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Method for producing resin dispersion for antifouling coating

An antifouling paint and a manufacturing method technology, applied in antifouling/underwater paints, coatings, paints containing biocides, etc. Excellent water resistance

Active Publication Date: 2012-09-19
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the surface of the coating film becomes uneven, and the effect of preventing the adhesion of organisms such as marine organisms is significantly reduced.

Method used

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  • Method for producing resin dispersion for antifouling coating
  • Method for producing resin dispersion for antifouling coating
  • Method for producing resin dispersion for antifouling coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0087] Hereinafter, although an Example and a comparative example demonstrate this invention in more detail, this invention is not limited at all by these examples. In addition, the part in an Example shows a mass part. The evaluation of the resin dispersion for antifouling paints prepared in this example was performed by the method shown below.

[0088] [Evaluation of storage stability]

[0089] In the evaluation of the storage stability of the resin dispersion for antifouling paint, the resin dispersion for antifouling paint was stored at a temperature of 40°C for 3 days, 10 days, and 1 month, and the presence or absence of sediment was checked visually . Evaluation was performed using the following criteria.

[0090] ○: Resin components do not precipitate, do not separate, and do not form coagulums after the specified time has elapsed

[0091] △: There is a small amount of sediment, but it is dispersed by stirring

[0092] ×: The resin component precipitates, separates...

manufacture example M1

[0108] 66.3 parts of MFDG (dipropylene glycol monomethyl ether) and 41 parts of zinc oxide (ZnO) were added to the reaction container equipped with a stirrer, a temperature regulator, and a dripping device, and it heated up to 75 degreeC, stirring. A mixture consisting of 43 parts of methacrylic acid (MAA), 36 parts of acrylic acid (AA) and 5 parts of water was added dropwise thereto at a constant speed over 3 hours. After the dropwise addition, the reaction solution changed from milky white to transparent. Furthermore, after stirring for 2 hours, 10 parts of MFDG were added, and the transparent divalent metal containing ethylenically unsaturated monomer mixture M1 was obtained. Table 1 shows the addition amount of each raw material, the metal content and solid content concentration of the obtained divalent metal-containing ethylenically unsaturated monomer mixture M1.

manufacture example M2、M3

[0110] Divalent metal-containing ethylenically unsaturated monomer mixtures M2 and M3 were produced in the amounts shown in Table 1 in the same manner as in Production Example M1. However, instead of MFDG, PKA5001 was used in Production Example M2, and AG was used in Production Example M3.

[0111] [Table 1]

[0112]

[0113] [Manufacturing example P1]

[0114] 25.9 parts of MFDG (dipropylene glycol monomethyl ether) were put into the reaction container equipped with the stirrer, temperature regulator, and dripping apparatus, and it heated up to 130 degreeC, stirring.

[0115]

[0116] Thereafter, a mixture composed of the following raw materials was added dropwise at a constant rate over 1 hour, and then a copolymerization reaction was performed for 0.5 hour (hereinafter, this reaction step is referred to as step 1).

[0117] Acrylic acid (AA) 1 part

[0118] 14 parts of ethyl acrylate (EA)

[0119] 0.5 parts of chain transfer agent (trade name: "Nofmer MSD", manufactu...

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Abstract

The disclosed resin dispersion for an antifouling coating has excellent water resistance in sea water and storage stability, can display an antifouling effect over the long term, and has self-polishing properties with excellent adhesiveness. The method for producing the resin dispersion for an antifouling coating includes a step for producing a polymer (A) containing a bivalent metal and a step for dispersing said polymer (A) in a dispersion medium comprising water or a mixture of water and an organic solvent, and is characterized by the polymer (A) containing a bivalent metal being obtained through multi-stage (at least two stages) solution polymerization of: 1-40 mass % of a bivalent-metal-containing ethylenic unsaturated monomer unit (a1), 0-8 mass % of a carboxyl-group-containing ethylenic unsaturated monomer unit (a2), 0-40 mass % of a hydroxyl-group-containing ethylenic unsaturated monomer unit (a3), and 99-22 mass % of another ethylenic unsaturated monomer unit (a4).

Description

technical field [0001] The present invention relates to a method for producing a resin dispersion for antifouling paint using a water-dispersed metal-containing resin. More specifically, it relates to a method for producing a resin dispersion for antifouling paint capable of forming a coating film that prevents marine organisms and seaweed from adhering to underwater structures, fishing nets, and ship bottoms. Background technique [0002] The coating film formed by the antifouling paint exhibits an antifouling effect when the antifouling agent contained therein dissolves in the sea. When a coating film formed of a disintegrating antifouling paint using a rosin-based compound is immersed in the sea for a long time, the eluted components gradually decrease and the insoluble components increase. Therefore, the surface of the coating film becomes uneven, and the effect of preventing adhesion of living things such as marine organisms is remarkably reduced. [0003] On the othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/16C09D5/02C09D133/00C09D151/06C09D157/06C09D157/10
CPCC09D5/022C09D5/1637C08F220/06C09D5/1668C09D151/08C09D133/08C09D5/16C08F220/18C09D133/064C08F220/1802C08F220/1804C08F220/14
Inventor 岩本晓生田沼尚美
Owner MITSUBISHI CHEM CORP
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