Molded foam of ester-based elastomer, uses thereof, and expanded beads of ester-based elastomer
View Patent ↗An ester-based elastomer expanded molded article comprising a fusion of expanded particles that contain an ester-based elastomer as a base resin.
1. An ester-based elastomer expanded molded article comprising a fusion of expanded particles that contain an ester-based elastomer as a base resin,
wherein the ester-based elastomer contains a hard segment and a soft segment,
wherein the hard segment is formed with
a dicarboxylic acid component, and
a dicarboxylic acid component and diol component, and
wherein the soft segment is an aliphatic polyether and/or polyester, and
wherein the dicarboxylic acid component contains a terephthalic acid component and a dicarboxylic acid component other than the terephthalic acid component and contains the dicarboxylic acid component other than the terephthalic acid component at 5 to 30% by mass.
2. The ester-based elastomer expanded molded article according to claim 1 , wherein the ester-based elastomer has a heat of crystallization of 0 to 30 mJ/mg.
3. The ester-based elastomer expanded molded article according to claim 1 , wherein the ester-based elastomer contains the hard segment at 30 to 80% by mass.
4. The ester-based elastomer expanded molded article according to claim 1 , wherein the dicarboxylic acid component other than the terephthalic acid component is an isophthalic acid component.
5. The ester-based elastomer expanded molded article according to claim 1 , wherein the expanded particles in the fusion have an average cell diameter at a central part of 10 to 200 μm and an average cell diameter at a surface layer part of 50 to 300 μm.
6. The ester-based elastomer expanded molded article according to claim 1 , wherein the ester-based elastomer expanded molded article shows a density of 0.02 to 0.4 g/cm 3 and a rebound resilience of 50 to 100%.
7. The ester-based elastomer expanded molded article according to claim 1 , which is used for any of an insole, a midsole and an outsole.
8. A midsole comprising the expanded molded article according to claim 7 .
9. A sole comprising the midsole according to claim 8 .
10. Ester-based elastomer expanded particles comprising an ester-based elastomer as a base resin and capable of providing an expanded molded article that comprises a fusion of expanded particles,
wherein the ester-based elastomer contains a hard segment and a soft segment,
wherein the hard segment is formed with
a dicarboxylic acid component, and
a dicarboxylic acid component and diol component, and
wherein the soft segment is an aliphatic polyether and/or polyester, and
wherein the dicarboxylic acid component contains a terephthalic acid component and a dicarboxylic acid component other than the terephthalic acid component and contains the dicarboxylic acid component other than the terephthalic acid component at 5 to 30% by mass.
11. The ester-based elastomer expanded particles according to claim 10 , fulfilling any of the following requirements (ii) to (v):
(ii) the ester-based elastomer has a heat of crystallization of 0 to 30 mJ/mg;
(iii) the ester-based elastomer contains the hard segment at 30 to 80% by mass;
(iv) the ester-based elastomer expanded particles are capable of providing an expanded molded article in which expanded particles in the fusion have an average cell diameter at a central part of 10 to 200 μm and an average cell diameter at a surface layer part of 50 to 300 μm; and
(v) the ester-based elastomer expanded particles are capable of providing an expanded molded article showing a density of 0.02 to 0.4 g/cm 3 and a rebound resilience of 50 to 100%.
12. The ester-based elastomer expanded particles according to claim 11 , wherein the dicarboxylic acid component other than the terephthalic acid component is an isophthalic acid component.