化學(xué)配方數(shù)據(jù)庫(kù)
| 配方類(lèi)型： |
MISCELLANEOUS |
| 配方說(shuō)明： |
Epoxy Hardener |
| 配方組成： |
Epoxy Resin/40
Benzyl Alcohol/88
IPD/55
Physical Properties
Visc. @ 20 C (mPas)/615
Density @ 20 C (g/ml)/1.029
Salicylic Acid/12
Refractive Index/1.5309
TMD/45
Water Miscibility (vol. water:1 vol. hardener)/0.28:1 |
| 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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