PURPOSE:To provide the titled compsn. having excellent adhesion and resistance to low-temperature impact and heat cycles, consisting of a specified copolyester and a modified olefin polymer. CONSTITUTION:15-45% (by mol; the same applies hereinbelow), 35-5% arom. and/or alicyclic dicarboxylic acid other than terephthalic acid and 0-25% 6-40C aliph. dicarboxylic acid are reacted with 15-50% 1,4-butanediol and 35-0% at least one diol selected from the group consisting of ethylene glycol, 1,6-hexanediol and neopentyl glycol to obtain a copolyester (A) having a relative viscosity of 1.1-2.0 (in 0-chlorophenol soln. of 0.5wt% carboxylic acid (derivative) is grafted onto a hydrogenated copolymer having an MI of 0.5-200g/10min, composed of a conjugated diene or a mixture of said conjugated diene with an arom. vinyl hydrocarbon, to obtain a modified olefin polymer (B). 100pts.wt. component A is blended with 0.5-30pts.wt. component B and 0.01-3pts.wt. nucleating agent (C) having a particle size of not larger than 5mu.
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