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Antifouling coating composition, antifouling coating film formed using the composition, coated article having the coating film on the surface, and antifouling treatment method to form the coating film

A technology of antifouling coatings and compositions, applied in the direction of antifouling/underwater coatings, thin material treatment, rosin coatings, etc., which can solve the problems of insufficient prevention of mucus adhesion, increase of frictional resistance of ships, waste of fuel costs, etc., and achieve maintenance Antifouling effect, stable dissolution rate, high environmental safety effect

Active Publication Date: 2011-08-31
NITTO KASEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the antifouling coating film formed by using the antifouling paint containing the zinc salt or the copper salt is immersed in seawater for a long period of time, coating film defects such as capillary cracks (fine cracks) will appear, and as a result Will reduce antifouling performance
Moreover, if the above-mentioned zinc salt or the above-mentioned copper salt is used, although the adhesion of larger fouling organisms of animals or plants can be prevented, the adhesion of mucus cannot be sufficiently prevented.
If slime accumulates on the antifouling coating, for example, it will increase the frictional resistance of the ship, which will waste fuel costs during sailing

Method used

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  • Antifouling coating composition, antifouling coating film formed using the composition, coated article having the coating film on the surface, and antifouling treatment method to form the coating film
  • Antifouling coating composition, antifouling coating film formed using the composition, coated article having the coating film on the surface, and antifouling treatment method to form the coating film
  • Antifouling coating composition, antifouling coating film formed using the composition, coated article having the coating film on the surface, and antifouling treatment method to form the coating film

Examples

Experimental program
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preparation example Construction

[0147]

[0148] The antifouling paint composition of the present invention can be known by mixing the copolymer (A), the modified rosin salt (B) in a solvent, and if necessary, the cuprous oxide and the plasticizer. additives are prepared.

[0149] The usage amount of the copolymer (A), the modified rosin salt (B) and the like can be appropriately adjusted so that the contents of these substances respectively reach the modified values ​​described in the antifouling coating composition item. Rosin salt (B) content.

[0150] Usable solvents include, for example, xylene, toluene, mineral spirits, MIBK, butyl acetate, and the like. Among them, xylene is particularly preferred. These solvents may be used alone or in combination of two or more.

[0151] When mixing, various materials such as the copolymer (A) may be dissolved and dispersed in a solvent in advance. or preferably performed. For example, the copolymer (A) and the modified rosin salt (B) may be mixed with other m...

Embodiment

[0174] The features of the present invention are clearly described below with reference to Examples. Of course, the present invention is not limited to this embodiment.

[0175] "%" in each of the following preparation examples, comparative preparation examples, examples, and comparative examples means "% by weight". The viscosity is a value measured at 25°C, and is a value measured with a Brookfield rotational viscometer (B-type viscometer). The weight average molecular weight (Mw) is a value obtained by GPC (polystyrene conversion value). The conditions for GPC are as follows:

[0176] Device---HLC-8220GPC, manufactured by Tosoh Corporation

[0177] Column---T SKgel SuperHZM-M (manufactured by Tosoh Corporation) 2 pieces

[0178] Flow---0.35mL / min

[0179] Detector---RI

[0180] Column thermostat temperature---40℃

[0181] Eluent---THF

[0182] The non-volatile content is a value obtained by heating at 110° C. for 3 hours.

[0183] The unit of the compounding quanti...

preparation example 1

[0184] Preparation example 1 (preparation of copolymer solution A-1)

[0185] Put 230g of xylene into a 1000ml flask equipped with a thermometer, a reflux cooler, a stirrer and a dropping funnel, then stir at 100±2°C in nitrogen, while adding 270g of triisopropyltriisopropylmethacrylate A mixture of propylsilyl ester, 50g methoxyethyl methacrylate, 30g methyl methacrylate, 20g ethyl acrylate and 4g (initial addition) tert-butyl peroxy-2-ethyl hexanoate was passed through Dropped into the flask for 1 hour. After dropping, polymerization reaction was performed at 100±2° C. for 2 hours. Afterwards, stir at 100±2°C, and add 1 g of ethyl tert-butylperoxy-2-hexanoate every 2 hours, add three times in total, add 270 g of xylene after the polymerization reaction and dissolve it, Thus, a triorganosilyl ester-containing copolymer solution A-1 was prepared. Table 1 shows the viscosity, non-volatile matter content, Mw and Tg of A-1.

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Abstract

Provided is a composition for forming an antifouling coating film having high environmental safety with which hairline cracks or other coating film abnormalities will not easily occur and whereby adhesion of slime is also prevented or limited, even with immersion in seawater over a long time. The antifouling coating composition comprises (A) a triorganosilyl ester-containing copolymer obtained from a mixture of (a) a methacrylic acid triorganosilyl ester monomer represented by general formula (1): (in the formula, R1 represents a hydrogen atom or a methyl group, R2, R3 and R4 may be the same or different and represent a C3-6 alfa-branched alkyl group or phenyl group) and (b) an ethylenic unsaturated monomer that is copolymerizable with the methacrylic acid triorganosilyl ester monomer, and (B) a modified rosin salt that is a salt of zinc and / or copper and a modified rosin containing at least 80 wt% of two or more types selected from dihydroabietic acid, tetrahydroabietic acid, dehydroabietic acid, pimaric acid, isopimaric acid and dihydropimaric acid.

Description

technical field [0001] The present invention relates to an antifouling coating composition, an antifouling coating film formed from the composition, a coated object having the coating film on its surface, and an antifouling treatment method by forming the coating film. Background technique [0002] Currently, triorganosilyl group-containing copolymers having low toxicity and a small burden on the environment have been developed and used as antifouling paints. [0003] When using a copolymer containing a tri-n-butylsilyl copolymer and the like in which the alkyl group is a straight-chain silicon-based ester monomer copolymerized as the triorganosilyl ester-containing copolymer, the hydrolysis of the coating film The speed is very fast and the water resistance is poor, so it is difficult to control the dissolution rate of the coating film. Therefore, the copolymerization of isopropyl, tert-butyl and other alkyl-branched triorganosilyl ester-containing monomers has been studie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/16C09D143/04C09D193/04
CPCC09D5/1612C09D193/04C08L93/00C08L93/04C09D143/04C08L43/04C09D5/1662C08F20/10Y10T428/31663C08L2666/26C09D4/00C09D5/16C09D133/04
Inventor 毛利喜代美和久英典藤本贵义南野智史
Owner NITTO KASEI CO LTD
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