coating material 施工 issues and anti methods

industry: 油 property coating material, water property coating material

front 言: 任何 coating material product has shelf life, this shelf life 就会出现 issues .

一, 变质

① production use filler moisture content high;

② production as process (包括 add material 顺序, reaction temperature degree and time and other)失控;

③ dilute agent has to ester grade requirements;

④ coating material packaging gas, mixed water separation or gas in wet gas;

⑤ packaging inner has reaction property active property material 质, water, alcohol, acid and other.

预 anti and solution method :

① raw materials specifications must combined formulation, process requirements, control filler moisture content;

②严格 according to process conditions production, add material 顺序, reaction temperature degree and time control in scope/range inner;

③抓 good product packaging tube/pipe and conditions control.

二, 结皮

coating material in in surface 结出一层 hard coating film phenomenon is 结皮. generate causes has :

① coating material packaging 桶 密封不严 or packaging in 砂眼;

② catalytic agent use product types or use amount more.

anti coating material generate 结皮 预 anti and solution measures :

① production use combined catalytic agent, 并严格 control catalytic agent use amount;

② coating material packaging 桶应密封严密, anti 止进入空 gas;

③ can add anti agent ketone 肟, ring ketone and other.

三, 沉淀

颜 material and resin separation formed obvious 两层, 底层 颜 material has block method phenomenon 叫沉淀. generate causes has :

① coating material viscosity small, dilute agent use amount large, resin content less;

②颜 material versus for density large, pellets coarse;

③颜 material lubricating wet property 差;

④贮存 time long.

预 anti and solution method :

① add amount has machine lubricating and other coating material commonly used anti agent;

② improve/increase material fine degree, add combined 适 颜 filler wetting agent;

③ in process in will coating material 桶倒放 or 横放, coating material use front uniform,应 in time inner use.

四, 流挂

in 垂直立面 upper 施工时,部 separation coating material toward lower 流淌, generate similar or phenomenon 叫做流挂. generate causes:

①施工 viscosity low;

② selection property fast or slow solvent agent. property fast solvent agent in coating film also full 流平之 front, solvent agent 就挥发掉, selection property slow solvent agent, coating material in 垂直面 upper flow property large, 就会形 formed or 帷幕状;

③施工现场 temperature degree low or wet degree large;

④ coating material in heavy material more, material lubricating wet property good;

⑤ coating material one-time coating thick and other.

anti coating material 施工时 generate measures :

①适当 increase increase agent use amount;

② control 适宜 施工 viscosity;

③施工 ring temperature degree most good is (20~30)℃;

④ coating film one-time coating thick, ultra- 0.5mm is 宜;

⑤ adjustment dilute agent speed degree, attention/notes fast slow solvent agent use.