| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultraviolet absorbing agent which can shield effectively ultraviolet rays of not more than 290 nm and also a wide range of light from UVA to UVB. SOLUTION: The ultraviolet absorbing agent comprises 12 CaO-7 Al<SB>2</SB>O<SB>3</SB>compound which includes O<SB>2</SB><SP>-</SP>and O<SP>-</SP>ion radicals. COPYRIGHT: (C)2005,JPO&NCIPI
|
