coating material Common solution methods

industry: 油 property coating material, water property coating material

front 言: in coating material design formulation and process in, 经常会遇 to various issues, has can can 会引起 table/sheet defect, has can can property can reduce, this 都应避免.

additives, tool has use amount less, function obvious features. for/regarding Common small issues, can through additives adjustment.

coating material film main/primary 弊病:

1.浮 color and 发花

描述: has types above material color 漆, coating rear types or types material relatively high ratio/proportion separation 离出, 并飘浮 to coating film surface, color table/sheet 里不一致 称 is color, surface color 不一致 称 is 发花.  

can can generate causes:

a. material dispersion defect, material stability full.

b. material 粒径, specific gravity different, property has 差异.

c. film surface force 差异.

d. solvent agent fast.  

solutions:

a. selection combined dispersant, ensure material dispersion good.

b. selection combined has machine silicon leveling agent, reduce surface force 差异.

c. selection 适当 流变 additives, add strong/high for material pellets control.

d. use slow dry solvent agent.

2.颜 material 絮凝, coarse  

描述: coating material in material high speed dispersion or abrasion, by material or lubricating wet dispersant dispersion rear, 经 存储, material also heavy new poly formed 团.

can can generate causes:

a. ratio high, material has separation lubricating wet.

b. dispersant types type combined 适.

c. dispersant use amount 不足.

d. material surface 未处理, or surface treatment and dispersant versus 互抵触.

solutions:

a. adjustment formulation ratio.

b. use combined dispersant （ has machine material, selection polymer/macromolecule type type dispersant ）.

c. improve/increase dispersant use amount, for/regarding has machine material and 炭黑尤 is important.

d. understanding material surface treatment methods: acid property, alkali property, in property.

e. selection and system versus dispersant or material.

3. shrink 孔

描述: paint rear, surface generate large small and other, distribution 各异 圆形 small 坑.

can can generate causes:

a. 底材清洁 degree 未达标, has 油污.

b. surface force low, or use surface force low.

c. paint in 一 不 versus solvent material 质, strong/high defoamer.  

solutions:

a. 底材处理 dry 净.

b. using/adopting has machine silicon leveling agent reduce paint surface force.

c. control in has machine silicon leveling agent product types and use amount, or in in using/adopting surface additives improve/increase surface force.

d. selection versus for temperature and defoamer.

4.刷痕, orange peel

描述: 施工时, coating has 流平, coating drying rear, surface has obvious 不美观 施工痕迹.

can can generate causes:  施工时, coating material viscosity high. table/sheet dry fast, coating material and 流平.

solution methods:

a. in requirements scope/range inner, amount decrease/reduce additives use amount.

b. can through add dispersant reduce coating material viscosity, increase coating material flow property.

c. 适当添 add high non dilute agent, increase film open time.

d. 适当添 add leveling agent, reduce surface force.