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...
Patent
1997-07-09
1999-02-16
Lipman, Bernard
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
058721819
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.
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Daniels Christian Leonard
Goddard Richard Joseph
Lorenz Randolph J.
Air Products and Chemicals Inc.
Bongiorno Mary E.
Brewer Russell L.
Lipman Bernard
Sarofin N.
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