Process for variable applications of coating compositions with a three or more plural component apparatus

A process for making and applying a coating composition using a plural component apparatus comprising choosing at least two non-like components for the coating composition from components in the plural component apparatus, the plural component apparatus having at least one binder component, at least one hardener component, and at least one component being a binder or a hardener, such component having a different reactivity from its like component A or B, selecting a mixing ratio for the at least two non-like components of the coating composition and mixing the components of the coating composition while applying it to a substrate, whereby a plurality of coating compositions with varying properties can be made and applied from the components in the plural component apparatus.

EXAMPLES All products mentioned in the Examples are commercially available from Akzo Nobel Coatings Inc. 
 Example 1 
 PUR Clearcoat with Varying Dryspeed The following three components were prepared: Component A (1) consists of 90 volume parts Autoclear® 1, based on an acrylic polyol binder and 10 volume parts Autocryl® Medium Reducer. Autoclear® 1 is based on an acrylic polyol. Component B (1), the slow hardener consists of 60 volume parts Autocryl® Hardener and 40 parts Autocryl® Medium Reducer. Autocryl® Hardener is a commercial available Isocyanate hardener based on a IPDI and HDI trimer mixture. Component C (1), the fast hardener consists of 60 volume parts of Autocryl® Rapid Hardener, based on the same Isocyanate mixture but consists a metal catalyst, and 40 parts Autocryl® Medium Reducer Using the ValueMix plural component apparatus of Graco, the above-mentioned components in various ratios set forth in the table below were mixed and immediately applied to a substrate, without changing the components on the plural apparatus. They gave the following results: 1 Vol. mix. Ratio A (1) :B (1) :C (1) Speed (drytime at 140° F.) Job size 4:2:0 Standard (35 min. bake) Full resprays. 4:1:1 Medium (30 min. bake) 3-5 panels 4:0:2 Rapid (25-30 min. panel, spots & small bake) parts 
 Example 2 
 PUR Clearcoat with Varying Dryspeed for Poor Airflow and for Downdraft Spraybooths The following components were prepared: Component A (2) consists of Autoclear® 1 a product which can be used in environments with poor airflow as well as in spraybooths with a high airflow rate downdraft spraybooth) by switching the mixing ratio. Component B (2) consists of Autoclear® 1 Rapid based on the same acrylic binder system as Autoclear® 1 however with as major difference a higher catalyst level. Component C (2), Hardener consists of 50 volume parts of Autocryl® Hardener Rapid and 50 parts Autocryl® Medium Reducer Using the ValueMix plural component apparatus of Graco the above-mentioned components in various ratios set forth in the table below were mixed and immediately applied to a substrate, without changing the components on the plural apparatus. They gave the following results: This example shows that the cure speed differences and thus flexibility for the repair process can be obtained by simply changing the mixing ratios of components. 2 Vol. mix. Speed (drytime at 140° F., Ratio bake/ A (2) :B (2) :C (2) 70° F. airdry conditions) Job size 5:0:2 Standard (260 min. airdry) Full respray (poor airflow). 5:5:4 Medium (190 min. airdry) 3-5 panels (poor airflow) 0:5:2 Fast (115 min airdry) panel, spots & small parts (poor airflow). 3:0:2 Standard (32 min bake) Full respray (downdraft booth) 3:3:4 Medium (23 min bake) 2-5 panels (downdraft booth) 0:3:2 Fast (12 min bake) Spots & small parts (downdraft booth) 
 Example 3 
 PUR Primer for Surfacer and Sealer Purposes The following three components were prepared: Component A(3): Colorbuild® Component B(3), Sanding Hardener consists of 50 volume parts Colorbuild® Surfacer Hardener and 50 volume parts Colorbuild® Surfacer Activator. Component C(3), Wet-in-wet Hardener consists of 50 volume parts Colorbuild® Sealer Hardener and 30 volume parts Autocryl® Medium Reducer. Using the ValueMix plural component apparatus of Graco the above-mentioned components in various ratios set forth in the table below were mixed and immediately applied to a substrate, without changing the components on the plural apparatus. They gave the following results: 3 Vol. mix. Ratio Drytime (time to A (3) :B (3) :C (3) sand at 70° F.) Flow Job type 3:2:0 Fast (180 min.) Moderate Spot were severe (3 coats) sanding is needed. 8:2:4 Medium (210 min.) Good Area where light (2 coats) sanding is needed 5:0:4 Slow (235 min) Very Area for wet-in wet (1 coat) good application. 
 Example 4 
 PUR Primer with Shading and Surfacer—Sealer Possibilities Component A( 4 ): Colorbuild® White Component B (4) : Colorbuild® Black Component C (4) , Sanding Hardener consists of 50 volume parts Colorbuild® Surfacer Hardener and 50 volume parts Colorbuild® Surfacer Activator. Component D (4) , Wet-in-wet Hardener consists of 50 volume parts Colorbuild® Sealer Hardener and 30 volume parts Autocryl® Medium Reducer. Using the ValueMix plural component apparatus of Graco the above-mentioned components in various ratios set forth in the table below were mixed and immediately applied to a substrate, without changing the components on the plural apparatus. They gave the following results: 4 Vol. mix. Ratio Drytime (time to Color Job type/ A (5) :B (5) :C (5) :D (5) sand at 70° F.) primer Car color 3:0:2:0 Fast (180 min.) White Spot, sanding/ (3 coats) Light car colors. 0:8:2:4 Medium (195 min.) Black Small area, light (2 coats) sanding, dark car colors. 5:5:0:8 Slow (260 min.) Grey Area, wet-in-wet, (1 coat) medium light colors.