Polyester impact modifiers
AssigneeDanimer IPCo, LLC
InventorsArne Matthew Terwillegar, Karson Durie, Mangaldeep Kundu
Life of this patent
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Abstract
A polyester is disclosed which is made up of: (1) from about 15 to about 40 weight percent monomer repeat units of isosorbide; (2) from about 25 to about 60 weight percent monomer repeat units of a dicarboxylic acid or anhydride such as succinic acid or anhydride; and (3) from about 10 to about 20 weight percent monomer repeat units of a polyhydric alcohol such as 1,3-propanediol. In some instances, the polymer may also include monomer repeat units of methyl nadic anhydride or nadic anhydride. A polymer composition is also disclosed, which includes the polyester as well as a biodegradable polymer selected from the group consisting of poly(lactic acid), poly(hydroxyalkanoates), and mixtures thereof.
Claims30
A polyester comprising:
- from about 15 to about 40 weight percent monomer repeat units of isosorbide, based on the total weight of the polyester;
- from about 25 to about 60 weight percent monomer repeat units of a dicarboxylic acid or anhydride, based on the total weight of the polyester;
- and
- from about 10 to about 20 weight percent monomer repeat units of a polyhydric alcohol, based on the total weight of the polyester,
- wherein the polyester has a weight average molecular weight of at least 8000 Daltons, as determined by ASTM D5296-05 and
- wherein the dicarboxylic acid or anhydride comprises a mixture of (1) succinic acid or succinic anhydride and (2) nadic anhydride, methyl nadic anhydride, C36 dimer acid, or partially hydrogenated C36 dimer acid, and mixtures thereof.
A polymer composition comprising:
- from about 50 to about 95 weight percent of a biodegradable polymer selected from the group consisting of poly(lactic acid), poly(hydroxyalkanoates), and mixtures thereof;
- and
- from about 5 to about 50 weight percent of an impact modifying polyester, wherein the impact modifying polyester comprises
- from about 15 to about 40 weight percent monomer repeat units of isosorbide, based on the total weight of the polyester;
- from about 25 to about 60 weight percent monomer repeat units of a dicarboxylic acid or anhydride, based on the total weight of the polyester;
- and
- from about 10 to about 20 weight percent monomer repeat units of a polyhydric alcohol, based on the total weight of the polyester,
- wherein the polyester has a weight average molecular weight of at least 8000 Daltons, as determined by ASTM D5296-05 and
- wherein the dicarboxylic acid or anhydride comprises a mixture of (1) succinic acid or succinic anhydride and (2) nadic anhydride, methyl nadic anhydride, C36 dimer acid, or partially hydrogenated C36 dimer acid, and mixtures thereof.
Dependencies are inferred from the claim text.