Use of vinylamine homopolymers and copolymers in film lamination
AssigneeAir Products and Chemicals, Inc.
InventorsLori A. Vratsanos, Jeffrey A. Kuphal, Walter L. Renz
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Abstract
A composite structure which comprises, in intimate jointed lamination, a substrate layer, and intermediate adhesion layer, and a tightly adhered polymeric film, the adhesion layer comprising an aqueous emulsion polymer containing a vinylamine homopolymer or copolymer, preferably polyvinyl alcohol/polyvinylamine copolymer.
Claims21
In a composite structure which comprises, in intimate joined lamination, a substrate layer, an intermediate adhesive layer comprising an aqueous adhesive emulsion polymer and an adhered film, the improvement which comprises the aqueous adhesive emulsion polymer containing an adhesion promoter comprising 0.1 to 10 wt % vinylamine polymer, based on emulsion polymer, the vinylamine polymer being in the amine salt or free amine form.
In a composite structure which comprises, in intimate joined lamination, a substrate layer, an intermediate adhesive layer comprising an aqueous adhesive emulsion polymer and an adhered polymer film, the improvement which comprises the aqueous adhesive emulsion polymer consisting essentially of an aqueous vinyl acetate/ethylene emulsion copolymer containing an adhesion promoter comprising 0.1 to 10 wt % vinylamine polymer, based on emulsion copolymer, the vinylamine polymer having a formula selected from the group consisting of ##STR6## where x=0-75 mole %,
- y=25-100 mole %, and
- Mw=10,000 to 500,000,
- and ##STR7## where m=0-15 mole %,
- n=50-99 mole %,
- x=0-30 mole %,
- y=0.5-30 mole %, and
- Mw=10,000 to 200,000,
- the vinylamine polymer being in the amine salt or free amine form.
In a composite structure which comprises, in intimate joined lamination, a substrate layer, an intermediate adhesive layer comprising an aqueous adhesive emulsion polymer and an adhered polymer film, the improvement which comprises the aqueous adhesive emulsion polymer consisting essentially of an aqueous vinyl acetate/ethylene emulsion copolymer containing an adhesion promoter comprising 0.5 to 5 wt % vinylamine polymer, based on emulsion copolymer, the vinylamine polymer having a formula selected from the group consisting of ##STR10## where x.ltoreq.5 mole %,
- y.gtoreq.95 mole %, and
- Mw=15,000 to 250,000,
- and ##STR11## where m=0-2 mole %,
- n=70-95 mole %,
- x=0.5-10 mole %,
- y=0.5-20 mole %, and
- Mw=10,000 to 200,000,
- the vinylamine polymer being in the amine salt or free amine form.
Dependencies are inferred from the claim text.