Water-dispersible isocyanate curing agent STD 268
Product Description
STD268 is a water dispersible polyisocyanate based on hexamethylene diisocyanate (HDI). In combination with waterborne polyurethane, polyacrylate, etc., it can be used for water-borne coatings and adhesive. After addition of STD268, the ready-to-use mixture must be used within the pot life.
STD 268 can be diluted with the solvents, such as propylene glycol methyl ether acetate (PMA), propylene glycol diacetate (PGDA), butyl acetate, etc. Only PU grade
solvents (< 0.05% water) should be used and the solvents must be tested in advance by the user to determine suitability.
Properties
1.High gloss and high building up.
2.Excellent weather resistance.
Characteristic Data
(Typical values – not specifications)
|
Property |
Value |
Unit |
Test Method |
| Appearance | Colorless to yellowish transparent liquid | — | Visual |
| NCO content | 20.5 ± 0.5 | % | GB/T 12009.4-2016 |
| Viscosity | 5000 – 7000 | mPa·s | Brookfield LV, 63#/3 rpm,25 °C |
| Color (APHA) | < 80 | — | GB/T 1722-1992 |
| Monomeric isocyanate | ≤ 0.1 | % | GB/T 18446-2009 |
| Flash point | ~196 | °C | GB/T 5208 |
| Density | ~1.17 | g/cm³ | GB/T 4472-2011 |
Storage & Handling
The product should be stored in dry conditions above 5°C and below 35°C with the integrity of the packaging, and prevent direct sunlight. The validity of this product is for 12 months, performance assessment is recommended before use after shelf life. The product should be protected from freezing during storage. Water dispersible polyisocyanates are very moisture-sensitive and react with water to form carbon dioxide and insoluble ureas. The generation of carbon dioxide can lead to dangerous increases in pressure. The containers must always be kept tightly closed and the access of water in all forms must be prevented. It is suggested to use up once the package is open.
If you're ready to take the next step or Request Free Samples, Leave your message below and we’ll reply soon. 20+ years of chemical manufacturing & export experience, a partner you can trust.
在线联系供应商
Other supplier products
 |
Second generation bonding metal effect powder series | Introduction Standard provides customers with second-generation bonding metal powder with rich colors and excellent performance. The unique formul... |
 |
10-Undecenoic acid | CAS Number: 112-38-9. Molecular Formula: C11H20O2. Molecular Weight: 184.28 g/mol. Appearance: Colorless or pale yellow liquid. Melting Point: ... |
 |
Light Blue Wrinkle Color Powder Coating | Storage: Keep in a dry cool area (max. 25°C, 60% RH) Shelf life: 12 months Package type: Cardboard box Color standard:RAL RAL colors:RAL... |
|
|
Low Cure Powder Coating | Introduction We are a professional powder coating manufacturer specializing in Low Cure Powder Coating designed to deliver excellent finish qualit... |
 |
Polyester Powder Coating | Product Introduction:This series of products is a thermosetting powder coating made from a mixture of saturated polyester resin, corresponding curi... |
Same products
 |
Easy-cleaning Silicone-Modified Waterborne UV Resin | 卖方: Guangzhou Human New Material Science and Technology Co., Ltd | LUV533 is a high-performance, silicone-modified hexafunctional waterborne UV resinengineered to d... |
 |
Water-based Soft-Touch Resin for Consumer Electronics | 卖方: Guangzhou Human New Material Science and Technology Co., Ltd | Water-based Soft-Touch Resinis an advanced coating material formulated to deliver a luxurious, ve... |
 |
Conformal Coatings | 卖方: Guangzhou Human New Material Science and Technology Co., Ltd | The conformal coatingsprovide good adhesion to metal, PCB and other substrates after curing at ro... |
 |
Metalized & Laser Transfer coating | 卖方: Guangzhou Human New Material Science and Technology Co., Ltd | Metallized and laser transfer coatingsare designed with sustainability in mind, ensuring minimal ... |
 |
Hydrophilic coatings for Air Conditioner | 卖方: Guangzhou Human New Material Science and Technology Co., Ltd | A water-based coating combination applied on the surface of aluminum foil, which forms a layer wi... |
