High melt strength composition comprising modified polycaprolactam and impact modifier
AssigneeAllied Corporation
InventorGhazi M. A. Khattab
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Abstract
Compositions are described, which are blow-moldable into shaped articles, comprising a reaction product between polycaprolactam, aminoalkyltrialkoxysilane and a catalytic amount of water. The compositions have a melt index of about 2.25 g/10 min. or below and are substantially free of trialkoxysilane groups. Preferred compositions also contain ethylene/vinyl acetate copolymer as an impact modifier to increase the impact strength of blow-molded articles made therefrom, such as bottles.
Claims12
A composition possessing sufficient melt strength for the blow-molding of shaped articles comprising the reaction product between polycaprolactam, having a melt index of at least 3 grams/10 minutes, aminoalkyltrialkoxysilane, and a catalytic amount of water, said reaction product being substantially free of trialkoxysilane groups, and said composition further comprising 1 to 50 percent by weight of the composition of an impact modifier, said composition possessing a melt index below about 2.25 g/10 min.
A composition possessing sufficient melt strength for the blow-molding of shaped articles comprising the reaction product between polycaprolactam, having a melt index of at least 3 grams/10 minutes, ethylene/vinyl acetate copolymer, gamma-aminopropyltrialkoxysilane and a catalytic amount of water, said reaction product being substantially free of trialkoxysilane groups, said composition possessing a melt index of below about 2.25 g/10 min. and said ethylene/vinyl acetate copolymer being present in about 5-20 weight percent of the composition and said aminosilane compound being present in about 0.01 to 1.0 weight percent of said composition.
Dependencies are inferred from the claim text.