Covestro Bayhydrol UH 650 Waterborne polyurethane dispersion Plastic adhesion Self-drying soft feel paint

Features Solvent-free aliphatic polyurethane resin aqueous dispersion Body
Binder for aqueous self-drying or force-drying primers for two-layer systems on plastics or as combination binder for elastic coatings
Supply Form about 50% aqueous solution

Specifications
Property             Value     Unit     Test Method
Outflow Time                                                                                
(23°C, 4mm cup)
Non-volatile content 48-52 % % DIN EN ISO 3251
(1g/1h/125°C)
pH             6-8 –         DIN ISO 976

Other Data*
Property             Value     Unit     Test Method
Density@20°C About 1.1 g/mL DIN EN ISO 2811
Minimum film forming temperature <0 °C °C DIN ISO 2115
(MFT)
*This data is general information and is not part of the product specification.

Features /app
The metal primer prepared by Bayhydrol® UH 650 can be mixed with two-component polyurethane varnish for two-coat coating system. It is characterized by strong adhesion to various plastic surfaces, Has good recoatability and water resistance. Metallic primers can be sprayed with a two-component polyurethane clearcoat after pre-drying at 5 minutes at 80°C or 15 minutes at room temperature. The minimum temperature for forced drying is 60°C. Bayhydrol® UH 650 is compatible with waterborne polyesters and certain acrylic dispersions. Since there are many types of resins to choose from, it is recommended to conduct a compatibility test.

Cleaning
Preparation and application equipment can be cleaned with water, alkaline cleaners or isopropyl alcohol.

Save
– Store in original seal
– Recommended storage temperature: 5-30℃
– Protect from frost, heat and foreign matter

Normal INFORMATION : Due to slight sedimentation may occur during storage, please homogenize the product thoroughly before use, e.g. stirring uniform. Containers must be kept airtight to prevent water vapor from evaporating and forming a film that cannot be redispersed. The product is sensitive to frost. Long-term freezing can cause permanent damage to the product. Long-term storage at high temperature may lead to a decrease in viscosity or an increase in average particle size, and may also cause precipitation or coagulation. Product may not be usable after contamination with certain bacteria, fungi or algae.

Save Time
When the product is stored in full compliance with the requirements of the above “storage” clause and handled properly, the product meets the requirements within 6 months from the date of transportation stated on the transportation document. Specifications or characteristic values ​​described in the “Specification or characteristic values” clause above, as applicable. If the product exceeds the above-mentioned 6-month period, it does not mean that it is not��Conforms to the set value in the specification or characteristic value. However, the manufacturer recommends that products older than 6 months from the date of shipment be tested before use to confirm that they still comply with the values ​​set forth in the specification or characteristic values. The manufacturer does not make any promises for products that have been shipped more than 6 months from the date of shipment, and does not assume any responsibility and liability for non-compliance with specifications or set values ​​​​in the characteristic values.

Security
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 on current classification and labelling, application and process methods, and further safety data can be found on the latest valid safety data sheet.