High-molecular weight polymers and methods of manufacture

Details High-molecular weight polymers and methods of manufacture High-molecular weight polymers and methods of manufacture

A - Human Necessities

62

B

A62B 35/00 (2006.01) B60R 22/00 (2006.01) C08G 63/60 (2006.01) C08G 63/80 (2006.01) C08J 5/18 (2006.01) D01F 6/84 (2006.01) D03D 1/00 (2006.01) D03D 15/00 (2006.01)

Patent

CA 2459296

A composition comprises a solid-stated block copolymer of an aromatic polyester and a caprolactone, wherein the copolymer has been solid state polymerized such that intrinsic viscosity increases at least 20%, the caprolactone content decreases no more than 1.2% absolute and the transesterification increases no more than 3.5% absolute, and wherein the solid-stated copolymer has an intrinsic viscosity of at least 0.82. Particularly preferred chain extension reactions are performed at a temperature of less than 175~C, and even more preferably at less than 165~C. In further aspects of the inventive subject matter, yarns and methods of producing a fiber include contemplated solid-stated block copolymers.

L'invention concerne une composition comprenant un copolymère bloc à l'état solide d'un polyester aromatique et un caprolactone, ledit copolymère ayant été polymérisé à l'état solide de manière que sa viscosité intrinsèque augmente d'au moins 20 %, que la teneur en caprolactone diminue de 1,2 % absolu au maximum et que la transestérification augmente de 3,5 % absolu au maximum. Ledit copolymère à l'état solide fait preuve d'une viscosité intrinsèque d'au moins 0,82. On effectue des réactions à extension de chaîne préférées à une température inférieure à 175 ·C et de manière préférentielle inférieure à 165 ·C. Selon d'autres variantes de l'invention, les fils et les procédés d'obtention d'une fibre comprennent des copolymères blocs à l'état solide de cette invention.

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