1,3-Bis(isocyanatomethyl)benzene → Trimethylolpropane

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Reaction Steps

As the oil phase component, 10 g of trimethylolpropane and xylene diisocyanate adduct (Takenate D-110N, produced by Mitsui Takeda Chemicals, Inc., a 75 mass % ethyl acetate solution) and 0.12 g of Pionin A41C (produced by Takemoto Yushi Co., Ltd.) were dissolved in 16.67 g of ethyl acetate. As the aqueous phase component, 37.5 g of an aqueous 4 mass % PVA-205 solution was prepared. The oil phase component and the aqueous phase component were mixed and emulsified in a homogenizer at 12,000 rpm for 10 minutes. The resulting emulsified product was added to 25 g of distilled water and the obtained mixture was stirred at room temperature for 30 minutes and then stirred at 40° C. for 2 hours. The thus-obtained microcapsule solution was diluted with distilled water to a solid content concentration of 15 mass %. The average particle diameter was 0.2 μm.

Provenance & Evidence