摘要:
L'invention concerne un polyester comprenant des motifs éthylène 2,5 furanedicarboxylate et des motifs diéthylène glycol, ledit polyester présentant une température de fusion Tf supérieure ou égale à 225°C, une viscosité intrinsèque supérieure ou égale à 0,65 dL/g, et dans lequel la teneur en motif diéthylène glycol, noté DEG, est inférieure à 4%mol et la quantité de fonctions ester situées en bout de chaîne est inférieure à 100 meq/kg, ainsi qu'un procédé de production de polyester.
摘要:
The invention relates to microparticles and compositions thereof as each of them is described in the specification. The invention further relates to microparticles obtained by a process as described in the specification, compositions thereof. The invention further relates to cured compositions as well as to objects or kits-of-parts comprising the microparticles of the invention and/or the compositions thereof and/or the cured compositions thereof. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for lowering the gloss of coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making soft-touch coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making soft-touch matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making 3D-printed objects. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making absorbent and superabsorbent objects.
摘要:
L'invention se rapporte au domaine des polymères et concerne un procédé de cristallisation de polyester. Plus particulièrement, il s'agit d'un procédé de cristallisation comprenant une étape de fourniture d'un polyester comprenant au moins un motif 1,4:3,6-dianhydrohexitol, une étape de fourniture d'un additif empêchant la coalescence, et une étape de cristallisation dudit polyester semi-cristallin. Le procédé selon l'invention permet de fortement limiter, voire de supprimer, le phénomène d'agglomération des granulés du polyester pendant la cristallisation.
摘要:
Verfahren und Anlage zur Herstellung von Polyethylenterephthalat (PET)-Granulat durch Umesterung von Dimethylterephthalat mit Ethylenglycol oder durch Veresterung von (faser-)reiner Terephthalsäure mit Ethylenglycol, geeignet zur Weiterverarbeitung zu Verpackungsfolie und Flaschen, umfassend die Schritte Polykondensation, Granulierung und Latentwärmekristallisation, Nachbehandlung des Rohgranulats zur Einstellung der für die Weiterverarbeitung erforderlichen Polymerqualitätswerte, insbesondere der intrinsischen Viskosität, des Acetaldehyd- und des Feuchtegehaltes, wobei die Nachbehandlung in mehreren, parallel betriebenen Wanderbettrohrreaktoren erfolgt.
摘要:
A process and apparatus which reduces the fines in a liquid discharge stream and/or increases the dryness of a solids discharge stream while under a pressure equal to or greater than the vapor pressure of the liquid. There is provided a process for separating particles such as polyethylene terephthalate or polyethylene naphthalate from a liquid in a slurry comprising: a. feeding a slurry comprising solid particles and a liquid into a within a separation zone maintained at a pressure equal to or greater than the vapor pressure of the liquid; b. contacting the slurry in the separation zone with a porous filter, optionally a microfilter, nanofilter, reverse osmosis filter, or ultrafilter, and separating liquid from the particles, wherein the liquid flows through the filter into an outer annulus defined as a space between the wall of the separation device and the filter, and said porous filter optionally having a terminal point beyond which the separated liquid does not pass from the outer annulus back through the filter; c. accumulating no liquid in the outer annulus or accumulating liquid in the outer annulus at a level below or in front of the terminal point, and continuously discharging the separated liquid from the outer annulus through a liquid outlet; d. decoupling the particles from the separation zone through the solids outlet to a low pressure below the vapor pressure of the liquid at the liquid temperature within the separation zone while maintaining a pressure on the particles prior to decoupling at or above the vapor pressure of the liquid within the separation zone.
摘要:
Cellular thin films include a first side separated from a second side, the separation of which defines the thickness of the thin film; at least one layer of a polymeric material arranged along the thickness of the thin film, wherein the polymeric material includes cells and the first and second sides of the thin film have exterior surfaces that have substantially the same thickness as the interior walls forming the cells. The surfaces of the thin films have bumps caused by the cells. The thin exterior surfaces of the thin films is advantageous to allow the films to be flexible.
摘要:
Cellular thin films include a first side separated from a second side, the separation of which defines the thickness of the thin film; at least one layer of a polymeric material arranged along the thickness of the thin film, wherein the polymeric material includes cells and the first and second sides of the thin film have exterior surfaces that have substantially the same thickness as the interior walls forming the cells. The surfaces of the thin films have bumps caused by the cells. The thin exterior surfaces of the thin films is advantageous to allow the films to be flexible.