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    • 10. 发明授权
    • Continuous two-stage preparation of solvent-free polyacrylate hotmelt PSAs
    • 无溶剂聚丙烯酸酯热熔体PSA的连续两阶段制备
    • US06881442B2
    • 2005-04-19
    • US10436864
    • 2003-05-13
    • Marc HusemannStephan ZöllnerKlaus MassowFrank Henke
    • Marc HusemannStephan ZöllnerKlaus MassowFrank Henke
    • C08F6/10C09J7/02C09J133/08C09J133/06
    • C09J133/08C08F6/10C09J7/385C09J2201/122C09J2201/134Y10S526/931Y10S526/935C08L33/08
    • In a continuous two-stage process for preparing solvent-free polyacrylate hotmelt pressure sensitive adhesives which is gentle on the polymer and redeploys the solvent used in the process the following steps are carried out: polymerizing a self-adhesive pressure sensitive adhesive in solution, the solvent having a low vapor pressure; continuously mixing the polymer solution with antioxidants and preheating the mixture under superatmospheric pressure without boiling it; concentrating the polymer solution to a residual solvent content of less than 0.1% by weight in a concentrating extruder under the effect of reduced pressure and elevated temperatures; condensing, collecting, and re-using the solvent stripped off in the extruder; compounding the abovementioned solvent-freed hotmelt pressure sensitive adhesive with tackifying resins, fillers, stabilizers, crosslinkers or other additives in a second extruder at a moderate melt temperature; transferring the blended solvent-free self-adhesive pressure sensitive adhesive to a downstream coating unit.
    • 在制备无溶剂的聚丙烯酸酯热熔压敏粘合剂的连续两阶段方法中,该粘合剂在聚合物上温和并重新部署该方法中使用的溶剂,进行以下步骤:在溶液中聚合自粘压敏粘合剂, 溶剂蒸气压低; 将聚合物溶液与抗氧化剂连续混合,并在超大气压下预热混合物而不煮沸; 在浓缩挤出机中在减压和升高的温度下将聚合物溶液浓缩至小于0.1重量%的残留溶剂含量; 冷凝,收集和重新使用在挤出机中剥离的溶剂; 在第二挤出机中以适度的熔融温度将上述溶剂自由热熔压敏粘合剂与增粘树脂,填料,稳定剂,交联剂或其它添加剂混合; 将混合无溶剂的自粘合压敏粘合剂转移到下游涂布单元。