A kind of aqueous dispersant containing phosphoric acid group and its preparation method and application

A phosphoric acid-based water-based and dispersant technology, which is applied in applications, household utensils, inks, etc., to achieve the effects of improving compatibility, improving dispersion stability, grinding efficiency, and improving anti-sedimentation performance

Active Publication Date: 2022-01-18
广东宝采智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Preparation of ceramic powder suspension in aqueous medium, although it can meet people's expectations in terms of safety and environment, but because water is a polar protic solvent, it has significant hydrogen bonds, capillary forces and high surface tension. Make water form a strong liquid bridge when dispersing the powder, making the ceramic powder form a serious tendency to agglomerate in the water phase

Method used

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  • A kind of aqueous dispersant containing phosphoric acid group and its preparation method and application
  • A kind of aqueous dispersant containing phosphoric acid group and its preparation method and application
  • A kind of aqueous dispersant containing phosphoric acid group and its preparation method and application

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preparation example Construction

[0051] Preparation of Waterborne Dispersant Containing Phosphoric Acid

[0052] According to the parameters such as raw material composition and proportion in Table 2, a phosphoric acid-based aqueous dispersant was prepared.

[0053] The embodiment (unit: g) of table 2 aqueous dispersants

[0054]

Embodiment 1

[0056] S1. Ethyl methacrylate, tert-butyl methacrylate, hydroxyethyl acrylate, PEI-1 and 50 g of butyl acetate were uniformly mixed to obtain a mixed monomer.

[0057] S2. Add 300g of butyl acetate to the reaction kettle, add the mixed monomer obtained in step S1, raise the temperature to 70°C under a nitrogen atmosphere, add azobisisobutyronitrile and 1,1-diphenylethylene to react, and react for 5h. Intermediate 1 was obtained.

[0058] S3. Add 300g of dioxane to the reaction kettle, add intermediate 1 obtained in step S2, add triethylamine, stir for 2-3h; add 2-chloro-2-oxo-1,3,2-dioxaphospholane Alkanes, stirred at 70 ° C for 2d, and reacted to obtain intermediate 2.

[0059] S4. Add 300 mL of prepared hydrochloric acid solution (37% hydrochloric acid: dioxane: water = 3: 1: 1, v: v: v) into the reaction kettle, add intermediate 2 obtained in step S3, heat up to 80 ° C, and react for 5 h , to obtain a phosphoric acid-based aqueous dispersant.

Embodiment 2

[0061] S1. Ethyl methacrylate, tert-butyl methacrylate, hydroxyethyl acrylate, PEI-1 and 50 g of butyl acetate were uniformly mixed to obtain a mixed monomer.

[0062] S2. Add 300g of butyl acetate to the reaction kettle, add the mixed monomer obtained in step S1, raise the temperature to 70°C under a nitrogen atmosphere, add azobisisobutyronitrile and 1,1-diphenylethylene to react, and react for 5h. Intermediate 1 was obtained.

[0063] S3. Add 300g of dioxane to the reaction kettle, add intermediate 1 obtained in step S2, add triethylamine, stir for 2-3h; add 5,5-dimethyl-2-chloro-1,3,2-diox Phosphacaprolactoyl phosphate, stirred at 70°C for 2d, reacted to obtain intermediate 2.

[0064] S4. Add 300 mL of prepared hydrochloric acid solution (37% hydrochloric acid: dioxane: water = 3: 1: 1, v: v: v) into the reaction kettle, add intermediate 2 obtained in step S3, heat up to 80 ° C, and react for 5 h , to obtain a phosphoric acid-based aqueous dispersant.

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Abstract

The invention discloses a phosphoric acid group-containing aqueous dispersant and its preparation method and application. The raw materials for the preparation of the phosphoric acid group-containing aqueous dispersant include: acrylate monomers, triamines, and cyclic chlorophosphate esters. The acrylic acid The ester monomer includes at least t-butyl group-containing acrylate and hydroxyl group-containing acrylate. The dispersant of the present invention not only introduces a phosphoric acid group, improves the compatibility of the dispersant with water, reduces the interfacial surface tension, but also makes the dispersant Contains a large amount of carboxylate anions. Compared with the anchoring effect of ester groups, better anchoring effect can be formed between carboxylate anions and inorganic particles, which is beneficial to improve dispersion stability and grinding efficiency. The water-based dispersant is suitable for dispersing ceramic glaze inks, and improves the anti-sedimentation performance and grinding efficiency of the ceramic inks.

Description

technical field [0001] The invention relates to the technical field of dispersants, in particular to a phosphoric acid group-containing aqueous dispersant and its preparation method and application. Background technique [0002] Traditional ceramic inks are usually dispersed in non-aqueous media. Due to the environmental protection problems of organic solvents, the ink industry is forced to reduce the use of volatile organic solvents, and gradually seek the technology of using aqueous media for dispersion. Preparation of ceramic powder suspension in aqueous medium, although it can meet people's expectations in terms of safety and environment, but because water is a polar protic solvent, it has significant hydrogen bonds, capillary forces and high surface tension. Make the water form a strong liquid bridge when dispersing the powder, and make the ceramic powder form a serious tendency to agglomerate in the water phase. Therefore, the development of more efficient water-based...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F220/18C08F220/20C08F212/32C08F8/40C09D11/03
CPCC08F283/00C08F8/40C09D11/03C08F220/1802C08F220/1808C08F220/20C08F212/32
Inventor 王小妹夏李静伍雪芬
Owner 广东宝采智能科技有限公司
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