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

Macromolecular Rapid Communications - Tập 39 Số 9 - 2018
Shuang Ma1, Huiyi Zhang1, R. Sablong1,2, Cor E. Koning3,1, Rolf A. T. M. van Benthem4,1
1Laboratory of Physical Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
2Polymer Technology Group Eindhoven B.V. (PTG/e B.V.), P.O. Box 6284, Eindhoven, 5600 HG, The Netherlands
3DSM Coating Resins Ceintuurbaan 5 Zwolle 8022 AW The Netherlands
4DSM Materials Science Center Urmonderbaan 22 Geleen 6167 RG The Netherlands

Tóm tắt

Abstractt‐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.

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Macromolecular Rapid Communications

Tập 39 Số 9

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