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
 |
Powder coating series for vehicle compartment | Introduction With the development of environmental protection and energy conservation, the central environmental protection department and local g... |
 |
Metal powder coatings | IntroductionMetal powder coatings are specialized finishes designed for metal surfaces. Applied as a dry powder, they are electrostatically charged... |
 |
Frame & chassis powder coatings MT-A400 series | Product Overview: Weather-resistant pure polyester powder coatings designed for frame and chassis parts Coating characteristics: – High ... |
 |
IT industry powder coating | Introduction Brief description: Made of TGIC polyester, epoxy polyester mixed type, etc. as base materials Features: Excellent physical and m... |
 |
Flat matte MT-04916022 | Introduction No. MT-049/16022 Color White Surface Flat matte System Polyester Scope of application Lighting acc... |
Same products
 |
Trimellitic anhydride 97% | 卖方: Yufeng International Group Co., Ltd | Trimellitic anhydrideis a 2-benzofuran compound having oxo groups at the 1- and 3-positions and a... |
 |
Isobutyric Anhydride CAS 97-72-3 | 卖方: Yufeng International Group Co., Ltd | Product Name: Isobutyric Anhydride CAS No.: 97-72-3 Purity: 99% Molecular Formula: C6H10O3 Mo... |
 |
Isobutyric Acid CAS 79-31-2 | 卖方: Yufeng International Group Co., Ltd | Product Name:ISOBUTYRIC ACID Synonyms: 2-Methylpropanoic acid 79-31-2 Isobutanoic acid 2-Met... |
 |
2-Amino-2-methyl-1-propanol（AMP）CAS：124-68-5 | 卖方: Yufeng International Group Co., Ltd | AtYufeng, a trusted 2-Amino-2-methyl-1-propanol Factory & Supplier, we prioritize quality and... |
 |
Dimethyl sulfoxide (DMSO) CAS: 67-68-5 | 卖方: Yufeng International Group Co., Ltd | Yufengis one of the leading dimethyl sulfoxide suppliers and also a professional such manufacture... |
