聚氨酯水分散体合成用原材料选择

来源期刊：中南大学学报(自然科学版)1998年第2期

论文作者：李芝华 李国莱 尹志民 谢佑卿 章四琪

文章页码：95 - 98

关键词：聚氨酯;水分散液;胶膜;合成;原材料

Key words：polyurethane; dispersion; coating; synthesis; raw materials

摘    要：通过考察树脂水分散性、耐水性及力学性能等方面的特征,讨论了聚氨酯水分散体合成时原材料的选择.研究表明,合成中使用的聚酯二醇分子量(Mn)大小、合成预聚体时原材料的-NCO与-OH物质的量之比值(-NCO/-OH)、树脂中羰基含量、预聚体中-NCO与扩链剂中-NH₂物质的量之比值(-NCO/-NH₂)、中和度对聚氨酯水分散体及胶膜性能具有很重要的影响.

Abstract: Based on water dispersity,water resistance and mechanical properties of polyurethane resin,raw material selection in the synthesis of polyurethane dispersion was discussed in this paper.The result indicated that the synthesis of polyurethane dispersion and properties of its film were effected significantly by the factors such as molecular weight of polyester glyools,-NCO/-OH,the content of -COOH,-NCO/-NH₂,degree of neutralization,etc.