- 行业: Paints & varnishes
- Number of terms: 70
- Number of blossaries: 0
- Company Profile:
Represents chemists, chemical engineers, technologists, and supervisory production personnel in the decorative and protective coatings industry and allied industries.
The ability of paint to expand and contract with the substrate without suffering damage or changes in its appearance. Expansion and contraction are usually caused by temperature fluctuations. Some substrates such as yellow pine expand at different rates depending on the type of their grain. Elasticity is a key to durability. Acrylic binders are noted for their elasticity.
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(1) Topcoat which is characterized by its ability to form a smooth surface; originally associated with a high gloss, but may also include lower degrees of gloss, i.e., flat enamels. (2) A class of substance having similar composition to glass with the addition of stannic oxide, SnO2, or other infusible substances to render the enamel opaque.
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A less-expensive ingredient than titanium dioxide that fills out and extends the pigment's capabilities. Extender cannot be used without pigment. Some common extenders are clays, calcium carbonate, and silica.
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The paint's ability to form a continuous dry film. This process is the result of the water or solvents evaporating and the coming together of the binder particles. A continuous dry film repels water.
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The detachment of pieces of paint from the substrate, caused by a loss of adhesion and elasticity. Also known as scaling.
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A co-solvent, combined with water in aqueous (latex) systems to form the total thinner. Various glycols perform various functions, however, they are generally valuable as brushing agents and for temperature stability (ethylene glycol is the chief ingredient in anti-freeze). Generically, CH2OHCH2OH. General term for dihydric alcohols; ethylene glycol is the most simple of the glycols.
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The ability of paint to hide or obscure a surface, color or stain over which it has been uniformly applied. Hiding power is provided by the paint's pigment.
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Fire retardant coating which, when heated becomes plastic and produces nonflammable gasses, such as carbon dioxide and ammonia. The gasses are trapped by the film, converting it to a foam about fifty times as thick as the original paint film. At this stage, the film solidifies, resulting in a thick, highly insulating layer of carbon, which effectively protects the substrate from fire.
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