MODIFIED POLYMER COMPOSITION AND STABILIZER MIXTURE FOR MAKING THE SAME

1 . A stabilizer mixture for modifying an olefin-based polymer, the stabilizer mixture comprising:

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 R 11 , R 12 , and R 13 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C 1 -C 8 alkyl group,

wherein R 21 , R 22 , R 23 , R 24 , R 25 , and R 26 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C 1 -C 8 alkyl group,

wherein R 31 , R 32 , R 33 , R 34 , and R 35 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C 1 -C 8 alkyl group,

wherein

R 41 , R 42 , R 43 , R 44 , R 45 , R 46 , R 47 , and R 48 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C 1 -C 8 alkyl group, and

Z 41 and Z 42 are independently selected from the group consisting of O, S, and a C 1 -C 4 alkylene group,

wherein

R 51 , R 52 , R 53 , R 54 , R 55 , and R 56 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C 1 -C 8 alkyl group, and

Z 51 is selected from the group consisting of O, S, and a C 1 -C 4 alkylene group,

wherein

R 61 , R 62 , R 63 , and R 64 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C 1 -C 8 alkyl group, and

Z 61 is selected from the group consisting of O, S, and a C 1 -C 4 alkylene group,

wherein R 71 , R 72 , R 73 , R 74 , R 75 , R 76 , R 77 , and R 78 are independently selected from the group consisting of hydrogen, a tert-butyl group, an isopropylphenyl group, and a linear C 1 -C 8 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)

[R 92 —S—CHR 91 —(CH 2 ) t —COO − ] q M q+   (9),

wherein

R 91 is selected from the group consisting of hydrogen and a C 1 -C 18 alkyl group,

R 92 is selected from the group consisting of a C 1 -C 30 alkyl group, a C 6 -C 18 aryl group, and a group represented by R 93 OOC—(CH 2 ) k — where R 93 is selected from the group consisting of a C 1 -C 30 alkyl group and a C 6 -C 18 aryl group, and k is an integer ranging from 1 to 5,

M q+ is selected from the group consisting of Ca 2+ , Ba 2+ , Mg 2+ , Zn 2+ , and Al 3+ ,

q is an integer of 2 or 3, and

t is an integer ranging from 0 to 6,

wherein

X 11 and X 12 are independently selected from the group consisting of Ca 2+ , Ba 2+ , Mg 2+ , and Zn 2+ ,

Y 11 and Y 12 are independently selected from the group consisting of a C 1 -C 30 alkyl group and a C 6 -C 18 aryl group, and

a and b are independently an integer ranging from 1 to 6,

H-G 1 -X 21  p -G 2 -H  (11),

wherein

X 21 is selected from the group consisting of Ca 2+ , Ba 2+ , Mg 2+ , and Zn 2+ ,

G 1 and G 2 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 G 1 are the same or different and a plurality of X 21 are the same or different when p is an integer equal to or larger than 2,

and

wherein

X 31 is selected from the group consisting of Ca 2+ , Ba 2+ , Mg 2+ , and Zn 2+ , and

Y 31 is selected from the group consisting of a C 1 -C 30 alkyl group, a C 6 -C 18 aryl group, and a group represented by R 93 OOC—(CH 2 ) k — where R 93 is selected from the group consisting of a C 1 -C 30 alkyl group and a C 6 -C 18 aryl group, and k is an integer ranging from 1 to 5.

2 . The stabilizer mixture according to claim 1 , wherein R 91 represents hydrogen, and R 92 is selected from the group consisting of a C 1 -C 18 alkyl group, a C 6 -C 18 aryl group, and a group represented by R 93 OOC—(CH 2 ) k — where R 93 represents a C 1 -C 18 alkyl group and k is 1 or 2.

3 . The stabilizer mixture according to claim 2 , wherein R92 is selected from the group consisting of dodecyl and H 17 C 8 OOCCH 2 —.

4 . 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

the stabilizer mixture according to claim 1 .

5 . The modified polymer composition according to claim 4 , wherein said stabilizer mixture is present in an amount ranging from 0.01 to 2.2 parts by weight based on 100 parts by weight of said olefin-based polymer.

6 . The modified polymer composition according to claim 4 , wherein said polyolefin is selected from the group consisting of polyethylene, polypropylene, and a combination thereof.