Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- CASE Ingredients Functions
- Technologies
- Product Families
Applications & Uses
- Markets
- Compatible Substrates & Surfaces
- Special Properties and Uses
BECKOPOX™ EM 441 can only be used in combination with BECKOPOX™ EM 440 for good adhesive one-pack-stoving systems, e.g. primers with high corrosion protection, foil and packing lacquers. The elasticity of the system BECKOPOX™ EM 441/EM 440 is adjusted by variation of the mixing ratio.
- Suggested Uses and Processing Information
- BECKOPOX™ EM 441 is a modified epoxy resin which cures at high temperature. The resin system shows excellent adhesion onto most metal substrates, outstanding deep-drawing properties with good surface hardness, and corrosion protection. Due to this, BECKOPOX™ EM 441/EM 440 is preferably used in metal pre-coating systems like coil-coating or sheet-coating.
- Important other applications are stoving primers for corrosion protection, coatings for machineries, conveyors, tanks, pipes, fuel containers, collapsible tubes, electro-insulation varnishes and foil lacquers which resist high temperatures.
- The mixing ratio between BECKOPOX™ EM 441 and EM 440 can be between 1 : 1 and 6 : 1 (f.o.d.). Standard mixing ratio is BECKOPOX™ EM 441/EM 440 approx. 3 : 1. If the proportion of BECKOPOX™ EM 441 is increased, the flexibility of the resulting film increases too. Whereas if the amount of BECKOPOX™ EM 440 in this mixture is increased, the resistance against e. g. hot water improves, but flexibility declines. The system BECKOPOX™ EM 441/EM 440 can be modified with amino resins to increase curing speed but the storage stability of the resin mixture decreases at the same time. The system BECKOPOX™ EM 441/EM 440 (cured at temperatures around 200°C) is nonyellowing and can be pigmented with the usual pigments / fillers suitable for high-temperature stoving systems.
Acceleration of curing
Additions of approx. 1% BECKOPOX™ EH 610 (hardener), improves curing speed, especially at relatively low temperatures. The storage stability of this mixture is approx. 6 weeks only.
Dilution
Mixtures containing higher alcohols, acetic acid esters, ketones, glycol ethers and aromatic hydrocarbons are preferably used to dilute systems containing BECKOPOX™ EM 441/EM 440. An appropriate mixture consists of 40 parts xylene, 10 parts diacetone alcohol and 50 parts methoxypropanol. Aromatic solvents should not be used alone for dilution in order to avoid formation of a porous film with reduced anticorrosion resistance.
Properties
- Physical Form
- Typical Properties
Value | Units | Test Method / Conditions | |
Iodine Color Number | max. 3 | — | — |
Density (20°C) | approx. 1.07 | g/cm³ | — |
Flash Point | approx. 50 | °C | — |
Dynamic Viscosity (25 s⁻¹, 23°C, Not Continually Determined ) | 10000 - 18000 | mPa.s | — |
Dynamic Viscosity (25 s⁻¹, 23°C, Determined per Batch) | 13000 - 22000 | mPa.s | — |
Non-Volatile Matter Analogue (1h, 160°C, 1g) | 58 - 62 | % | — |
Storage & Handling
- Shelf Life
- 1 Year
- Storage and Handling
- At temperatures up to 25°C storage stability packed in original containers amounts to at least 365 days.
- When handling and processing epoxy resins and hardeners, the rules and regulations established by local authorities should be observed. A Material Safety Data Sheet is available on request.