Patent ID: 6583209
Filing Date: 2003-06-24
Classification: C08K,C08L

Abstract:
A thermoplastic resin composite having improved melt strength comprising:(a) 76 to 99 weight percent, based on the total composition, of a thermoplastic propylene copolymer base resin selected from the group consisting of random propylene-ethylene copolymer and two-phase compositions comprising a continuous phase of highly isotactic polypropylene homopolymer and a dispersed phase of rubber-like Ipropylene-ethylene copolymer; (b) 0.5 to 12 weight percent of an organically modified clay consisting of a smectite clay that has been ion-exchanged and intercalated with a quaternary ammonium compound of the formula: (R)n(CH3)mN+Clâˆ’where R represents a hydrogenated tallow moiety, n is 1 to 4, m is 0 to 3 with the proviso that n+m=4; and(c) 0.5 to 12 weight percent of a propylene copolymer compatibilizing agent having a melt flow rate from 40 to 400 g/10 min. and obtained by grafting 0.2 to 2.5 weight percent maleic anhydride and 97.5 to 99.8 weight percent propylene-ethylene copolymer, the weight ratio of (b):(c) ranging from 1:5 to 1:0.1.