公开(公告)号：US20200376822A1

公开(公告)日：2020-12-03

申请号：US16622322

申请日：2018-04-05

Applicant: BASF SE

Inventor： Robert LOOS ,  Joerg AUFFERMANN ,  Norbert EFFEN ,  Nora SCHLUTT ,  Carsten SINKEL ,  Jerome LOHMANN ,  Gabriel SKUPIN ,  Andreas KUENKEL

IPC: B32B27/36 ,  B32B27/08 ,  B32B27/20 ,  B32B27/22

Abstract: The invention relates to a biodegradable three-layer polyester film of 8 to 20 μm in thickness having a layer construction NB/C or preferably A/B/A, wherein the two outer layers (A) or (A, C) are composed of: Ai) 55% to 99.99% by weight based on the polyester mixture of the outer layers of a polyester selected from the group consisting of: polybutylene sebacate-co-terephthalate, polybutylene sebacate-co-adipate-co-terephthalate, polybutylene sebacate-co-succinate-co-terephthalate or mixtures thereof or a mixture of polybutylene sebacate-co-terephthalate and polybutylene adipate-co-terephthalate; Aii) 0.01% to 5% by weight based on the polyester mixture of the outer layers of at least one additive selected from the group consisting of: a wax, a plasticizer, a nucleating agent, antifogging agents, fillers and an antiblocking agent; and Aiii) 0% to 44.99% by weight based on the polyester mixture of the outer layers of a further biodegradable polymer selected from the group consisting of: polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate, polypropylene carbonate (PPC) or polyester produced from aliphatic dicarboxylic acids and an aliphatic dihydroxy compound; and the middle layer B is composed of: Bai) 40% to 75% by weight based on the mixture of the middle layer of a biodegradable aliphatic-aromatic polyester; Baii) 25% to 40% by weight based on the mixture of the middle layer of starch having a plasticizer content of 0% to 5% by weight based on the total weight of the component Baii); and Baiii) 0% to 20% by weight based on the mixture of the middle layer of a further biodegradable polymer selected from the group consisting of: polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate, polypropylene carbonate (PPC) or polyester produced from aliphatic dicarboxylic acids and an aliphatic dihydroxy compound; or Bbi) 25% to 70% by weight based on the mixture of the middle layer of a biodegradable aliphatic-aromatic polyester; Bbii) 30% to 55% by weight based on the mixture of the middle layer of starch having a plasticizer content of 5% to 35% by weight based on the total weight of the component Bbii); and Bbiii) 0% to 20% by weight based on the mixture of the middle layer of a further biodegradable polymer selected from the group consisting of: polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate, polypropylene carbonate (PPC) or polyester produced from aliphatic dicarboxylic acids and an aliphatic dihydroxy compound.

公开(公告)号：US20190202087A1

公开(公告)日：2019-07-04

申请号：US16323664

申请日：2017-08-01

Applicant: BASF SE

Inventor： Jerome LOHMANN ,  Peter GUTMANN ,  Bangaru Dharmapuri Sriramulu SAMPATH ,  Andreas KUENKEL ,  Juergen AHLERS ,  Uwe KEPPELER ,  Thomas HEITZ ,  Jens-Uwe SCHIERHOLZ

IPC: B29B9/06 ,  B29B9/14 ,  B29C48/00 ,  C08L67/02

CPC classification number: B29B9/065 ,  B29B9/12 ,  B29B9/14 ,  B29B9/16 ,  B29C44/3461 ,  B29C44/445 ,  B29C48/0012 ,  B29C48/0022 ,  B29K2033/04 ,  B29K2105/0005 ,  B29K2995/0063 ,  C08J9/0061 ,  C08J9/0066 ,  C08J9/122 ,  C08J9/16 ,  C08J9/232 ,  C08J9/236 ,  C08J9/34 ,  C08J2201/026 ,  C08J2201/03 ,  C08J2203/06 ,  C08J2203/182 ,  C08J2300/16 ,  C08J2367/02 ,  C08J2400/16 ,  C08J2467/02 ,  C08L67/02 ,  C08L2203/14

Abstract: The invention relates to a process for production of expanded foam beads of one or more polyesters based on aliphatic or aliphatic and aromatic dicarboxylic acids and aliphatic diols, comprising the steps of: (a) melting the polyester and admixing the polyester with 1 to 3.5 wt %, based on the polyester, of a carbon dioxide and/or nitrogen blowing agent and also 0.1 to 2 wt % of a nucleating agent, and pressing the nucleated polyester melt, containing blowing agent, through a perforated disk controlled to a temperature between 150° C. and 185° C. and into a pelletizing chamber, (b) using a cutting device to comminute the polymer melt pressed through the perforated disk into individual expanding pellets, (c) discharging the pellets from the pelletizing chamber into a stream of water which is at a temperature of 5 to 90° C. and a pressure of 0.1 bar to 20 bar above ambient pressure.

公开(公告)号：US20220195113A1

公开(公告)日：2022-06-23

申请号：US17612246

申请日：2020-05-19

Applicant: BASF SE

Inventor： Timo Benjamin WITT ,  Norbert EFFEN ,  Jerome LOHMANN ,  Motonori YAMAMOTO ,  Andreas KUENKEL

IPC: C08G63/90 ,  C08G63/183 ,  C08G63/80

Abstract: The present invention relates to a continuous process for purifying an aliphatic-aromatic polyester constructed from aliphatic dicarboxylic acids, aromatic dicarboxylic acids and aliphatic diols in a degassing apparatus, wherein the crude polyester is degassed for 3 to 30 minutes at a pressure of 0.01 to 5 mbar in the presence of 1% to 7% by weight, based on the total weight of the crude polyester, of an entraining agent.