C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/6488
C08L 51/04 (2006.01) C08F 263/02 (2006.01) C08F 265/04 (2006.01) D21H 19/58 (2006.01)
Patent
CA 1153484
ABSTRACT Aqueous copolymer latexes comprising col- loidally dispersed, substantially spheroidal copolymer particles having a predominantly hydrophobic core portion and having a relatively hydrophilic polymeric portion which is preferentially oriented toward the outer surface as a shell portion are prepared by (a) emulsion polymerizing an initial monomer charge to form a first aqueous latex of a substantially linear, relatively hydrophilic polymer and (b) thereafter emulsion polymerizing a major proportion from about 50 to 95 parts by weight of a second and relatively more hydrophobic monomer charge in the presence of a minor proportion from about 5 to 50 parts by weight on a polymer solids basis of said first, relatively hydrophilic polymer latex. C-27,803
367433
Ishikawa Tadayoshi
Lee Do I.
Smart & Biggar
The Dow Chemical Company
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