Thermochromic compounding agent microcapsule suspension liquid for vulcanization of synthetic latex, and preparation method of thermochromic compounding agent microcapsule suspension liquid
A microcapsule suspension and synthetic latex technology, which is applied in the direction of microcapsule preparation, microsphere preparation, etc., can solve the problems of early vulcanization, latex stability or quality decline, etc., achieve simple steps, avoid latex stability decline, and facilitate industrial production Effect
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[0040] The present invention provides the preparation method of microcapsule suspension described in above-mentioned scheme, comprises the following steps:
[0041] Melting solid paraffin to obtain molten paraffin;
[0042] Mix the vulcanization compounding agent with molten paraffin, and the molten paraffin wraps the vulcanization compounding agent to obtain microcapsules as the oil phase;
[0043] Mix the emulsifier and water at 80-95°C to obtain a water phase;
[0044] The oil phase is added into the water phase to obtain an oil-in-water emulsion, and after cooling, a heat-induced compounding agent microcapsule suspension for synthetic latex vulcanization is obtained.
[0045] The invention melts solid paraffin to obtain molten paraffin. In the present invention, the melting temperature is preferably 80-95° C., more preferably 85-90° C.; the melting time is preferably 0.2-1 h, more preferably 0.4-0.6 h. In the present invention, the solid paraffin is preferably melted un...
Embodiment 1
[0055] Put zinc oxide into a ball mill and grind for 72 hours to prepare a zinc oxide dispersion with a solid content of 50% for use;
[0056] Put 100 g of fully refined paraffin into a three-neck flask equipped with a condenser, then raise the temperature to 95° C., melt the paraffin for 30 minutes, and stir at a speed of 300 rpm to obtain molten paraffin;
[0057] Pour 100 g of the zinc oxide dispersion into molten paraffin, and stir for 1 h at a stirring speed of 800 rpm, so that the paraffin is wrapped with zinc oxide to obtain microcapsules as the oil phase;
[0058] Add 6.0g of emulsifier Span 80, 2.0g of Tween 80, 1.0g of fatty alcohol polyoxyethylene ether, 1.0g of stearic acid and 1.0g of sodium lauryl sulfate into 200g of 95°C aqueous solution, at a stirring speed of 300rpm Stir for 30min to obtain the water phase;
[0059] Add the oil phase to the water phase dropwise, control the dropping rate to 5 drops / second, and stir for 20 minutes at a stirring speed of 1200 ...
Embodiment 2
[0063] Sulfur for vulcanizing polyisoprene latex, accelerator ZDC (zinc diethyldithiocarbamate), accelerator M (2-mercaptobenzothiazole), antioxidant 264 (2,6-di tert-butyl p-cresol) and zinc oxide were ground in a ball mill for 72 hours according to the ratio of 2.5: 1.5: 1: 1.5: 3, and prepared into a mixed compound dispersion with a solid content of 50%, for use;
[0064] Put 200 g of solid paraffin wax with a melting point of 64°C and a grade of 64# into a three-necked flask equipped with a condenser, then raise the temperature to 85°C to melt the paraffin wax for 30 minutes, and the stirring speed is 500 rpm to obtain molten paraffin;
[0065]Pour 120 g of the mixed compound dispersion into molten paraffin, and stir for 1 h at a stirring speed of 1200 rpm, so that the paraffin is wrapped with zinc oxide to obtain microcapsules as the oil phase;
[0066] Add 16.0g of emulsifier Span 80, 5.0g of Tween 80, 4.0g of fatty alcohol polyoxyethylene ether, and 3.0g of stearic acid...
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