The 165 Staphylococcus isolates were screened for BAC, BZT and, CHDG resistance.
The MIC inhibiting 90% of isolates (MIC90S) tested for BAC, BZT and CHDG in these bacteria were 64 [micro]g/mL, 16 [micro]g/mL, and 2 [micro]g/mL, respectively.
5,14) The MICs of three test disinfectants against our Staphylococci isolates were [less than or equal to] 64 [micro]g/mL, which is lower than concentrations recommended for use (2000, 1000, and 5000 [micro]g/mL for BAC, BZT, and CHDG, respectively).
BZT 3 R: Experimental (noncommercial) hydroxyphenyl benzotriazole UV absorber fully functionalized with primary hydroxyl, expected to show the highest retention in the topcoat.
BZT 1 R: Partially (50%) primary hydroxyl functionalized Benzotriazole UV absorber, expected to exhibit 50% retention in topcoat on TPO.
Its lower molecular weight versus TZ 1 R gives it a high specific extinction versus both TZ 1 R and BZT 2 UR.
As expected, none of the primary hydroxyl-functional BZT 3 R and HALS 1 R were extractable, indicating 100% reaction with the isocyanate crosslinker.
DETERMINATION OF UVA AND HALS REACTABILITY: In order to determine the potential for reactability of the commercial "reactable" UV absorbers, 3% each of TZ 1 (R) and BZT 1 (R) were incorporated into the 1 K silane clearcoat, drawn down over glass, and cured at 125[degrees]C for 30
The structure of the BZT 1 (R) includes a primary hydroxyl end group; however, only approximately 39% of the chromophore consists of this monoester structure.
Higher losses over TPO occurred for both HALS 2 (UR) and BZT 2 (UR), indicating further migration into the TPO during cure.
Analogous results were obtained for the reactable benzotriazole UV absorber BZT 1 (R) versus the nonreactable benzotriazole BZT 2 (UR).
light stabilizers are used in automotive coatings and plastics.