THERMOPLASTIC POLYESTER ELASTOMER, RESIN COMPOSITION CONTAINING SAID ELASTOMER, AND MOLDED ARTICLES OBTAINED FROM THESE

WIPO Patent Application WO/2022/209605

A1

Provided is a thermoplastic polyester elastomer which is excellent especially in terms of extrusion moldability and extrusion molding stability and from which hollow continuous molded articles can be stably produced in even thicknesses over a long period. The polyester elastomer comprises a hard segment comprising a polyester formed from an aromatic dicarboxylic acid and an aliphatic or alicyclic diol and, bonded to the hard segment, a soft segment comprising an aliphatic polycarbonate and has terminal groups, at least some of which have been blocked with a reactive compound, the reactive compound including polycarbodiimide. The polyester elastomer has an acid value of 15 eq/ton or less. Under the conditions of 230°C, the polyester elastomer has (i) a melt viscosity, as measured after 5-minute preheating at a shear rate of 10 /sec, of 1,800 Pa·s or higher and a melt viscosity, as measured after 5-minute preheating at a shear rate of 1,000 /sec, of 800 Pa·s or less and has (ii) a ratio between the melt viscosities at a shear rate of 10 /sec respectively measured after 5-minute preheating and after 25-minute preheating of 0.7-1.3.

TAMASHIRO YUKI (JP)
AKAISHI TAKUYA (JP)
AYUZAWA YOSHITAKA (JP)

PCT/JP2022/009688

October 06, 2022

March 07, 2022

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TOYO BOSEKI (JP)

C08L67/02; C08G63/64; C08G63/91; F16L11/04

WO2018174129A1	2018-09-27
WO2021172348A1	2021-09-02

JP2011094000A	2011-05-12
JP2008115197A	2008-05-22
JPH1017657A	1998-01-20
JP2003192778A	2003-07-09
JP4244067B2	2009-03-25

KAZAHAYA, Nobuaki et al. (JP)

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