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Patent Agency Ranking
公开(公告)号：US20210238348A1
公开(公告)日：2021-08-05
申请号：US17056981
申请日：2019-03-19
Inventor： Jeyoung PARK , Dong Yeop OH , Sung Yeon HWANG , Hyun Gil CHA , Jong Geon JEGAL , Ho Jun KIM , Seul A PARK
Abstract: The present disclosure relates to a method for preparing an aramid nanofiber dispersion. More specifically, the present invention relates to a method for preparing aramid nanofibers in a short time from aromatic polyamide-based polymers other than fibers, and to aramid nanofibers prepared therefrom.
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公开(公告)号：US20220373406A1
公开(公告)日：2022-11-24
申请号：US17773424
申请日：2020-11-11
Inventor： Jeyoung PARK , Sung Yeon HWANG , Dong Yeop OH , Sejin CHOI , Seon Mi KIM
IPC: G01K11/00
Abstract: The present invention relates to a temperature-change sensing substrate comprising a self-healing polyurethane polymer. More specifically, the present invention relates to a temperature-change sensing substrate having a self-healing polyurethane polymer matrix and a plurality of pores dispersed in the matrix. The temperature-change sensing substrate according to the present invention can be applied as a temperature-change sensor for preventing the spoiling of refrigerated or frozen food and medical supplies. For example, substrate, which was opaque when stored at −60° C., −50° C., −30° C., −20° C., −10° C. and the like, becomes transparent if the temperature rises to 0° C., 10° C., 20° C., 30° C. and the like, and thus a temperature-change sensor capable of checking storage conditions through a change in light transmittance can be provided.
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公开(公告)号：US20220073744A1
公开(公告)日：2022-03-10
申请号：US17419860
申请日：2020-09-28
Inventor： Sung Yeon HWANG , Jeyoung PARK , Dong Yeop OH , Hyeon Yeol JEON , Seul A PARK , Young Ho EOM
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.
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公开(公告)号：US20220282048A1
公开(公告)日：2022-09-08
申请号：US17597430
申请日：2020-05-28
Inventor： Sung Yeon HWANG , Jeyoung PARK , Dong Yeop OH , Tae Ho KIM , Si Gyeong LEE , Myung Suk SHIN , Jong Geon JEGAL
Abstract: A biodegradable composite material which is produced by polymerizing a mixture of an aqueous dispersion of a natural polymer nanofiber including any one or more of a chitin nanofiber and a cellulose nanofiber, a dicarboxylic acid or a derivative thereof, and a diol. The biodegradable composite material has excellent biodegradable and mechanical properties.
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公开(公告)号：US20200157271A1
公开(公告)日：2020-05-21
申请号：US16618582
申请日：2018-07-11
Inventor： Sung Yeon HWANG , Jeyoung PARK , Dong Yeop OH , Jong Geon JEGAL , Seon Mi KIM , Hyeon Yeol JEON
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.
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