- Preparation method for bisbenzoxazinone ultraviolet absorber
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The invention discloses a preparation method for a bisbenzoxazinone ultraviolet absorber. The preparation method comprises the following steps: (1) reacting terephthalic acid with methyl anthranilatein the presence of a catalyst and an inert solvent to obtain a methyl bisamide ester intermediate; and (2) subjecting the methyl bisamide ester intermediate to heating, reflux and ring closure in thionyl chloride to obtain the bisbenzoxazinone ultraviolet absorber. The preparation method of the invention adopts borate as a catalyst and eliminates an inorganic alkali reagent through dehydration amidation so as to eliminate metal ion residues from the source; the results of metal ion residue analysis show that the residues of common metal ions such as sodium, potassium, iron, chromium and aluminum are all 50 ppm or below; so the use of post-treatment reclaimed water is significantly reduced, by-produced inorganic salts and salty wastewater are eliminated, and the generation and discharge ofwaste water, waste gas and industrial residues are reduced.
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Paragraph 0021; 0023-0024; 0031; 0033
(2019/11/21)
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- BISBENZOXAZINONE COMPOUND
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It is an object of the present invention to provide a bisbenzoxazinone compound which does not substantially contain an alkali metal salt, has high purity and provides a resin composition having excellent resistance to hydrolysis when it is contained in a resin, a production method thereof, and a resin composition comprising the compound. The present invention is a bisbenzoxazinone compound represented by the following formula (4): (R1 and R2 are each independently a hydrogen atom, hydroxyl group, alkyl group having 1 to 3 carbon atoms, or the like), and has (i) a purity of 98% or more, (ii) a content of a compound represented by the following formula (7) of less than 0.15 wt %: (iii) a maximum peak in the measurement of the light reflectance at a visible range of its powder at 380 to 480 nm and a maximum light reflectance of 100 to 120%, (iv) a metal sodium content of less than 50 ppm and (v) a YI value of ?10 to 10.
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Page/Page column 12
(2012/10/08)
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- BIS-BENZOXAZINONE COMPOUND
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It is an object of the present invention to provide a bisbenzoxazinone compound which does not substantially contain an alkali metal salt, has high purity and provides a resin composition having excellent resistance to hydrolysis when it is contained in a resin, a production method thereof, and a resin composition comprising the compound. The present invention is a bisbenzoxazinone compound represented by the following formula (4): (R1 and R2 are each independently a hydrogen atom, hydroxyl group, alkyl group having 1 to 3 carbon atoms, or the like), and has (i) a purity of 98 % or more, (ii) a content of a compound represented by the following formula (7) of less than 0.15 wt%: (iii) a maximum peak in the measurement of the light reflectance at a visible range of its powder at 380 to 480 nm and a maximum light reflectance of 100 to 120 %, (iv) a metal sodium content of less than 50 ppm and (v) a YI value of -10 to 10.
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Page/Page column 20-21
(2012/10/18)
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- METHOD OF PRODUCING BENZOXAZINONE-BASED COMPOUND
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A method of producing a compound represented by Formula (I), which comprises a step A of reacting an anthranilic acid compound with a carboxylic halide in the absence of a base, but does not comprise a step of isolating of an amide intermediate compound represented by Formula (II): wherein R1 represents a substituent; n1 is an integer of 0 to 4; R2 represents an n2-valent substituent or a linking group; and n2 is an integer of 1 to 4.
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Page/Page column 18; 19
(2009/05/29)
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- Ultraviolet ray-absorbing cosmetic composition
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The cosmetic composition of this is an ultraviolet ray-absorbing cosmetic composition containing particles of cyclic imino ester which is excellent in ultraviolet ray absorbability, stable against water, sparingly soluble in organic solvents, fats and oils, sebum, etc., and further has only a low skin-irritating property. When this cosmetic composition is applied onto the skin, erythema is not formed on/in the skin even if it is exposed to sunlight for a long period, and further aging of the skin can be prevented.
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