Stock material or miscellaneous articles – Hollow or container type article – Paper containing
Patent
1988-01-19
1990-03-27
Ives, P. C.
Stock material or miscellaneous articles
Hollow or container type article
Paper containing
4284752, 428481, 428514, 428516, 428518, 383123, 426111, 426113, 426234, 524502, 524808, B65D 3322, B65D 8500, C08L 3300, B32B 2708
Patent
active
049119605
ABSTRACT:
Wet laminating adhesives capable of withstanding the stresses encountered during heat sealing operations are prepared from emulsion copolymers consisting essentially of 45 to 80% by weight of a vinyl ester of an alkanoic acid, 10 to 30% ethylene, 5 to 30% of dialkyl maleate, 0.5 to 2% of an N-methylol containing comonomer and 0.5 to 4% of an ethylenically unsaturated mono- or di-carboxylic acid. These specific emulsion copolymers are prepared utilizing standard emulsion polymerization procedures with hydroxyethylcellulose or polyvinyl alcohol as a protective colloid. The emulsion polymers thus produced provide superior wet laminating adhesive properties for use in substrates which are to be formed into microwavable packages or bags.
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Barnhart Terence M.
Mudge Paul R.
Walker James L.
Dec Ellen T.
Ives P. C.
National Starch and Chemical Corporation
Szala Edwin M.
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