Audited Supplier
STWD9008
Stwd9008
All Color Can Offer
Liquid
Polyurethane
Spray
Primer
Air Drying
ISO14001, ISO9001
Conversion Type
STWD
Iron Bucket Packaging
410kg/group
Shanghai, China
Product Description
STWD9008 cable-stayed bridge steel strand wires
special polyurea anticorrosion wearable coating
Product descriptions STWD9008 cable stayed bridge steel strand special polyurea is a 100% solid content aromatic polyurea elastomer. It has been applied on the cable stayed bridges in America, Europe with its excellent anticorroison, abrasion resistance performance. In early 2012, STWD Urethane USA invested a company in China that is STWD Shanghai company, in June 2012, the first batch polyurea for steel strand wires was produced in Shanghai and exported to Europe. In August 2012, Anhui transportation group tested the polyurea application on steel wires that has great effect. STWD steel strand wires polyurea is widely applied in Chinese cable-stayed bridges.
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 and adhesive strength
*Excellent impact resistance and abrasion resistance
*Excellent corrosion resistance and chemical resistance to acids, alkali, salts etc.
*Excellent anti-aging 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 structure
Product Applications
Anticorrosion waterproof protection of various steel wires of bridges.
Products information
| Item | A | B |
| Appearance | Pale yellow liquid | Adjustable color |
| Specific gravity (g/m³) | 1.12 | 1.05 |
| Viscosity(cps)@25ºC | 800 | 650 |
| Solid content (%) | 100 | 100 |
| Mix ratio(by volume) | 1 | 1 |
| Gel time(second)@25ºC | 4-6 | |
| Surface dry time(second) | 15-40 | |
| Theoretical Coverage(dft) | 1.08kg/ Film thickness 1mm | |
Physical properties
| Item | Test standard | Result |
| Hardness (Shore A) | ASTM D-2240 | 92 |
| Elongation rate(%) | ASTM D-412 | 480 |
| Tensile strength(Mpa) | ASTM D-412 | 19 |
| Tear strength (N/km) | ASTM D-624 | 67 |
| Impermeability(0.3Mpa/30min) | HG/T 3831-2006 | impermeable |
| Wearable(750g/500r)/mg | HG/T 3831-2006 | 4.2 |
| Adhesive strength(Mpa)concrete base | HG/T 3831-2006 | 3.2 |
| Adhesive strength(Mpa) steel base | HG/T 3831-2006 | 11.5 |
| 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# diesel, crude,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) | |
Product application environment
| Environment temperature | 0ºC-45ºC |
| Product spray heating temperature | 65ºC-70ºC |
| hose heating temperature | 55ºC-65ºC |
| Relative humidity | ≤90% |
| Dew point | ≥3ºC |
Product application guide
| Recommend spray machine | Polyurea spray equipment |
| Spray gun | Fusion-air purge or mechanical purge |
| 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 special primer please refer to STWD companies' other brochure.
- Always apply STWD spray polyurea 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 | 30s | 45min | 7d |
| +20ºC | 23s | 15min | 6d |
| +30ºC | 17s | 5min | 5d |
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 220kg/drum, part B 200kg/drum
Make sure the product package sealed well
* store in cool and ventilated place, avoid direct sunshine exposure.
