Biomass-resource-derived polyester and production process thereof
AssigneeMitsubishi Chemical Corporation
InventorsTakayuki Aoshima, Yasuaki Miki, Katsuhisa Kumazawa, Satoshi Katou, Tadashi Uyeda, Toyomasa Hoshino, Noboru Shintani, Kenji Yamagishi, Atsushi Isotani
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Abstract
The present invention provides a resin capable of contributing greatly to solve environmental problems and problems related to exhaustion of fossil fuel resources and having physical properties suited for practical use. The polyester according to the present invention has a diol and a dicarboxylic acid as constituent components and has an amount of terminal acid of 50 equivalents/metric ton or less.
Claims31
A biomass-resource-derived polyester comprising as the main repeating units thereof a dicarboxylic acid unit and a diol unit, wherein at least one of the dicarboxylic acid and diol units used as raw materials of the polyester is obtained from biomass resources;
- a nitrogen content in the polyester, except nitrogen atoms covalently bonded in the functional groups of the polyester, is 0.01 to 1000 ppm in terms of a mass ratio, wherein an amount of terminal acid in the polyester is 100 equivalents/ton or less;
- and an amount of sulfur in the polyester is 0.1 ppm or greater.
A process for producing a biomass-resource-derived polyester comprising a dicarboxylic acid and diol units as main repeating units, comprising:
- reacting a dicarboxylic acid and a diol, wherein at least one of the dicarboxylic acid and diol units provided as raw materials for the reaction is derived from biomass resources;
- the nitrogen atom content in at least one of said dicarboxylic acid as raw material and the diol as raw material is, in terms of a mass ratio, 0.01 ppm or greater but not greater than 2000 ppm relative to the total amount of the raw materials;
- said polyester has an amount of terminal acid of 100 equivalents/metric ton or less;
- and an amount of sulfur in the polyester is 0.1 ppm or greater.
A process for producing a biomass-resource-derived polyester comprising a dicarboxylic acid unit and a diol unit as main repeating units, comprising:
- reacting a dicarboxylic acid and a diol, wherein at least one of the dicarboxylic acid and diol units provided as raw materials for the reaction is derived from biomass resources;
- and the sulfur atom content in at least one of the dicarboxylic acid as raw material and the diol as raw material is, in terms of a mass ratio, 0.1 ppm or greater but not greater than 100 ppm relative to the total amount of the raw materials.
A biomass-resource-derived polyester resin composition, which comprises 99.9 to 0.1 wt. % of a polyester as claimed in any one of claims 1, 10 or 11 and 0.1 to 99.9 wt. % of a thermoplastic resin, biodegradable resin, natural resin or polysaccharide.
A biomass-resource-derived polyester comprising as the main repeating units thereof a dicarboxylic acid unit and a diol unit, wherein at least one of the dicarboxylic acid and diol units used as raw materials of the polyester is obtained from biomass resources and wherein the sulfur atom content in the polyester is, in terms of a mass ratio, 0.1 ppm or greater but not greater than 50 ppm relative to the polyester.
Dependencies are inferred from the claim text.