Methods and compositions for biorenewable polyesters derived from camphoric acid
View Patent ↗In one aspect, the disclosure relates to biorenewable polyesters and polyester copolymers derived from camphoric acid, methods of making same, and articles comprising same. The disclosed biorenewable polyesters can have a Mn of from about 5,000 Da to about 500,000 Da. Also disclosed herein is the preparation of various monomers useful in the reactions disclosed herein, e.g., cis-1,4-anhydroerythritol and bis(2-hydroxyethyl) camphorate. In various aspects, the disclosed biorenewable polyesters and polyester copolymers can be used to the production of various articles utilizing a conventional polyester or polyester copolymer, that is, to replace, in part or in whole, a conventional nonbiorenewable polyester or polyester copolymer. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
1. A polyester copolymer having a structure represented by a formula:
wherein R 1 is an erythritan group or an isosorbide group;
wherein each occurrence of R 2 is independently selected from hydrogen, C1-C12 alkanediyl, and C3-C12 cycloalkanediyl;
wherein R 3 is arylene, wherein the arylene has 6 to 14 carbon atoms; and
wherein x and y are not zero, wherein the polyester copolymer has a molecular weight Mw from about 5,000 Da to about 500,000 Da; and
wherein the glass transition temperature of the polyester copolymer is at or above 100° C.
2. The polyester copolymer of claim 1 , wherein R 2 is hydrogen.