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These active sunscreen compounds (and the active amounts thereof) generally are selected to provide a desired sun protection factor (SPF).
This SPF rating is expressed mathematically by the ratio of the irradiation time required to attain the erythema-forming threshold with the UV screening agent present to the time required to attain the same threshold in the absence of the UV screening agent.
Several such solubilizers are known, e.g., ethyl benzoate or a Ci alkyl benzoate; however, the former compound is a strong irritant, and the latter is only a mediocre solvent for avobenzone and benzophenone-3.
An active sunscreen agent which absorbs irradiation in the UV-B range generally contributes much of the SPF rating to a sunscreen composition.
Thus, high SPF values ordinarily are obtained by incorporating a large amount of a UV-B absorbing sunscreen compound therein, e.g., octylmethoxy cinnamate and benzophenone-3. 4,985,238; 5,302,381 ; 5,376,362; 5,417,963; 5,482,702; and 5,486,355.
For example, a fixative hair composition should be capable of adding luster to treated hair; and a color cosmetic such as lipstick should impart shine to the lips of the user. (Perchlorates are an explosion hazard, and dichloromethane is not acceptable in personal care applications.) It has also been prepared from 2-phenylethanol and benzoic anhydride in Λ/,/V-dimethylformamide solvent with equimolar 1 ,1 ,3,3-tetramethylguanidine (Kim et al., Bull. A further object of this invention to provide an antiperspirant composition which leaves a reduced visible residue on the skin of the user.
Leather, imitation leather and other plastics often find high shine a desirable appearance. (The selenium and phosphorous by-products create a toxic waste problem, and tetrahydrofuran is not acceptable in personal care applications.) They have also been condensed in toluene with catalytic (ca. Another object of the invention is to provide an antiperspirant composition containing an additive preferably having a refractive index which substantially matches the refractive index of the white, chalky residue formed after use thereby significantly reducing the appearance of the visible white, chalky residue on the skin of the user.
An active or functional organic compound is solubilized in a diaryl organic compound having a polar or polarizable functional group therein, as a solvent, cosolvent or additive, to form a composition thereof.
Representative active or functional organic compounds include those present in personal care...
These and other objects and features of the invention will be made apparent from the following description.
SUMMARY OF THE INVENTION What is described herein is a composition of an active or functional organic compound which is solubilized in a diaryl organic compound containing a polar or polarizable functional group.
These compositions generally tend to fall into one of two classes: emulsion sticks and suspensoid sticks.