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Dispersant for salicylic acid derivatives pigments and preparation method and use thereof

A technology of salicylic acid derivatives and dispersants, which is applied in the field of dispersants for salicylic acid derivative pigments and its preparation, can solve problems such as limitation, improve coloring strength and transparency, be environmentally friendly, and have a wide range of applications Effect

Inactive Publication Date: 2009-03-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned patents or documents provide many examples of pigment modification to improve the performance of the pigment in the coloring medium, the above-mentioned pigment modifiers often introduce amine structures on the pigment intermediates, and then undergo coupling reactions Formed colored compounds, and the application is limited to a kind of pigment or several other similar colored pigments to improve the performance of inks

Method used

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  • Dispersant for salicylic acid derivatives pigments and preparation method and use thereof
  • Dispersant for salicylic acid derivatives pigments and preparation method and use thereof
  • Dispersant for salicylic acid derivatives pigments and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Dispersant A: Add B-200 (lipophilic polyether primary amine with a product name of Surfonamine B-200) with a molecular weight of 2000 to a 250ml three-necked flask, and the ratio of propylene oxide / ethylene oxide (PO / EO) is 29 / 6, Huntsman Corp.) 12 parts, salicylic acid (purity is 99.2%) 0.83 parts, stir evenly at 50 ℃, then dropwise add formaldehyde solution (37%) 0.5 part, heat up to 90 ℃ and stir for two hours, then Then the temperature was raised to 120° C. and stirred for two hours. 1 H-NMR shows a chemical shift of 3.8-3.9, which is a significant sign of Mannich base methylene, FT-IR shows that the primary amino group completely disappears, 3610mm -1 (—NH 2 ) peak disappears, resulting in a 3454mm -1 Absorption peak at (-NH-). The resulting amber liquid was used for evaluation of the pigment properties of Example 2.

[0035] Dispersant B: The method steps are the same as above, except that the primary amine B-200 used is changed to L-207 (hydrophilic polyethe...

Embodiment 2

[0037] 1 part of P.Y.83 pigment (containing 4% by weight of dispersant A) is added to 8 parts of solvent-based ink binder, which contains nitrocellulose, plus 8 parts of glass beads with a diameter of 2-3mm. The mixture was shaken on an oscillating mixer for 30 minutes to obtain a thick ink. Dilute and vibrate the obtained thick ink with binder and corresponding solvent to obtain light color ink. Compared with P.Y.83 without additives, which is formulated in the same way, the tinting strength of the inks containing additives is increased by about 5%, and they are more transparent and have lower viscosity. It shows that after adding dispersant A, the dispersibility of the pigment is improved.

Embodiment 3

[0039] 9.6 parts of P.R.57:1 pigments (containing 4% by weight of dispersant B) were added to 17.76 parts of water-based ink binders containing acrylic acid (trade name "Joncryl 61", S.C.Johnson.Co.) and Add 40 parts of glass beads with a diameter of 2-2.5 mm. The mixture was shaken on an oscillating mixer for 60 minutes to obtain a thick ink. Dilute and vibrate the obtained thick ink with pre-prepared white ink to obtain light color ink. Compared with P.R.57:1 that does not contain additives, the coloring strength of the ink is increased by about 11%, and the viscosity of the thick ink is reduced. It shows that after adding dispersant B, the dispersibility of the pigment is improved.

[0040] With salicylic acid as the parent, —CH 2—NH—is a bridging group, and the polyalkoxy structure is a branched dispersant, which can be used in solvent-based or water-based ink systems respectively. The test results show that compared with the pigment without this kind of salicylic acid ...

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Abstract

The invention relates to a dispersant used for salicylic acid derivative pigments, a preparation method and the application thereof; the dispersant has the structures of formula (I), (II) and (III) and is liquid; wherein, the matrix is salicylic acid (ortho-hydroxy benzoic acid), linking group is amine methyl-CH2NH-, and solvated chain R is alkylene oxide polymer; the preparation method comprises the following steps: polyether primary amine and the salicylic acid are heated, stirred fully and evenly, and dipped with formaldehyde solution slowly, and the amine methylating product of the salicylic acid is prepared by Mannich reaction; the application thereof lies in improving the dispersibility of lake or disazo pigments used for solvent or water-based printing ink. The dispersant of the invention is colourless and improves the colour intensity of the pigments by virtue of synergistic action of the dispersant and the pigments; the printing ink produced by adding the pigments of the dispersant has higher colour intensity, transparency and low viscosity, and is applied widely.

Description

technical field [0001] The invention belongs to the field of organic pigments and their preparation and application, in particular to a dispersant for salicylic acid derivative pigments and its preparation method and application. Background technique [0002] Organic pigments must be effectively dispersed to color objects, and then adjust the affinity or compatibility of the coloring medium solvent and the resin binder. One of the ways is to use different methods to implement surface modification treatment on organic pigments, such as adding the second diazo component or coupling component (US 4,643,770, 4,468,525), surfactants with different characteristics (US 5,662,739 ), so that the surface properties of the pigment conform to the characteristics of the practical medium; another approach is to adjust the formulation components of the final product (such as solvent type and content) and add specific multifunctional additives (US 4,762,568; US4,812,517), Make the final co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/00C09B67/46C09D11/02C09K23/00C09D11/00
Inventor 蔡永奎董志军潘大伟陆大年
Owner DONGHUA UNIV
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