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TAS-9201 Waterborne Epoxy Midcoat

A water-based two-component midcoat composed of water-based epoxy resin, water-based epoxy curing agent, water, etc. It is used to connect the primer and topcoat when applying floor coatings. It can enhance the flatness and thickness of the ground and lay the foundation for beauty. The aggregate in it can enhance the mechanical strength of the entire floor. It is particularly suitable for hospitals, food factories, supermarkets, dairy factories, cosmetics factories, etc., where the ground and humid environments need to be kept highly clean, such as underground parking lots, first floor floors, and places where low construction odor is required. It is generally used in combination with water-based epoxy floor topcoat.

Product Details:

Product Features
●Environmentally friendly, low odor, safe

●Strong adhesion, wear resistance, impact resistance, good air permeability, no bubbling, good flow and spread

●With water as the dispersion medium, it can be constructed in a humid environment

●Can be matched with quartz sand and (or) quartz powder to make the middle layer paint of floor coating

Basic data
color Various
Mixing ratio Main agent/curing agent = 5/1 (weight ratio)
solid,% 85±2
Painting times  1~2 times
Dry film thickness, mm  0.15~1.5
Coating rate Dosage: 0.3~1kg/m2
Actual value: It is related to many factors such as surface treatment, external environment, construction method, etc.
Serial number Test items Technical indicators Measured Testing standards
1 Status in container Stir to mix evenly without lumps qualified Visual inspection
2 Drying time (25℃), h Touch Dry ≤6 3 GB/T 1728-1989
Get down to business ≤48 16
3 Bond strength, MPa ≥2 2 GB/T 16777-1997
4 Adhesion, Grade ≤1 0 ASTM C579
5 Flexibility, mm ≤2 1 GB/T1731-1933
6 Resistance to 3% NaCl, 72h No bubbling, no shedding, slight discoloration allowed qualified GB/T9724-1988
7 Resistant to 20% NaOH, 72h The paint film is complete, without blistering or peeling, and slight discoloration is allowed qualified GB/T 9274-1988
8 Resistant to 10% H 2 SO 4 ,48h No bubbling, no shedding, slight discoloration allowed qualified GB/T9274-1988
Construction reference
Surface treatment
● For all new and old concrete floors, the concrete strength must reach C25 or above. The surface stains, loose soil, moisture, loose old paint film and other attachments must be completely removed until the solid concrete is exposed. For concrete contaminated by chemicals or other substances, they should be removed until the solid concrete is exposed. Make the surface clean, dry and flat.

● Old floors with paint
Completely grind away loose or incompatible old coatings to expose the concrete surface. Clean, dry and intact compatible coatings do not need to be removed.

● Oily floors
Oil stains will seriously affect the adhesion of floor coatings to the base surface. Oily floors must be completely cleaned and polished.

● New concrete floors
Make sure the floor has exceeded the maintenance period and the moisture content of the floor is less than 6%. It is critical to use mobile sandblasting tools and grinding equipment to treat the concrete surface to achieve the correct surface roughness.

Paint mixing method
After fully stirring component A, pour component B into component A according to the specified ratio, then stir evenly with a special stirrer and dilute with water to the construction viscosity. Mix as much as you need and use it up within the use period to avoid wasting the gel.
Construction conditions
Painting environment temperature range: 5~35℃. The base surface temperature is at least 3℃ higher than the air dew point temperature.
Painting environment humidity range: Relative humidity is less than 80%.
Ventilation conditions: The construction site should be ventilated and dust-free. However, there should be no strong wind to avoid dust from being brought in and affecting the appearance.
Construction data
● Mixed use period

Temperature(℃) 5 10 25 30
Mixing period (min) 60 60 20 30

● Construction method

Airless spray, air spray, brush and roller
Roller coating Large area construction use
Spraying Can be applied using conventional air spray or airless spray
Brush It is recommended to use a soft-bristled brush for small areas.

● Thinner water

● Drying time and coating interval

Temperature(℃)  5 10 25 30
Surface dry(hrs)  12 6 3 2
Working (hrs)   36 twenty four 12 10
Minimum painting interval (hrs)   twenty four 16 12 10
Maximum painting interval (days) 2 1 1 1

● Painting package
Applicable substrate Cement or concrete floor
Applicable coating Epoxy primer TAS-9501 Epoxy topcoat TAS-9500

Shelf life
From the date of production, if stored according to the storage conditions, the shelf life of the product is 12 months.
Storage and transportation
The paint should be sealed and stored in a dry, cool and well-ventilated place, avoiding high temperature and fire.
During transportation, the environment of the carriage should be dry and closed, the materials should be stacked stably, and the relevant regulations should be met.
Safety measures
Product safety and health data are available upon request. The following measures should be ensured during any paint application:

● Avoid contact with skin and eyes.

● If paint comes into contact with skin, wash with warm water and/or an appropriate detergent. If paint comes into contact with eyes, rinse with plenty of water and seek medical attention immediately.

● Ensure good ventilation.

● Paint contains flammable substances. Please keep away from sparks and prohibit smoking in the vicinity.

● Comply with all health and safety regulations on site.

Attention
The information provided in this manual is the most comprehensive and correct information we have at present. Since the conditions of product use are beyond our control, the information here does not contain any guarantee. Due to the continuous development of our company’s products and production processes, all information here is subject to our confirmation.

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