Bis(aryloxyalkyl) esters of aromatic polycarboxylic acids and method of preparation
The invention provides a compound of the formula: wherein Ar is selected from the group consisting of aryl, monosubstituted aryl and polysubstituted aryl, heteroaryl, monosubstituted heteroaryl and polysubstituted heteroaryl; Ar′ is selected from the group consisting of aryl, monosubstituted aryl and polysubstituted aryl, heteroaryl, monosubstituted heteroaryl and polysubstituted heteroaryl; R is an alkylene radical having 2-20 carbon atoms; and n=1-20. The compounds of the invention are used with polymer resins to enhance their gas barrier properties.
1. In a container comprising a polyester composition, the improvement comprising inclusion of a gas barrier enhancing composition containing 99.4% of a diester compound of the formula:
and 0.6% of a monoester having the formula
wherein Ar is aryl; Ar′ is aryl; R is an alkylene radical having 2-20 carbon atoms; n=1-20 and wherein the gas barrier diester additive comprises 3-5 weight % of the total composition.
2. The container of claim 1 , wherein said diester has the formula
and said monoester has the formula
3. The container of claim 2 , wherein said diester has the formula
and said monoester has the formula
4. A shaped thermoplastic polyester container comprising a base polyester having physically incorporated therein an amount of one or more barrier-enhancing additives effective to reduce permeability of the shaped container to gases when compared to the shaped container not having the one or more barrier-enhancing additives incorporated therein, wherein the one or more barrier-enhancing additives are compositions containing 99.4% of a diester compound of the formula:
and 0.6% of a monoester having the formula
wherein Ar is aryl; Ar′ is aryl; R is an alkylene radical having 2-20 carbon atoms; n=1-20 and wherein the gas barrier diester additive comprises 3-5 weight % of the total composition.
5. A shaped thermoplastic polymeric container comprising a base polymer having physically incorporated therein an amount of one or more barrier-enhancing additives effective to reduce permeability of the shaped container to gases when compared to the shaped container not having the one or more barrier-enhancing additives incorporated therein, wherein the one or more barrier-enhancing additives are selected from the group consisting of the following compositions:
(a) a composition having 99.4% of a diester compound of the formula:
and 0.6% of a monoester having the formula
(b) a composition having 99.4% of a diester compound of the formula:
and 0.6% of a monoester having the formula
and
(c) a composition having 99.4% of a diester compound of the formula:
and 0.6% of a monoester having the formula
wherein the one or more barrier-enhancing additives comprises 3-5 weight % of the total composition.