US 12,275,844 B2
Process for the production of a formulation containing poly(lactic acid) and aliphatic and/or aromatic polyesters and products using it
Augusto Sá Alves Da Silva, Esmoriz (PT); Rafael Alexandre Costa Rebelo, Moimenta da Beira (PT); Jorge Fernando Jordão Coelho, Coimbra (PT); Arménio Coimbra Serra, Coimbra (PT); and Camila Tebaldi Marques, Valongo (PT)
Assigned to SICOR-SOCIEDADE INDUSTRIAL DE CORDOARIA, Cortegaca Ovr (PT); and SA UNIVERSIDADE DE COIMBRA, Coimbra (PT)
Filed by Sicor—Sociedade Industrial de Cordoaria, SA, Cortegaça Ovr (PT); and Universidade de Coimbra, Coimbra (PT)
Filed on Mar. 16, 2022, as Appl. No. 17/655,043.
Application 17/655,043 is a continuation of application No. PCT/IB2020/058606, filed on Sep. 16, 2020.
Claims priority of application No. 115781 (PT), filed on Sep. 16, 2019.
Prior Publication US 2022/0204756 A1, Jun. 30, 2022
Int. Cl. B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/91 (2019.01); C08J 3/00 (2006.01); C08L 67/04 (2006.01); D01D 5/12 (2006.01); D01D 5/42 (2006.01); D01F 6/92 (2006.01); D01F 6/96 (2006.01); B29K 67/00 (2006.01); B29L 7/00 (2006.01)
CPC C08L 67/04 (2013.01) [B29C 48/0018 (2019.02); B29C 48/0022 (2019.02); B29C 48/08 (2019.02); B29C 48/91 (2019.02); C08J 3/005 (2013.01); D01D 5/12 (2013.01); D01D 5/423 (2013.01); D01F 6/92 (2013.01); D01F 6/96 (2013.01); B29K 2067/046 (2013.01); B29L 2007/007 (2013.01); C08J 2367/04 (2013.01); C08J 2467/00 (2013.01); C08L 2203/12 (2013.01); C08L 2205/025 (2013.01)] 10 Claims
 
1. Process for the preparation of a granulated plasticizing formulation characterized by comprising the following steps:
a) Preparation of a mixture of 71% to 94% by mass of PLA and 6% to 29% by mass of an aliphatic and/or aromatic polyester and other agents,
b) Feeding of said mixture obtained in (a) an extruder with extrusion temperatures ranging from 130° C. to 190° C. and elongation in a ratio ranging from a minimum of 1:5 to a maximum of 1:12 with an intermediate thermal treatment process with temperatures ranging from 85° C. to 120° C.