Appeal No. 1997-3589
Application No. 08/117,013
11. A spinning finish composition for synthetic filament fibers containing a lubricant
component having improved biodegradability, said lubricant component consisting of a block
copolyester prepared from the blocks A) and B) wherein,
block A) consists of a hydrophilic polyethylene glycol having a weight average molecular weight
of 450 to 20,000,
block B) consists of a hydrophobic diol selected from the group consisting of polypropylene
glycols, polytetrahydrofurans, polycaprolactone diols, hydrogenation products of ricinoleic acid esters,
and dimeric diols, and wherein said block A) and said block B) are interconnected with aliphatic C2-36
dicarboxylic acids, anhydrides thereof, or esters thereof with lower C alcohols, or carbonic acid
1-8
diesters of lower C alcohols.
1-8
In addition to claiming spinning finish composition, appellants’ also claim a process of
lubricating a synthetic filament comprising contacting the filament with a lubricant component. See, e.g.,
claim 19.
The References
The prior art references of record relied upon by the examiner in rejecting the appealed claims
are:
Yanai et al. (Yanai) 4,725,500 Feb. 16, 1988
Fujita et al. (Fujita) 4,968,776 Nov. 6, 1990
The Rejections
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