STWD9511 buried pipeline special polyurethane
anticorrosion protective coating
Product Description
Product descriptions STWD9511 is a 100% solid content aromatic polyurethane elastomer. It can adapt to the complex geological structure layer, the hot & cold climate zone, the soil erosion in different climates. It obtained the attention of relevant engineering and construction unit with its excellent physical property and stable wearable performance, which has been widely applied on the buried pipelines.
Product features and advantages.
*Solvent free, 100% solid content, safe, environmentally friendly and odor free.
*Rapid cure, can be sprayed forming on any bent, slope and vertical surfaces, no sagging.
*Dense coating, seamless, with good flexibility.
*Strong 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 to acids, alkali, salts etc.
*Excellent waterproof performance
*Good shock absorbing performance
*Excellent resistance to temperature variation
*Fast cure, application site back to service quickly
*Excellent durability to reduce maintenance cost of service life
*Extend the service life of sprayed structu
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Product Applications
Petroleum chemical industry, municipal, urban water supply and drainage, and other fields of buried pipeline.
Products information
| Item |
A |
B |
| Appearance |
Light yellow |
Adjustable |
| Specific gravity (g/m³) |
1.15 |
1.03 |
| Viscosity(cps)@25ºC |
1100 |
1000 |
| Solid content (%) |
100 |
100 |
| Mixing ratio by volume |
1 |
1 |
| Gel time(second)@25ºC |
25-35 |
| Theoretical Coverage (dft) |
1.05kg/m2 film thickness:1mm |
Products information
| Items |
Test standard |
Result |
| Hardness (Shore D) |
ASTM D-2240 |
70 |
| Elongation rate(%) |
ASTM D-412 |
20 |
| Tensile strength(Mpa) |
ASTM D-412 |
25 |
| Tear strength (N/km) |
ASTM D-624 |
78 |
| Impermeability(0.3Mpa/30min) |
HG/T 3831-2006 |
impermeable |
| Wear resistance (750g/500r)/mg |
HG/T 3831-2006 |
15 |
| Adhesive strength(Mpa)concrete base |
HG/T 3831-2006 |
3.6 |
| Adhesive strength(Mpa) steel base |
HG/T 3831-2006 |
12 |
| Density(g/cm³) |
GB/T 6750-2007 |
1.02 |
| Cathodic disbondment [1.5v,(65±5)ºC,48h] |
HG/T 3831-2006 |
≤15mm |
Chemical resistance
| 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# die sel, 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) |
Application environment
| Environment temperature |
0ºC-45ºC |
| Product spray heating temperature |
65ºC-70°C |
| Pipe heating temperature |
55ºC-65ºC |
| Relative humidity |
≤80% |
| Dew point |
≥3ºC |
Application guide
| 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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