Epoxide resins paint coatings

Fig.51 Effect of the hardening system in an epoxide resin powder coating on the coloristic properties of the paint. Pigment Dibromoanthanthrone (Pigment Red 168). Cross-linking conditions 15 minutes at 180°C, respectively.

Frequent skin contact with paints and coating materials can cause skin disorders, particularly on the hands, in painters and coaters. The lipid-solubilizing properties of the organic solvents may cause or at least promote contact eczema. In particular, paints based on reactive resins (e.g., epoxy and polyester resins) may cause allergic skin disorders. Skin-sensitizing substances include residual monomers and reactive diluents (e.g., acrylates and epoxides) and paint additives (e.g., acid anhydrides. 

A more convenient method is not to decrease the elastic modulus of the whole adhesive but to form an elastic finish coat [182] not less than 30 pm thick [183] on the adhesive—substrate interface. With lower elastic modulus, the mobility of structural elements decreases. Application of an elastic sublayer decreased the internal stresses during the formation of coatings made of unsaturated polyester resins [185], epoxides [186], and polymer solutions [187]. The use of elastic finish coats found comparatively wide application for paint coatings but seems less promising for adhesive-bonded joints because of decrease of the adhesion strength due to the low cohesion strength of the finish coat itself and because of the labor requirements in producing the adhesive-bonded joints. 

Storage Store in cool, dry, well-ventilated place away from heat, sparks, open flame, other ignition sources keep tightly closed Uses Solvent for cellulosics, acrylics, epoxides, alkyds, polyester, PU, paints/coat-ings, industrial applies. solvent-sealing of cellophane polyester and alkyd resins antifreeze coolant heat transfer fluid deicing fluid plasticizer detergents and surfactants bactericide surf. tens, reducer in cleaners chem. intermediate in foods, pharmaceuticals, personal care... 

Natural soybean oil is too viscous and reactive to atmospheric oxygen to be used in many biobased product applications. These limitations must be overcome for soybean oil to be used in fuels, cosmetics, and lubricants, but on the other hand, soybean oil is not sufficiently reactive to be used in most paints and coatings. Important end-use categories for which economic data exist include fatty acids, paints and varnishes, resins and plastics, drying-oil products, and other industrial products. Coating vehicles (paints and varnishes) and epoxidized oils (resins and plastics) comprise 50% of... 

One can rationalize a need for small rubber inclusions in some of the newer approaches to waterborne and high solids epoxy coating systems. Water-thinned epoxy coating compositions are described (48) where the two-component system consists of a nitrile rubber modified epoxy resin in the epoxide component and a styrene/ butadiene/methylmethacrylate latex modifier for an emulsion-based polyamide hardener component. Showing improved adhesion, impact and water resistance, the paint has good wetting characteristics and can be formulated to a high solids content at low viscosity. 

The most significant marine use of resins is actually in the form of paint corrosion protection systems for hulls. These include polyurethane and epoxide systems, the latter giving good alkali and solvent resistance in addition to providing superior adhesion to most substrates. Such systems take the form of zinc-rich epoxy and epoxy coal-tar combination hull paints. Epoxy powder coatings are also commonly used for the protection of steel pipelines, both on land and offshore. 

Formaldehyde polymerizes by condensation with phenol and urea to form phenol— and urea— formaldehyde resins which are popular and inexpensive adhesives. They are paint and coatings often used in coatings when combined with alkyds, epoxides, polyesters, or acrylic to give strong flexible films. 

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