Modified waterborne acrylic coating, and preparation method and applications thereof
A technology of water-based acrylic acid and acrylic emulsion, applied in the direction of coating, can solve the problems of poor mechanical properties, limited application, high water absorption, and achieve the effects of improving mechanical properties, reducing water absorption, and improving stability
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[0029] The present invention also provides the preparation method of the modified water-based acrylic paint described in the above technical scheme, comprising the following steps:
[0030] The above components by weight are mixed to obtain the modified water-based acrylic paint.
[0031] The present invention has no special limitation on the mixing method of the components, and the mixing method well known to those skilled in the art can be adopted, specifically, such as shear dispersion. In the present invention, the rotational speed of the shear dispersion is preferably 11000-13000r / min, more preferably 11500-12500r / min, most preferably 12000r / min. The present invention does not have special limitation to the device of shearing dispersion, adopts the well-known shearing dispersion device of those skilled in the art to get final product, specifically, as high-speed shearing disperser.
[0032] The method for preparing the modified water-based acrylic paint in the present in...
Embodiment 1
[0040] A modified water-based acrylic paint comprises the following components in parts by weight: 390 parts of acrylic emulsion, 210 parts of titanium dioxide, 110 parts of modified silicon dioxide, 4 parts of polysilsesquioxane, 1 part of emulsifier diglycerol poly Propylene glycol ether, 0.3 parts of defoamer BYK-020, 210 parts of deionized water;
[0041] The preparation method of above-mentioned modified waterborne acrylic paint comprises:
[0042] The components of the above-mentioned parts by weight are put into a high-speed shear disperser, and are sheared and dispersed at 11000r / min to obtain a modified water-based acrylic paint.
[0043] Among them, the preparation method of polysilsesquioxane is as follows: in parts by weight: 2 parts of methyltrimethoxysilane and 20 parts of deionized are mixed under the conditions of rotating speed of 400r / min and temperature of 75°C constant temperature water bath 25min; then add 0.5 parts of sodium hydroxide solution with a con...
Embodiment 2
[0052] A modified water-based acrylic paint comprises the following components in parts by weight: 400 parts of modified acrylic emulsion, 220 parts of titanium dioxide, 120 parts of fumed nano silicon dioxide, 5 parts of polysilsesquioxane, 1 part of emulsifier Diglycerol polypropylene glycol ether, 0.8 parts of antifoaming agent polysiloxane, 220 parts of deionized water;
[0053] The preparation method of above-mentioned modified waterborne acrylic paint, comprises the following steps:
[0054] The components of the above-mentioned parts by weight are put into a high-speed shear disperser, and are sheared and dispersed at 12000r / min to obtain a modified water-based acrylic paint.
[0055] Among them, the preparation method of polysilsesquioxane is as follows: in parts by weight: 3 parts of methyltrimethoxysilane and 30 parts of deionized are mixed under the condition that the rotation speed is 450r / min and the temperature is a constant temperature water bath at 80°C 30min;...
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