Patent ID: 7144939

Claim:
An organic nucleating agent which induces b-axis orientation within a test homopolymer polypropylene formulation to a degree in which a relative angle (ND) of greater than 13.5 is detected, wherein the unnucleated test homopolymer polypropylene formulation exhibits a density of about 0.9 g/cc, a melt flow of about 12 g/10 min, a Rockwell Hardness (R scale) of about 90, a tensile strength of about 4,931 psi, an elongation at yield of about 10%, a flexural modulus of about 203 kpi, an Izod impact strength of about 0.67 ft-lb/in, and a deflection temperature at 0.46 mPa of about 93°, and wherein said formulation comprising said combination is extruded then molded into plaques having dimensions of about 51 mm×76 mm×3.00 mm, wherein the total amount of said organic nucleating agent present within said test homopolymer is at most 0.25% by weight, and wherein said nucleating agent is a compound conforming to Formula (I) wherein M 1 and M 2 are the same or different, or M 1 and M 2 are combined to form a single moiety, and are selected from at least one Group I or Group II metal cation, and wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , and R 10 are either the same or different and are individually selected from the group consisting of hydrogen, C 1 –C 9 alkyl, hydroxy, C 1 –C 9 alkoxy, C 1 –C 9 alkyleneoxy, amine, and C 1 –C 9 alkylamine, halogens, and phenyl.