Special Polyurea for Buried Pipelines

• CAS No.: Stwd90511
• Color: All Color Can Offer
• Appearance: Liquid
• Main Raw Material: Polyurethane
• Method: Spray
• Level: Primer
• Model NO.: STWD9511
• Drying Method: Air Drying
• Certification: ISO14001, ISO9001
• Formation Mechanism: Conversion Type
• Transport Package: Iron Bucket Packaging
• Specification: 410kg/group
• Trademark: STWD
• Origin: Shanghai, China
• Production Capacity: 80000kg/Day

Product Description

STWD9511 buried pipeline special polyurethane 
anticorrosion protective coating
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# diesel, 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

1. Agitate part B uniform prior to application, thoroughly mix the deposited pigments, or the product' quality will be affected.

1. 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.
2. 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.