C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/65 (2006.01) C08G 18/10 (2006.01) C08G 18/38 (2006.01) C08G 18/66 (2006.01) D01F 6/70 (2006.01)
Patent
CA 2445603
A polyurethane which is obtained from ingredients comprising a high-molecular polyol, an organic polyisocyanate, and a chain extender comprising a specific trifunctional isocyanurate compound having an aromatic hydroxyl group and/or a benzylic hydroxyl group, and which has a crosslinked structure due to the isocyanurate compound. The polyurethane has excellent elastic recovery, and the urethane bonds at the crosslinking sites reversibly undergo cleavage and bonding at a certain temperature. From this polyurethane can therefore be produced an elastic fiber which can be thermally set in a high degree at temperatures not lower than a certain temperature and which, after the thermal setting, has the same excellent elastic recovery as the fiber which has not undergone thermal setting.
L'invention concerne une polyuréthanne comprenant les éléments suivants: polyol de masse moléculaire élevée, polyisocyanate organique, allongeur de chaîne à composé d'isocyanurate trifonctionnel spécifique ayant un groupe hydroxyle aromatique et/ou un groupe hydroxyle benzylique, avec structure réticulée due au composé d'isocyanurate. Le produit offre les qualités suivantes: excellente reprise élastique, clivage et liaison réversibles des liaisons uréthanne aux sites de réticulation à une certaine température. On peut donc utiliser ce produit pour fabriquer une fibre élastique thermodurcissable selon un degré élevé à des températures non inférieures à une certaine température, et conservant après l'opération la même excellente reprise élastique qu'auparavant.
Ishimaru Futoshi
Masui Takashi
Takashima Hajime
Battelle (memorial Institute)
Furman & Kallio
Ishimaru Futoshi
Masui Takashi
Takashima Hajime
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