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Patent US10450404
Issued 2019-10-22
Production Methods Of Polyester And Polyurethane
At the time of producing a polyester by using a dicarboxylic acid component and a biomass-resource-derived diol as raw materials, a polyester is efficiently produced with good color tone, as the raw material diol derived from biomass resources, a diol in which the content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 is from 0.01 to 12 ppm by mass, is used, and by controlling the content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 in the raw material diol to fall in a prescribed range, the color tone of the polyester is improved.
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- 1. A method for producing a polyester, comprising:
performing a reaction by using, as raw materials, a dicarboxylic acid component, and a diol produced directly from a biomass-resource-derived substance by a fermentation process, wherein a content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 in the diol is from 0.01 ppm to 12 ppm by mass, and wherein said diol produced directly from a biomass-resource-derived substance by a fermentation process is selected from the group consisting of ethylene glycol, 2-methyl-1,3-propanediol, neopentyl glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, and isosorbide.
- 9. A method for producing a polyester polyol, comprising:
performing reaction by using, as raw materials, a dicarboxylic acid component, and a diol produced directly from a biomass-resource-derived substance by a fermentation process, wherein a content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 in the diol is from 0.01 ppm to 12 ppm by mass, and wherein said diol produced directly from a biomass-resource-derived substance by a fermentation process is selected from the group consisting of ethylene glycol, 2-methyl-1,3-propanediol, neopentyl glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, and isosorbide.
- 18. A method for producing a polyurethane, comprising:
reacting a polyester polyol and an isocyanate compound, wherein the polyester polyol is produced by an esterification and/or transesterification reaction of a dicarboxylic acid and a diol, wherein the diol is produced directly from a biomass-resource-derived substance by a fermentation process and a content of a cyclic carbonyl compound having a carbon atom number of 5 or 6 in the diol is from 0.01 ppm to 12 ppm by mass, and wherein said diol produced directly from a biomass-resource-derived substance by a fermentation process is selected from the group consisting of ethylene glycol, 2-methyl-1,3-propanediol, neopentyl glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, and isosorbide.
