Polycondensation pre-polyesters, other copolyester precursors, and copolyesters made therefrom
AssigneeEastman Chemical Company
InventorsRobert Jacks Sharpe, Emmett Dudley Crawford
Life of this patent
Estimating the term…
Abstract
A pentamer comprising the following: R and R″ are residues of at least one diol selected from 2,2,4,4-tetramethylcyclobutane-1,3-diol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, hydroxypivalyl hydroxypivalate, isosorbide, 1,4-di-(hydroxyethoxy)-benzene, 2,2-bis-(4-hydroxycyclohexyl)-propane, 2,4-dihydroxy-1,1,3,3-tetramethyl-cyclobutane, 2,2-bis-(3-hydroxyethoxyphenyl)-propane, or 2,2-bis-(4-hydroxypropoxyphenyl)-propane; and R and R″ are not the same; and R′ comprises residues of at least one diacid or diester.
Claims15
A pentamer comprising at least one of the following structures:
- wherein R and R″ comprises residues of at least one diol, wherein said diol is selected from residues of 2,2,4,4-tetramethylcyclobutane-1,3-diol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol hydroxypivalyl hydroxypivalate, isosorbide, 1,4-di-(hydroxyethoxy)-benzene, 2,2-bis-(4-hydroxycyclohexyl)-propane, 2,4-dihydroxy-1,1,3,3-tetramethyl-cyclobutane, 2,2-bis-(3-hydroxyethoxyphenyl)-propane, or 2,2-bis-(4-hydroxypropoxyphenyl)-propane;
- wherein R and R″ are not the same;
- and
- wherein R′ comprises residues of at least one diacid or diester.
A diester intermediate comprising the following structure:
- wherein R comprises residues of at least one diol, wherein said diol is selected from residues of 2,2,4,4-tetramethylcyclobutane-1,3-diol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol hydroxypivalyl hydroxypivalate, isosorbide, 1,4-di-(hydroxyethoxy)-benzene, 2,2-bis-(4-hydroxycyclohexyl)-propane, 2,4-dihydroxy-1,1,3,3-tetramethyl-cyclobutane, 2,2-bis-(3-hydroxyethoxyphenyl)-propane, or 2,2-bis-(4-hydroxypropoxyphenyl)-propane;
- wherein R′ comprises residues of at least one diacid or diester;
- and
- wherein R′″ comprises at least one of methyl, ethyl, t-butyl, or benzyl, or mixtures thereof.
A diacid comprising the following structure:
- wherein R comprises at least one diol selected from residues of 2,2,4,4-tetramethylcyclobutane-1,3-diol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, hydroxypivalyl hydroxypivalate, isosorbide, 1,4-di-(hydroxyethoxy)-benzene, 2,2-bis-(4-hydroxycyclohexyl)-propane, 2,4-dihydroxy-1,1,3,3-tetramethyl-cyclobutane, 2,2-bis-(3-hydroxyethoxyphenyl)-propane, or 2,2-bis-(4-hydroxypropoxyphenyl)-propane.
Dependencies are inferred from the claim text.