Eastman Solus 3050 performance additive. for waterborne systems

Transcription

1 Eastman Solus 3050 performance additive for waterborne systems

2 Eastman Solus 3050 performance additive for the transportation market A key challenge in the waterborne automotive (OEM & refinish) coatings market is balancing and optimizing performance and productivity without making critical compromises in either area. As a multifunctional additive, Eastman Solus 3050 performance additive is specifically engineered to help return formulation freedom to its users by bringing distinct value in both the performance and productivity arenas. Eastman Solus 3050 performance additive benefits Performance Better redissolve/strike-in resistance Superior flow and leveling Improved atomization Optimal metallic-flake control Increased flexibility in Al flake selection Productivity Reduced dry-to-touch time Improved wetting (fewer defects) Improved block resistance (early hardness) Fewer coats/thicker coats (increased sag resistance) Superior application consistency over wide range of climatic conditions 1. Performance When it comes to curb appeal, a smooth, bright-metallic basecoat is unmatched in eye-catching power. Formulations delivering this unmistakable presence require a finely tuned coatings formulation that delivers optimal performance and appearance without negatively impacting productivity in paint lines. Eastman Solus 3050 performance additive is a multifunctional performance additive specifically engineered to meet these needs through optimal metallicflake control, increased flexibility in metallic-flake selection, better redissolve/strike-in resistance, exceptional flow and leveling, and improved atomization. These benefits not only translate into superior-looking coatings, but can also mean superior performance and productivity. Eastman Solus 3050 performance additive is derived from natural and renewable cellulose, one of the most abundant, natural, and renewable biopolymers on earth. 2

3 Table 1 Improved metallic-flake orientation and strike-in resistance Basecoat only Basecoat + clear coat Description Additive level to total formulation Face brightness L*15 Flop index Face brightness L*15 Flop index L*15 change after clear coat OEM basecoat (see Section 3 for formulation) OEM control 0% % w/eastman Solus % % Refinish basecoat (see Section 3 for formulation) Refinish control 0% % w/eastman Solus % % A key aspect in achieving the brightest, most attractive basecoat is metallic-flake orientation. Because Eastman Solus 3050 performance additive has the ability to improve aluminum flake orientation, both our tests in OEM and refinish basecoats containing Solus 3050 showed much higher face brightness and flop index compared with the control (both before and after applying clear coat). After application of the clear coat, the face brightness and flop index of the control decrease considerably as the clear coat attaches to and disturbs the basecoat surface. Comparatively, the basecoat containing Solus showed less decrease in face brightness and flop index. This indicates that Solus 3050 improved the clear coat strike-in resistance of the basecoat (which is especially vital for good layer separation in three wet one-bake systems), enabling paint suppliers to meet OEM appearance specifications and increase their market share. 3

4 Superior flow and leveling The topographs below illustrate the superior flow and leveling in the early stages of drying a basecoat containing Eastman Solus 3050 performance additive vs. the control. The topographs were constructed using a non-contact surface profilometer after basecoats were spray-applied to smooth substrates. As illustrated, Solus 3050 can help minimize the wrinkling and shrinking that normally occurs during drying to help create a smoother dehydrated film. Figure 1 Control 8% Eastman Solus 3050 um on resin solids seconds 2 minutes 10 minutes The graph on page 5 shows the change in surface roughness as a film containing Eastman Solus 3050 performance additive and a film containing the control dries. Compared with the control, Solus 3050 provided superior flow and leveling early in the drying process and produced a smoother film after drying. 4

5 Graph 1 Surface roughness of drying waterborne coatings 3,000 2,500 RMS (nm) 2,000 1,500 1, Time (sec) Control Eastman Solus 3050 performance additive Ability to use lower-grade aluminum flake without sacrificing surface appearance Aluminum pigment is the single most expensive ingredient in an automotive metallic basecoat formulation. Since Eastman Solus 3050 performance additive can improve the aluminum pigment orientation and greatly enhance the performance of pigment, it is possible to utilize less expensive aluminum pigment in combination with Solus 3050 to achieve the same or superior appearance. Three basecoats were prepared and tested to illustrate this benefit. The first basecoat (A) contained a high-end automotive grade pigment (Stapa Hydrolan 8154 from Eckart GmbH). The second basecoat (B) was prepared using a less expensive industrial-grade aluminum pigment (Stapa Hydrolan 501). The third basecoat (C) was the same as the second with the addition of 8% Eastman Solus 3050 performance additive. As shown in Table 2 below, basecoat A with the more expensive flake has higher brightness at greater cost than basecoat B. The addition of Solus 3050 to the basecoat containing the less expensive flake produces basecoat C with a much higher brightness than basecoat A at less cost. An added benefit of including Solus 3050 in the formulation is the reduction in mottling. Table 2 Face brightness, flop index, and formulation cost A B C Description Face brightness (L*15 ) Flop index Formulation cost ($/gal) Color uniformity (mottling) Control with Stapa Hydrolan Mottling Control with Stapa Hydrolan Mottling 8% Eastman Solus 3050 performance additive with Stapa Hydrolan No mottling 5

