A preparation method of epoxy soybean oil modified low shrinkage sheet molding compound
A technology of epoxidized soybean oil and sheet molding compound, which is applied in the field of polymer material preparation, can solve the problems of micro-cracks, bubbles, pinholes, high curing shrinkage, low shrinkage and the like on the surface of sheet molding compound. Achieve low curing shrinkage, high surface smoothness, good fluidity and filling performance
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example 1
[0019] First, weigh 85 parts of epoxidized soybean oil, 2 parts of p-chlorophenylboronic acid, 3 parts of polyvinyl alcohol and 10 parts of propylene glycol in a three-necked flask, stir and mix them, and place them in a constant temperature water bath at 0.3 MPa and 85°C. Heat for 2 hours; after the water bath heating is completed, stop heating and let it stand to cool to 30°C, then add dropwise a 15% sodium hydroxide solution to adjust its pH to 8.5, stir and mix, and place it in a water bath to heat at 60°C 30min, then stop heating and vacuum distillation, collect the residual liquid remaining after vacuum distillation and suction filtration, collect the filtrate to prepare epoxy soybean modified alcohol, for subsequent use; then measure 30 Parts of phthalic anhydride, 10 parts of maleic anhydride, 15 parts of dicyclopentadiene, 10 parts of epoxy soybean modified alcohol prepared above and 35 parts of deionized water are placed in a four-necked flask, and then under nitrogen...
example 2
[0021] First, weigh 75 parts of epoxidized soybean oil, 3 parts of p-chlorophenylboronic acid, 7 parts of polyvinyl alcohol and 15 parts of propylene glycol in a three-necked flask, stir and mix them, and place them in a constant temperature water bath at 0.2MPa and 70°C. Heat for 1 hour; after the water bath heating is completed, stop heating and let it stand to cool to 20°C, then add dropwise a 15% sodium hydroxide solution to adjust its pH to 8.5, stir and mix, and place it in a water bath to heat at 45°C 15min, then stop heating and vacuum distillation, collect the residual liquid remaining after vacuum distillation and suction filtration, collect the filtrate to prepare epoxy soybean modified alcohol, for subsequent use; then measure 10 parts by weight respectively Parts of phthalic anhydride, 15 parts of maleic anhydride, 20 parts of dicyclopentadiene, 15 parts of epoxy soybean modified alcohol prepared above and 40 parts of deionized water are placed in a four-necked fla...
example 3
[0023]First, weigh 80 parts of epoxidized soybean oil, 2 parts of p-chlorophenylboronic acid, 7 parts of polyvinyl alcohol and 11 parts of propylene glycol in a three-necked flask, stir and mix them, and place them in a constant temperature water bath at 0.3 MPa and 80 °C. Heat for 2 hours; after the water bath heating is completed, stop heating and let it stand to cool to 25°C, then add dropwise a 15% sodium hydroxide solution, adjust its pH to 8.5, stir and mix, and place it in a water bath at 50°C for heating 20min, then stop heating and vacuum distillation, collect the residual liquid remaining after vacuum distillation and suction filtration, collect the filtrate to prepare epoxy soybean modified alcohol, for subsequent use; then measure 20 Parts of phthalic anhydride, 10 parts of maleic anhydride, 20 parts of dicyclopentadiene, 10 parts of epoxy soybean modified alcohol prepared above and 40 parts of deionized water are placed in a four-necked flask, and then under nitrog...
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