Table 1: Drying speed of INVERPUR/R.
The main features of INVERPUR/R can be
100 µM WFT (≈ 50 µM DFT) 150 µM WFT (≈ 70 µM DFT) Drying conditions INVERPUR 25% 72870
INVERPUR/R 30% 40301
Tack-free time
RT
40 °C
60 °C
RT
40 °C
60 °C
>8 h
>1 h
30 min
>8 h
>1 h
35 min
summarised as follows: • Product code: 45763 INVERPUR/R, twocomponent, RAL 9010 white • Mixing ratio: 30% w/w • Solid content (calculated typical value, ready to use product): 58.5% w/w and 47.9% v/v
Dry-to-handle time
>8 h
>2 h
35 min
>8 h
>3 h
40 min
Tack-free time
3h
20 min
10 min
3.5 h
20 min
10 min
Dry-to-handle time
4h
30 min
10 min
4.5 h
50 min
15 min
• Yield (calculated typical value): 393 m2/kg (ready to use product) • Gloss: ≥ 90 to 60° - ≥ 80 to 20° • VOC content (2010/75/EU): 144 g/l • Pot life: 2 hours at 20 °C.
Fast drying at low temperatures Table 2: Accelerated light resistance test on INVERPUR/R.
Product
Table 1 compares the drying times of
After 1700h (*)
Gloss
Gloss
Retention %
the standard INVERPUR top coat and the new INVERPUR/R top coat at different temperatures. Table 2 shows the results of the accelerated
INVERPUR 25% 72870
20°
83
47
57
60°
92
73
79
INVERPUR/R 30% 40301
20°
84
56
67
gloss retention values of INVERPUR/R after
60°
92
75
82
1700 hours in the Xenon test are comparable
(*) SAE J2527 test
light resistance test conducted on the two products. It should be noted that the gloss and
to those of Inverpur’s conventional waterbased technology. Further test results obtained by the INVERPUR/R top coat are
Table 3: Other technical characteristics of INVERPUR/R.
Test Humidity resistance Water immersion Impact test Flexibility
Chemical resistance
Reference ASTM D1735 ASTM D870
CNH MTM0108
Result
400 h
No blistering, rusting, visual defects. Adhesion Gt 0-1
300 h
No blistering, visual defects. Adhesion Gt 0-1
water-soluble products and that features
Direct impact > 60 kg/cm Reverse impact > 30 kg/cm
comparable to those of the traditional
Cylindrical mandrel
Drop, 24 h
Elongation > 10% Gasoline, Diesel, Motor oil, Antifreeze (sol. H2O 1:1), NaOH 5% w/w, HCl 10% w/w No visual defects, swelling, blistering. No adhesion loss
Buchholz hardness
ISO 2815
(*) tested on CRS, 50-70 µm DFT
50
Different fields of application
Note (*)
ASTM D2794 ASTM D522 B
shown in Table 3.
N. 73 - JANUARY/FEBRUARY 2022 - international PAINT&COATING magazine
> 100
The laboratory has succeeded in creating a product that cross-links at lower temperatures than those generally used for baking characteristics and a performance degree INVERPUR technology. Launched on the market in 2020, the INVERPUR/R top coat is also proving very popular with users that are actually equipped with a drying oven. Indeed, reducing drying process times and, above all, temperatures guarantees considerable savings in terms of time and energy. Conceived to meet market needs, this product has been optimised for application in harsh situations and it can now also be used in sectors other than those for which it was originally created.
