A kind of preparation method of amino-modified acrylic resin composite microsphere
A technology of acrylic resin and composite microspheres, which is applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of no literature, reports, etc., and achieve the effects of good spherical regularity, increased opacity, and improved haze
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Embodiment 1
[0038] 1. Preparation of Nanoscale Amino Resin Particle Dispersion
[0039] Place a four-neck flask equipped with a stirrer, thermometer, reflux condenser and nitrogen tube in a super constant temperature water bath, add 100 parts of formaldehyde solution (concentration 37%), 50 parts of melamine, and adjust the pH of the system with 10% soda ash solution value to 8.5, the temperature was raised to 75°C, and the reaction was carried out for 40 minutes to obtain an amino resin prepolymer.
[0040] Add 800 parts of water to another reaction vessel, then add 10 parts of sodium succinyl sulfonate, stir and dissolve evenly, raise the temperature to 75°C, add amino resin prepolymer into it, stir and mix evenly, add 28 parts of 10% aminosulfonate The acid solution was heated to 85° C., and the polycondensation reaction was carried out for 3 hours to obtain a dispersion of nano-sized amino resin particles with a particle size of about 0.2 microns.
[0041]2. Preparation of amino-modi...
Embodiment 2
[0045] 1. Preparation of Nanoscale Amino Resin Particle Dispersion
[0046] Place a four-necked flask equipped with a stirrer, thermometer, reflux condenser and nitrogen pipe in a super constant temperature water bath, add 110 parts of formaldehyde solution (concentration 37%), 45 parts of melamine, 15 parts of benzomelamine, and use 10 parts % soda ash solution to adjust the pH value of the system to 8.8, raise the temperature to 75° C., and react for 60 minutes to obtain an amino resin prepolymer.
[0047] Add 800 parts of water to another reaction vessel, then add 10 parts of sodium succinyl sulfonate, stir and dissolve evenly, raise the temperature to 75°C, add amino resin prepolymer into it, stir and mix evenly, add 25 parts of 10% aminosulfonate The acid solution was heated to 85° C., and the polycondensation reaction was carried out for 3 hours to obtain a dispersion of nano-sized amino resin particles with a particle size of about 0.5 microns.
[0048] 2. Preparation ...
Embodiment 3
[0052] 1. Preparation of Nanoscale Amino Resin Particle Dispersion
[0053] Put a four-necked flask equipped with a stirrer, thermometer, reflux condenser and nitrogen tube in a super constant temperature water bath, add 96 parts of formaldehyde solution (concentration 37%), 5 parts of urea, 40 parts of melamine, and use 10% soda ash Adjust the pH value of the system to 8.5 with the solution, raise the temperature to 75° C., and react for 30 minutes to obtain an amino resin prepolymer.
[0054] Add 800 parts of water to another reaction vessel, then add 12 parts of sodium dodecylbenzenesulfonate, stir and dissolve evenly, raise the temperature to 75°C, add amino resin prepolymer into it, stir and mix evenly, add 30 parts of 10% The p-toluenesulfonic acid solution was heated to 85° C., and the polycondensation reaction was carried out for 3 hours to obtain a dispersion of nano-sized amino resin particles with a particle size of about 0.25 microns.
[0055] 2. Preparation of am...
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