Polyester organo-iron compositions
Compositions of polyester with organo iron compounds are disclosed. These blends have utility in that the organo-iron compound makes the polyester in the composition an oxygen scavenger.
1 . A thermoplastic composition comprising a polyester and an organo-iron compound wherein the iron is selected from the group consisting of iron (II) or iron (III) and the organo-iron compound is present at a level greater than 10 ppm of the polymer components in the composition.
2 . An article comprising the composition of claim 1 wherein the article is a fiber, sheet, film, preform, or layer of the wall of a container.
3 . The composition of claim 1 where the polyester is a crystallizable polyethylene terephthalate.
4 . An article comprising the composition of claim 3 wherein the article is a fiber, sheet, film, preform, or layer of the wall of a container.
5 . The composition of claim 2 where the organo-iron compound is selected from the group consisting of iron (II) acetylacetonate and iron (III) acetylacetonate.
6 . An article comprising the composition of claim 5 wherein the article is a fiber, sheet, film, preform, or layer of the wall of a container.
7 . The composition of claim 3 which further comprises a polyamide where the polyamide is the reaction product of amino caproic acid with itself or A-D where A is a residue of dicarboxylic acid comprising adipic acid, isophthalic acid, terephthalic acid, 1,4-cyclohexanedicarboxylic acid, rescorcinol dicarboxylic acid, or naphthalenedicarboxylic acid, or a mixture thereof and D, where D is a residue of a diamine comprising m-xylylene diamine, p-xylylene diamine, hexamethylene diamine, ethylene diamine, or 1,4 cyclohexanedimethylamine, or a mixture thereof.
8 . An article comprising the composition of claim 7 wherein the article is a fiber, sheet, film, preform, or layer of the wall of a container.
9 . The composition of claim 7 wherein the organo-iron compound is selected from the group consisting of iron (II) acetylacetonate and iron (III) acetylacetonate.
10 . An article comprising the composition of claim 9 wherein the article is a fiber, sheet, film, preform, or layer of the wall of a container.
11 . The composition of claim 7 wherein the polyamide is MXD6 nylon.
12 . An article comprising the composition of claim 11 wherein the article is a fiber, sheet, film, preform, or layer of the wall of a container.
13 . The composition of claim 11 wherein the organo-iron compound is selected from the group consisting of iron (II) acetylacetonate and iron (III) acetylacetonate.
14 . An article comprising the composition of claim 12 wherein the article is a fiber, sheet, film, preform, or layer of the wall of a container.