Special Polyurea Anti-Corrosion Coating for Seawater Desalination Caisson

• CAS No.: 9001
• Formula: Texture
• EINECS: Texture
• Color: All Color Can Offer
• Appearance: Liquid
• Main Raw Material: Polyurethane
• Model NO.: STWD9001
• Method: Spray
• Level: Finish Coat
• Drying Method: Chemical Mechanical Curing
• Certification: ISO9001
• Substrate: Steel
• Components: Film Forming Matter
• Formation Mechanism: Conversion Type
• Transport Package: Barrel/Pallet
• Specification: 210L
• Trademark: STWD
• Origin: China
• HS Code: 3909310000
• Production Capacity: 50000kg/Day

Product Description

Product descriptions    STWD9001 desalination caisson special polyurea is a 100% solid content aromatic polyurea elastomer material. It has high anticorrosion and erosion resistance to seawater and with high cathodic disbonding resistance. It has been widely applied in the large-scale desalination engineering projects in America, Australia and domestic China.

Product features and advantages
*Solvent free, 100% solids, safe, environmentally friendly and odor free.
*Rapid cure, can be sprayed forming on any bent, slope and vertical surfaces without sagging.
*Dense coating, seamless, with good flexibility.
*High adhesive strength, fast bonding well on steel, concrete substrate
*Excellent impact resistance and abrasion resistance
*Excellent anticorrosion 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 lifelong maintenance cost
*Extend the service life of sprayed structure
Product Applications
Anticorrosion waterproof protection of seawater desalination tanks, offshore wharf and other marine equipment.

Product information

Item	A	B
Appearance	Pale yellow liquid	Adjustable color
Specific gravity (g/m³)	1.08	1.02
Viscosity(cps)@25ºC	820	670
Solid content (%)	100	100
Mix ratio (Volume ratio)	1	1
Gel time(second)@25ºC	4-6
Surface dry time(second)	15-40

Physical properties

Item	Test standard	Results
Hardness (Shore A)	ASTM D-2240	90
Elongation rate(%)	ASTM D-412	460
Tensile strength(Mpa)	ASTM D-412	18
Tear strength (kN/m)	ASTM D-624	65
Impermeability (0.3Mpa/30min)	HG/T 3831-2006	Impermeable
Wear resistance (750g/500r)/mg	HG/T 3831-2006	4.4
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)

Application environment

Environment temperature	0ºC-45ºC
Product pre-heat temperature	65ºC-70°C
Pipe pre-heat temperature	55ºC-65ºC
Relative humidity	≤90%
Dew point	≥3ºC

Application guide

Recommend spray machine	H-XP3 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

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 special primer please refer to STWD companies' other brochure.
2. 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	28s	45min	7d
+20ºC	20s	15min	6d
+30ºC	17s	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 220kg/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.

Integrity declaration    
STWD guarantee all technical data stated in this sheet are based on laboratory tests. Actual testing methods may vary due to different circumstances. Therefore please test and verify its applicability. STWD does not take any other responsibilities except the product quality and reserve the right of any modifications on the listed data without prior notice.