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.
Claims18
A biomass-resource-derived polyester comprising as main repeating units thereof a dicarboxylic acid unit and a diol unit, wherein at least one of the dicarboxylic acid and diol used as raw materials of the polyester is obtained from biomass resources, an amount of terminal acid in the polyester is 50 equivalents/metric ton or less, and the nitrogen atom content in the polyester, except nitrogen atoms covalently bonded in the functional groups of the polyester, is, in terms of a mass ratio, 0.01 ppm or greater but not greater than 500 ppm relative to the polyester.
A process for producing a biomass-resource-derived polyester by reaction of a dicarboxylic acid and a diol, wherein at least one of the dicarboxylic acid as raw material and diol as raw material provided for the reaction is derived from biomass resources;
- a nitrogen atom content in the dicarboxylic acid as raw material and 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;
- and the polyester has an amount of terminal acid of 50-equivalents/metric ton or less and the nitrogen atom content in the polyester, except nitrogen atoms covalently bonded in the functional groups of the polyester, is, in terms of a mass ratio, 0.01 ppm or greater but not greater than 500 ppm relative to the polyester.
A process for producing a biomass-resource-derived polyester by reaction of a dicarboxylic acid and a diol, wherein at least one of the dicarboxylic acid as raw material and diol as raw material provided for the reaction is derived from biomass resources;
- and a sulfur atom content in the dicarboxylic acid as raw material and diol as raw material is, in terms of a mass ratio, 0.01 ppm or greater but not greater than 100 ppm relative to the total amount of the raw materials, and the nitrogen atom content in the polyester, except nitrogen atoms covalently bonded in the functional groups of the polyester, is, in terms of a mass ratio, 0.01 ppm or greater but not greater than 500 ppm relative to the polyester.
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.
Dependencies are inferred from the claim text.