Adhesive for difficult to bond surfaces

Details Adhesive for difficult to bond surfaces Adhesive for difficult to bond surfaces

1998-11-19

2000-05-16

Zitomer, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524564, 524755, 524819, 524823, 526331, C08L 3102

Patent

active

060638583

ABSTRACT:
Improved aqueous emulsion vinyl acetate-ethylene (VAE) polymer adhesives for use in packaging applications and on difficult to bond surfaces such as polyethylene, poly(ethylene terephthalate), and oriented polypropylene. The VAE polymers contain about 55-80 wt % vinyl acetate, 15-45 wt % ethylene, and 0-30 wt % of one or more additional ethylenically unsaturated copolymerizable monomer, based on the total weight of monomers. Cast films of the VAE emulsion polymers of this invention should have a tensile storage modulus (test frequency of 6.28 rad/sec) within the area encompassed by the following data points: 1.times.10.sup.5 and 2.times.10.sup.7 dynes/cm.sup.2 at 23.degree. C., and 1.times.10.sup.3 and 2.times.10.sup.6 dynes/cm.sup.2 at 70.degree. C.; preferably within the area encompassed by the following data points: 1.times.10.sup.6 and 1.5.times.10.sup.7 dynes/cm.sup.2 at 23.degree. C., and 3.times.10.sup.4 and 9.times.10.sup.5 dynes/cm.sup.2 at 70.degree. C.

REFERENCES:
patent: 3708388 (1973-01-01), Lindemann
patent: 4128518 (1978-12-01), Oyamada et al.
patent: 4892917 (1990-01-01), Mudge

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