高成膜强度阴离子聚氨酯水乳液的研制与生产

Preparation of Anion PU Emulsion Featuring Higher Film Strength

讨论了影响阴离于聚氨酯水乳液生产和物理性能的几个因素，得出以下结论：合成工艺为预聚、中和、乳化、扩链、NCO／OH值1．3至1．8，羧基含量≥1．6％和交联剂用量1．5％至2．5％时，可以制备稳定的和具有较高膜强度的聚氨酯水乳液。

Several factors effecting the physical properties and production of anion PU aquoemulsion are discussed, PU aquo-emulsions with storing stability and higher strength was prepared by properly processes of prepolymerizing, neutralizing, emulsifing and chain-extending. In this preparation,NCO/OH ratio is 1. 3~ 1. 8, carboxyl content is 1. 6% or more and amount of crosslinking agent is 1. 5 % ~2. 5 % .