Appeal No. 2000-1031
Application No. 08/591,330
metallocene polyethylene; and c) optionally a particular amount
of a hydrocarbon elastomer. The specification states (page 4,
lines 18-20):
The invention depends on the discovery that even
a small amount, - as little as 5 percent, and
generally no more than 35 percent – of acid-grafted
metallocene polyethylenes, when used in otherwise
conventional-linear polyethylene and/or LDPE based
adhesive compositions, can produce markedly superior
adhesives compared with similar adhesive compositions
but which contain comparable levels of acid-grafted
conventional-linear polyethylene and/or acid grafted
LDPE.
Further details of this appealed subject matter are recited
below in illustrative claim 1, which is the sole independent
claim on appeal and which is reproduced from the amendment filed
Dec. 8, 1997 (paper 8):
1. An adhesive composition, comprising:
a) a non-metallocene generated
polyethylene selected from the group
consisting of conventional-HDPE,
conventional-LLDPE, conventional-VLDPE,
LDPE, and a blend of any of these four,
b) from 5 to 35 weight percent, based on
the total weight of a) plus b) plus c),
of an acid-grafted metallocene
polyethylene of those having a melt
flow ratio I10/I2 of less than 6.53 and
an Mw/Mn ratio of greater than the melt
flow ratio less 4.63, and
c) optionally up to 30 weight percent of a
hydrocarbon elastomer, the acid grafted
agent being an unsaturated carboxylic
acid or its derivative, selected from
the group consisting of acrylic acid,
methacrylic acid, fumaric acid, maleic
acid, nadic acid, citraconic acid,
2
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