US 11,685,828 B2
Epoxy based moisture vapor barrier and primer
Yunbo Chen, Woodbridge, CT (US); and Randall Bright, Naugatuck, CT (US)
Assigned to LATICRETE INTERNATIONAL, INC., Bethany, CT (US)
Filed by LATICRETE INTERNATIONAL, INC., Bethany, CT (US)
Filed on Aug. 12, 2019, as Appl. No. 16/537,796.
Prior Publication US 2021/0047509 A1, Feb. 18, 2021
Int. Cl. C08L 63/00 (2006.01); C08G 59/50 (2006.01); C09D 163/00 (2006.01); C08K 5/17 (2006.01); C08K 3/013 (2018.01); C08K 5/00 (2006.01)
CPC C08L 63/00 (2013.01) [C08G 59/50 (2013.01); C09D 163/00 (2013.01); C08K 3/013 (2018.01); C08K 5/0025 (2013.01); C08K 5/17 (2013.01); C08L 2201/14 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A two-component epoxy-based liquid formulation comprising:
a liquid epoxy resin composition comprising,
a reactive diluent modified liquid epoxy resin present in the liquid epoxy resin composition in an amount from 80 wt. % or more comprising a C12-C14 aliphatic chain glycidyl ether reactive diluent modified bisphenol-A/F based liquid epoxy resin formed by mixing together: oxirane, 2,2′-[(1-methylethylidene)bis(4,1-phenyleneoxymethylene)]bis-homopolymer present in an amount from 61-71 wt. %; a formaldehyde, polymer with (chloromethyl)oxirane and phenol present in an amount from 14-24 wt. %; and alkyl (C12-14) glycidyl ether present in an amount from 9-19 wt. %, whereby weight percentages are based on a total weight of the reactive diluent modified liquid epoxy resin,
an epoxy functional reactive diluent present in the liquid epoxy resin composition in an amount from 5-15 wt. % to reduce viscosity and surface tension,
an adhesion promoter present in the liquid epoxy resin composition in an amount from 0.4-3.0 wt. %,
a defoamer present in the liquid epoxy resin composition in an amount from 0.2-1.0 wt. %,
a wetting and dispersing additive comprising a silicone acrylate copolymer present in the liquid epoxy resin composition in an amount from 0.1-1.0 wt. %,
whereby all weight percentages are based on a total weight of the liquid epoxy resin composition; and
a liquid epoxy curing agent composition comprising,
a liquid epoxy curing agent present in the liquid epoxy curing agent composition in an amount from 80 wt. % or more,
an adhesion promoter present in the liquid epoxy curing agent composition in an amount from 0.5-3.0 wt. %,
whereby all weight percentages are based on a total weight of the liquid epoxy curing agent composition;
wherein the liquid epoxy resin composition and the liquid epoxy curing agent composition are mixed together to provide a dual functioning single coating epoxy-based formulation that, when applied to a substrate as the single coating and cured, simultaneously acts as both a moisture vapor barrier and a primer.