Preparation method of low-furfuryl-alcohol-content high-strength furan resin
A furan resin, high-strength technology, applied in the field of preparation of high-strength furan resin, can solve the problems of sand mold collapse, resin high-temperature performance surplus, regeneration difficulties, etc., to achieve the effect of improving high-temperature collapse and reducing casting costs
Active Publication Date: 2016-06-15
GANSU KOCEL CHEM
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Abstract
The invention provides a preparation method of a low-furfuryl-alcohol-content high-strength furan resin. The preparation method comprises the following steps: uniformly mixing and stirring furfuryl alcohol and a coupling agent, and reacting at certain temperature for a first time period to generate a furfuryl alcohol small-molecule prepolymer; in a reaction vessel, carrying out addition reaction on urea and formaldehyde; after the addition reaction finishes, adding the furfuryl alcohol small-molecule prepolymer which accounts for one third of the total furfuryl alcohol, shutting down the steam, and stirring and cooling for a second time period; cooling, adding the rest of furfuryl alcohol small-molecule prepolymer, and stirring uniformly; and adding a solvent for dilution, cooling to normal temperature, and discharging. On the premise of lowering the furfuryl alcohol content of the furan resin, a special technique is utilized to keep the normal-temperature strength of the resin product unchanged, thereby lowering the casting cost and enhancing the high-temperature collapsibility of the resin sand mold.
Technology Topic
SolventPrepolymer +7
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PUM
Property | Measurement | Unit |
Strength | 1.8 | mPa |
Strength | 2.0 | mPa |
Strength | 2.1 | mPa |
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