Sơn Nippon PU
NIPPON POLYURETHANE is a two-pack Polyurethane Finish based on the chemical reaction of the polyfunctional Acrylic Polyol and the Isocyanate based material with excellent weathering resistance coating. High duty finishes for maximum gloss and colour retention. It is specially designed finish coat for exterior and interior use over the appropriate primer for application on ferrous and non-ferrous metal, wood, timber, plastics, masonry and concrete substrates.
Physical Characteristics of Paint:
Colour: Standard colours as per colour card. Special colours on request. (Solid and Metallic)
Finish: High Gloss
Specific Gravity: 1.24 ± 0.05 (1) (for Mixture of Base & Hardener)
Solid Content:44 ± 2 by volume (1) (for Mixture of Base & Hardener)
Adhesion: Excellent with combination with NIPPON Primer & Undercoats.
Corrosion Resistance: Unaffected by salt water or aggressive industrial environments
Chemical Resistance: Good resistance to oils, fats, aqueous solution and most industrial chemicals
Weathering: Recommended for direct exposure to sunlight. It is always used as a finish coat in conjunction with a Nippon Epoxy primers
Temperature: Dry service temperature range up to 100°C
Remark: (1) Base on White colour
- Long recoatability properties
- Can be applied to a large number of substrate
- Does not chalk easily despite exposure to UV light
- Resistant to splash and spillage of large variety of dilute acids, alkalis, detergents, solvents, petroleum products, mineral and vegetable oils.
Recommendation for Use:
Mild Steel Surfaces
Abrasive blasted in accordance with Swedish Standard Sa 2.5, preferably Sa 3.0 (SIS 05 59 00 / ISO 8501-1). Shop-prime immediately with a suitable shop-primer e.g.. NIPPON EA9 RED OXIDE PRIMER, NIPPON ZINC PHOSPHATE BLAST PRIMER or NIPPON ZINC RICH PRIMER HS after abrasive blasting follows up with a compatible barrier coat or intermediate coat.
Galvanised Steel Surface
New galvanised surface requires to be degreased in accordance to SSPC-SP1. For old galvanised surface, it must be abraded to remove corrosion deposits. Shop-prime with a suitable etching primer e.g. NIPPON VINILEX 120 ACTIVE PRIMER. All surfaces must be dry and fee from oil and grease prior to painting.
Masonry and Cement Concrete Surface
Moisture Content must be below 6% checked by Sovereign Moisture Meter. Unstable matter such as powder, old paint film, dirt and loose plaster should be removed by high pressure water jet washing or mechanical means such as power brush or scraper whichever is suitable. High pressure water jet may be used for external wall. Contaminants, dust and foreign matter should be removed by cleaning with damped cloth. Oil or grease should be removed by solvent cleaning or mild detergent. Allow surface to dry again. After that prime with 1 coat of 20 to 40% thinned NIPPON EA9 WHITE PRIMER as sealer/priming coat.
Recommended No. of Coats: 2 coats
Recommended Film Thickness per coat:
35 microns for dry film
80 microns for wet film
Application Methods: Brush, roller, compressed air spray and airless spray
Roller & Brush: 10% maximum
Air Spray: 25% maximum
Airless Spray: 5% maximum
Mixing Ratio: 9 parts by volume of NIPPON PU (BASE) to 1 part by volume of NIPPON PU HARDENER.
Stir the content of the BASE component, continue stirring and gradually add the total content of the HARDENER component, continue stirring until a homogeneous mix is obtained.
Pot Life at 25oC to 30oC: 4 - 6 hours after mixing, depending on prevailing temperature
Thinner: NIPPON PU THINNER or NAX SUPERIO 501 SLOW THINNER
Cleaning Solvent: NIPPON PU THINNER or NAX SUPERIO 501 SLOW THINNER
Note: All equipment should be cleaned IMMEDIATELY with Thinner after use. For thinning, substitute thinners other than those approved or supplied by Nippon Paint may adversely affect the product performance and void product warranty whether expressed or implied.
Drying Time at 25oC to 30oC:
Dry to touch: 30 minutes
Dry to handle: 5 hours
Dry to overcoat: Minimum 8 hours
Curing time at 25°C to 30°C: 5 - 7 days
Note: Drying time will become remarkable under low temperature. Overcoating the previous coat of NIPPON PU should be done within 6 - 7 days but preferably as soon as possible after it has been allowed 16 hours drying or else, it is desirable to roughen it by dry sanding with sandpaper before it is overcoated. This is to ensure proper intercoat adhesion. Exposure of the paint film to water, chemical and abrasion should be avoided as far as possible before full cure of the coating. When chalking occurs, chalks should be removed by water washing. Allow the surface to dry thoroughly prior to overcoating.
5 Liters (4.5 Liters BASE & 0.5 Liter HARDENER)
20 Liters (18 Liters BASE & 2 Liters HARDENER)