Silicone-acrylic emulsion for base paint for multicolor coating, and preparation method thereof
A kind of colorful, silicone-acrylic emulsion technology, applied in coating and other directions, can solve the problems of cumbersome preparation process of silicone-acrylic emulsion, poor weather resistance and poor water whitening resistance of silicone-acrylic emulsion, and is helpful for product promotion and application. , The effect of promoting utilization and stable wetting performance
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Embodiment 1
[0033] 1) At room temperature, mix 4430kg methyl methacrylate, 5527kg n-butyl acrylate, 2010kg isooctyl acrylate, 80kg sodium lauryl sulfate, 50kg acrylic acid, 3800kg deionized water and pre-emulsify after stirring for 30 minutes , to get the first component;
[0034] 2) Mix 8200kg of deionized water, 18kg of sodium nonylphenol polyoxyethylene ether sulfate (70% active ingredient), 30kg of sodium bicarbonate and 15kg of potassium persulfate to obtain the second component;
[0035] 3) heating up to 85° C., adding 300 kg of the first component dropwise to the second component to obtain the first reaction product, and controlling the dropping rate to 40 kg / h;
[0036] 4) Keep the temperature at 85°C, add 100kg of vinyltrimethoxysilane dropwise to the remaining first component, then continue to add the first component dropwise, control the dropping rate of the two processes to 40kg / h, and keep the temperature constant for 3h after the dropping Afterwards, obtain the second react...
Embodiment 2
[0039] 1) At room temperature, 4130kg methyl methacrylate, 5620kg n-butyl acrylate, 2110kg isooctyl acrylate, 75kg sodium dodecylbenzenesulfonate, 55kg methacrylic acid, 3800kg deionized water were mixed and stirred before pre-emulsification, Stirring time is 35min, obtains the first component;
[0040] 2) 8100kg deionized water, 18kg fatty alcohol polyoxyethylene ether potassium phosphate, 30kg PH sodium bicarbonate and 15kg ammonium persulfate were mixed to obtain the second component;
[0041] 3) heating up to 88° C., adding 300 kg of the first component dropwise to the second component to obtain the first reaction product, and controlling the dropping rate to 40 kg / h;
[0042]4) Keep the temperature at 88°C, add 105kg of γ-methacryloxypropyltrimethoxysilane dropwise to the remaining first component, then continue to add the first component dropwise, and control the dropping rate of the two processes to 40kg / h , after the dropwise addition and constant temperature for 3h, ...
Embodiment 3
[0045] 1) At room temperature, mix 4500kg methyl methacrylate, 5400kg n-butyl acrylate, 2210kg isooctyl acrylate, 76kg sodium nonylphenol polyoxyethylene ether sulfate, 60kg itaconic acid, and 3800kg deionized water to prepare Emulsification, stirring time is 30-40min, to obtain the first component;
[0046] 2) Mix 8400kg deionized water, 18kg sodium dodecylsulfonate, 30kg sodium bicarbonate and 15kg sodium persulfate to obtain the second component;
[0047] 3) heating up to 82°C, adding dropwise 300kg of the first component to the second component to obtain the first reaction product, and controlling the dropping rate to 40kg / h;
[0048] 4) Keep the temperature at 82°C, add 95kg of γ-methacryloxypropyltrimethoxysilane dropwise to the remaining first component, then continue to add the first component dropwise, and control the dropping rate of the two processes to 40kg / h , after the dropwise addition and constant temperature for 3h, the second reaction product was obtained; ...
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