Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- CASE Ingredients Functions
- Technologies
- Product Families
Applications & Uses
- Applications
- Cure Method
- Uses
In combination with aliphatic polyisocyanates air-drying and oven-drying two-component
primers with excellent filling properties, quick drying and good adhesion to steel, aluminum and
zinc that give good results in the condensed moisture test and salt spray test. These types of
two-component primers are used preferably wherever maximum corrosion resistance and
adhesion are required.
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Viscosity | 12.000-17.000 | mPas | AV-F-V005 |
| Color Value (Gardner) | Max. 2 | - | AV-F-F007 |
| Density | 1.07 | g/ml | AV-F-0D001 |
| Flash point | 36 | °C | AV-F-f006 |
| Hydroxyl Content | 6 | % | Relative to NVC |
| Hydroxyl Content | 200-250 | % | Relative to NVC |
| Non Volatile Content | 72 | w % | AV-F-F003 |
Technical Details & Test Data
- Film Properties
In combination with aliphatic polyisocyanates like „Desmodur N“ primer systems are obtained
that give a coating thickness of approx. 15-20 my as wet-in-wet coatings, 25-50 my as primers
or 200-300 my (thick coating) as spray fillers. They are used for instance for automotive
refinishes, prime coats for busses (composite structure), streetcars and airplanes.- Pigmentation
All neutral pigments and fillers are suitable for pigmentation. Basic pigments and pigments
containing soluble metallic compounds may have a catalytic effect on curing and shorten the
pot life of finished mixed batches.- Mixing ratio with polyisocyanate
Assuming equivalent reaction of the reactive groups (NCO:0H = 1:1), the following formula
applies for the calculation of the added amount of polyisocyanate (relative to 100 parts by
weight of SYNTHALAT-A 200, solid):
42 X 100 X 6.0
17 X NCO %
42 = molecular weight of the NCO groups
17 = molecular weight of the OH groups
6.0 = hydroxyl content of SYNTHALAT-A 200 in % relative to non-vol.
components
Best results are obtained with a mixing ratio of 100 parts by wt. of SYNTHALAT-A 200 (form in
which delivered) to 64 parts by weight of Desmodur N 75%. An undercuring or overcuring of up
to 20% has only little influence on film properties.
Packaging & Availability
- Supplied AS
72% in xylene/shellsol A/butoxyl (2:2:1)
Storage & Handling
- Storage
If properly stored at least one year.