Features Water-dilutable aliphatic self-crosslinking baking type polyurethane resin
Bayhytherm® 3246 is used for the preparation of waterborne one-component stoving paint systems, such as waterborne primer surfacers or general industrial paints. Bayhytherm® 3246 is an NMP-free product further developed from Bayhytherm® 3146.
form of supply
About 46% dispersion in water, MPA, SN 100 (47.9 : 2.6 : 2.4 ), neutralized to salt with 1.1% DMEA
Specification
characteristic |
Numerical value |
unit |
testing method |
Acid value |
7 - 10 |
mg KOH/g |
DIN EN ISO 2114 |
Viscosity, 23°C (D=186s-1) |
100 - 1200 |
mPa·s |
DIN EN ISO 3219/A.3 |
Non-volatile content (1 g/1h/105 °C) |
45 - 47 |
% |
DIN EN ISO 3251 |
pH (1 : 4 dilution in deionized water) |
6.8 - 8.5 |
|
DIN ISO 976 |
other data
characteristic |
Numerical value |
unit |
testing method |
density |
about 1.07 |
g/ml |
DIN EN ISO 2811 |
visible appearance |
Light yellow-white cloudy |
|
|
Features/Applications
Bayhytherm® 3246 is used to formulate waterborne one-component stoving paint systems such as waterborne putty or general industrial paints. Films based on Bayhytherm® 3246 have exceptional impact strength, adhesion and recoatability. Bayhytherm® 3246 can also be used as an additive in traditional waterborne stoving systems to improve flexibility, impact strength and adhesion. The product has high reactivity, good pigment wetting and thermal stability. Because it thins easily, at spray viscosity, it offers advantages in solids and paint fill-in capabilities. Typical curing parameters are 30 minutes at 130°C. The product exhibits overbake stability up to 120 minutes at 190°C. Slight thermal yellowing may occur based on baking temperature and time.
compatibility
Bayhytherm® 3246 is compatible with eg Bayhydrol® U XP 2698 or UA 2856; with blocked polyurethane dispersions such as Bayhydur® BL XP 2706 or Bayhydur® BL 2867; and with amino resins such as Luwipal® 066LF, 072 or 0731) and Maprenal® MF 904 or MF 9152). However, compatibility should be tested beforehand.
1) BASF AG, Ludwigshafen
2) INDEOS Melamine Co., Ltd., Frankfurt
Solubility/Dilution
Bayhytherm® 3246 can be diluted with water, esters, ketones, alcohols, glycols and glycol ethers. However, the formulated solutions must be tested for storage stability.
store
- Store in original Covestro airtight containers.
- Recommended storage temperature: 5-23 ℃.
- Avoid freezing, heat and foreign substances.
General Information: This product is sensitive to freezing. Freezing will irreversibly damage the product. Prolonged storage at higher temperatures may result in a decrease in viscosity or an increase in average particle size, possibly resulting in precipitation or solidification.
storage time
Covestro declares that the product complies with the above "specification or characteristic values" for a period of 5 months from the date of shipment as stated on the shipping document, provided that the product is stored in full compliance with the requirements in the "Storage" clause above and handled properly Specifications or characteristic values stated in the terms (as applicable). The fact that a product exceeds the 5-month period above does not mean that it no longer meets the specifications or values set forth in the characteristic values. However, Covestro recommends that products older than 5 months from the date of shipment be tested prior to use to confirm that they still meet the values set in the specifications or characteristic values. Covestro makes no commitments for products older than 5 months from the date of shipment, nor does Covestro accept any responsibility or liability for non-conformance with the specifications or values set forth in the characteristic values.
Safety
This product data sheet applies only to the latest version of the corresponding safety document. Any updates to safety-related information consistent with legal requirements will only be reflected in the Safety Data Sheet, which will be updated and published. Information related to current classification and labelling, application and process methods, and more safety-related data can be found in the latest available safety data sheets.
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