New Basonat Polyisocyanate for Faster Handling. Dr. A. Steinbrecher, BASF SE, Ludwigshafen

Transcription

1 New Polyisocyanate for Faster Handling Dr. A. Steinbrecher, BASF SE, Ludwigshafen

2 BASF polyisocyanates for 2k waterborne coatings 2k waterborne coating Polyol + = Polyisocyanate A-Component Crosslinker Coating Properties Large influence by polyol, since main component plays decisive role in overall performance by complementing properties of dispersion e.g. hardness, dry speed, resistance, appearance, influenced by both components 2

3 BASF polyisocyanates for 2k waterborne coatings Polyisocyanate building blocks Diisocyanate R High Vapor Pressure Toxicity O R N R N N O O R BASONAT Aliphatic Polyisocyanate Functionality Stability HDI Hexamethylene diisocyanate Trimerization enlargment step HDI Trimer Viscosity, Chemical Drying Hardness IPDI Isophorone Diisocyanate IPDI Trimer Hardness, Physical Drying Viscosity 3

4 BASF polyisocyanates for 2k waterborne coatings Waterborne Technology Technical Solution : PIC modification via reaction with a reactive emulsifier Chemistry Dispersibilty Aqueous system H Emulsifier NH-CO Emulsifier Emulsifier acts as : - a surfactant - a protecting layer + Dispersible via mechanical or hand mixing Pot-life of several hours 4

5 BASF polyisocyanates for 2k waterborne coatings Playing with the toolbox HDI Emulsifier IPDI Emulsifier Ionic Non-ionic Chemically Incorporated Physical Mixture Selection of building blocks to fulfill a multitude of demands Isocyanate Monomers: HDI and IPDI Various types of oligomers 5

6 BASF polyisocyanates for 2k waterborne coatings to meet diverse requirements From Waterborne Standard HW 1 NH-CO Emulsifier LR 956 Handling LR 98 HW Hardness & drying time Better incorporation Less foam König Hardness LR 956 to products for specific requirements 2 2h 4h 1d 7d +15h, 6 C HW 1 LR 956 LR 986

7 Water Emulsifiable es Hydrophilic types HW 1 HW 18 PC LR 956 LR 98* Solids Content [DIN EN ISO 3251] 1 % 79-81% 1 % 79-81% (%) [DIN EN ISO 1199] 16,5 17,5 13, 14, 17,5 18,5 11,5 12,5 Viscosity (mpas, 23 C) [DIN EN ISO 3219] (~8%) Platinum cobalt color (Hazen) [DIN ISO 6271] < 1 < 4 < 4 Key Properties Excellent potlife Excellent potlife, better incorporation Simplified Incorporation, low foaming Fast drying, excellent hardness * Preliminary values 7

8 Recommended combinations with BASF Polyols for 2K wb applications Resin Luhydran S938T Luhydran S945T Description APEO-free, good resistance to chemicals, water, blocking, good potlife APEO-free, good resistance to chalking, chemicals; colour brightness stability; broad compatibility MFT [ C] 6 25 ph Solids Content [%] OH (solids) [mg KOH/kg] 1 1 Acid value (solids) [mg KOH/kg] n.a. n.a. Joncryl OH 8311 Good adhesion and outdoor durability Joncryl OH 8312 Long potlife, low solvent levels, good chemicals, scratch and block resistance

9 LR 98 Gloss HW 1 Potlife Dry to touch LR 956 LR 98 Flexibility Final Hardness Through Dry Hardness Development Based on comparisons in Luhydran S 938 T Joncryl OH 8311 Joncryl OH 8312 Faster handling with long potlife and high final hardness 9

10 LR 98 Improved drying speed Dry Time [h] Dry Time [h] Through Dry Sand Dry HW 1 LR 956 LR 98 HW 1 LR 956 LR 98 Luhydran S 938 T Index: 1, r.t. Joncryl OH 8312 Index: 1, r.t. Fast Surface Drying 1

11 LR 98 Hardness Development König Hardness h 4h 6h 1d 2d 3d Luhydran S 938 T Index: 1, r.t. 6d 7d +15h, 6 C König Hardness h 4h 6h 1d 2d Joncryl OH 8311 Index: 1, r.t. 6d 7d +15h, 6 C HW 1 LR 956 LR 98 Early Hardness for Early Handling 11

12 LR 98 Potlife Increase Potlife [h] Potlife [h] HW 1 LR 956 LR 98 HW 1 LR 956 LR 98 Luhydran S 938 T Index: 1, r.t. Joncryl OH 8311 Index: 1, r.t. Long Potlife Potlife determination: Drawdowns in 1h intervals after formulation; Curing: 1h, 6 C; MEK double rubs after 1d at r.t. 12

13 LR 98 Keep the gloss high 1 Gloss at 6 on b/w card HW 1 LR 956 LR 98 Luhydran S 938 T Joncryl OH 8311 Joncryl OH 8312 Keeping the gloss high 13

14 LR 98 and the hardness up König Hardness König Hardness HW 1 LR 956 LR 98 HW 1 LR 956 LR 98 Luhydran S 938 T Index: 1, r.t. Joncryl OH 8312 Index: 1, r.t. and the hardness up 15h, 6 C 2 min, 14 C 14

15 LR 98 Further Information Please meet us in Hall # 7A, Booth # 411 For further questions and details please ask our technical marketing team: Daniel Flojhar Inge Krämer Rainer Erhardt Leendert Berkhout Linda Guitman Tunja Jung, Luhydran and Joncryl are registered trademarks of BASF SE 15