ACEMATT for Water-Based Furniture and Parquet Coatings

Transcription

1 ACEMATT for Water-Based Furniture and Parquet Coatings Technical Information 169 L+L , vnd TI 169_us.indd 1. Jul 015; 14:6 Uhr , vnd TI 169_us.indd :6

2 Growing environmental awareness and legal constraints are requiring a major effort from all partners in the coatings industry. Attempts to meet these requirements range from a reduction of solvents to solid systems and the use of radiation-curing coatings. Another environmentfriendly option is the use of water-dilutable systems. These we will discuss in this bulletin. The tough requirements placed on these furniture and parquet coatings need continuous development. In addition to binders, additives also play an important role. In our research and technical service laboratory, we have carried out comprehensive experiments on the influence of matting agents on the formulation and on coating properties. The matting of water-based coatings using ACEMATT Water-based coatings are generally easy to matt, although their incorporation and stabilization do require special attention. At this point, we must mention dispersion, the adsorption of associative thickeners by silica matting agents, and storage stability. Efficiency and high transparency are required. These requirements can be satisfied through the choice of suitable matting agents. To demonstrate how our new matting agent ACEMATT 3300 satisfies these high requirements, we will apply two formulations that are used for industrial applications and contain conventional binders. For our experiments, we used a two-component PUR coating () and a UV-curing acrylic dispersion (). In addition to our new ACEMATT 3300, we also tested our well proven ACEMATT TS 100 and ACEMATT OK 50 plus two well-known competitor products. All tested coatings were adjusted to the same degree of gloss and the same viscosity. Efficiency.5.5 MM-concentration [%] MM-concentration [%] TS OK 50 Compet. A Compet.B 60 -reflectometer value: TS OK 50 Compet. A Compet. B 60 -reflectometer value: 15 Besides ACEMATT TS 100, which is known to be very efficient, ACEMATT 3300 also displays high matting power.

3 Thickener adsorption 5.0 Thickener-concentration [%] Thickener-concentration [%] TS OK 50 Compet. A Compet. B Unmatted 0.0 TS OK 50 Compet. A Compet. B Unmatted Viscosity at D (100/s) = 400 mpas Viscosity at D (100/s) = 100 mpas Because of its novel post-treatment, ACEMATT 3300 shows clearly reduced adsorption of associative thickeners compared to all other matting agents tested. Storage stability relative viscosity [%] TS OK 50 Compet. A Compet. B Unmatted relative viscosity [%] TS OK 50 Compet. A Compet. B Unmatted Post manufacturing 1W 40 C W 40 C Post manufacturing 1W 40 C W 40 C 3W 40 C 5W 40 C 3W 40 C 4W 40 C It is well known that the presence of silica matting agents in coatings usually results in an increase in viscosity. This behavior is particularly evident in forced-heat storage (40 C), where a reduction in viscosity caused by thickener adsorption can initially be observed. In our experiments, ACEMATT 3300 was the only matting agent to exhibit a largely stable viscosity behavior over a period of 4 or 5 weeks. 3

4 Anti-settling behavior 5 5 Grade sedimentation test TS OK 50 Compet. A Compet. B Grade sedimentation test TS OK 50 Compet. A Compet. B 1 = No phase separation = Loose sediment, easily dispersible 3 = Sediment, still redispersible 1 = No phase separation = Loose sediment, easily dispersible 3 = Sediment, still redispersible None of the matting agents produced a sediment that was not redispersible, only ACEMATT 3300 showed no separation of coating and matting agent in either of the two systems. Test conditions: centrifuge 14 h, 15 g, 35 C; according to our experience, this corresponds to 4 weeks of storage at 3 C. Transparency.3.3 Density (over black) Density (over black) TS OK 50 Compet. A Compet. B 1.8 TS OK 50 Compet. A Compet. B All of the products tested exhibited a high level of transparency, measured here as density, but slight advantages for ACEMATT TS 100 and ACEMATT 3300 could be discerned. Here the coloristic measured quantity density represents the change of jetness of a deep black substrate affected by the transparency of a coating. The higher the density, the higher the transparency. 4

