公开(公告)号：US20230392042A1

公开(公告)日：2023-12-07

申请号：US18133785

申请日：2023-04-12

申请人： SK microworks Co., Ltd

发明人： Sungjin CHUNG ,  Kweon Hyung HAN ,  Kwangho JANG ,  Sang Mook KIM

IPC分类号： C09D177/06 ,  B29C48/00 ,  B29C48/08

CPC分类号： C09D177/06 ,  B29C48/022 ,  B29C48/08 ,  B29C48/0011 ,  B29K2077/00

摘要： Disclosed is a paint protection film having a storage modulus measured at a temperature of n ° C. according to ASTM D4065 of En, where n is a number representing a temperature in degrees Celsius, wherein E40/E20 is 0.75 or more and 1.1 or less, wherein the paint protection film has a change index dYI of yellowness according to ASTM E313 before and after a UV irradiation, represented by Equation 1 below, of 0.8 or less, where the UV irradiation is performed for 72 hours at an output of 3 W with a light having wavelength from 280 nm to 360 nm:


dYI=|YI−UV_YI|  [Equation 1]



in Equation 1, YI is the yellowness of the paint protection film before the UV irradiation, and UV_YI is the yellowness of the paint protection film after the UV irradiation.