The adhesive of the present invention includes latexes with an adhesion promoter which is preferably polyamidoamine. The addition of the polyamidoamine improves the adhesive strength between substrates such as between two plastic films or between a plastic film and paperboard. The present invention also relates to an adhesive prepared from a latex which is neutralized with a particular base and a hydrophobic polyamidoamine having particular amine values and viscosity whereby the strength of the adhesive bond is increased in humid conditions. The present invention also relates to an adhesive which is stable in the presence of water containing high levels of ions.
本发明的粘合剂包括含有粘合
促进剂的胶乳,粘合
促进剂最好是聚
氨基胺。添加聚
氨基胺可提高基材之间的粘合强度,如两层塑料薄膜之间或塑料薄膜与纸板之间的粘合强度。本发明还涉及一种用胶乳制备的粘合剂,该胶乳用特定的碱和具有特定胺值和粘度的疏
水性聚
氨基胺中和,从而在
潮湿条件下提高了粘合强度。本发明还涉及一种在含有大量离子的
水中也能保持稳定的粘合剂。