5 Chemical resistance Deionized water Alcohol 48 % Coffee Red wine Red wine vinegar Average Deionized water Alcohol 48 % Coffee Red wine Red wine vinegar Average TS OK TS OK Compet. A Compet. A Compet. B Compet. B Average Average The test consisted of a 4-hour loading of the coatings with conventional chemicals. Resistance was measured as the degree of irreversible change based on the color difference ΔΕ*. Here, too, ACEMATT 3300 demonstrated its excellent suitability for these systems. Conclusions The experiments showed that in the tested coatings, our proven matting agents, ACEMATT TS 100 and ACEMATT OK 50 already achieve good results for the required properties. The use of ACEMATT 3300 offers additional advantages in the formulation of waterbased coatings, namely the minimization of thickener adsorption and improved storage stability and suspension behavior. All ACEMATT products can be quickly incorporated into water-dilutable coatings without problems. We recommend approximately 10 minutes of dispersion, preferably in the dissolver, at a circumferential speed of about 5 m / s. The formulations used in our laboratory and the characteristic physical-chemical data of the matting agents used are documented in the insert. 5

6 Example formulations containing ACEMATT 3300 Two component -PUR-coating /WC40-01 % b.w. Formulation Bayhydrol VP LS 34 (1) Water 10.3 Butyl glycol 1.00 BYK 08 () 0.60 Acrysol RM-8 W (3) 0.8 BYK 380 () 0.60 BYK 346 () 0.40 ACEMATT 3300 (4) 1.35 Crosslinker Bayhydur VP LS 336 (1) Acrylate dispersion UV-curing / WC % b.w. Formulation Craymul 716 (1) 85.0 Foamex 8 () 0.80 TEGO Airex 90 W () 0.30 Coapur 830 W / Water 1:1 (3).40 Surfynol 104 E (4) 0.50 Irgacure 184 / Butyl glycol 1:1 (5) 1.80 Aquacer 537 (6) 4.00 Zonyl FSJ / Water 1:9 (7) 0.50 Technical Data Viscosity (D=100/s) Trocknungszeit klebfrei 350 mpas ca. 1.5 h Water.70 ACEMATT 3300 (8) 1.80 Dry film thickness 30 μm reflectometer value 3 Technical Data Viscosity (D=100/s) 1300 mpas Drying 5 min 50 C UV-curing Dry film thickness Hg-lamp 100 W / cm, 5 m / min, 900mJ / cm² 30 μm Manufacturer: (1) Bayer Material Science, () BYK-Chemie, (3) Rohm & Haas, (4) Evonik, reflectometer value 15 Manufacturer: (1) Cray Valley, () Tego Chemie Service, (3) Coatex, (4) Air Products, (5) Ciba Speciality Chemicals, (6) BYK-Chemie, (7) DuPont, (8) Evonik, 6

7 Physico-chemical data of Silica ACEMATT for Water-based* Furniture and Parquet Coatings Properties Unit Method ACEMATT TS 100 ACEMATT 3300 ACEMATT OK 50 Competitor product A Competitor product B Manufacturing process Fumed Silica Fumed Silica Precipitated Silica Silica gel Silica gel Post-treatment None PDMS (Polydimethyl siloxane) Organic Microcrystalline Wax Microcrystalline Wax Pore volume ml / g NA NA NA 1.8 Agglomerate Particle size, d50 μm Laser diffraction ph value, 5 % DIN ISO * Oil absorption g /100g DIN ISO * 5% in Water / Methanol 1:1 7

8 This information and any recommendations, technical or otherwise, are presented in good faith and believed to be correct as of the date prepared. Recipients of this information and recommendations must make their own determination as to its suitability for their purposes. In no event shall Evonik assume liability for damages or losses of any kind or nature that result from the use of or reliance upon this information and recommendations. EVONIK EXPRESSLY DISCLAIMS ANY REP- RESENTATIONS AND WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, AS TO THE ACCURACY, COMPLETENESS, NON- INFRINGEMENT, MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE (EVEN IF EVONIK IS AWARE OF SUCH PURPOSE) WITH RESPECT TO ANY INFORMATION AND REC- OMMENDATIONS PROVIDED. Reference to any trade names used by other companies is neither a recommendation nor an endorsement of the corresponding product, and does not imply that similar products could not be used. Evonik reserves the right to make any changes to the information and/ or recommendations at any time, without prior or subsequent notice. ACEMATT is a registered trademark of Evonik Industries or its subsidiaries. Europe / Middle-East / Africa / Latin America Evonik Resource Efficiency GmbH Business Line Silica Rodenbacher Chaussee Hanau-Wolfgang Germany phone fax ask-si@evonik.com North America Evonik Corporation Business Line Silica 99 Jefferson Road Parsippany, NJ USA phone fax ask-si-nafta@evonik.com Asia / Pacific Evonik (SEA) Pte. Ltd. Business Line Silica 3 International Business Park #07-18, Nordic European Centre Singapore phone fax ask-si-asia@evonik.com L+L , vnd TI 169_us.indd 1. Jul 015; 14:6 Uhr