Epoxy Resin/40 Benzyl Alcohol/88 IPD/- Physical Properties Visc. @ 20 C (mPa's)/340 Density @ 20 C (g/ml)/1.017 Salicylic Acid/12 Refractive Index/1.5225 TMD/100 Water Miscibility (vol. water:1 vol. hardener)/0.35:1
配制方法:
These hardener blends can easily be prepared by dissolving salicylic acid (accelerator) in benzyl alcohol (or methylbenzyl alcohol) and finally adding IPD or TMD or a blend of both. For the formulation of the so-called "in-situ adducts," an epoxy resin is reacted with a considerable excess of amine hardener. In this case the epoxy resin is added drop by drop while stirring and finally stirred for an additional 2 h. The production of blends is accompanied by a slight evolution of heat. The reaction should be controlled in order not to exceed 100 C. In these blends the benzyl (or methylbenzyl) alcohol acts as a solvent for the accelerator (salicylic acid) and furthermore flexibilizes the resin/hardener system, since it does not evaporate and remains in the film after curing.
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