Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Reexamination Certificate
2007-03-13
2007-03-13
Ahmed, Sheeba (Department: 1773)
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
C427S532000, C427S541000, C427S331000, C427S372200, C427S384000, C427S388400, C427S391000, C427S395000, C524S458000
Reexamination Certificate
active
10378996
ABSTRACT:
This invention is directed to aqueous-based ethylene-vinyl acetate (EVA) polymer emulsions suited for use in heat seal applications. The EVA polymers of this invention are produced by a relatively low-pressure process, i.e., less than 2000 psig, preferably from about 1000 to about 2000 psig. The aqueous-based EVA based polymer emulsions contain crystalline segments resulting from ethylene linkages and are prepared by emulsion polymerizing ethylene and vinyl acetate, preferably with a carboxylic monomer, in the presence of a stabilizing system containing surfactant or a cellulosic protective colloid in combination with surfactant.
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Bott Richard Henry
Daniels Christian Leonard
Horwat David William
Rabasco John Joseph
Vratsanos Menas Spyros
Ahmed Sheeba
Air Products Polymers, L.P.
Bongiorno Mary E.
Brewer Russell L.
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