DETAILED DESCRIPTION OF THE INVENTION The unsaturated copolymer resin which is used in the present invention is a resinous copolymer comprising at least one .
alpha.
-olefin having 2 to 12 carbon atoms and at least one 1,4-dienes represented by formula (I) ##STR3## wherein R.
sup.
1 represents an alkyl group having 1 to 8 carbon atoms, and R.
sup.
2 and R.
sup.
3 each represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
Exampes of the .
alpha.
-olefin having 2 to 12 carbon atoms include ethylene, propylene, butene-1, pentene-1, hexene-1, octene-1, 3-methylbutene-1, 3-methylpentene-1, 4-methylpentene-1, 3,3-dimethylbutene-1, 4,4-dimethylpentene-1, 3methylhexene-1, 4-methylhexene-1, 4,4-dimethylhexene-1, 5-methylhexene-1, allylcyclopentane, allylcyclohexane, styrene, allylbenzene, 3-cyclohexylbutene-1, vinylcyclopropane, vinylcyclopentane, vinylcyclohexane, and 2-vinylbicyclo(2,2,1)-heptane.
Of these compounds, ethylene, propylene, butene-1, 3-methylbutene-1, 4-methylpentene-1, and styrene are preferred.
Particularly preferred are ethylene, propylene, and 4-methylpentene-1.
These .
alpha.
-olefins can be used as mixtures comprising two or more thereof.
Examples of the 1,4-dienes represented by formula (I) include 1,4-hexadiene, 1,4-heptadiene, 4-methyl-1,4-hexadiene, 5-methyl-1,4-hexadiene, 4-ethyl-1,4-hexadiene, 4,5-dimethyl-1,4-hexadiene, 4-methyl-1,4-heptadiene, 4-ethyl-1, 4-heptadiene, 5-methyl-1,4-heptadiene, 4-ethyl-1,4-octadiene, 5-methyl-1,4-octadiene, and 4-n-propyl-1,4-decadiene.
Of these monomers, 1,4-hexadiene, 4-methyl-1,4-hexadiene, and 5-methyl-1,4-hexadiene are preferred.
Particularly preferred are 4-methyl-1,4-hexadiene and 5-methyl-1,4-hexadiene.
These 1,4-dienes can be used as mixtures comprising two or more thereof.
A preferred combination thereof is a mixture of 4-methyl-1,4-hexadiene and 5-methyl-1,4hexadiene (95:5 to 5:95 by weight).
The unsaturated copolymer resin of the present invention is prepared by copolymerizing the above .
alpha.
-olefin and 1,4-dienes in the presence of a Ziegler Natta catalyst for polymerization of
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Adhesives and Rubbers 
