Polyurethane primer

Abstract

The invention discloses polyurethane primer, which is prepared by physically stirring and mixing 45 to 50 percent of E-03 (containing 5 percent of solid), 10 to 15 percent of polyurethane resin, 0.2 to 0.5 percent of catalyst, 15 to 20 percent of rust resisting pigment, 10 to 15 percent of titanium dioxide pigment, 5 to 10 percent of superfine barium sulfate, 10 to 15 percent of mixed solvent and 5 to 10 percent of polyurethane resin. The primer is a coating meeting environmental protection requirements, has good corrosion-resistance and rust resisting effects, high medium resistance, high quality and bright application prospect and contributes to environmental protection.

Description

Technical field

[0001] The invention relates to a material coating, in particular to a polyurethane primer, which is suitable for various coiled steel plates. Background technique

[0002] At present, the main anti-rust raw materials for primers for pre-coated coiled steel sheets are strontium chromate and zinc chromate, which have strong anti-rust ability, good water solubility, and high temperature baking resistance, but they are more toxic and more harmful to people. Big, not conducive to environmental protection. Contents of the invention

[0003] The problem to be solved by the present invention is to provide a polyurethane primer to overcome the disadvantages of the existing primer. The primer is not only novel in formula, easy to operate, safe and non-toxic to use, does not contain heavy metal raw materials harmful to human body, but also has a more environmentally friendly coating film, strong anti-corrosion and anti-rust capabilities, meets the physical propertie...