Modified polymer composition and stabilizer mixture for making the same

A modified polymer composition, comprising:

• an olefin-based polymer selected from the group consisting of polyolefin, ethylene-vinyl acetate copolymer, and a combination thereof;
• and
• a stabilizer mixture containing:
• at least one organic phosphorus-containing antioxidant represented by a formula selected from the group consisting of formulae (1), (2), (3), (4), (5), (6), (7), and (8):
• wherein R11,R12, and R13 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C1-C8 alkyl group,
• wherein R21, R22, R23, R24, and R25 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C1-C8 alkyl group,
• wherein R31, R32, R33, R34, and R35 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C1-C8 alkyl group,
• wherein
• R41, R42, R43, R44, and R45, R46, R47, and R48 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C1-C8 alkyl group, and
• Z41 and Z42 are independently selected from the group consisting of O, S, and a C1-C4 alkylene group,
• wherein
• R51, R52, R53, R54, R55, and R56 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C1-C8 alkyl group, and
• Z51 is selected from the group consisting of O, S, and a C1-C4 alkylene group,
• wherein
• R61, R62, R63, and R64 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C1-C8 alkyl group,
• T is selected from the group consisting of a C1-C18 hydrocarbon group and a group represented by
• where R65, R66, and R67 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C1-C8 alkyl group, and
• Z61 is selected from the group consisting of O, S, and a C1-C4 alkylene group,
• wherein R71, R72, R73, R74, R75, R76, R77, and R78 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C1-C8 alkyl group, and
• and
• at least one sulfur-containing carboxylate salt represented by a formula selected from the group consisting of formulae (9), (10), (11), and (12):
• wherein
• R91 is selected from the group consisting of hydrogen and a C1-C18 alkyl group,
• R92 is selected from the group consisting of a C1-C30 alkyl group and a C6-C18 aryl group,
• Mq+ is selected from the group consisting of Ca2+, Ba2+, Mg2+, Zn2+, and Al3+,
• q is an integer of 2 or 3, and
• t is an integer ranging from 0 to 6,
• wherein
• X11 and X12 are independently selected from the group consisting of Ca2+, Ba2+, Mg2+, and Zn2+,
• Y11 and Y12 are independently selected from the group consisting of a C1-C30 alkyl group and a C6-C18 aryl group, and
• a and b are independently an integer ranging from 1 to 6,
• wherein
• X21 is selected from the group consisting of Ca2+, Ba2+, Mg2+, and Zn2+,
• G1 and G2 independently represent
• where c and d are independently an integer ranging from 1 to 6, and
• p is an integer ranging from 1 to 9 on the proviso that a plurality of G1 are the same or different and a plurality of X21 are the same or different when p is an integer equal to or larger than 2,
• and
• wherein
• X31 is selected from the group consisting of Ca2+, Ba2+, Mg2+, and Zn2+, and
• Y31 is selected from the group consisting of a C1-C30 alkyl group, a C6-C18 aryl group, and a group represented by R93OOC—(CH2)k— where R93 is selected from the group consisting of a C1-C30 alkyl group and a C6-C18 aryl group, and k is an integer ranging from 1 to 5.