US 12,473,429 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 May 31, 2023, as Appl. No. 18/204,019.
Application 18/204,019 is a continuation of application No. 16/537,796, filed on Aug. 12, 2019, granted, now 11,685,828.
Prior Publication US 2023/0303823 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 63/00 (2006.01); C08G 59/50 (2006.01); C08K 3/013 (2018.01); C08K 5/00 (2006.01); C08K 5/17 (2006.01); C09D 163/00 (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)] 17 Claims
 
1. A two-component epoxy-based liquid formulation comprising:
a liquid epoxy resin composition comprising at least one liquid epoxy resin material comprising a mixture of: oxirane, 2,2′-[(1-methylethylidene)bis(4,1-phenyleneoxymethylene)]bis-, homopolymer, a formaldehyde polymer having (chloromethyl)oxirane and phenol, and an alkyl (C12-14) glycidyl ether the liquid epoxy resin material being present in an amount from 80-99.9 wt. %, a reactive diluent comprising oxirane 2,2′-[1,4-butanediylbis(oxymethylene)]bis structure, a silicone acrylate copolymer as a wetting and dispersing additive present in an amount from 0.1-1.0 wt. %, and a defoamer comprising naphtha (petroleum) heavy alkylate, whereby said 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 mixture comprising two or more liquid epoxy curing agents selected from the group consisting of liquid polyamines, liquid polyamine adduct curing agents, and liquid aliphatic amines, the liquid epoxy curing agent mixture is present in an amount from 80-100 wt. % based on a total weight of the liquid epoxy curing agent composition, the liquid epoxy curing agent mixture including a first epoxy curing agent comprising a mixture of: 4-tert-butylphenol and methyl alcohol, and a second epoxy curing agent comprising a mixture of: phenol 4-nonyl-branched; 1,3-benzenedimethanamine; benzyl alcohol; and phenol, and including an adhesion promoter comprising a diaminofunctional silane,
wherein the liquid epoxy resin composition and the liquid epoxy curing agent composition are mixed together in a stoichiometric ratio of 1.5:1 to 3.4:1 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.