公开(公告)号：US20200157271A1

公开(公告)日：2020-05-21

申请号：US16618582

申请日：2018-07-11

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Sung Yeon HWANG ,  Jeyoung PARK ,  Dong Yeop OH ,  Jong Geon JEGAL ,  Seon Mi KIM ,  Hyeon Yeol JEON

IPC: C08G18/38 ,  C08G18/48 ,  C08G18/66 ,  C08G18/75 ,  C08G18/24 ,  C08G18/73 ,  C08J5/18 ,  C08G18/72

Abstract: A self-restoring polyurethane-based polymer obtained by polymerization of a composition containing an aromatic disulfide diol represented by Chemical Formula, HO—Ar1—S—S—Ar2—OH, an alicyclic polyisocyanate, and a polyol. Ar1 and Ar2 each are independently a substituted or unsubstituted C6-C30 arylene group. The composition satisfies Equation, 0.1≤M[disulfide]/M[OH]. M[disulfide] is a total mole number of the aromatic disulfide diol in the composition, and M[OH] is a total mole number of the aromatic disulfide diol and the polyol in the composition.

公开(公告)号：US20220073744A1

公开(公告)日：2022-03-10

申请号：US17419860

申请日：2020-09-28

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Sung Yeon HWANG ,  Jeyoung PARK ,  Dong Yeop OH ,  Hyeon Yeol JEON ,  Seul A PARK ,  Young Ho EOM

IPC: C08L81/06 ,  C08L79/08 ,  C08L71/12 ,  C08G73/10 ,  C08J5/00 ,  C08J5/04

Abstract: The present invention relates to a polymer composite material comprising an aramid nanofiber (ANF), and a method for preparing same. More specifically, the present invention relates to an arylene ether-based polymer or arylene ether imide-based polymer composite material which is obtained by mixing an arylene ether-based polymer or an arylene ether imide-based polymer with aramid nanofibers dispersed in a polar aprotic solution or by adding and polymerizing monomers in the dispersion of aramid nanofibers.

公开(公告)号：US20200216660A1

公开(公告)日：2020-07-09

申请号：US16625260

申请日：2018-06-20

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Yeop OH ,  Jong Geon JEGAL ,  Sung Yeon HWANG ,  Je Young PARK ,  Tae Ho KIM ,  Hyeon Yeol JEON

IPC: C08L67/02 ,  C08L1/02

Abstract: A polybutylene succinate (PBS) nanocomposite material includes a matrix comprising polybutylene succinate chains, and nanocelluloses dispersed between the polybutylene succinate chains. The PBS composite material may be produced by polymerizing 1,4-butanediol and succinic acid or a derivative thereof in a mixture of 1,4-butanediol and succinic acid or a derivative thereof with nanocelluloses. The PBS nanocomposite material and the method have improved properties, which does not require a surface hydrophobization pretreatment process of cellulose, melt kneading, and solution mixing processes.