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Chemistry and Industry of Forest Products ›› 2016, Vol. 36 ›› Issue (5): 68-74.doi: 10.3969/j.issn.0253-2417.2016.05.010

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Preparation, Characterization and Micro-structure of Anionic Polysiloxane Modified Terpene-based Epoxy Resin Polyol Dispersion

LIU Di1, WU Guo-min1,2, LIU Gui-feng1,2, KONG Zhen-wu1,2   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    2. Research Institute of Forestry New Technology, CAF, Beijing 100091, China
  • Received:2015-12-23 Online:2016-10-25 Published:2016-11-05

Abstract: Terpene-based epoxy resin polyol (T-N) was prepared via the reaction of terpene-based epoxy resin(TME) and neopentyl glycol(NPG). Then the T-N was modified with hydroxypropyl terminated polysiloxane(HTP), 2,4 tolylene diisocyanate(TDI) and 2,2-bis (hydroxymethyl) propionic acid(DMPA) to obtain the anionic polysiloxane-modified terpene-based epoxy resin polyol (T-N-S) dispersion. The chemical structure of the T-N-S was characterized by FT-IR and NMR. The micro-morphology of T-N-S was determined by transmission electron microscopy (TEM) and particles size measurement. And the effects of reaction condition and siloxane content on the stability and micro-structure of the polyol dispersion were studied. T-N-S dispersion was obtained at the conditions of DMPA and TDI were mixed with the molar ratio 1:2 in the presence of solvent acetone (the amount of solvent was 1.5-2 times based on the reactants mass) and refluxed at 56℃ for 3 h. Then HTP and T-N were added in to the reaction and continued to feflux for 4 h. The obtained T-N-S dispersion showed good stability and the particle size of the dispersion ranged from 100 to 300 nm when the dosage of HTP was 3%-12% of T-N by weight.

Key words: terpene-based epoxy resin, hydroxypropyl terminated polysiloxane, polyol dispersion, micro-structure

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