Concentrated aqueous nanocomposite dispersions for barrier coatings
A technology of nano-composite materials and dispersions, applied in paper coatings, polyester coatings, coatings, etc., can solve the problems of reducing tire air permeability
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Embodiment 1A
[0053] Example 1A: 5% solids polyester nanocomposite using SCPX-2973 montmorillonite slurry
[0054] In an 8oz jar, weigh 0.02g 880 (35.2%, Rohm & Haas), 0.05g 882 (17.1%, Rohm & Haas) and 41.54 g distilled water. Add a stir bar and stir the solution until the Acusol material dissolves. To this solution was added 5.65 g of polyester latex (Eastek 1000, Eastman) and 1 drop Blend of PSA 336 (Air Products, 100%). Mix the resulting solution thoroughly.
[0055] To the above solution, 14.25 g of montmorillonite SCPX-2973 slurry (9.21% silicate filler) was mixed with 3.49 g of glycine (Lab Safety Supply, 20 wt% glycine) and 10 g of distilled water. Using a stir bar, the resulting solution was stirred for 1 hour and 1 drop of Mergal 680 (Troy Chemical Corporation, 26.3 wt% biocide) was added. The percent solids of the formulations are measured as 5.0% using standard techniques.
[0056] After applying this coating solution to a polyester film substrate and allowing to dry, ...
Embodiment 1B
[0058] Example 1B: 8% solids polyester nanocomposite using SCPX-2973 montmorillonite slurry
[0059] In an 8oz jar, weigh 0.04g 880 (35.2%, Rohm & Haas), 0.08g 882 (17.1%, Rohm & Haas) and 37.4 g distilled water. Add a stir bar, and stir the solution until Material dissolves. To this solution was added 9.0 g of polyester latex (Eastek 1000, Eastman) and 1 drop Blend of PSA 336 (Air Products, 100%). Mix the resulting solution thoroughly.
[0060] To the above solution, 22.8 g of montmorillonite SCPX-2973 slurry (9.21%) was mixed with 5.59 g of glycine (Lab Safety Supply, 20%). The resulting solution was stirred with a stir bar for 1 hour, and 1 drop of Mergal 680 (Troy Chemical Corporation, 26.3 wt%) was added. The percent solids of the formulation was measured as 8.1% using standard techniques.
[0061] After applying this coating solution to a polyester film substrate and allowing to dry, the coating contained 45.4 wt% polyester, 35.1 wt% filler, 18.7% glycine, 0....
Embodiment 1C
[0063] Example 1C: Polyester Nanocomposite Using 8% Solids of SCPX-2973 Smectite Slurry Concentrated from Example 1A
[0064] 50 g of the nanocomposite from Example 1A was placed in an 8 oz jar. The jar with the lid removed was then placed in a water bath at 95°C for 90 minutes while stirring. The internal temperature of the formulation was maintained at 75°C. After the allotted time, remove the formulation from the water bath, and leave the lid back on overnight. The percent solids of the concentrated formulations were measured at 8.3% using standard techniques.
[0065] After applying this coating solution to a polyester film substrate and allowing to dry, the coating contained 45.4 wt% polyester, 35.1 wt% filler, 18.7% glycine, 0.3% PSA336 wetting agent, 0.2wt% 880, 0.2wt% 882 and 0.05wt% Mergal680 antimicrobial agent.
[0066] use OXTRAN 2 / 20 module, measures oxygen transmission rate (OTR). At 1atm, 0%RH, 23℃, OTR is 5.0cc / m 2 -sky. At 0% RH, 23°C, the permea...
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