Kraft lignin and method for producing same
AssigneeDIC Corporation
InventorKenji Shomura
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Abstract
A problem of the present invention is to provide a cosmetic, an ink, a printed matter, a paint, an automotive paint, a coating, a plastic, a fiber, a film, a black matrix resist, a photo spacer resist and a cured material thereof containing a kraft lignin which cuts absorption in the ultraviolet region and which has absorption ability in the ultraviolet region and the like. It was found that, because a kraft lignin having specific peaks in an infrared absorption spectrum measured with a Fourier transform infrared spectrophotometer having an ATR unit has high ultraviolet-cutting ability and has a high L* value in color measurement with a spectrophotometer, the kraft lignin can be preferably used especially for cosmetic uses, and the problem could be thus solved.
Claims8
A kraft lignin, wherein the ratio of the heights of the absorption peak of 1480 to 1540 cm−1 and the absorption peak of 3000 to 3600 cm−1 (1480 to 1540 cm−1/3000 to 3600 cm−1) is in the range of 3.0 to 6.0 in an infrared absorption spectrum measured with a Fourier transform infrared spectrophotometer having an ATR unit (ATR-FT-IR), and the L* value is in the range of 61 to 80 in color measurement with a spectrophotometer.
Dependencies are inferred from the claim text.