- PIGMENT DISPERSION COMPRISING PHTHALIMIDE AND DERIVATIVE THEREOF, AND COLORING COMPOSITION
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PROBLEM TO BE SOLVED: To provide a pigment dispersion that can inhibit a rise in the viscosity of a phthalocyanine pigment dispersion, and can also inhibit the deterioration of contrast in the coating of a coloring composition containing the pigment dispersion, and provide a coloring composition. SOLUTION: A pigment dispersion contains at least one selected from a phthalimide represented by formula (1) and a derivative thereof, a phthalocyanine pigment, a dispersant and a solvent (R1-R4 are H or a halogen atom; Q is (i) H, (ii) a C1-C4 alkyl group, optionally having a substituent X binding to a terminal carbon atom, or (iii) an aryl group, optionally having a substituent Y binding to a carbon atom of an aromatic ring, where the substituent X is an acetyl group, a carboxyl group, a phosphate group or a sulfone group; the substituent Y is a methyl group, an acetyl group, a carboxyl group, a phosphate group or a sulfone group). SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
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Paragraph 0105; 0107
(2018/06/20)
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- Silicon-containing poly(esters) with halogenated bulky side groups. Synthesis, characterization and thermal studies
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Poly(esters) (PEs) derived from diacids containing bulky side groups, which have an halogenated (Cl, Br) imide ring, an aminoacidic residue (glycine, l-alanine, l-valine) and an amide group were obtained with a silicon-containing diphenol. Also PEs without the aminoacidic residue were obtained. PEs were characterized by IR and NMR spectroscopy, and the results were in agreement with the proposed structures. PEs were obtained with good yields and moderate or high ηinh values. PEs were soluble in aprotic polar solvents and were swollen in other solvents like m-cresol and THF. The Tg values were determined and it was possible to see a tendency in the sense that when the size of the atom (Cl, Br) bonded to the imidic ring is increased, the Tg values decreased, also for those PEs obtained without the aminoacidic residue. The thermal decomposition temperatures showed that only two PEs can be considered as thermostable, considering TDT values above 400°C at 10% of weight lost. The other PEs showed good thermal stability, showing in general a decrease of the TDT values when the volume of the side group, is increased. PEs showed UV-vis transparency at 400 nm lower than 20%, but between 500 and 600 nm, showed 80% transparency. PEs containing halogen atoms showed flame retardancy in a simple essay, with respect to PEs without halogen atoms in which the combustion was complete.
- Tagle,Terraza,Tundidor-Camba,Coll
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p. 49132 - 49142
(2015/06/16)
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- A facile and green synthesis of novel imide and amidic acid derivatives of phenacetin as potential analgesic and anti-pyretic agents
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Facile and green syntheses of potential analgesic and antipyretic compounds, N-(4-ethoxy-phenyl)-2-(1,3- dioxo-1,3-dihydroisoindol-2-yl)acetamide derivatives 6a-g and N-[(4-ethoxy-phenylcarbamoyl)methyl]phthalamic acid derivatives 10a-g have been developed. Two synthetic routes (A and B) have been established for the preparation of 6a-g. In the route-A, 4-ethoxyaniline 2 was reacted with chloroacetyl chloride 3 in a solution of potassium acetate and acetic acid to yield N-(4-ethoxyphenyl)-2-chloroacetamide 4. The latter was reacted with imide compounds 5a-g either in triethanolamine as a green solvent or in solid phase in the presence of TEBAC and KI to yield 6a-g. Alternatively, in the route-B, reaction of anhydrides 7a-g with glycine 8 yielded the (1, 3-dioxo-1, 3-dihydroisoindol-2-yl)acetic acid derivatives 9a-g which on reaction with 2 either in triethnolamine and DCC as a dehydrating agent or in solid phase in the presence of DCC gave 6a-g. The latter were hydrolyzed in 0.5N ethanolic KOH to afford 10a-g.
- Reddy, Yervala D.,Kumar, Padam P.,Devi, Bhoomireddy R.,Dubey, Pramod K.,Kumari, Yalamanchili B.
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- Synthesis of Nα-tetrachlorophthaloyl (TCP)-protected amino acids under microwave irradiation (MWI)
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A range of Nα-tetrachlorophthaloyl protected amino acids have been synthesized by an easy and efficient condensation procedure of the corresponding amino acid and tetrachlorophthaloyl anhydride under irradiation in an unmodified commercial microwave oven.
- Cros,Planas,Bardají
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p. 1313 - 1320
(2007/10/03)
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- Microwave-assisted rapid synthesis of α-amino-β-lactams
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A rapid and convenient approach to α-amino-β-lactams has been developed using the tetrachlorophthalimido group as a masked amino substituent. Reaction between glycine and tetrachlorophthalic anhydride in DMF for about 90 sec in a domestic microwave oven led to an imidoacetic acid in high yield; the corresponding acid chloride reacted with Schiff bases to provide mixtures of trans and cis β-lactams. Nearly exclusive formation of trans β-lactams could be achieved in some cases in a few minutes by conducting β-lactam formation under strong microwave irradiation. Facile conversion to α-amino-β-lactams was realized in 5-10 minutes via solventless reaction of these α-amino-β-lactams with ethylenediamine at room temperature.
- Bose, Ajay K.,Jayaraman,Okawa,Bari,Robb,Manhas
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p. 6989 - 6992
(2007/10/03)
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