Process for preparing latex functionalized with phosphorus acid and photoinitiator groups
OwnerMatthew Belowich, Meghan Koback +2inventors
InventorsMatthew Belowich, Meghan Koback, Jordan Stracke, Joseph Tanzer
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Abstract
The present invention is a process for preparing a stable aqueous dispersion of polymer particles comprising structural units of a phosphorus acid monomer or a salt thereof and structural units of a photoinitiator monomer. Gloss retention of paints containing the latex prepared by the process of the present invention are improved over paints that do not have photoinitiator chemically bound to the latex particles.
Claims9
A process comprising forming, by way of multistage emulsion polymerization, a stable aqueous dispersion of acrylic-based polymer particles functionalized with from 0.2 to 5 weight percent structural units of a phosphorus acid monomer and from 0.05 to 10 weight percent structural units of a photoinitiator monomer based on the weight of the polymer particles, which structural units of the phosphorus acid monomer and the photoinitator monomer arise from copolymerization of a phosphorus acid monomer and a photoinitiator monomer in the same stage.
Dependencies are inferred from the claim text.