A polypropylene base resin composition for foam-molding which use's a propylene.cndot..alpha.,.omega.-diene base copolymer containing a small amount of .alpha.,.omega.-diene and obtained by copolymerizing propylene with a specific amount of .alpha.,.omega.-diene in the presence of a catalyst system for polymerizing olefin comprising a metallocene supported catalyst or a pre-activated metallocene supported catalyst and an organic aluminum compound and which provides a foamed article having uniform and fine foamed cells (bubbles) and a high foaming magnification, a foamable polypropylene base resin composition comprising the propylene.cndot..alpha.,.omega.-diene base copolymer and a specific amount of a foaming agent, a foamed article obtained by foam-molding the above composition, a production process for the above foamed article and a foam-molded product prepared by heat-molding the above foamed article.

Uma composição da resina da base do polypropylene para o espuma-molde que usaram um propylene.cndot..alpha., copolymer baixo de.omega.-diene que contem um pouco do alpha..omega.-diene e obtido copolymerizing o propylene com uma quantidade específica do alpha..omega.-diene na presença de um sistema do catalizador para o olefin polimerizando que compreende metallocene um catalizador suportado um metallocene pre-ativado ou suportou o catalizador e um composto de alumínio orgânico e que fornece um artigo espumado que tem pilhas uniformes e muito bem espumadas (as bolhas) e uma ampliação espumando elevada, uma composição foamable da resina da base do polypropylene que compreendem o propylene.cndot..alpha., o copolymer baixo de.omega.-diene e uma quantidade específica de um agente espumando, um artigo espumado obteve pelo espuma-molde a composição acima, um processo de produção para o acima ylene base resin composition for foam-molding which use's a propylene.cndot..alpha..omega.-diene base copolymer containing a small amount of alpha..omega.-diene and obtained by copolymerizing propylene with a specific amount of alpha..omega.-diene in the presence of a catalyst system for polymerizing olefin comprising a metallocene supported catalyst or a pre-activated metallocene supported catalyst and an organic aluminum compound and which provides a foamed article having uniform and fine foamed cells (bubbles) and a high foaming magnification, a foamable polypropylene base resin composition comprising the propylene.cndot..alpha..omega.-diene base copolymer and a specific amount of a foaming agent, a foamed article obtained by foam-molding the above composition, a production process for the above foamed article and a foam-molded product prepared pelo calor-molde o artigo acima espumado.

 
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