值并优化发泡产品的物理性能的泡沫。 此外,电池尺寸扩大剂为发泡产品提供增加的电池尺寸,而不会降低物理和热性能。

    Polystyrene foams incorporating nanographite and HFC-134
    6.
    发明申请
    Polystyrene foams incorporating nanographite and HFC-134 审中-公开
    掺有纳米石墨和HFC-134的聚苯乙烯泡沫

    公开(公告)号:US20080242752A1

    公开(公告)日:2008-10-02

    申请号:US11729157

    申请日:2007-03-28

    IPC分类号: C08J9/00 C08F14/00

    摘要: Polymeric foam and polymeric foam products that contain a foamable polymer material, nanographite, and 1,1,2,2-tetrafluoroethane (HFC-134) are provided. Preferably, the foamable polymer material is an alkenyl aromatic polymer material. The foam is free of other conventional blowing agents typically utilized in preparing a foamed product. The nanographite is not chemically or surface modified and is preferably compounded in a polyethylene methyl acrylate copolymer (EMA), which is used both as a medium and a carrier for the nanographite. The nanographite may be compounded in the polymer in an amount up to 60% loading. In addition, the nanographite acts as a nucleating agent, R-value enhancer, infrared attenuating agent, lubricant, UV absorber, and process aid. The inventive foam composition produces extruded foams that have R-values that are equal to or better than conventional extruded foams produced with 1-chloro-1,1-difluoroethane (HCFC-142b). The foamed products are desirably made by a conventional extrusion process.

    摘要翻译: 提供含有可发泡聚合物材料,纳米石墨和1,1,2,2-四氟乙烷(HFC-134)的聚合物泡沫和聚合物泡沫产品。 优选地,可发泡聚合物材料是烯基芳族聚合物材料。 泡沫不含通常用于制备发泡产品的常规发泡剂。 纳米尺度不是化学或表面改性的,并且优选在聚丙烯酸甲酯共​​聚物(EMA)中复合,聚乙烯甲基丙烯酸甲酯共​​聚物(EMA)既用作纳米尺度的介质和载体。 纳米尺度可以以高达60%的载量的量混合在聚合物中。 此外,nanographite作为成核剂,R值增强剂,红外衰减剂,润滑剂,UV吸收剂和加工助剂。 本发明的泡沫组合物产生具有等于或优于用1-氯-1,1-二氟乙烷(HCFC-142b)生产的常规挤出泡沫的R值的挤出泡沫。 发泡产品希望通过常规挤出方法制成。

    Polystyrene/polyethylene oxide copolymer for enhancing water vapor permeability in thermoplastic foam
    7.
    发明授权
    Polystyrene/polyethylene oxide copolymer for enhancing water vapor permeability in thermoplastic foam 有权
    聚苯乙烯/聚环氧乙烷共聚物,用于提高热塑性泡沫塑料中的水蒸气渗透性

    公开(公告)号:US08754143B2

    公开(公告)日:2014-06-17

    申请号:US13769647

    申请日:2013-02-18

    IPC分类号: B22C1/22 C08J9/00

    摘要: Polymeric foam and polymeric foam products that contain a foamable polymer material, at least one blowing agent, a polystyrene/polyethylene oxide copolymer, and optionally, an infrared attenuating agent, are provided. In exemplary embodiments, the blowing agent includes at least one hydrofluorocarbon blowing agent. The maleic anhydride-styrene copolymer grafted with polyethylene oxide provides a water vapor permeability of 1.1 perm inch or greater in the extruded foam product without detrimentally affecting physical or thermal properties of the product. Additionally, the copolymer of maleic anhydride-styrene grafted with polyethylene oxide has a positive affect on the processability of the blowing agent(s) in the composition by both widening the process window and enhancing the solubility of the blowing agent in the polymer melt. Thus, the polystyrene/polyethylene oxide copolymer present in the inventive composition acts as a cell enlarger, a plasticizer, and a processing aid. A method of forming an extruded foam product is also provided.

    摘要翻译: 提供含有可发泡聚合物材料,至少一种发泡剂,聚苯乙烯/聚环氧乙烷共聚物和任选的红外衰减剂的聚合物泡沫和聚合泡沫产品。 在示例性实施方案中,发泡剂包括至少一种氢氟烃发泡剂。 用聚环氧乙烷接枝的马来酸酐 - 苯乙烯共聚物在挤出的泡沫产品中提供1.1 perm英寸或更大的水蒸汽透过率,而不会有害地影响产品的物理或热性能。 此外,接枝聚环氧乙烷的马来酸酐 - 苯乙烯的共聚物通过加工工艺窗口和提高发泡剂在聚合物熔体中的溶解度而对组合物中的发泡剂的加工性具有积极的影响。 因此,存在于本发明组合物中的聚苯乙烯/聚环氧乙烷共聚物用作电池放大器,增塑剂和加工助剂。 还提供了一种形成挤出泡沫产品的方法。

    Polystyrene/polyethylene oxide copolymer for enhancing water vapor permeability in thermoplastic foam
    9.
    发明授权
    Polystyrene/polyethylene oxide copolymer for enhancing water vapor permeability in thermoplastic foam 有权
    聚苯乙烯/聚环氧乙烷共聚物,用于提高热塑性泡沫塑料中的水蒸气渗透性

    公开(公告)号:US08378001B2

    公开(公告)日:2013-02-19

    申请号:US12696634

    申请日:2010-01-29

    IPC分类号: B22C1/22

    摘要: Polymeric foam and polymeric foam products that contain a foamable polymer material, at least one blowing agent, a polystyrene/polyethylene oxide copolymer, and optionally, an infrared attenuating agent, are provided. In exemplary embodiments, the blowing agent includes at least one hydrofluorocarbon blowing agent. The maleic anhydride-styrene copolymer grafted with polyethylene oxide provides a water vapor permeability of 1.1 perm inch or greater in the extruded foam product without detrimentally affecting physical or thermal properties of the product. Additionally, the copolymer of maleic anhydride-styrene grafted with polyethylene oxide has a positive affect on the processability of the blowing agent(s) in the composition by both widening the process window and enhancing the solubility of the blowing agent in the polymer melt. Thus, the polystyrene/polyethylene oxide copolymer present in the inventive composition acts as a cell enlarger, a plasticizer, and a processing aid. A method of forming an extruded foam product is also provided.

    摘要翻译: 提供含有可发泡聚合物材料,至少一种发泡剂,聚苯乙烯/聚环氧乙烷共聚物和任选的红外衰减剂的聚合物泡沫和聚合泡沫产品。 在示例性实施方案中,发泡剂包括至少一种氢氟烃发泡剂。 用聚环氧乙烷接枝的马来酸酐 - 苯乙烯共聚物在挤出的泡沫产品中提供1.1 perm英寸或更大的水蒸汽透过率,而不会有害地影响产品的物理或热性能。 此外,接枝聚环氧乙烷的马来酸酐 - 苯乙烯的共聚物通过加工工艺窗口和提高发泡剂在聚合物熔体中的溶解度而对组合物中的发泡剂的加工性具有积极的影响。 因此,存在于本发明组合物中的聚苯乙烯/聚环氧乙烷共聚物用作电池放大器,增塑剂和加工助剂。 还提供了一种形成挤出泡沫产品的方法。