6 Benefit analysis of Eastman Solus 3050 performance additive vs. alternative offerings Table 3 compares Eastman Solus 3050 performance additive with other offerings in terms of aluminum flake alignment (brightness and flop index) and strike-in resistance (change in brightness and flop index after applying the clear coat). Some of the comparisons were done in an OEM formulation which uses an acrylic swellable thickener and a clay thickener, and some were done using a refinish formulation which uses a rheology modified resin to impart aluminum flake alignment and strike-in resistance. Brightness and flop were measured and a number was assigned on a scale of 1 (did not deliver) to 5 (delivered the best) for each additive in terms of how well the benefits of aluminum flake alignment and strike-in resistance were delivered in the formulation. As shown in the table, Solus 3050 delivers the best performance. Table 3 Performance of Eastman Solus 3050 compared with other offerings Product Al flake alignment Strike-in resistance Use level Eastman Solus % Acrylic swellable thickener 2 2 6% Clay type thickener 2 3 1% Potential issues Solution must be prepared Tends to hold water & causes drying issues Water sensitive; viscosity unstable Wax # % Reduces gloss Wax # % Reduces gloss Wax # % Rheology modified resin 3 2 Up to 80% of resin solids Reduces gloss; hurts adhesion Expensive 4 times more than other resin at min. 15% level

7 2. Improving productivity Achieving the highest performance and appearance in automotive coatings is of little value if it drives down the productivity of an OEM paint line or a refinish shop. Utilizing Eastman Solus 3050 performance additive as a multifunctional additive for delivering both performance and productivity can help establish a new standard in coatings solutions. Specifically, Solus 3050 can drive improved productivity through shorter dry-to-touch times, superior application consistency over a wide range of climatic conditions, and improved wetting. These functional benefits translate into superior coatings that can dramatically reduce rework and boost throughput. Steel panels with e-coat were equally contaminated with a low surface tension liquid, BYK-088 defoamer. When a basecoat containing Eastman Solus 3050 performance additive was spray-applied to a contaminated panel, the contaminated areas were gradually wetted and covered by the basecoat. Under the same conditions, the control basecoat failed to wet or cover the contaminated areas. With an improvement in wetting on contaminated surfaces, reapplication can be minimized, shortening application time and lowering material costs. Figure 2 Improved wetting Control waterborne basecoat Waterborne basecoat with 6% Eastman Solus 3050 performance additive 7

8 Application consistency at varying climatic conditions Variations in climatic application conditions such as humidity and temperature can dramatically impact the overall performance of a coating. Eastman Solus 3050 performance additive can help reduce the impact of these varying conditions to maximize performance saving time, energy, and material. To illustrate this, Eastman prepared waterborne metallic basecoats and applied them, using Eastman s multimillion-dollar robotic spray booth, to e-coated steel panels. The paint was applied with an electrostatic bell over different temperature/humidity conditions. These conditions include wet, dry, and intermediate or standard conditions. The basecoat containing Solus 3050 not only gave higher face brightness at any given booth condition, it also provided a relatively stable color over a variety of application conditions ranging from wet to dry. Graph 2 Face brightness (L*15 ) Face brightness (L*15 ) Eastman Solus 3050 Control no CE Dry (28 C/50% relative humidity) Standard (24 C/65% relative humidity) Wet (20 C/80% relative humidity) Graph 3 Face brightness loss after clear coat -7-8 Face brightness loss after clear coat (L*15 ) Eastman Solus 3050 Control no CE Dry (28 C/50% relative humidity) Standard (24 C/65% relative humidity) Wet (20 C/80% relative humidity)

