Filler dispersant for alcohol-soluble ink and preparation method thereof

Abstract

The application belongs to the field of auxiliary agents, and particularly relates to a filler dispersant matched with alcohol-soluble ink and a preparation method thereof. The preparation method is as follows: polyether and phosphide are mixed to obtain a premix; the premix is heated, and then an acidifying agent is added to react to obtain a reaction product; the reaction product is sequentially cooled, filtered, discharged and packaged. The polyether, the phosphide and the acidifying agent are used to prepare the dispersant under strict operation conditions, the high-level dispersion and viscosity reduction ability of the alcohol-soluble ink when simultaneously using organic and inorganic fillers are improved, the dispersant is used for solvent type, solvent-free coating and printing ink, can stabilize the organic and inorganic fillers, especially titanium dioxide and silicon dioxide, can significantly reduce the viscosity of the grinding material, and increase the wetting and stability, and great convenience is provided and the cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of additives, specifically relating to a filler dispersant for alcohol-soluble inks and its preparation method. Background Technology

[0002] Alcohol-soluble inks have a wide range of applications, and the dispersants used need to be able to efficiently disperse and reduce the viscosity of organic and inorganic fillers. However, existing products have poor dispersion and application performance for organic and inorganic fillers.

[0003] Therefore, based on this, the technical solution of the present invention is proposed. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a method for preparing a filler dispersant for alcohol-soluble inks, the preparation method comprising the following steps:

[0005] (1) The polyether and phosphide are mixed to obtain a premix;

[0006] (2) The premix is ​​heated and then an acidifying agent is added to react and a reactant is obtained;

[0007] (3) The reactants are cooled, filtered, discharged and packaged in sequence to obtain the filler dispersant for the alcohol-soluble ink.

[0008] Preferably, in step (1), the polyether is polyether PM10T, which is a polyethylene glycol propylene glycol monomethyl ether, wherein the ratio of ethylene glycol to propylene glycol is 10 to 25 and the total molecular weight is 1000 to 1500.

[0009] Preferably, in step (1), the phosphide is phosphorus pentoxide.

[0010] Preferably, in step (1), the mixing temperature is 20-25°C.

[0011] Preferably, in step (2), the temperature is raised to 70-74°C.

[0012] Preferably, in step (2), the reaction time is 4 to 5 hours.

[0013] Preferably, in step (2), the acidifying agent is dilute nitric acid; the mass concentration of the dilute nitric acid is 10-20%.

[0014] Preferably, in step (3), the temperature is reduced to below 60°C.

[0015] Preferably, the amount of polyether is 1700-2000 parts by weight, the amount of phosphide is 90-140 parts by weight, and the amount of acidifier is 13-40 parts by weight.

[0016] Based on the same technical concept, another aspect of the present invention is to provide a filler dispersant for alcohol-soluble inks prepared by the above-described method.

[0017] The beneficial effects of this invention are as follows:

[0018] This invention uses polyether, phosphide, and acidifier to prepare a dispersant under strict operating conditions, which improves the ability of alcohol-soluble inks to achieve high-level dispersion and viscosity reduction when using both organic and inorganic fillers. It is used as a wetting and dispersing agent for solvent-based and solvent-free coatings and printing inks, and can stabilize organic and inorganic fillers, especially titanium dioxide and silicon dioxide. It can significantly reduce the viscosity of abrasives and increase wetting and stability, providing great convenience and reducing costs. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] Example 1

[0021] This embodiment provides a method for preparing a filler dispersant for alcohol-soluble inks, the preparation method comprising the following steps:

[0022] (1) Add 1900g of polyether PM10T to a three-necked flask, maintain the reaction temperature at 20℃, and then add 110g of phosphorus pentoxide to obtain a premix.

[0023] (2) The premix was heated to 70°C, and then 40g of 10% dilute nitric acid was added. The mixture was reacted for 4 hours to obtain the reactant.

[0024] (3) Cool the reactants to 55°C, then filter, discharge and package them in sequence to obtain the filler dispersant for the alcohol-soluble ink.

