Shanghai Daoqin Plastics Co., Ltd.

in coating material production process in, material dispersion is 一 至关 important step/link, its dispersion 效果直接 effect/influence coating material property can and appearance. therefore, selection combined 适 颜 material dispersant is non important, in coating material material in, dispersant not only is effect/influence coating material good bad important factors, also and coating material formulation and raw materials has 一定 关系. material in dispersant function mechanism main/primary is dispersion liquid in solid pellets, its dispersion principle main/primary has di electrical principle, electrical electrical and retardant and other, lower 面我们 will focus/key point introduction this principle specific methods.

water property coating material in use use dispersant must is can solvent water, this can by to powder and water interface upper. currently market upper most commonly used can solvent water dispersant is anionic type dispersant, it in water in electrical can formed anionic 离子, can very good in powder and water between interface upper, make powder pellets surface in dispersant rear formed di electrical 层, anionic by pellets surface 紧密吸附, therefore by is surface 离子. in in, also in types 反离子, this separation 反离子围绕 interface formed expand dispersion 层, in this surface and 反离子 between, in internal and external formed di electrical 层, this is di electrical principle.

micro belt/tape negative electrical and expand dispersion belt/tape positive electrical formed di electrical 层, by electrical electrical 位. hot force electrical is has anionic and cationic between formed di electrical 层, versus electrical 位. dispersion function is electrical electrical 位而不 is hot force electrical 位, electrical electrical electrical 荷不均衡, has electrical 荷排斥 phenomenon, hot force electrical belongs to electrical balanced phenomenon. if in increase large 反离子 concentrated degree, expand dispersion in 自由反离子会 due to electrical force by 迫进入束缚反离子层, this di electrical by pressure shrink, electrical electrical decline, full 部自由反离子变 is 束缚反离子 rear, electrical electrical is 零, is and other electrical 点, if has electrical 荷排斥, has stability property system, 就会发生絮凝 phenomenon.

in stability dispersion system in, remove utilizing electrical 排斥, 即吸附于 pellets surface negative electrical versus 排斥, anti pellets between poly formed large pellets, also need utilizing 空间位 retardant 效应 理论, in already negative electrical pellets in 彼此接近时, make it versus sliding 错开, make pellets sliding 打开, achieve pellets stability dispersion, formed non good dispersion system. this category of 起空间位 retardant function surface active property agent generally is non surface active property agent. if active use electrical 排斥配 combined 空间位 retardant 理论, can formed high degree stability dispersion system.