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What dispersion binders are considered to be particularly alkali-resistant?
Particularly alkali-resistant dispersion binders are acrylates and a styrene-butadiene copolymer (more commonly known as latex). Polyvinylacetate and polyvinylpropionate are relatively easily saponified by alkalis. Due to the many possible linkages, It is not easy to assess the alkali resistance of the copolymers.
What does the term "cold confluence" mean?
"Cold run-off" is commonly used to describe the physical drying process of dispersion paints: After the water evaporates, the plastic particles blend together and stick together, thus creating a film of dispersion paint.
Please explain the MFT orphans
MFT stands for German words: Minimum film formation temperature (lowest film formation temperature). This is the lowest temperature, in which the plastic dispersions can still form a film. In practice, this temperature is assumed to be 278 K (5°C).
Which means the term "white temperature" of the dispersion? "White temperature" is this temperature, in which the plastic dispersion can no longer form a film. For this reason, dispersion binder, which is actually colorless when dry, due to the refraction of light on individual plastic particles, it retains a whitish color. The "white temperature" is very close to the lowest film-forming temperature, but it is shorter than it.
Which means "cold break temperature" in the case of a film produced by a dispersion paint?
The "cold break temperature" is that temperature, in which some thermoplastic material, so e.g.. film from dispersion paint, it breaks under a slight load. Plastomers (thermoplasty) they become harder and more brittle as the temperature is lowered. So if a load occurs at low temperatures, e.g. as a result of enlarging the scratch, the dispersion paint coating will crack. Therefore, dispersion paints should have the lowest "cold break temperature".