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Below is a general purpose clear coating formulation. This kind of formulation is recommended for use where excellent flexibility, water resistance, good chemical and solvent resistance are needed. Either the resin or the hardener (or both) may be pigmented for brushable or sprayable coatings. The polyamide hardener may be partially or completely replaced by the recommended amounts of other polyamide hardeners to achieve the desired coating properties.
Typical Formulation Part A: | Kilograms |
D.E.R.™ 671-X75 Epoxy Resin Solution | 406.22 |
Methyl Isobutyl Ketone | 75.58 |
Total | 481.80 |
Part B: | |
Ancamide 220-X70 (Air Products) | 127.69 |
Xylene | 121.90 |
DOWANOL™-PM Glycol Ether | 88.07 |
Total | 337.66 |
Total Composite Blend: | 819.46 |
Typical Polyamide Cured Clear Coating Formulation (continued) |
Typical Properties as Formulated | Value |
Viscosity (cSt) | 80 – 100 |
Density (kg/m3) | 981 |
Solids (wt%) | 48.09 |
Solids, volume (%) | 42.44 |
VOC (g/l) | 510 |
MEK Double Rubs | 200 Pass |
Front Impact (in*lb) | 80 |
Reverse Impact (in*lb) | 40 |
Formulating Procedure:
Blend the resin and/or curing agent solution thoroughly with the solvents, filter if desired, and package in matching quantities. Slowly and thoroughly blend the curing agent solution into the resin solution. For maximum results, age the blended components for 15 minutes to 1 hour. And apply in a well ventilated area. The blend has a limited pot-life, but should be usable up to 8 to 12 hours with very little viscosity change under normal working conditions.
Brushing Thinner | Spraying Thinner | ||
Methyl Isobutyl Ketone (wt%) | 33 | Methyl Isobutyl Ketone (wt%) | 45 |
Xylene (wt%) | 33 | Xylene (wt%) | 50 |
DOWANOL-PM Glycol Ether (wt%) | 34 | DOWANOL-PM Glycol Ether (wt%) | 3.25 |
DOWANOL-DPM Glycol Ether (wt%) | 1.75 | ||
Total (wt%) | 100 | Total (wt%) | 100 |
If cured at room temperature, a 30-50 pm film will reach the following degree of cure:
Dry to Handle: 5-8 hours
Full Physical Properties: 3-4 Days
Full Resistance Properties: 6-8 Days.
This corresponds approximately to the following cure cycles at elevated temperatures; 25 minutes at 95°C 15 minutes at 120°C 10 minutes at 150°C 5 minutes at 175°C
1 Hour | 1 Day |
1 Week |
|
Mineral Spirits | 1 | 1-2 | 2 |
Xylene | 2S | 4S | – |
Nitroethane | 2S | 4S | – |
Polyglycol, Ether | 4S | – | – |
Polyglycol, Ether Acetate | 3S | 4S | – |
Methyl Ethyl Ketone | 4 | – | – |
n-Butanol | 2S | 4 | – |
Solvent Resistance:
Water Resistance:
Room Temperature 1/30 Days | Boiling Temperature 10/60 minutes | |
Ambient Cure (7 days) | 1 / 1 | 2 / 4S |
Bake Cure (30 min at 120°C) | 1 / 1 | 2 / 4S |
Below is a general purpose gloss enamel recommended for use on docks, boats and other marine fixtures requiring excellent water resistance. This formulation is suitable for brush and roller application and may also be thinned for spray application with the same solvent blends as shown for the clear coating system on the previous page.
Typical Formulation Part A: | Kilograms |
D.E.R.™ 671-X75 Epoxy Resin Solution | 318.07 |
Xylene | 152.71 |
Methyl Isobutyl Ketone | 94.73 |
Total | 565.51 |
Part B: | |
Ancamide 220-X70 (Air Products) | 133.29 |
Titanium Dioxide (e.g. Ti-Pure R900 ex. DuPont) | 207.36 |
Calcium Carbonate | 122.41 |
Pigment (e.g. iron-oxide Red) | 27.20 |
Bentone 34 (NL Industries) | 1.19 |
Cab-O-Sil TS-720 (Cabot Corporation) | 1.19 |
BYK P 104-S (BYK Chemie) | 0.60 |
Total | 493.24 |
Composite Blend Total | 1058.75 |