US 12,441,910 B2
Silicone-based barrier compositions
Michael P. Tate, Midland, MI (US); Zhifeng Bai, Houston, TX (US); Jodi M. Mecca, Midland, MI (US); Tirtha Chatterjee, Collegeville, PA (US); Yiyong He, Midland, MI (US); Michael Brasseur, Midland, MI (US); Sudhakar Balijepalli, Midland, MI (US); and John J. Rabasco, Collegeville, PA (US)
Assigned to DOW GLOBAL TECHNOLOGIES LLC, Midland, MI (US); DOW SILICONES CORPORATION, Midland, MI (US); and ROHM AND HAAS COMPANY, Collegeville, PA (US)
Appl. No. 17/624,318
Filed by DOW GLOBAL TECHNOLOGIES LLC, Midland, MI (US); DOW SILICONES CORPORATION, Midland, MI (US); and ROHM AND HAAS COMPANY, Collegeville, PA (US)
PCT Filed Jul. 1, 2020, PCT No. PCT/US2020/040401
§ 371(c)(1), (2) Date Dec. 31, 2021,
PCT Pub. No. WO2021/003205, PCT Pub. Date Jan. 7, 2021.
Claims priority of provisional application 62/870,111, filed on Jul. 3, 2019.
Prior Publication US 2022/0363945 A1, Nov. 17, 2022
Int. Cl. C09D 183/06 (2006.01); C09D 5/02 (2006.01); C09D 7/61 (2018.01)
CPC C09D 183/06 (2013.01) [C09D 5/028 (2013.01); C09D 7/61 (2018.01)] 18 Claims
 
1. A liquid applied, air and water barrier coating composition, the liquid coating composition comprising:
(i) a crosslinked polysiloxane dispersion of:
a reaction product of (a) a siloxane polymer having at least two —OH groups per molecule, or a polymer mixture having at least two —OH groups per molecule, and having a viscosity of between 5000 to 500,000 mPa·s at 21° C., and (b) at least one self-catalyzing crosslinker reactive with component (a), and
additionally comprising (c) a surfactant and (d) water;
(ii) a combination of rheology modifiers in an amount of from 0.25 to 5 wt. % of the composition, comprising one or more hydrophobically modified alkali swellable emulsions in an amount of from about 0.1 to 0.36 wt. % of the composition and one or more other rheology modifiers; and
at least one of the following ingredients:
(iii) one or more fillers selected from the group consisting of colloidal silica, fumed silica, precipitated silica, diatomaceous earths, ground quartz, kaolin, calcined kaolin, wollastonite, hydroxyapatite, calcium carbonate, hydrated alumina, magnesium hydroxide, carbon black, titanium dioxide, aluminium oxide, vermiculite, zinc oxide, mica, talcum, iron oxide, barium sulphate, slaked lime, and mixtures thereof; and/or
(iv) one or more stabilizers.