| 摘要 |
PURPOSE:To obtain an ultraviolet ray absorber, containing a furanone derivative as an active ingredient, having high stability to heat and light without toxicity and irritancy to the skin, capable of exhibiting excellent ultraviolet ray absorptivity and good in solubility and miscibility with organic solvents, etc. CONSTITUTION:An ultraviolet ray absorber containing a furanone derivative expressed by the formula [R is H, OR<1>, NH2 or N(R<1>)2; R<1> is 1-4C alkyl] as an active ingredient. In use, the amount of the blended above-mentioned absorber is about 0.01-30wt.%, preferably about 0.1-10wt.% in the composition. Furthermore, 2,2-dimethyl-5(p-methoxyphenyl)-(2H)-furanone that is a compound wherein R is OMe in the aforementioned compound expressed by the formula which is the active ingredient can be readily synthesized from a p-halogenated anisole and 3-methyl-1-buten-3-ol. |
