Preparation method of coating dispersing agent and coating dispersing agent

Abstract

The invention provides a preparation method of a coating dispersant and the coating dispersant prepared by the method. The preparation method comprises the following steps: synthesizing polyether alcohol and a cyclic monomer into polyether under the action of a catalyst; reacting the polyether with an acid substance under the action of a reducing agent, an initiator and a chain transfer agent to prepare a polyether dispersant; and adding a neutralizer into the polyether dispersant to prepare the coating dispersant, wherein on the basis that the total amount of the raw materials is 1000 parts by mass, the use amounts of the raw materials are as follows: 79.29 to 83.57 parts by mass of the polyether alcohol ether, 160.97 to 169.68 parts by mass of the cyclic monomer, 0.7 to 1.9 parts by mass of the catalyst, 129.74 to 136.75 parts by mass of the acid substance, 2.1 to 4.5 parts by mass of the reducing agent, 3.9 to 6.7 parts by mass of the initiator, 0.6 to 3.0 parts by mass of the chain transfer agent, 7.1 to 12.8 parts by mass of the neutralizing agent and the balance of water; the polyether alcohol head is trans-4, 4-dimethoxy-2-butenol, the cyclic monomer is ethylene oxide and propylene oxide, and the acid substance is acrylic acid.

Description

technical field

[0001] The invention relates to a preparation method of a paint dispersant and a paint dispersant prepared by the method. Background technique

[0002] Paint not only protects the value of the coated object, but also plays a very good decorative role due to its rich colors. Nowadays, with the continuous improvement of people's awareness of environmental protection, the development of water-based coatings has been vigorously advocated. The solid components in coatings such as pigments and fillers occupy an important part, and their dispersion stability in the water-based system determines the quality of the coating. It is difficult to achieve the optimal dispersion and stabilization effect only by means of mechanical shearing force, because during the mechanical crushing process, the smaller the particle size of the solid particles, the larger the interface area between them and the liquid medium. From a thermodynamic point of view, the stronger the driving ...

Examples

preparation example Construction

[0018] The invention provides a kind of preparation method of paint dispersant, it is characterized in that, the method comprises:

[0019] Synthesize polyether alcohol head and cyclic monomer into polyether under the action of catalyst;

[0020] making the polyether react with an acid substance under the action of a reducing agent, an initiator, and a chain transfer agent to prepare a polyether dispersant; and

[0021] Add neutralizing agent in described polyether dispersant, make coating dispersant,

[0022] Based on the total amount of raw materials being 1000 parts by mass, the amount of each raw material is: 79.29-83.57 parts by mass of polyether alcohol head, 160.97-169.68 parts by mass of cyclic monomer, 0.7-1.9 parts by mass of catalyst, and 129.74-136.75 parts by mass of acid substances parts, 2.1-4.5 parts by mass of reducing agent, 3.9-6.7 parts by mass of initiator, 0.6-3.0 parts by mass of chain transfer agent, 7.1-12.8 parts by mass of neutralizing agent, and th...

Embodiment 1

[0043] Example 1 is used to illustrate the preparation method of the paint dispersant of the present invention and the paint dispersant prepared by the method.

[0044] The paint dispersant of this embodiment is polymerized by the following components, and the total mass of raw materials is 1000 parts, and the consumption of each component is as follows:

[0045] 80.74 parts of trans-4,4-dimethoxy-2-butenol

[0046] Ethylene oxide 112.45 parts

[0047] Propylene oxide 49.15 parts

[0048] 0.8 parts of a composition of arylsulfonic acid and aluminum phenate with a mass ratio of 1:3

[0049] Acrylic acid 131.25 parts

[0050] 2.6 parts of the composition of sodium bisulfite and sodium metabisulfite with a mass ratio of 3:2

[0051] 6.5 parts of the composition of ammonium persulfate and benzoyl peroxide with a mass ratio of 1:1

[0052] 1.5 parts of the composition of mercaptopropionic acid and mercaptoethanol with a mass ratio of 2:3

[0053] Mass ratio is 8.9 parts of th...

Embodiment 2-6

[0060] Examples 2-6 are used to illustrate the preparation method of the paint dispersant of the present invention and the paint dispersant prepared by this method.

[0061] In this example, except that the components and amounts of the raw materials are as shown in Table 1, and the parameters in the steps are as shown in Table 2, the same method as in Example 1 is used to prepare the samples of Examples 2-6. Paint dispersant.

technical field

[0001] The invention relates to a preparation method of a paint dispersant and a paint dispersant prepared by the method. Background technique

[0002] Paint not only protects the value of the coated object, but also plays a very good decorative role due to its rich colors. Nowadays, with the continuous improvement of people's awareness of environmental protection, the development of water-based coatings has been vigorously advocated. The solid components in coatings such as pigments and fillers occupy an important part, and their dispersion stability in the water-based system determines the quality of the coating. It is difficult to achieve the optimal dispersion and stabilization effect only by means of mechanical shearing force, because during the mechanical crushing process, the smaller the particle size of the solid particles, the larger the interface area between them and the liquid medium. From a thermodynamic point of view, the stronger the driving ...

Examples

preparation example Construction

[0018] The invention provides a kind of preparation method of paint dispersant, it is characterized in that, the method comprises:

[0019] Synthesize polyether alcohol head and cyclic monomer into polyether under the action of catalyst;

[0020] making the polyether react with an acid substance under the action of a reducing agent, an initiator, and a chain transfer agent to prepare a polyether dispersant; and

[0021] Add neutralizing agent in described polyether dispersant, make coating dispersant,

[0022] Based on the total amount of raw materials being 1000 parts by mass, the amount of each raw material is: 79.29-83.57 parts by mass of polyether alcohol head, 160.97-169.68 parts by mass of cyclic monomer, 0.7-1.9 parts by mass of catalyst, and 129.74-136.75 parts by mass of acid substances parts, 2.1-4.5 parts by mass of reducing agent, 3.9-6.7 parts by mass of initiator, 0.6-3.0 parts by mass of chain transfer agent, 7.1-12.8 parts by mass of neutralizing agent, and th...

Embodiment 1

[0043] Example 1 is used to illustrate the preparation method of the paint dispersant of the present invention and the paint dispersant prepared by the method.

[0044] The paint dispersant of this embodiment is polymerized by the following components, and the total mass of raw materials is 1000 parts, and the consumption of each component is as follows:

[0045] 80.74 parts of trans-4,4-dimethoxy-2-butenol

[0046] Ethylene oxide 112.45 parts

[0047] Propylene oxide 49.15 parts

[0048] 0.8 parts of a composition of arylsulfonic acid and aluminum phenate with a mass ratio of 1:3

[0049] Acrylic acid 131.25 parts

[0050] 2.6 parts of the composition of sodium bisulfite and sodium metabisulfite with a mass ratio of 3:2

[0051] 6.5 parts of the composition of ammonium persulfate and benzoyl peroxide with a mass ratio of 1:1

[0052] 1.5 parts of the composition of mercaptopropionic acid and mercaptoethanol with a mass ratio of 2:3

[0053] Mass ratio is 8.9 parts of th...

Embodiment 2-6

[0060] Examples 2-6 are used to illustrate the preparation method of the paint dispersant of the present invention and the paint dispersant prepared by this method.

[0061] In this example, except that the components and amounts of the raw materials are as shown in Table 1, and the parameters in the steps are as shown in Table 2, the same method as in Example 1 is used to prepare the samples of Examples 2-6. Paint dispersant.

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