STWD9512 petrochemical heavy-duty special
polyurea anti-corrosion protective coating
Product Description
Product descriptions STWD9512 is a 100% solids aromatic spray polyurea elastomer. STWD Urethane US Co., work with major research institutions and developed a new heavy duty anticorrosion material for petrochemical industry based on normal polyurea products. The material has been widely used in American regions and received great corrosion protection effect.
Product features and advantages.
*Solvent free, 100% solids, safe, environmentally friendly, odor free.
*Rapid cure, can be sprayed forming on any bent, slope and vertical surfaces without sagging.
*Dense coating seamless, good flexibility.
**High adhesive strength, fast bonding well on steel, concrete, wood, glass fibers and other substrates
*Excellent impact resistance, abrasion resistance
*Excellent corrosion resistance and chemical resistance properties, such as acids, alkalis, salts, etc.
*Excellent waterproof performance
*Good shock absorption performance
*Excellent temperature variation resistance stability
*Fast cure, application site back to service quickly
*Excellent durability to reduce lifelong maintenance cost
*Extend service life of the sprayed structure
Product Applications
Petrochemical industry tanks, cofferdam, towers, wash tank, pipelines, sewage ponds and other facilities of corrosion protection.
Products information
| Item |
A |
B |
| Appearance |
Pale yellow liquid |
Adjustable color |
| Specific gravity (g/m³) |
1.13 |
1.04 |
| Viscosity(cps)@25ºC |
720 |
570 |
| Solid content (%) |
100 |
100 |
| Mixing ratio(volume ratio) |
1 |
1 |
| Gel time(second)@25ºC |
3-5 |
| Dry time(second) |
10-20 |
| Theoretical Coverage (dft) |
1.08kg/m2, film thickness:1mm |
Physical properties of products
| Items |
ASTM D-2240 |
62 |
| Hardness (Shore D) |
ASTM D-412 |
70 |
| Elongation rate (%) |
ASTM D-412 |
23 |
| Tensile strength (Mpa) |
ASTM D-624 |
70 |
| Tear strength (N/km) |
HG/T 3831-2006 |
Impermeable |
| Impermeability (0.3Mpa/30min) |
HG/T 3831-2006 |
4.5 |
| Wear resistance (750g/500r) /mg |
HG/T 3831-2006 |
3.3 |
| Adhesive strength(Mpa)concrete base |
HG/T 3831-2006 |
12 |
| Adhesive strength(Mpa) steel base |
GB/T 6750-2007 |
1.02 |
| Density(g/cm³) |
HG/T 3831-2006 |
≤15mm |
| Cathodic disbondment [1.5v,(65±5)ºC,48h] |
ASTM D-2240 |
62 |
Physical properties
| Acid resistance 10%H2SO4 or 10%HCI,30d |
No rust, no bubbles, no peel off |
| Alkali resistance 10% NaOH, 30d |
No rust, no bubbles, no peel off |
| Salt resistance 30g/L,30d |
No rust, no bubbles, no peel off |
| Salt spray resistance, 2000h |
No rust, no bubbles, no peel off |
| Oil resistance 0# , crud,30d |
No rust, no bubbles, no peel off |
| (For reference: the above data is acquired based on GB / T9274-1988 test standard. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data) |
Chemical resistance
| Environment temperature |
0ºC-45ºC |
| Product spray heating temperature |
65ºC-70°C |
| Pipe heating temperature |
55ºC-65ºC |
| Relative humidity |
≤80% |
| Dew point |
≥3ºC |
Application environment
| Recommend spray machine |
Polyurea spray equipment |
| Spray gun |
Air or machine self-cleaning coatings for spray gun |
| Static pressure |
2300-2500psi |
| Dynamic pressure |
2000-2200psi |
| Recommend film thickness |
1000-3000μm |
| Recoating interval |
≤6h |
Application note
- Agitate part B uniform prior to application, thoroughly mix the deposited pigments, or the product' quality will be affected.
- spray polyurea within the proper time if the substrate surface is primed. For the application method and interval time of STWD polyurea speical primer please refer to STWD companies' other brochure.
- Always apply STWD951 on a small area before large application to check the mix ratio, color and spray effect are correct. For detailed information of application please refer to the latest instruction sheet of the application instructions of STWD spray polyurea series .
Product curing time
| Substrate temperature |
Dry |
Walking intensity |
complete solidify |
| +10ºC |
18s |
45min |
7d |
| +20ºC |
13s |
15min |
6d |
| +30ºC |
10s |
5min |
5d |
Note: the curing time varies with the environment condition especially the temperature and relative humidity.
Shelf Life
* From the manufacturer date and on the original package sealed condition:
Part A: 10 months
Part B: 10 months
*storage temperature:+5-35°C
Packing: Part A 210kg/drum, part B 200kg/drum
Make sure the product package sealed well
* store in cool and ventilated place, avoid direct sunshine exposure.
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.
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