t‐Butyl‐Oxycarbonylated Diamines as Building Blocks for Isocyanate‐Free Polyurethane/Urea Dispersions and Coatings,Macromolecular Rapid Communications

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t‐Butyl‐Oxycarbonylated Diamines as Building Blocks for Isocyanate‐Free Polyurethane/Urea Dispersions and Coatings
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2018-03-08 , DOI: 10.1002/marc.201800004
Shuang Ma ₁ , Huiyi Zhang ₁ , Rafaël J. Sablong _{1,

2} , Cor E. Koning _{1,

3} , Rolf A. T. M. van Benthem _{1,

4}

Affiliation

t‐Butyl‐oxycarbonylated diamines (“di‐Boc‐carbamates”) are investigated as dicarbamate monomers for diamine/dicarbamate polymerizations. Polyureas (PUs) and polyurethanes (PURs) with high molecular weights are prepared from stoichiometric polymerizations of diamines or diols with N‐N′‐di‐t‐butyl‐oxycarbonyl isophorone diamine (DiBoc‐IPDC) using KOt‐Bu as a catalyst, while gelation is observed when an excess of DiBoc‐IPDC is used with respect to the diamines or diols. Stable dispersions are obtained from PUs and PURs with 3,3′‐diamino‐N‐methyldipropylamine (DMDPA) as internal dispersing agent. The corresponding PU‐based coatings exhibit superior mechanical properties and solvent resistances compared to the polyurethane urea coatings synthesized from diols, DiBoc‐IPDC, and DMDPA.

中文翻译：

叔丁基氧羰基化二胺作为不含异氰酸酯的聚氨酯/尿素分散体和涂料的基础材料

研究了叔丁基氧羰基化二胺（“ di-Boc-氨基甲酸酯”）作为二胺/二氨基甲酸酯聚合反应中的二氨基甲酸酯单体。聚脲（PU）和聚氨酯（PURS）具有高分子量由二胺或二醇的化学计量与聚合制备N-N' -二吨使用KO丁基-氧基羰基异佛尔酮二胺（DIBOC-IPDC）吨-Bu作为催化剂，而当相对于二胺或二醇使用过量的DiBoc-IPDC时，会观察到凝胶化。从具有3,3'-二氨基-N的PU和PUR中获得稳定的分散体-甲基二丙胺（DMDPA）作为内部分散剂。与由二醇，DiBoc-IPDC和DMDPA合成的聚氨酯脲涂料相比，相应的PU基涂料表现出优异的机械性能和耐溶剂性。

更新日期：2018-03-08

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