Лако-красочные материалы — производство

Conventional acrylic resins based on acrylic monomers and styrene monomer are soluble only in blends of polar and aromatic solvents and have limited miscibility with aliphatic solvents. This limits their use in conjunction with the traditional white spirit based alkyd enamels and water based coatings used in the building sector. To counter this, Goodyear developed […]

These acrylic resins are essentially based on pure acrylic monomers or blends of these with styrene monomer. They are applied by brush, roller or airless spray. The last method allows the application of thick coatings over large areas, though heavily textured coatings will require more specialised equipment such as spatter, or plaster guns. The heavy […]

by Ian Royston BSc and Roy Usher BSc Thermoplastic acrylic polymers are used in the decoration and protection of masonry and concrete, for both interior and exterior applications. Due to the highly alkaline nature of most masonry materials, one of the fundamental properties required for high performance long-life coatings on such a substrate is resistance […]

A typical formulation for a modified acrylic topcoat6 is given below : FORMULATION 3-7:MODIFIED ACRYLIC TOPCOAT Ingredient Percent Supplier Neocryl B811 18.6 Zeneca Vinylite VYHH 6.2 Union Carbide Methyl ethyl ketone 28.4 Isopropanol 21.1 Butyl acetate 14.1 Butyl glycol 3.0 Sparkle Silver 3000AR 4.2 Silberline Butyl glycol 4.1 Byk 301 0.3 Byk Chemie Total 100.0 […]

Acrylic systems are used extensively in the coating of plastic substrates and encompass three technologies • Thermoplastic acrylics • Two-component isocyanate cured acrylics. • Thermosetting acrylics. The choice of a system depends upon the resistance of the polymer to both temperature and organic solvents and the final requirements of the specifier. The latter two technologies […]

This class of plastic is far more important to the plastics coating sector, in respect of the tonnage used, and the diversity of the polymer types employed. The following thermoplastics account for the majority of moulded articles which are subsequently coated. ABS (Acrylonitrile-butadiene-styrene) — is a high performance commodity plastic used particularly in the automotive […]

The choice of a particular coating for a plastic substrate is dependent upon the nature of the substrate itself. Some of the more common plastics materials that require coating are identified below. A. Thermosets These plastics are stable up to relatively high temperatures, chemically inert and resistant to most common organic solvents. Hence as a […]

by Chris Langham LTSC i It has long been predicted that self coloured plastics, achieved by pigment addition during manufacture, would eliminate the need for plastic coating. Whilst this is true, new areas have developed, thus creating an overall increase in the volume of plastics being coated. The reasons for coating plastics are briefly summarised […]

Thermoplastic acrylics are used extensively in aerosol lacquers, both as solid colours and metallics, in touch up automotive refinish applications. Due to their excellent colour, colour retention, rapid drying, relative inertness to metallic and fluorescent pigments, and exterior durability, they are also used for small household jobs such as repainting furniture (chairs, stools), metal coatings, […]

A typical TPA paint formulation for automotive applications is given below <3). FORMULATION 3-1: WHITE AUTOMOTIVE THERMOPLASTIC GLOSS TOPCOAT 50% Titanium dioxide/Acrylic* mill base 36.22 High Mol. Wt. thermoplastic methacrylate copolymer (40% solution) 34.58 Cellulose acetate butyrate CAB 381-2 5.27 Ester plasticiser (eg trimethyl pentanediol dibenzoate) 5.27 Dowanol PM acetate 1.56 Ketone (eg MEK) 9.00 […]