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Bayhydur® BL 2781

Bayhydur BL 2781 is a water-thinnable, aliphatic, blocked polyisocyanate. It is suitable for use in combination with Bayhydrol® polyols in the formulation of water-thinnable, lightfast, one-component polyurethane stoving coatings. Also as an additive to improve the flexibility, impact strength and adhesion of conventional aqueous stoving systems. Bayhydur BL 2781 is a further development of Bayhydur VP LS 2310 without cosolvent.

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Product Types

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Material

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General Characterization

Bayhydur BL 2781 is a water-thinnable, aliphatic, blocked polyisocyanate.
It is suitable for use in combination with Bayhydrol® polyols in the formulation of water-thinnable, lightfast, one-component polyurethane stoving coatings. Also as an additive to improve the flexibility, impact strength and adhesion of conventional aqueous stoving systems.
Bayhydur BL 2781 is a further development of Bayhydur VP LS 2310 without cosolvent.

Storage Conditions

Bayhydur BL 2781 should be stored in tightly sealed original containers and protected from freezing, heat, and foreign materials. The product is sensitive to freezing. Prolonged freezing can damage the product irreversibly. Prolonged storage at higher temperatures may result in a decrease of viscosity and/or an increase of average particle size, possibly resulting in sedimentation or coagulation. Recommended storage temperature is 5º-23ºC.

Sampling

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Packaging Type

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Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
Appearance clear to slightly cloudy
Density at 20^oC g/cm^3 approx. 1.06
Equivalent weight approx. 1,200
Blocked NCO content % approx. 3.5

Specifications

Property Name Test Method Unit Value
pH (10% solid content indemineralized water, 20^oC) approx. 9
Non-volatile content (1 g/1 h/105^oC) % 35 - 38
Viscosity at 23^oC, D=10s^-1 mPa∙s 1500 - 5000

Downloads

Technical Data Sheet
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com

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