Appeal No. 1996-2112
Application 08/210,217
1. A bituminous cold-application self-adhesive composition characterized in
comprising a mixture of:
5 to 25% of a styrene-diene rubbery polymer mixture that comprises
(A) one radial styrene-butadiene block copolymer;
(B) at least one styrene-isoprene block copolymer selected from the group
consisting of linear and radial copolymers; and
(C) one styrene-diene di-block copolymer;
0 to 25% of at least one tackifying resin; and,
5 to 95% bitumen.
6. The composition of claim 1 characterized in that copolymer (C) comprises a
styrene di-block copolymer in which the styrene portion represents from 15 to 45 weight
percent and whose total molecular weight is between 50,000 and 150,000.
7. The composition of claim 6 characterized in that copolymer (C) is of statistical
interlinking, containing one styrene block and one styrene-butadiene block in a statistical
distribution.
The references relied upon by the examiner are:
Barlow 4,464,427 Aug. 7, 1984
Algrim et al. (Algrim) 4,824,880 Apr. 25, 1989
Mitchell 5,182,319 Jan. 26, 1993
(filed Sep. 27, 1991)
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