US 12,390,971 B2
Process and system for blending a plasticizer with a polysaccharide ester polymer
Joseph Grenci, Florence, KY (US)
Assigned to Celanese International Corporation, Irving, TX (US)
Filed by Celanese International Corporation, Irving, TX (US)
Filed on Jan. 13, 2023, as Appl. No. 18/096,907.
Claims priority of provisional application 63/299,596, filed on Jan. 14, 2022.
Prior Publication US 2023/0226735 A1, Jul. 20, 2023
Int. Cl. B29C 48/16 (2019.01); B29C 48/00 (2019.01); B29C 48/285 (2019.01); B29K 1/00 (2006.01); B29K 105/00 (2006.01); C08L 1/12 (2006.01)
CPC B29C 48/16 (2019.02) [B29C 48/022 (2019.02); B29C 48/288 (2019.02); C08L 1/12 (2013.01); B29K 2001/12 (2013.01); B29K 2005/00 (2013.01); B29K 2105/251 (2013.01); C08L 2310/00 (2013.01); C08L 2666/34 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process for producing a polysaccharide ester polymer product comprising:
feeding polysaccharide ester polymer particles into a heated extruding device, the heated extruding device defining a heated barrel having a length;
after the polysaccharide ester polymer particles have been heated, combining the polysaccharide ester particles with a first quantity of a first plasticizer within the heated extruding device to form a polysaccharide ester polymer and first plasticizer blend;
combining the polysaccharide ester polymer particles and first plasticizer blend with a second quantity of a second plasticizer in the heated extruding device downstream from where the polysaccharide ester polymer particles were combined with the first plasticizer; and
discharging a plasticized polysaccharide ester polymer product from the heated extruding device;
wherein the first plasticizer is added to the plasticized polysaccharide ester polymer product in relation to the second plasticizer at a weight ratio of from about 1:2 to about 1:12.