Dow Global Technolgoies LLC

Rohm and Haas Company

Hany Necola

Joseph B Binder

Saswati Pujari

Pressure sensitive adhesive compositions are disclosed comprising acrylic emulsions that are emulsion polymerization products of (a) a monomer mixture comprising, based on the total weight of monomers in the monomer mixture, from 50 to 99 weight percent 2-ethylhexyl acrylate and from 1 to 50 weight percent an unsaturated monomer, (b) a surfactant, and (c) an initiator. Methods for preparing pressure sensitive adhesive compositions are also disclosed. Food contact articles comprising the disclosed pressure sensitive adhesive compositions are also disclosed. In some embodiments, the disclosed food contact articles have an overall migration of less than 25 mg/dm, as measured in accordance with EN 1186, or less than 10 mg/dm, as measured in accordance with EN 1186.

Pressure sensitive adhesive compositions and methods of making same

Adhesive compositions are disclosed comprising acrylic copolymers formed from a monomer mixture comprising, based on the total weight of monomers in the monomer mixture, from 59 to 97.9 weight percent 2-ethylhexyl acrylate, from 0.1 to 10 weight percent styrene, from 0 to 25 weight percent methyl methacrylate, and from 2 to 30 weight percent ethyl acrylate, wherein the ratio of ethyl acrylate to styrene (by weight) is greater than 4.5 to 1. Methods for preparing adhesive compositions are disclosed comprising feeding an aqueous initial charge to a reactor, heating the aqueous initial charge to from about 30 to 110&#xb0; C., gradually feeding a monomer mixture into the reactor over a period of time (less than 3 hours), in the presence of a free-radical polymerization initiator, thereby forming the acrylic adhesive composition, wherein the amount of free monomer in the reactor does not exceed 17 percent by weight, based on the total weight of the reactor contents, during gradual feeding.

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Valbonne, France

Hany Necola