Aqueous dispersion for coating and coated articles
AssigneeAsahi-Dow Limited
InventorsTakeshi Ashida, Fumitaka Saito, Masateru Akamatsu
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Abstract
An aqueous dispersion of partially neutralized ethylene/.alpha.,.beta.-ethylenically unsaturated carboxylic acid copolymer having a specific composition distribution of the acidic units is found to have an excellent film-forming property and suitable for coating of various substrates. Articles coated with said aqueous dispersion are improved in various properties such as heat-sealability, oil resistance, water resistance, adhesiveness and so on.
Claims19
An aqueous dispersion for coating comprising a partially neutralized copolymer comprising from 99 to 75 mol % of ethylene and from 1 to 25 mol % of .alpha., .beta.-ethylenically unsaturated carboxylic acid of which at least 10% is neutralized with metallic and/or ammonium ions, wherein the improvement comprises using the partially neutralized copolymer of ethylene and .alpha.,.beta.-ethylenically unsaturated carboxylic acid having a composition distribution of the acidic units within the range from 0.50 to 0.95 in terms of the ratio of the reciprocal of the minus first-order moment of the distribution of the acidic units to the plus first-order moment of the distribution of the acidic units.
An article of manufacture prepared by coating a substrate with an aqueous dispersion comprising a partially neutralized copolymer comprising from 99 to 75 mol % of ethylene and from 1 to 25 mol % of .alpha.,.beta.-ethylenically unsaturated carboxylic acid of which at least 10% is neutralized with metallic and/or ammonium ions, wherein the improvement comprises using the partially neutralized copolymer of ethylene and .alpha.,.beta.-ethylenically unsaturated carboxylic acid having a composition distribution of the acidic units within the range from 0.50 to 0.95 in terms of the ratio of the reciprocal of the minus first-order moment of the distribution of the acidic units to the plus first-order moment of the distribution of the acidic units.
Dependencies are inferred from the claim text.