Colorless Anti-Corrosion and Waterproof Coating

• Customization: Available
• CAS No.: 8028
• Color: All Color Can Offer
• Model NO.: STWD8028
• Appearance: Liquid
• Main Raw Material: Polyurea
• Method: Handabel Brush, Spray or Roller
• Level: Finish Coat
• Drying Method: Air Drying
• Certification: ISO14001, ISO9001
• Substrate: Steel , Concrete
• Components: Mdi
• Formation Mechanism: Conversion Type
• Transport Package: Iron Bucket Packaging
• Specification: 20kg/group or 25kg/group
• Trademark: STWD
• Origin: Shanghai, China
• Production Capacity: 80000kg/Day

Product Description

  STWD8028 polyaspartic anticorrosion coating

Descriptions          STWD8028 is a reaction polymerization of polyaspartic ester and polyisocyanate, since polyaspartic is an aliphatic sterically hindered secondary amine, and the curing component selected is an aliphatic polyisocyanate, the coating has high gloss and color retention property that is suitable for long-term outdoor use. When the secondary amine group reacts with the isocyanate group, a high-crosslinking density, cross-interpenetrating polymer chain network structure is formed, which also makes the product have good physical and chemical properties.

Features and benefits
* high solids low density, with good leveling, the coating film is tough, dense, full light and bright colors
* excellent adhesive strength, good compatible with polyurethane, epoxy and other coating film.
* high hardness, good scratch resistance and stain resistance
* excellent abrasion resistance, impact resistance
* excellent anticorrosion property, resist to acid, alkali, salt and others.
* no discoloration, UV resistance, no yellowing, no powdering, aging resistance, with excellent weather resistance and gloss and color retention property
* can be applied directly to the surface of metal surface (DTM)
* this product is environmentally friendly and contains no benzene solvents and lead compounds

Application scopes
Anti-corrosion and protection of steel structures, storage tanks, containers, valves, natural pipelines, frames, axles, shelves, tank trucks, swimming pools, sewage pools, chemical cofferdams, etc.

Product information

Item	A component	B component
Appearance	light yellow liquid	Color adjustable
Specific gravity(g/m³)	1.04	1.50
Viscosity (cps)@25ºC	40-60	100-200
Solid content (%)	75	90
Mix ratio (by weight)	1	1
Surface dry time (h)	1
Pot life (h)@25ºC	1
Theoretical coverage (DFT)	0.15kg/m2 film thickness 100μm

Typical physical properties

Item	Test standard	Results
Pencil hardness		H
Adhesive strength(Mpa)metal base	HG/T 3831-2006	9.3
Adhesive strength(Mpa)concrete base	HG/T 3831-2006	2.8
Impermeability		2.1Mpa
Bending test (cylindrical shaft)		≤1mm
Abrasion resistance (750g/500r) mg	HG/T 3831-2006	5
Impact resistance  kg·cm	GB/T 1732	50
Anti-aging, accelerated aging 1000h	GB/T14522-1993	Loss of light<1, chalking <1

Chemical resistance

Acid resistance 40%H2SO4 or 10%HCI, 240h	no rust, no bubbles, no peel off
Alkali resistance 40%NaOH, 240h	no rust, no bubbles, no peel off
Salt resistance 60g/L, 240h	no rust, no bubbles, no peel off
Salt spray resistance 1000h	no rust, no bubbles, no peel off
Oil resistance, engine oil 240h	no rust, no bubbles, no peel off
Water resistance, 48h	No bubbles, no wrinkled, no color-changing, no peel off
(Note: The above chemical resistant property is obtained according to the GB/T9274-1988 test method, for reference only. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data.)

              
Processing recommendation

environment temperature	-5~+35ºC
humidity	≤85%
dew point	≥3ºC

Application instructions
Hand brush, roller
Air spray, with air pressure 0.3-0.5Mpa
Airless spray, with spray pressure 15-20Mpa
Recommend dft: 150-300μm
Recoating interval: min 1h, max 24h

Application tips
Agitate part B uniform prior to application.
Strictly mix the 2 parts in right ratio and agitate uniform, use up the mixed material within 1h.
Seal the package well after use to avoid moisture absorption.
Keep the application site clean and dry, forbidden to contact with water, alcohols, acids, alkali etc



Product cure time

Substrate temperature	Surface dry time	Foot traffic	Solid dry time
+10ºC	2h	24h	7d
+20ºC	1.5h	8h	7d
+30ºC	1h	6h	7d

Note: the curing time is different with environment condition especially when temperature and relative humidity changes.

Shelf life
Storage temperature of environment: 5-35ºC
* shelf life is from the manufacturing date and sealed condition
Part A: 10 months     Part B: 10 months
* keep the package drum well sealed.
* store in cool and ventilated place, avoid sunshine exposure.
Package: part A: 25kg/barrel, part B: 25kg/barrel.        
               
Product health and safety information  
For information and advice on the safe handling, storage and disposal of chemical products, users shall refer to the most recent Material Safety Data Sheet containing physical, ecological, toxicological and other safety related data.