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The invention provides a biodegradable polymer composition comprising a biodegradable polymer and a phenol-containing compound mixed with the polymer. The phenol-containing compound is present in the biodegradable polymer at an amount sufficient to slow the degradation rate of the biodegradable poly

The invention provides a biodegradable polymer composition comprising a biodegradable polymer and a phenol-containing compound mixed with the polymer. The phenol-containing compound is present in the biodegradable polymer at an amount sufficient to slow the degradation rate of the biodegradable polymer. The invention also pertains to a method for slowing the degradation rate of a biodegradable polymer.

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1. A method for preparing an article from a biodegradable polymer composition wherein the method comprises:a. introducing a phenol-containing compound comprising terpene-phenol resin into a composition comprising a biodegradable polymer having a degradation rate, wherein the phenol-containing compou

1. A method for preparing an article from a biodegradable polymer composition wherein the method comprises:a. introducing a phenol-containing compound comprising terpene-phenol resin into a composition comprising a biodegradable polymer having a degradation rate, wherein the phenol-containing compound is added in an amount sufficient to slow the degradation rate of the biodegradable polymer; andb. mixing the phenol-containing compound with the biodegradable polymer thereby providing a biodegradable polymer composition;wherein the biodegradable polymer consists essentially of:an aliphatic-aromatic copolyester having repeat units of the following wherein(i) R 11 and R 12 are the same or different, and are residues of one or more of diethylene glycol, propylene glycol, 1,3-propanediol, 2,2dimethyl-1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2,4-trimethyl-1,6-hexanediol, thiodiethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, triethylene glycol, or tetraethylene glycol;(ii) R 11 and R 12 are 100% of the diol components in the copolyester;(iii) R 13 is absent or is selected from one or more of the groups consisting of C 1 -C 12 alkylene or oxyalkylene; C 1 -C 12 alkylene or oxyalkylene substituted with one to four substituents independently selected from the group consisting of halo, C 6 -C 10 aryl, and C 1 -C 4 alkoxy; C 5 -C 10 cycloalkylene; and C 5 -C 10 cycloalkylene substituted with one to four substituents independently selected from the group consisting of halo, C 6 -C 10 aryl, and C 1 -C 4 alkoxy; and(iv) R 14 is selected from one or more of the groups consisting of C 6 -C 10 aryl, and C 6 -C 10 aryl substituted with one to four substituents independently selected from the group consisting of halo, C 1 -C 4 alkyl, and C 1 -C 4 alkoxy; andc. forming the biodegradable polymer composition into an article, wherein the article comprises: a film, a bottle, a blow molded article, an injection molded article or a container, and wherein the article exhibits a delayed biodegradation rate over an article formed from a biodegradable polymer composition not including the phenol-containing compound. 2. The method of claim 1 wherein the terpene-phenol resin comprises from about 1 to about 40% by weight of phenol as measured by weight of the compound. 3. The method of claim 1 wherein the terpene-phenol resin comprises from about 5 to about 20% by weight of phenol as measured by weight of the compound. 4. The method of claim 1 wherein the phenol-containing compound is present in the biodegradable polymer composition at from about 0.5 to about 10 weight % as measured by the total weight of the biodegradable polymer composition. 5. The method of claim 1 wherein the phenol-containing compound is present in the biodegradable polymer composition at from about 1 to about 3 weight % as measured by the total weight of the biodegradable polymer composition. 6. The method of claim 1 wherein R 11 and R 12 are the same or different, and are selected from the group consisting of residues of one or more of diethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol, and 1,4-butanediol, R 13 is selected from the group consisting of malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, 2,2-dimethyl glutaric acid, diglycolic acid, and an ester forming derivative thereof, and R 14 is selected from the group consisting of one or more of 1,4-terephthalic acid, 1,3-terephthalic acid, 2,6naphthoic acid, 1,5-napthoic acid, and an ester forming derivative thereof. 7. The method of claim 1, wherein the biodegradable polymer composition further comprises one or more of: a pigment, a dye, an opacifying agent, an antioxidant, an ultraviolet stabilizer, an optical brightener, an aliphatic acid, a metal salt, an antistatic agent, an antiblocking aid, a filler, a dispersing agent, a coating aid, a slip agent, a lubricant, starch, wood, and flour. 8. A biodegradable polymer composition for making an article comprising a film, a bottle, a blow molded article, an injection molded article or a container, wherein the biodegradable polymer composition comprises:a. a biodegradable polymer consisting essentially of:an aliphatic-aromatic copolyester having repeat units of the following structures: wherein(i) R 11 and R 12 are the same or different, and are residues of one or more of diethylene glycol, propylene glycol, 1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2,4-trimethyl-1,6-hexanediol, thiodiethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, triethylene glycol, or tetraethylene glycol;(ii) R 11 and R 12 are 100% of the diol components in the copolyester;(iii) R 13 is absent or is selected from one or more of the groups consisting of C 1 -C 12 alkylene or oxyalkylene; C 1 -C 12 alkylene or oxyalkylene substituted with one to four substituents independently selected from the group consisting of halo, C 6 -C 10 aryl, and C 1 -C 4 alkoxy; C 5 -C 10 cycloalkylene; and C 5 -C 10 cycloalkylene substituted with one to four substituents independently selected from the group consisting of halo, C 6 -C 10 aryl, and C 1 -C 4 alkoxy; and(iv) R 14 is selected from one or more of the groups consisting of C 6 -C 10 aryl, and C 6 -C 10 aryl substituted with one to four substituents independently selected from the group consisting of halo, C 1 -C 4 alkyl, and C 1 -C 4 alkoxy; andb. a phenol-containing compound comprising terpene-phenol resin, wherein the phenol-containing compound is present in the biodegradable polymer composition at an amount sufficient to slow the degradation rate of the biodegradable polymer, and wherein the article exhibits a delayed biodegradation rate over an article formed from a biodegradable polymer composition not including the phenol-containing compound. 9. The biodegradable polymer composition of claim 8 wherein R 11 and R 12 are the same or different, and are selected from the group consisting of residues of one or more of diethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol, and 1,4-butanediol, R 13 is selected from the group consisting of malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, 2,2-dimethyl glutaric acid, diglycolic acid, and an ester forming derivative. thereof, and R 14 is selected from the group consisting of one or more of 1,4-terephthalic acid, 1,3-terephthalic acid, 2,6-naphthoic acid, 1,5-naphthoic acid, and an ester forming derivative thereof. 10. The biodegradable polymer composition of claim 8 wherein the phenol-containing compound comprises from about 1 to about 40% by weight of phenol as measured by weight of the compound. 11. The biodegradable polymer composition of claim 8 wherein the phenol-containing compound is present in the biodegradable polymer composition in amount of from about 0.5 to about 10 weight % as measured by weight of the biodegradable polymer composition. 12. The biodegradable polymer composition of claim 8 wherein the phenol-containing compound is present in the biodegradable polymer composition in an amount of from about 1 to about 3 weight % as measured by weight of the biodegradable polymer composition. 13. The biodegradable polymer composition of claim 8, wherein the biodegradable polymer composition further comprises one or more of: a pigment, a dye, an opacifying agent, an antioxidant, an ultraviolet stabilizer, an optical brightener, an aliphatic acid, a metal salt, an antistatic agent, an antiblocking aid, a filler, a dispersing agent, a coating aid, a slip agent, a lubricant, starch, wood, and flour.