A kind of preparation method of high wet compressive strength molding sand binder material
A technology of binder material and wet compressive strength, which is applied in the field of preparation of high wet compressive strength molding sand binder materials, can solve the problems of poor drying performance and wet compressive strength, and limited use of binder materials, and achieve Reduce moisture absorption and improve dry tensile strength
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example 1
[0018] In parts by weight, weigh 45 parts of 90% ethanol solution by mass, 10 parts of monochloroacetic acid, 6 parts of sodium hydroxide, 10 parts of propylene oxide and 10 parts of cornstarch and put them in a mixer, stir and mix and collect the slurry , put the slurry in a three-necked flask, stir and mix and pass nitrogen to remove the air, control the nitrogen feeding amount to 25mL / min, after the feeding is completed, then heat the reaction for 6h under a nitrogen atmosphere at 55 ℃, stand and cool to At room temperature, adjust the pH to 6.5 with 1% hydrochloric acid, stir and mix and rinse with 90% absolute ethanol for 3 times, collect the emulsion, filter, and vacuum freeze-dry to obtain modified starch granules; take rapeseed meal and grind it through an 80-mesh sieve , get sieved particles and weigh 55 parts of deionized water, 15 parts of 200-mesh blast furnace slag, 25 parts of sieved particles, 10 parts of potassium permanganate, 25 parts of rapeseed oil, 6 parts ...
example 2
[0020] In parts by weight, weigh 47 parts of 90% ethanol solution by mass, 12 parts of monochloroacetic acid, 7 parts of sodium hydroxide, 12 parts of propylene oxide and 12 parts of cornstarch and put them in a mixer, stir and mix and collect the slurry , put the slurry in a three-necked flask, stir and mix and pass nitrogen to remove air, control the amount of nitrogen to be fed to 27mL / min, and after the pass is completed, keep the reaction in a nitrogen atmosphere at 57 ℃ for 7h, stand and cool to At room temperature, adjust the pH to 6.5 with 1% hydrochloric acid, stir and mix and rinse with 90% absolute ethanol for 4 times, collect the emulsion, filter, and vacuum freeze-dry to obtain modified starch granules; take rapeseed meal and grind it through an 80-mesh sieve , get sieved particles and weigh 57 parts of deionized water, 17 parts of 200-mesh blast furnace slag, 27 parts of sieved particles, 12 parts of potassium permanganate, 27 parts of rapeseed oil, 7 parts of pho...
example 3
[0022] In parts by weight, weigh 50 parts of 90% ethanol solution by mass, 15 parts of monochloroacetic acid, 8 parts of sodium hydroxide, 15 parts of propylene oxide and 15 parts of cornstarch and put them in a mixer, stir and mix and collect the slurry , put the slurry in a three-necked flask, stir and mix and pass nitrogen to remove air, control the amount of nitrogen to be fed to 30mL / min, after the pass is completed, then keep the reaction in a nitrogen atmosphere at 60 ° C for 8h, stand and cool to At room temperature, adjust the pH to 6.5 with a mass fraction of 1% hydrochloric acid, stir and mix and rinse with 90% mass fraction of anhydrous ethanol for 5 times, collect the emulsion, filter, and vacuum freeze-dry to obtain modified starch granules; take rapeseed meal and grind it through an 80-mesh sieve , get sieved particles and weigh 60 parts of deionized water, 20 parts of 200-mesh blast furnace slag, 30 parts of sieved particles, 15 parts of potassium permanganate, ...
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