公开(公告)号：US20220033584A1

公开(公告)日：2022-02-03

申请号：US17276216

申请日：2019-10-23

Applicant: UNITIKA LTD.

Inventor： Makoto Nakai ,  Yuki Takubo ,  Yusuke Yagi

IPC: C08G69/28

Abstract: A flexible polyamide including a unit formed from an aliphatic dicarboxylic acid (A1) having 18 or more carbon atoms and/or a unit formed from an aliphatic diamine (B1) having 18 or more carbon atoms, wherein the polyamide has a total content of 10 to 90% by mass of the unit formed from (A1) and the unit formed from (B1) and has a melting point of 240° C. or higher.

公开(公告)号：US12180339B2

公开(公告)日：2024-12-31

申请号：US17276216

申请日：2019-10-23

Applicant: UNITIKA LTD.

Inventor： Makoto Nakai ,  Yuki Takubo ,  Yusuke Yagi

IPC: C08G69/26 ,  C08G69/28 ,  C08L77/06

Abstract: A flexible polyamide including a unit formed from an aliphatic dicarboxylic acid (A1) having 18 or more carbon atoms and/or a unit formed from an aliphatic diamine (B1) having 18 or more carbon atoms, wherein the polyamide has a total content of 10 to 90% by mass of the unit formed from (A1) and the unit formed from (B1) and has a melting point of 240° C. or higher.

公开(公告)号：US10584212B2

公开(公告)日：2020-03-10

申请号：US15564678

申请日：2016-04-06

Applicant: UNITIKA LTD.

Inventor： Yumeto Fukubayashi ,  Makoto Nakai ,  Akira Shigeta ,  Munenori Yamada

IPC: C08G73/14 ,  C08L79/08

Abstract: The present invention is to provide a polyamide-imide which has a high regularity of molecular structure and few branched structures, does not contain hydrogen halide, is not required to be separated and purified in post processes, and can be suitably used as a film, a varnish, or a molding material; raw material salt of polyamide-imide and production method thereof.The polyamide-imide has a repeating unit represented by the general formula (1): in which R1, R2 represent independently a divalent residue having an aromatic ring, an aliphatic ring or an aliphatic hydrocarbon; R3, R4 represent independently a trivalent residue having an aromatic ring or an aliphatic ring; and an hydrogen atom bonding to the respective rings may be replaced by another atom or an atomic group.