[0025] Example 2

[0026] This embodiment provides a method for preparing a filler dispersant for alcohol-soluble inks, the preparation method comprising the following steps:

[0027] (1) Add 1800g of polyether PM10T to a three-necked flask, maintain the reaction temperature at 25℃, and then add 100g of phosphorus pentoxide to obtain a premix.

[0028] (2) The premix was heated to 74°C, and then 10g of 10% dilute nitric acid was added. The mixture was reacted for 5 hours to obtain the reactant.

[0029] (3) Cool the reactants to 60°C, then filter, discharge and package them in sequence to obtain the filler dispersant for the alcohol-soluble ink.

[0030] Example 3

[0031] This embodiment provides a method for preparing a filler dispersant for alcohol-soluble inks, the preparation method comprising the following steps:

[0032] (1) Add 1750g of polyether PM10T to a three-necked flask, maintain the reaction temperature at 23℃, and then add 90g of phosphorus pentoxide to obtain a premix.

[0033] (2) The premix was heated to 72°C, and then 25g of 20% dilute nitric acid was added. The mixture was reacted for 4.5h to obtain the reactant.

[0034] (3) Cool the reactants to 50°C, then filter, discharge and package them in sequence to obtain the filler dispersant for the alcohol-soluble ink.

[0035] Example 4

[0036] This embodiment provides a method for preparing a filler dispersant for alcohol-soluble inks, the preparation method comprising the following steps:

[0037] (1) Add 2000g of polyether PM10T to a three-necked flask, maintain the reaction temperature at 20℃, and then add 140g of phosphorus pentoxide to obtain a premix.

[0038] (2) The premix was heated to 70°C, and then 25g of 15% dilute nitric acid was added. The mixture was reacted for 5 hours to obtain the reactant.

[0039] (3) Cool the reactants to 53°C, then filter, discharge and package them in sequence to obtain the filler dispersant for the alcohol-soluble ink.

[0040] Example 5

[0041] This embodiment provides a method for preparing a filler dispersant for alcohol-soluble inks, the preparation method comprising the following steps:

[0042] (1) Add 1700g of polyether PM10T to a three-necked flask, maintain the reaction temperature at 22℃, and then add 110g of phosphorus pentoxide to obtain a premix.

[0043] (2) The premix was heated to 71°C, and then 13g of 10% dilute nitric acid was added. The mixture was reacted for 4 hours to obtain the reactant.

[0044] (3) Cool the reactants to 50°C, then filter, discharge and package them in sequence to obtain the filler dispersant for the alcohol-soluble ink.

[0045] Comparison and verification examples

[0046] The filler dispersant obtained in Example 1 of this invention was selected and compared with commercially available domestic filler dispersants and commercially available imported filler dispersants. The results are shown in Table 1.

[0047] Table 1

[0048]

[0049] Note: There are four levels in total, with A being the best, B being the second best, C being the third best, and D being the worst.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for preparing a filler dispersant for alcohol-soluble inks, characterized in that, The preparation method includes the following steps: (1) The polyether and phosphide are mixed to obtain a premix; wherein: The polyether is a polyethylene glycol-propylene glycol monomethyl ether, wherein the ratio of ethylene glycol to propylene glycol is 10-25, and the total molecular weight is 1000-1500; the phosphide is phosphorus pentoxide; and the mixing temperature is 20-25°C. (2) The premix is ​​heated, and then an acidifying agent is added to react and a reactant is obtained; wherein: The temperature is raised to 70-74℃; the reaction time is 4-5 hours; the acidifying agent is dilute nitric acid; the mass concentration of the dilute nitric acid is 10-20%. (3) The reactants are sequentially cooled, filtered, discharged, and packaged to obtain the filler dispersant for the alcohol-soluble ink; wherein: The temperature was lowered to below 60°C; The amount of polyether used is 1700~2000 parts by weight, the amount of phosphide used is 90~140 parts by weight, and the amount of acidifier used is 13~40 parts by weight.

2. The filler dispersant for the alcohol-soluble ink obtained by the preparation method of claim 1.

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