POLYAMIDE-POLYDIENE BLENDS WITH IMPROVED OXYGEN REACTIVITY
This application discloses the use of polyamide-polydiene blends to improve the oxygen reactivity in the presence of ionic polyester compatibilizers.
1 . A composition comprising
a first polyester with a sulfonated comonomer having an —SO 3 M group with M being a metal in a +1 or +2 valence state selected from the group consisting of Li, Na, Zn, Sn, Ca and K,
a second polyester without a sulfonated comonomer having an —SO 3 M group,
a polyamide,
a polydiene compound, and
a transition metal compound
wherein the sulfonated comonomer having an —SO 3 M group is derived from the salt of sulfoisophthalic acid or its dimethyl ester and is copolymerized into the first polyester.
2 . The composition of claim 1 , wherein the weight ratio of the polyamide to the polydiene compound is in the range of 4:1 and 1000:1.
3 . The composition of claim 1 , wherein the polyamide is poly(m-xylylene adipamide).
4 . The composition of claim 2 , wherein the polyamide is poly(m-xylylene adipamide).
5 . The composition of claim 1 , wherein the metal of the transition metal compound is cobalt.
6 . The composition of claim 4 , wherein the metal of the transition metal compound is cobalt.
7 . The composition of claim 1 , wherein the polydiene compound is polybutadiene.
8 . The composition of claim 6 , wherein the polydiene compound is polybutadiene.
9 . The composition of claim 1 , wherein the second polyester is a crystallizable polyester with at least 85% of its acid units derived from terephthalic acid.
10 . The composition of claim 8 , wherein the second polyester is a crystallizable polyester with at least 85% of its acid units derived from terephthalic acid.
11 . A container made from the composition of claim 1 .
12 . A container made from the composition of claim 10 .
13 . The container of claim 11 , wherein the container comprises a stretched wall.
14 . The container of claim 12 , wherein the container comprises a stretched wall.