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Styrene maleic amic acid copolymer and preparation method thereof

A technology of maleamic acid and styrene, applied in the direction of pigment slurry, etc., can solve the problems of VOC rise and failure to eliminate, and achieve the effect of good water solubility

Active Publication Date: 2020-07-10
嘉兴华雯化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods will lead to an increase in VOC, which is contrary to the original intention of the water-soluble formula
And it just dilutes the ammonium carboxylate, and does not achieve the effect of eliminating

Method used

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preparation example Construction

[0023] In order to solve the problems of the technologies described above, the first aspect of the present invention provides a kind of preparation method of styrene maleamic acid copolymer, at least comprise the following steps:

[0024] (1) preparation of maleamic acid;

[0025] (2) preparation of styrene maleamic acid copolymer;

[0026] (3) Purification treatment.

[0027] In a preferred embodiment, the raw materials for the preparation of the styrene-maleamic acid copolymer include styrene, alkylamine and maleic anhydride.

[0028] In a more preferred embodiment, by weight percentage, the preparation raw material of described styrene-maleamic acid copolymer also includes 30-80% solvent, 0.1-2% initiator, 0.5-5% molecular weight regulator , Styrene, alkylamine and maleic anhydride make up the balance.

[0029] In a more preferred embodiment, by weight percentage, the preparation raw material of described styrene-maleamic acid copolymer also includes 60% solvent, 1% init...

Embodiment 1

[0067] Embodiment 1 of the present invention provides a kind of styrene maleamic acid copolymer, and its preparation method comprises the following steps:

[0068] (1) Preparation of maleamic acid: Dissolve maleic anhydride in a solvent, stir and mix evenly, control the temperature in an ice-water bath at 0°C, slowly add alkylamine dropwise while stirring, and stir for 3 hours after the dropwise addition;

[0069] (2) Preparation of styrene-maleamic acid copolymer: heat up the solution after the reaction in step (1) to 110°C, add the mixed solution of initiator, molecular weight regulator, and styrene while stirring, and react for 3 hours to obtain the polymer solution;

[0070] (2) Purification treatment: the polymer solution in step (2) is lowered to room temperature, the polymer solution is precipitated with alcohols, dried and dried.

[0071] The alkylamine is monomethylamine; the molar ratio of styrene, alkylamine and maleic anhydride is 1:1:1; by weight percentage, the ...

Embodiment 2

[0074] Embodiment 2 of the present invention provides a kind of styrene-maleamic acid copolymer, and its preparation method is the same as embodiment 1.

[0075] The alkylamine is monomethylamine; the molar ratio of styrene, alkylamine and maleic anhydride is 1:0.5:1; by weight percentage, the amount of the solvent is 60%, and the amount of the initiator is 1% , the amount of molecular weight regulator is 2%, and styrene, alkylamine and maleic anhydride make up the balance.

[0076] The solvent is toluene; the initiator is azobisisobutylcyanide; the molecular weight regulator is α-methylstyrene dimer; and the alcohol is ethanol.

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Abstract

The invention relates to the technical field of synthesis of high polymer material auxiliaries, and particularly provides a preparation method of a styrene maleic amic acid copolymer. The preparationmethod of the styrene maleic amic acid copolymer at least comprises the following steps: (1) preparing maleic amic acid; (2) preparing the styrene maleic amic acid copolymer; and (3) performing purification treatment. Therefore, the copolymer which is good in water solubility and does not react with metal can be prepared, and the copolymer is particularly suitable for being used as a dispersing agent of water-soluble metal pigment.

Description

technical field [0001] The invention relates to the technical field of polymer material additive synthesis, and more specifically, the invention provides a styrene-maleamic acid copolymer and a preparation method thereof. Background technique [0002] Metallic pigments are metals or metal alloys that are ground into powder or flake form. Although metallic pigments have special appearance, color and luster, compared with ordinary organic pigments, metallic pigments are prone to discoloration due to chemical reactions such as oxidation during use, and there is a problem of unstable dispersion and easy sedimentation. At present, acrylic acid copolymer is a commonly used water-soluble resin dispersant. Its high acid value can react with ammonium hydroxide to form ammonium carboxylate salt and dissolve in water, which can bring about complete dissolution, limited self-polymerization deposition, and particle size. The effect of small and clear appearance. These solutions have go...

Claims

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Application Information

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IPC IPC(8): C08F222/38C08F212/08C09D17/00
CPCC08F212/08C08F222/38C09D17/006
Inventor 李昌鸿曾王杰王桂然
Owner 嘉兴华雯化工股份有限公司
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