9 3. Experimental formulations Eastman Solus 3050 performance additive was not substituted in the OEM formulation for the other rheology modifiers (Viscalex & Laponite ). Solus 3050 is in addition to the other rheology modifiers. Solus 3050, as well as most wax-based additives, does not provide sufficient thixotropy or thickening effect on its own to allow replacement of the clays or thickeners. The refinish formulation utilizes a rheology-modified acrylic emulsion as the major binder, which serves as a thickening agent as well. Simply adding Eastman Solus 3050 performance additive to this formulation without any other additional thickeners is appropriate. Table 4 OEM basecoat formulation Raw materials Description Control With 6% Eastman Solus 3050 performance additive Macrynal VSM 6285 w/43wabdg Cytec acrylic emulsion Maprenal melamine 900/95 Ineos melamine crosslinker Viacryl VSC 6279 w/45wa Cytec styrene acrylic emulsion Viscalex HV30 solution a BASF acrylic swellable thickener Laponite RD Rockwood synthetic clay Tego Foamex 825 Tego defoamer N-methylpyrrolidone Solvent Additol XL 250 Cytec pigment wetting agent % Eastman Solus 3050 solution Performance additive Stapa Hydrolan 8154 AI pigment Eckart AI pigment % Dimethylethanolamine ph adjust Neutralizing solution DI water Water Eastman EB (butyl glycol) Solvent Total Pigment/binder ratio Percent of solids Melamine/total resin ratio VOC [g/l] a 10% Viscalex HV30 solution was made by mixing 64.2% of DI water, 2.5% of 10% dimethylethanolamine solution, and 33.3% of Viscalex HV30. 9

10 Table 5 Refinish basecoat formulation Raw materials Description Control Setalux 6803 AQ-24 With 8% Eastman Solus 3050 performance additive Rheology-modified acrylic from Nuplex Daotan VTM 1262/35WA PUD from Cytec Tego Foamex 825 Tego defoamer Stapa Hydrolan 8154 AI pigment Eckart AI pigment Additol XL 250 Cytec pigment wetting agent % Eastman Solus 3050 solution Performance additive % dimethyl ethanolamine Neutralizing solution Eastman EB (butyl glycol) Solvent DI water Water Total Pigment/binder Percent of solids VOC [g/l]

11 Call your Eastman representative today to learn more about the balancing and optimizing performance and productivity of Eastman Solus performance additive for your coatings application.

12 Eastman Chemical Company Corporate Headquarters P.O. Box 431 Kingsport, TN U.S.A. Telephone: U.S.A. and Canada, 800-EASTMAN ( ) Other Locations, (1) Fax: (1) Eastman Chemical Latin America 9155 South Dadeland Blvd. Suite 1116 Miami, FL U.S.A. Telephone: (1) Fax: (1) Eastman Chemical B.V. Fascinatio Boulevard VA Capelle aan den IJssel The Netherlands Telephone: (31) Fax: (31) Eastman (Shanghai) Chemical Commercial Company, Ltd. Jingan Branch 1206, CITIC Square No Nanjing Road (W) Shanghai , P.R. China Telephone: (86) Fax: (86) Eastman Chemical Japan Ltd. AIG Aoyama Building 5F Minami Aoyama Minato-ku, Tokyo Japan Telephone: (81) Fax: (81) Eastman Chemical Asia Pacific Pte. Ltd. #05-04 Winsland House 3 Killiney Road Singapore Telephone: (65) Fax: (65) Material Safety Data Sheets providing safety precautions, that should be observed when handling and storing Eastman products, are available online or by request. You should obtain and review the available material safety information before handling any of these products. If any materials mentioned are not Eastman products, appropriate industrial hygiene and other safety precautions recommended by their manufacturers should be observed. Neither Eastman Chemical Company nor its marketing affiliates shall be responsible for the use of this information, or of any product, method or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability or fitness of any product, and nothing herein waives any of the seller s conditions of sale. Eastman, Solus, and The results of insight are trademarks of Eastman Chemical Company. The following are registered trademarks of each listed owner: Hydrolan Eckart GmbH; Macrynal, Viacryl, Additol Daotan Cytec Industries Inc.; Mapranel INEOS Melamines GmbH; Visalex BASF Corporation; Laponite Rockwood Additives Limited; Setalux Nuplex Resins B.V.; Tego Evonik Industries AG. All other brands are the property of their respective owners. Eastman Chemical Company, M-567B 6/12