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1. Film-forming polymers
1.1 Classification of film-forming polymers
Paints and varnishes contain as their main constituent a film-forming polymer (binder or resin) which, after curing, forms a continuous, adherent film with specific properties on the substrate. By definition, these polymers or macromolecules are organic or inorganic compounds with molecular weights between 300 and 10 6 daltons. Several types of film-forming polymers are usually distinguished.
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Polymers of natural origin, including natural resins and gums, secretion products of plants (Landes pine gum) or insects (shellac) and fossil substances known as "Copal" (Copal gum Zanzibar, Madagascar, Congo, Kauri...).
These polymers,...
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Film-forming polymers
Paint classification
Bibliography
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In Engineering Techniques
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Paint standardization
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Different types of standards exist:
national standards specific to each country (AFNOR in France, ASTM in the United States, DIN in Germany, BSI in Great Britain);
international standards of worldwide scope, set up by ISO but whose use is not mandatory in individual countries;
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Regulatory aspects
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Paints
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Paints for food contact
All items likely to come into contact with foodstuffs must meet inertness requirements so as not to impart any taste to the food or allow any of their constituents to migrate.
The regulations take up these requirements by setting out the list of substances authorized...
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