A kind of ultrafine environment-friendly thermal expansion microcapsule and preparation method thereof
A heat-expandable microcapsule, environmental protection technology, applied in the directions of microcapsule preparation, microsphere preparation, etc., can solve the problem that the particle size of the heat-expandable microcapsule cannot be obtained in sub-micron level, etc.
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Embodiment 1
[0040] A preparation method of ultrafine environmental protection thermally expandable microcapsules, comprising the steps of:
[0041] (1) Preparation of water phase: 0.2 parts by weight of tween-20 and 0.5 parts by weight of Span-60, 5 parts by weight of polyvinylpyrrolidone, 60 parts by weight of sodium chloride, 0.2 parts by weight of sodium nitrite were added to 400 parts by weight in deionized water and dispersed to obtain a water phase composition;
[0042] (2) Preparation of oil phase: 10 parts by weight of isopentane, 30 parts by weight of isooctane, 20 parts by weight of acrylonitrile monomer, 80 parts by weight of methyl methacrylate, 1 part by weight of dilauroyl peroxide, 1 part by weight of Parts of trimethylolpropane trimethyl methacrylate are mixed uniformly to obtain an oil phase composition;
[0043](3) Preparation of dispersion: add the oil phase composition to the water phase composition, and at room temperature at a stirring speed of 15000r / min, emulsify ...
Embodiment 2~10
[0047] Except for changing the type and amount of each component in the oil phase composition, other conditions are the same as in Example 1, see Table 1 for details.
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