Dispatch of Chinese paint net / colorful coating is abounded because of its colour, construction is convenient, can get the adornment result with stereo very strong sense via spray and the price is low, go to the lavatory overhaul, newlier, in decorating a project by wide application. Colorful coating builds paint unlike the tradition, wait like acrylic coating, benzene third coating, these coating all are single-phase, concolorous divide evenly the coating product of one sex, product quality is stabler, and colorful coating is polychromatic, polyphase particle mixes coexistence, the stability of product quality has a lot of problems possibly to arise.
One, common problem
1. The float layer of colorful coating. The float layer of colorful coating is to show colorful coating has partial grain to float on face of protective glue fluid inside finished product bucket, whole fluid face has certain ply inside cloth pailful. This part grain floats at protecting peptization fluid face, contact with air directly, cause wrap up to because evaporate to attenuate gradually,protect sizy film in the one {TodayHot} layer of grain surface, till damaged, lose, affected coating uniformity, application property and film adornment sex badly. Colorful coating is by enamel of of all kinds (dispersive photograph) as sizy as protection solution (dispersive medium) the juice of stable in suspension that make, proportion of this requirement two-phase is close to as far as possible, equal even. If enamel particle proportion is less than protective glue proportion, enamel particle rise forms float layer, create particle mutual and shirt-sleeve and knot skin; Or enamel particle protects sizy proportion than be more than again, through period of time, enamel particle heavy volume at container bottom, as a result of gravitational action concentrated caboodle gets together and shirt-sleeve, destroy the form that wants particle. Because this enamel, protection is sizy,the difference between specific gravity and them is worth, it is the main factor that affects float layer phenomenon.
2. Colorful coating bleeding and dispersive medium are muddy. The dispersive medium of colorful coating presents an as same as colour bead color apparently, dispersive perhaps medium becomes lacteal and muddy liquid, serious when appear in muddy fluid lots and lots of other people of tiny sliver account. The main reason that creates this kind of appearance is intensity of diaphragm of gel of colour bead surface too insufficient, flimsy, the dye of colour bead interior, filling, auxiliary through flimsy diaphragm ceaseless to place permeate, decentralize medium brought the facial expression of colour bead gradually, as a result appears muddy phenomenon. Cause diaphragm strength insufficient, very flimsy main reason is dispersive medium is medium not the chroma of solvent is insufficient.
3. Dispersive medium garrulous coagulates agglomerate, into the group, form the batt shape colloid that disperses not easily, lap colour bead inside entirely. And store time is longer, problem Vietnam is serious, the main reason that creates this kind of appearance is dispersive photograph and dispersive medium acid-base value improper, disperse especially the alkalescent on the high side of medium, the high polymer compound in causing dispersive medium condenses greatly small conglomeration gradually, some becomes batt state, some reticulate condense a group.
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