Appeal No. 1999-1461
Application No. 08/812,916
crosslinked thermoplastic elastomer of polypropylene resin and
"-olefin copolymer rubber and (B) a polybutene-1 resin which
is added after the formation of the partially crosslinked
thermoplastic elastomer. Further details of this appealed
subject matter are set forth in representative independent
claim 1 which reads as follows:
1. An interior trim material for automotive use, obtained
by successive injection molding, comprising:
(I) a surface layer formed of a composition comprising a
mixture of:
(A) a partially crosslinked thermoplastic elastomer
comprising (a) 10 to 30 parts by weight of a polypropylene
resin and (b) 90 to 70 parts by weight of an "-olefin
copolymer rubber per 100 parts by weight of the total of (a)
and (b), and
(B) a polybutene-1 resin, said polybutene-1 resin
being added after the formation of the partially crosslinked
thermoplastic elastomer,
wherein the proportion of (A) the thermoplastic elastomer and
(B) the polybutene-1 resin are 95 to 65 parts by weight and 5
to 35 parts by weight, respectively, per 100 parts by weight
of the total of (A) and (B), and
(II) a base layer formed of a polypropylene resin or a
composition of a polypropylene resin and an inorganic filler.
The references set forth below are relied upon by the
examiner as evidence of obviousness:
Yonekura et al. (Yonekura) 4,650,830 Mar. 17,
1987
2
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