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    • 27. 发明申请
    • Extruded Polystyrene Foam Containing Propylene Carbonate, Ethylene Carbonate or Butylene Carbonate as a Process Aids
    • 包含碳酸丙烯酯,碳酸亚乙酯或碳酸亚丁酯作为加工助剂的挤出聚苯乙烯泡沫
    • US20110144221A1
    • 2011-06-16
    • US12996032
    • 2008-06-04
    • Yadollah DelavizRaymond Marshall BreindelMitchell Z. Weekley
    • Yadollah DelavizRaymond Marshall BreindelMitchell Z. Weekley
    • C08J9/00B82Y30/00
    • C08J9/0066C08J9/0014C08J9/0061C08J9/0071C08J9/12C08J2201/03C08J2203/142C08J2205/052C08J2325/04C08J2495/00
    • Polymeric foam and polymeric foam products that contain a foamable polymer material, at least one hydrofluorocarbon (HFC) blowing agent, an infrared attenuating agent such as nanographite, and propylene carbonate, ethylene carbonate, or butylene carbonate as a process additive are provided. In one or more embodiments, the HFC blowing agent is 1,1-difluoroethane (HFC-152a), 1,1,1,2-tetrafluoroethane (HFC-134a), or a combination of 1,1-difluoroethane (HFC-152a) and 1,1,1,2-tetrafluoroethane (HFC-134a). The propylene carbonate, ethylene carbonate, or butylene carbonate acts as a cell enlarger to increase the average cell size of the foamed product, as a process aid, as a plasticizer, and lowers the die pressure. The inventive foam composition produces extruded foams that have insulation values (R-values) that are equal to or better than conventional extruded, closed cell foams produced with 1-chloro-1,1-difluoroethane (HCFC-142b). In exemplary embodiments, less than 4% of the cells are open cells. A method of forming an extruded foam product is also provided.
    • 提供含有可发泡聚合物材料,至少一种氢氟烃(HFC)发泡剂,红外衰减剂如纳米石墨和碳酸亚丙酯,碳酸亚乙酯或碳酸亚丁酯作为加工添加剂的聚合物泡沫和聚合物泡沫产品。 在一个或多个实施方案中,HFC发泡剂是1,1-二氟乙烷(HFC-152a),1,1,1,2-四氟乙烷(HFC-134a)或1,1-二氟乙烷(HFC-152a )和1,1,1,2-四氟乙烷(HFC-134a)。 碳酸亚丙酯,碳酸亚乙酯或碳酸亚丁酯充当电池放大器,以增加发泡产品的平均泡孔尺寸作为加工助剂作为增塑剂,并降低模具压力。 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)生产的常规挤出的闭孔泡沫的绝缘值(R值)的挤出泡沫。 在示例性实施例中,小于4%的细胞是开放细胞。 还提供了一种形成挤出泡沫产品的方法。