C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 283/00 (2006.01) C08F 2/22 (2006.01) C08F 255/02 (2006.01) C08F 255/08 (2006.01) C08F 285/00 (2006.01) C09D 151/00 (2006.01) C09D 151/06 (2006.01) C09D 151/08 (2006.01)
Patent
CA 2181934
The present invention is a process for hydrophobically modified emulsion polymers, polymers obtained thereby, waterborne coating compositions containing the polymers and a coated substrate coated with the coating composition. The emulsion polymer is formed by first combining hydrophobic polymeric compound and .alpha.,.beta.-ethylenically unsaturated monomer, and surfactant to form a mixture and subjecting the mixture to high stress techniques to form stabilized particles of the hydrophobic polymer and monomers, in the aqueous phase, said particles having a particle size between 50 and 500 nm. The polymerizable material within the particles is polymerized to form a hydrophobically modified core polymer. Additional monomers including at least one .alpha...beta.- ethylenically unsaturated hydrophilic monomer are then added to the core polymer and polymerized by emulsion polymerization, to form a hydrophobically modified core-shell emulsion polymer. To form a coating composition, the emulsion polymer is combined with additional components such as pigments, crosslinkers, plasticizers and solvents. The coating is applied to a substrate to form a coated article.
Basf Corporation
Grandhee Sunitha
Robic
LandOfFree
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