Process for manufacture of acrylic core/shell polymers
AssigneeRohm and Haas Company
InventorsWilliam J. Ferry, Donald H. Jones, Roger K. Graham
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Abstract
A process for the isolation of acrylic core/shell polymers with a high percentage of a rubbery phase by spraydrying in the presence of inert particulate material such as fumed silica in the gaseous drying medium.
Claims8
A process for producing an acrylic core/shell polymer having 55 to 85 parts of an acrylic rubbery core comprising polymerizing 15 to 45 parts of a hard shell polymer onto a pre-formed rubbery core polymer under emulsion conditions and spray-drying the resultant latex in a spray dryer while blowing 0.01 to 1.5 parts inert particulate material into the gaseous drying media of the spray dryer.
Dependencies are inferred from the claim text.