Polyurea Coating for Heavy-Duty Anti-Corrosion in Petrochemical Industry

• Customization: Available
• CAS No.: Stwd9512
• Color: All Color Can Offer
• Model NO.: STWD9512
• Appearance: Liquid
• Main Raw Material: Polyurethane
• Method: Spray
• Level: Primer
• 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

STWD9512 petrochemical heavy-duty special
polyurea anti-corrosion protective coating

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# 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)

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

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.