Polymer latexes with core-shell morphology
AssigneeEastman Kodak Company
InventorsTienteh Chen, Edward Schofield, Hwei-Ling Yau, Glenn M. Brown
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Abstract
The present invention is a polymer latex that includes polymer particles having a core portion and a shell portion. The core portion contains polymerized hydrophobic ethylenically unsaturated monomers with a water solubility less than 1% at room temperature. The shell portion contains polymerized monomers defined by formula (I) wherein X is O or NH, or NCH3, R1 and R2 are H, CH3, C2H5, C3H7, or C4H9, R3 and R4 are H or CH3, n1 and n2 are integers, n1 is from 1 to 4, n2 is from 1 to 20. The polymer particles having a size of less than 50 nm.
Claims8
A core-shell polymer latex in a gelatin-based photographic system comprising:
- a gelatin-based silver halide photographic dispersion and polymer particles comprising a core portion and a hydrophilic nonomer forming polymerized shell portion, the core portion comprising polymerized hydrophobic ethylenically unsaturated monomers with water solubility less than 1% at room temperature, the shell portion comprising polymerized monomers defined by formula (I)
- wherein X is O or NH, or NCH3,
- R1 and R2 are H, CH3, C2H5, C3H7, or C4H9,
- R3 and R4 are H or CH3,
- n1 and n2 are integers, n1 is from 1 to 4, n2 is from 1 to 20;
- and wherein particles of said polymer latex is less than 50 μ.
Dependencies are inferred from the claim text.