Technical index of coating anti-mildew agent KP-M21

2021-10-29   Pageview:162

Appearance: milky white suspension liquid.
Density: 1.14~1.20g/ml.
Heat resistance: less than 150℃.
Ph (25℃): 5.0~8.0.
Effective content: Greater than 40%

 

 

 

 

 

 

 

 

 

 

 

 

Paint manufacturers can find many rheology modifiers on the market. Literature [11] lists more than 100 kinds of rheology modifiers for water-based organic coatings. From the chemical structure, it can be divided into organic and inorganic, and the molecular weight ranges from low to high.

We often regard thickeners and rheology modifiers as synonyms, but to be precise, thickeners change with the amount of addition at low, medium, and high shear rates, resulting in the same viscosity change, which is high. The shear rate will give parallel curves [12]. However, rheology modifiers can only change the viscosity curve and characteristics of a certain section. This type of product is very effective when there are specific requirements for the viscosity of the low or high shear section.

The most basic flow state of the coating depends on the base material, solvent, and hdpe wax questions of course the type and amount of pigment/filler. Pigment volume concentration (PVC), base material (emulsion) protective glue system and temperature changes will all have a great influence. As the molecular weight of the base material and solvent increase, the viscosity of the coating will increase accordingly. Various interactions determine the viscosity of the polymer solution. In addition to the inherent viscosity of the solvent, the chain entanglement of the polymer, and the molecular weight of the base material, molecular interactions such as hydrogen bonds also have a great impact on the viscosity. Compared with the protective gum solution, the polymer emulsion shows different rheological
properties. At this time, the viscosity is not affected by the molecular weight. This is because there is no molecular interaction between the emulsion particles and the solid content is relatively low. The particle size and particle size distribution of the emulsion may have some influence on the viscosity, which is used by the emulsion manufacturer. The surface active agent and protective glue will greatly affect the viscosity [1415]. After the solid content rises or before the film formation occurs, due to the very high bulk density, the emulsion particles begin to aggregate.
Set, the viscosity rises sharply at this time.

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