Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1987-08-06
1988-05-17
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428290, D04H 158
Patent
active
047450258
ABSTRACT:
A copolymer emulsion for bonding nonwoven products comprising an aqueous medium having colloidally dispersed therein a copolymer consisting essentially of vinyl acetate, 5-35 wt % ethylene and 2 to 10 wt % of an amide functional crosslinking comonomer which is N-methylolacrylamide or a compound of the formula R--NH--(CH.sub.2).sub.n --CH(OR').sub.2 where R is (meth)acryloyl, R' is a C.sub.1 -C.sub.4 alkyl group and n is 3 or 4, the copolymer emulsion prepared in the presence of 0.1 to 1 wt % polyvinyl pyrrolidone, based on vinyl acetate in the copolymer. Such emulsion binder copolymers demonstrate improved solvent resistance.
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Air Products and Chemicals Inc.
Bell James J.
Leach Michael
Marsh William F.
Simmons James C.
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