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首页> 外文期刊>Journal of Applied Polymer Science >Introduction of Covalently Bonded Phosphorus into Aqueous-Basedf Polyurethane System via Postcuring Reaction
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Introduction of Covalently Bonded Phosphorus into Aqueous-Basedf Polyurethane System via Postcuring Reaction

机译：通过后固化反应将共价键合的磷引入水基聚氨酯体系

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摘要

Anionic aqueous-based polyurethane (PU) dispersions were derived from a water dispersion process of carboxylic groups containing PU prepolymers together with a neutralization and a chain extension.These PU prepolymers were prepared from a conventional polyaddition of isophorone diisocyanate,polypropylene glycol-1000,and dimethylolpropanic acid.A covalently bonded phosphorus was introduced into PU by a phosporus-containing curing agent.A series of phosphorus and multi-aziridinyl groups containing curing agents were synthesized for this purpose.Each of them served in a dual-function capacity as a postcuring agent for the anionic aqueous-based PU system.The resulting postcured PU exhibited improvements in its mechanical,physical,and thermal properties;furthermore,postcured PU synergistic flame inhibition was also observe due to the presence of nitrogen and phosphorus content in the process.
机译：阴离子型水性聚氨酯（PU）分散体是通过含羧基的PU预聚物的水分散过程以及中和和扩链反应而得到的。这些PU预聚物是由异佛尔酮二异氰酸酯，聚丙二醇1000和二羟甲基丙酸：通过含磷的固化剂将共价键合的磷引入到PU中，为此目的合成了一系列含磷和多叠氮基的固化剂，它们各自具有双重功能，可作为后固化剂所得的后固化PU在机械，物理和热性能方面均表现出改善;此外，由于该过程中存在氮和磷，因此还观察到了后固化PU协同阻燃作用。

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