Core-shell type (methyl)acrylate copolymer particle emulsion and preparation method thereof, and fabric deepening agent composition
An acrylate and copolymer technology, which is applied in the field of core-shell (meth)acrylate copolymer particle emulsion and its preparation and fabric darkening agent composition, can solve the problems of increasing processing difficulty and increasing energy consumption, and achieves Good emulsion stability, stable polymerization reaction, good emulsification effect
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[0038] In a more preferred embodiment, the preparation method of core-shell type (meth)acrylate copolymer particle emulsion of the present invention comprises the steps:
[0039] 1) Put the nuclear monomer mixture, silicon-containing emulsifier and water into a container, and mechanically stir for 0.5-2 hours to obtain a nuclear pre-emulsion;
[0040] 2) Put the shell monomer mixture, silicon-containing emulsifier and water into a container, and mechanically stir for 0.5-2 hours to obtain a shell pre-emulsion;
[0041] 3) adding a free radical initiator in an amount of 0.5-2% of the weight of the nuclear monomer to the nuclear pre-emulsion obtained in step 1), and reacting at a temperature of 50-100° C. for 0.5-3 hours to obtain a nuclear emulsion;
[0042] 4) Slowly drop the shell pre-emulsion and the free radical initiator with an amount of 0.5-2% of the weight of the shell monomer into the core emulsion, and the dropping time is 0.5-2 hours. Finish cooling to room temperat...
Embodiment 1
[0083] Add 15g methyl methacrylate, 1g acrylic acid, 2g allyl polyoxyethylene polyoxypropylene ether (molecular weight 500), 1.5g silicon-containing emulsifier 1 in a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser. , and 27.2g of deionized water, stirred and dissolved, then stirred at a high speed for 30min to obtain a nuclear pre-emulsion.
[0084] Add 6g of methyl acrylate, 13g of isobutyl acrylate, 4g of octyl methacrylate, 1.5g of acetoacetoxyethyl methacrylate, 1.5g of ethylene into a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser. Triethoxysilane-modified nano-silica, 4.5g vinyl-terminated polydimethylsiloxane (viscosity 800, 25°C, mpa.s), 3g allyl polyoxyethylene ether (molecular weight 300) 2.2 1 g of silicon-containing emulsifier 1 and 104 g of deionized water were stirred and dissolved, and stirred at high speed for 30 minutes to obtain a shell pre-emulsion.
[0085] The temperature of the core pre-...
Embodiment 2
[0088] Add 15g ethyl acrylate, 1.0g hydroxyethyl methacrylate, 6g allyl polyoxyethylene ether (molecular weight 500), 0.75g silicon-containing emulsifier in a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser 2 and 40.4g of deionized water, stirred to dissolve, and then stirred at high speed for 1 hour to obtain a nuclear pre-emulsion.
[0089] Add 15g butyl acrylate, 14g hexyl methacrylate, 4g heptyl acrylate, 2.5g vinyltriacetoxysilane modified nano silicon dioxide in the four-necked flask that stirrer, thermometer, reflux condenser tube are housed, 10g vinyl-terminated polymethylvinylsiloxane (viscosity 400, 25°C, mpa.s), 9g allyl polyoxypropylene ether (molecular weight 800), 3g glycidyl methacrylate, 1.6g silicon-containing emulsifier Agent 2 and 98g of deionized water were stirred and dissolved, and stirred at high speed for 30 minutes to obtain a shell pre-emulsion.
[0090] The temperature of the core pre-emulsion was raised to 75°C, and...
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