Matt UV Clear Varnish, Topcoat: Matting Constancy and Cost Reduction by Neuburg Siliceous Earth

Transcription

1 Matt UV Clear Varnish, Topcoat: Matting Constancy and Cost Reduction by Neuburg Siliceous Earth Author: Barbara Mayer Wesupply material for good ideas

2 Contents Introduction Experimental Results Viscosity Matting Transparency Abrasion resistance Formulation costs Summary VM-1/

3 Status Quo Market Available Matting Agents DFT 6 µm DFT 12 µm [GU] Wax Silica A Silica B Silica C VM-1/

4 Status Quo Market Available Matting Agents DFT 6 µm DFT 12 µm [GU] Wax Silica A Silica B Silica C VM-1/

5 Status Quo Market Available Matting Agents Silica C offers the following properties: Low viscosity Excellent matting Relatively little influence of the film thickness on matting Good transparency Abrasion resistance Need for optimization? Formulation costs VM-1/

6 Objective Following requirement profile should be fulfilled by Neuburg Siliceous Earth Equivalent property profile as with Silica C Considerable cost reduction VM-1/

7 Base Formulation Guide formulation PW from BASF Laromer LR 8986 Description Aromatic epoxy acrylate 43.5 Laromer PO 8967 Polyether acrylate 43.5 Omnirad 184 Photo initiator α-hydroxyketone 3.5 Silica C Matting agent 8.7 EFKA FL 3741 Leveling agent 0.4 FoamStar ST 2438 Defoamer 0.4 Total % VM-1/

8 Partial Replacement of the Matting Agent Control % Silica C 1 : 4 Neuburg Siliceous Earth Silica C Neuburg Siliceous Earth Binder and Additives VM-1/

9 Formulation Variants Percent Control - Silica + Sillitin V 88 - Silica + Aktisil MAM Laromer LR Laromer PO Omnirad Silica C Sillitin V Aktisil MAM EFKA FL FoamStar ST Total PVC VM-1/

10 Filler Characteristics Silica C Sillitin V 88 Aktisil MAM Color X Color Y Color Z Particle size d 50 [µm] Particle size d 97 [µm] Oil absorption [g/100g] Surface Treatment organic none methacrylic silane VM-1/

11 Preparation / Application / Curing Dispersion: Dissolver with toothed disc 10 min at 4.2 m/s Application: On glass plate by using a hand roller On contrast cardboard charts by using a doctor blade Curing: Aktiprint L with Hg Lamp Intensity 120 W/cm Belt speed 10.0 m/min Six runs VM-1/

12 Viscosity at bei 11 s s-1 bei at 500 ss-1 [Pa s] Control Silica C + Sillitin V 88 + Aktisil MAM VM-1/

13 Gloss 60 at low Film Thickness Substrate: glass plate TSD DFT 6 µm DFT TSD 12 µm [GU] Control Silica C + Sillitin V 88 + Aktisil MAM VM-1/

14 Gloss 60 at Medium Film Thickness Substrate: contrast cardboard [GU] DFT TSD 25 µm TSD DFT 40 µm Control Silica C + Sillitin V 88 + Aktisil MAM VM-1/

15 Transparency on Black Substrate L* Displacement towards UV coat without matting agent 3 TSD DFT 20 µm DFT TSD 40 µm 2 [ L*] 1 0 without matting Control Silica C + Sillitin V 88 + Aktisil MAM VM-1/

16 Abrasion Resistance ASTM D 4060 Taber CS kg; 55 min -1 ; per 1000 revolutions [mm³] without matting Control Silica C + Sillitin V 88 + Aktisil MAM VM-1/

17 Abrasion Resistance DIN Taber S N; 55 min -1 ; per 100 revolutions [mm³] without matting Control Silica C + Sillitin V 88 + Aktisil MAM VM-1/

18 Cost Reduction Potential per liter (Germany) [%] Control Silica C + Sillitin V 88 + Aktisil MAM VM-1/

19 Summary In 100 % UV clear coats a partial replacement of the matting agent (silica) by Neuburg Siliceous Earth results in the following benefits: Significant reduction of the formulation costs at about 4 to 8 % Sillitin V 88 Standard product with a balanced property profile Aktisil MAM Similar to Sillitin V 88, with improved abrasion resistance VM-1/

20 Thank you very much for your attention! For more information please visit our website: HOFFMANN MINERAL GmbH P.O.Box D Neuburg (Donau) Phone +49 (0) Fax +49 (0) Internet: Our applications engineering advice and the information contained in this memorandum are based on experience and are made to the best of our knowledge and belief, they must be regarded however as non-binding advice without guarantee. Working and employment conditions over which we have no control exclude any damage claim arising from the use of our data and recommendations. Furthermore we cannot assume any responsibility for patent infringements, which might result from the use of our information. VM-1/