November 7, 2025
| Dispersant Test Sheet | |||||||
| Test Name | Screening of Dispersants for Aqueous Filler Paste | ||||||
| Test Start Date | 2024.8.22 | Test End Date | 2024.8.23 | ||||
| To evaluate three fillers (calcium carbonate, talc, and aluminum hydroxide) in a resin-free filler paste system, with the inclusion of PU-166 aqueous polyurethane dispersion for testing. | |||||||
| Color Paste Formula | |||||||
| Calcium Carbonate Paste | |||||||
| Raw Material | 6220 | 6210 | 6070 | Note | |||
| Water | 27.8 | 27.8 | 27.8 | ||||
| Dispersant | 2 | 2 | 2 | ||||
| 4420 | 0.2 | 0.2 | 0.2 | ||||
| Filler | 70 | 70 | 70 | ||||
| Talc Paste | |||||||
| Raw Material | 6220 | 6210 | 6070 | Note | |||
| Water | 37.8 | 37.8 | 37.8 | ||||
| Dispersant | 2 | 2 | 2 | ||||
| 4420 | 0.2 | 0.2 | 0.2 | ||||
| Filler | 60 | 60 | 60 | ||||
| Aluminum Hydroxide Paste | |||||||
| Raw Material | 6220 | 6210 | 6070 | Note | |||
| Water | 27.8 | 27.8 | 27.8 | ||||
| Dispersant | 2 | 2 | 2 | ||||
| 4420 | 0.2 | 0.2 | 0.2 | ||||
| Filler | 70 | 70 | 70 | ||||
| Experimental Method | |||||||
| 1.Stir for 10 minutes and record the viscosity.. 2.Add the aqueous polyurethane resin at a resin-to-filler ratio of 3:7, and stir for 5 minutes. Record the viscosity. |
|||||||
| Test Result | |||||||
| Resin-Free Paste Viscosity(mpa.s ) | |||||||
| 34℃ | 6220 | 6210 | 6070 | Note | Stand for 24 hours | ||
| Calcium Carbonate | 109 | 472 | 100 | Dispersants 6210 and 6070 showed significant foaming | Dispersants 6220 and 6070 formed a hard sediment | ||
| Talc | 833 | 1830 | 67.1 | Dispersants 6220 and 6210 showed significant foaming | Dispersant 6210 resulted in a soft sediment, whereas 6070 produced a hard sediment. | ||
| Aluminum Hydroxide | 78.5 | 449.6 | 495.2 | Dispersants 6220 and 6070 formed a hard sediment | |||
| In the resin-free paste, dispersant 6070 demonstrated the best viscosity reduction with calcium carbonate and talc, while 6220 was most effective with aluminum hydroxide | |||||||
| Resin Paste Viscosity(mpa.s ) | |||||||
| 34℃ | 6220 | 6210 | 6070 | Note | |||
| Calcium Carbonate | 30 | 282 | 23.3 | ||||
| Talc | 766.3 | 268 | 10 | ||||
| Aluminum Hydroxide | 8.9 | 472 | 6.7 | ||||
| In the polyurethane-based paste,dispersant 6070 demonstrated the best viscosity reduction. | |||||||
| Conclusions | |||||||
| In the aqueous resin-free paste, dispersant 6220 provided the overall best performance in viscosity reduction. In the aqueous polyurethane dispersion-based filler paste system, dispersant 6070 provides good viscosity reduction. |
|||||||