Biomass-resource-derived polyurethane, method for producing same, and biomass-resource-derived polyester polyol
The invention relates to a method for producing a biomass-resource-derived polyurethane, which comprises: reacting a dicarboxylic acid and an aliphatic diol to produce a polyester polyol; and reacting the polyester polyol and a polyisocyanate compound, wherein the dicarboxylic acid contains at least one component derived from biomass resources, a content of an organic acid in the dicarboxylic acid is more than 0 ppm and not more than 1,000 ppm relative to the dicarboxylic acid, and a pKa value of the organic acid at 25° C. is not more than 3.7.
1. A biomass-resource-derived polyurethane, comprising, in reacted form:
a polyester polyol unit having a number average molecular weight of 500 to 4,500, calculated in terms of a hydroxyl number, and comprising, in reacted form:
an organic acid unit having a pKa value at 25° C. of not more than 3.7;
a dicarboxylic acid unit other than the organic acid unit having a pKa value at 25° C. of not more than 3.7; and
an aliphatic diol unit; and
a polyisocyanate unit,
wherein the dicarboxylic acid unit comprises at least one component derived from biomass resources, and a content of the organic acid unit is more than 0% by mole and not more than 0.09% by mole relative to the dicarboxylic acid unit.
2. The biomass-resource-derived polyurethane according to claim 1 , wherein the dicarboxylic acid comprises succinic acid derived from biomass resources.
3. The biomass-resource-derived polyurethane according to claim 1 , wherein a content of the dicarboxylic acid unit derived from biomass resources is 20% by mole or more relative to whole dicarboxylic acid unit.
4. The biomass-resource-derived polyurethane according to claim 2 , wherein a content of the dicarboxylic acid unit derived from biomass resources is 20% by mole or more relative to whole dicarboxylic acid unit.
5. The biomass-resource-derived polyurethane according to claim 1 , wherein at least one component of the dicarboxylic acid is an aliphatic dicarboxylic acid.
6. The biomass-resource-derived polyurethane according to claim 5 , wherein the dicarboxylic acid comprises 50% by mole or more of an aliphatic dicarboxylic acid.
7. The biomass-resource-derived polyurethane according to claim 5 , wherein the aliphatic dicarboxylic acid comprises any one of adipic acid, succinic acid, or sebacic acid.
8. The biomass-resource-derived polyurethane according to claim 6 , wherein the aliphatic dicarboxylic acid comprises any one of adipic acid, succinic acid, or sebacic acid.
9. The biomass-resource-derived polyurethane according to claim 1 , wherein the aliphatic diol unit comprises at least one of an ethylene glycol unit or a 1,4-butanediol unit.
10. The biomass-resource-derived polyurethane according to claim 1 , having a YI value (in conformity with JIS-K7105) of not more than 20.
11. The biomass-resource-derived polyurethane according to claim 1 , having a molecular weight distribution (Mw/Mn) by the GPC measurement of from 1.5 to 3.5.
12. An artificial leather comprising the biomass-resource-derived polyurethane according to claim 1 .
13. A shoe sole comprising the biomass-resource-derived polyurethane according to claim 1 .
14. The biomass-resource-derived polyurethane according to claim 1 , wherein the polyester polyol unit has a number average molecular weight of 500 to 4,000.
15. A synthetic leather comprising the biomass-resource-derived polyurethane according to claim 1 .
16. A shoe comprising the shoe sole of claim 13 .
17. A shoe comprising the artificial leather of claim 12 .
18. A shoe comprising the synthetic leather of claim 15 .
19. A bag comprising the artificial leather of claim 12 .
20. A bag comprising the synthetic leather of claim 15 .
21. A film comprising the biomass-resource-derived polyurethane according to claim 1 .
22. A coating material comprising the biomass-resource-derived polyurethane according to claim 1 .
23. An adhesive comprising the biomass-resource-derived polyurethane according to claim 1 .
24. A foam comprising the biomass-resource-derived polyurethane according to claim 1 .
25. An elastomer comprising the biomass-resource-derived polyurethane according to claim 1 .
26. The elastomer according to claim 25 , wherein the elastomer is a thermoplastic elastomer.