Copolymer polyester resin and adhesive composition comprising same
AssigneeSK Chemicals Co., Ltd.
InventorsJong-Kwan Ko, Soon-Ki Kim, Hyung-Gon Kim
Life of this patent
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Abstract
A copolymer polyester resin and an adhesive composition containing the copolymer polyester resin are disclosed. The copolymer polyester resin has a low glass transition temperature and improved hydrolysis resistance and solution storage stability. Therefore, the adhesive composition containing the copolymer polyester resin is superb in terms of hydrolysis resistance, solution storage stability, water heat resistance, and adhesiveness.
Claims16
A copolymerized polyester resin, which comprises a repeat unit derived from two or more dicarboxylic acid components and a repeat unit derived from two or more diol components,
- wherein the two or more dicarboxylic acid components comprise a first dicarboxylic acid comprising terephthalic acid or a derivative thereof;
- and a second dicarboxylic acid comprising a C9 to C12 aliphatic dicarboxylic acid or a derivative thereof,
- wherein the two or more diol components comprise a first diol comprising 2-methyl-1,3-propanediol;
- and a second diol comprising 1,6-hexanediol,
- wherein the first diol is included in an amount of 40% by mole to 80% by mole based on 100% by mole of entire diol components, and
- wherein the second dicarboxylic acid and the second diol are included, in total, in a combined total amount of 30% by mole or less based on 100% by mole of a total of entire dicarboxylic acid components and the entire diol components.
A process for preparing a copolymerized polyester resin, which comprises (1) sequentially or simultaneously subjecting two or more dicarboxylic acid components and two or more diol components to an esterification reaction, and (2) polycondensing the reaction product,
- wherein the two or more dicarboxylic acid components comprise a first dicarboxylic acid comprising terephthalic acid or a derivative thereof;
- and a second dicarboxylic acid comprising a C9 to C12 aliphatic dicarboxylic acid or a derivative thereof,
- wherein the two or more diol components comprise a first diol comprising 2-methyl-1,3-propanediol;
- and a second diol comprising 1,6-hexanediol,
- wherein the first diol is employed in an amount of 40% by mole to 80% by mole based on 100% by mole of a total amount of entire diol components, and
- wherein the second dicarboxylic acid and the second diol are included in a total amount of 30% by mole or less based on 100% by mole of a total of entire dicarboxylic acid components and the entire diol components.
Dependencies are inferred from the claim text.