Cantor Colburn LLP
Aqueous multi-stage emulsion copolymer compositions for use in joinery applications
The present invention provides aqueous compositions for use in coating wood joinery, especially for exterior use, comprising (a) one or more dihydrazide compounds in a total amount of from 0.5 to 4 wt. %, based on the total weight of composition solids and (b) of one or more aqueous multistage emulsion copolymers containing, as (i) a first stage, an emulsion copolymer having a glass transition temperature (Tg) via differential scanning calorimetry (DSC) of from −50 to 30° C., and containing, in copolymerized form one or more monoethylenically unsaturated phosphorous acid monomers and, one or more keto group containing amide monomers, and, as (ii) a second stage, an emulsion copolymer having a DSC Tg of at least 50° C. to 125° C., wherein the weight ratio of (i) the first stage to (ii) the second stage, based on copolymer solids, ranging from 50:50 to 90:10.
Rohm and Haas Company
C C C C C C C C
C08F C09D C08K C09D C09D C08F C09D C08F
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Ann R. James C. Danniebelle Jocelyn Wenqin
Hermes Bohling Haase Gruver Wang