เคมีภัณฑ์ชนิดพิเศษ

BECKOPOX EP 387W/52WA is an internally plasticized solid resin-Type 1-dispersion with improved shear stability, e. g. for water reducible fast drying anticorrosion primers and coatings for plastics.BECKOPOX EP 387W/52WA is an internally plasticized type 1solid epoxy resin as aqueous dispersion. Formulated together with adequate curing agents such as e. g. Beckopox VEH 2188w/55WA it is suited for corrosion protection primers with very good adhesion to most metallic substrates. It is also suitable for use in single coat and decorative systems for metallic substrates. For optimium corrosion protection it is recommended using 75 % of the stoichiometric curing agent quantity. Dispersion of pigments and fillers can be done in Beckopox EP 387w/52WA if the temperature does not exceed 40 °C. The formulated paint stability can be influenced by the additives used so that it is important to investigate their suitability thoroughly; such additves should not contain functional groups capable of reacting with epoxy groups.

BECKOPOX EP 386W/52WA is an internally plasticized solid resin-Type 1-dispersion with improved shear stability, e. g. for water reducible fast drying anticorrosion primers and coatings for plastics. BECKOPOX EP 386W/52WA is an internally plasticized type 1solid epoxy resin as aqueous dispersion. Formulated together with adequate curing agents such as e. g. Beckopox EH 613w or VEH 2188w it is suited for corrosion protection primers with very good adhesion to most metallic substrates. It is also suitable for use in single coat and decorative systems for metallic substrates. For optimium corrosion protection it is recommended using 80 % of the stoichiometric curing agent not contain functional groups capable of reacting with epoxy groups.

BECKOPOX EM 2120W/45WA is an epoxy-amine-adduct dispersion in water, containing very small amounts of organic co-solvent. Beckopox EM 2120w is suited to formulate water borne 1 pack anticorrosive primers and 1 pack single coats with good anticorrosive properties, especially on smooth steel. Due to the special character of Beckopox EM 2120w very fast drying coatings can be formulated. Pigments and extenders should be dispersed in a pigment paste since Beckopox EM 2120w does not possess sufficient shear stability. Organic solvents in the formulation should be added to the pigment paste or should be diluted with water before adding to EM 2120.

BECKOPOX EM 460/60IBX is an excellent adhesion to steel and nonferrous metals, high corrosion protection, best recoatability. With polyvinylbutyral for one- and two-component washprimers, weldable shop primers. BECKOPOX EM 460/60IBX is used preferably in combination with polyvinyl butyral (PVB) for the production of wash primers and finish coatings. The ratio of Beckopox EM 460 to PVB should be 1 : 3 to 2 : 1. Wash primers based on this binder combination can be produced both as one-pack and two-pack systems. The solids content of primers based on polyvinyl butyral can be greatly increased by the use of Beckopox EM 460. It also improves adhesion and corrosion protection, especially in wash primers with chromate-free pigmentation. Primers based on the combination of Beckopox EM 460 with PVB cause no complications when overcoated with paints based on alkyd resins drying by oxidation, PVC mixed polymers, nitrocellulose and isocyanate-crosslinking acrylic resins. Even in the case of stoving enamels they cause no discolouration of the topcoat. Two-pack epoxy paints should be tested from case to case. Weldable shop primers Beckopox EM 460 is also suitable for the manufacture of weldable shop primers. In this case the PVB component should predominate in the combination. The effect of these primers on pore formation in the weld is slight, as is the odour problem, since no formaldehyde is given off.