1, in preparation of emulsion paint, the sequence is very important. Such as dispersant must join before you join in yan, packing, or yan, fill in
2, film-forming additives slurry is hard to fine grinding. Other emulsion had better not grinding with yan, packing, otherwise easy demulsification, because of high shearing action, and often have certain defoaming effect, because can gradually in the process of the emulsion to join to join, which can reduce the bubble during the process of mixing, thereby reducing the amount of defoaming agent.
3, the summer can be appropriately reducing the amount of film forming agent, but cannot cancel completely. Film or paint dry too fast, the result is bad, and wrinkled skin, easy to cause defects such as cracks.
4, polyvinyl acetate emulsion paint the final pH should strictly control between 7 and 8, too high or too low will affect the durability of the coating.
5, titanium dioxide rutile type and sharp titanium type two kinds of crystal type, aging resistance of the former is better, but the price is more expensive. Before preparation of interior wall emulsion paint with sharp titanium type titanium pigment, increasingly inclined to both wall USES the rutile type titanium pigment.
6, in use lithopone as pure white pigment, something will appear white degree is not enough. Can be appropriately to join group of green pigments or fluorescent whitening agent whitening.
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