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Coating composition for use in ship with reduced friction drag utilizing gas-lubricating function in water, coating film formed from said composition, ship coated with said coating film, method for manufacturing said ship, method for predicting said friction drag reduction effect, device used for prediction of said friction drag reduction effect, and friction drag reduction system for use in said ship with reduced friction drag

A technology of frictional resistance and gas lubrication applied to a coating composition for reducing frictional resistance of a ship utilizing the gas lubrication function in water, a coating film formed from the composition, a ship coated with the coating film, and manufacture of the ship , the field of predicting the above-mentioned frictional resistance reduction effect, a device for predicting the above-mentioned frictional resistance reduction effect, and a frictional resistance reduction system for the above-mentioned frictional resistance reduction ship, capable of solving problems such as lack of practicality and marine pollution in the atmosphere, Achieve the effects of reducing frictional resistance of water flow, preventing adhesion of aquatic organisms, and excellent frictional resistance

Active Publication Date: 2015-08-19
CHUGOKU MARINE PAINTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Document 5 describes that in order to impart antifouling properties to the uneven surface, oxidizing gas or oxidizing liquid is supplied into the sea in such a manner that these gases or liquids flow on the bottom of the ship, but it is difficult to keep the entire bottom surface of the ship in this atmosphere all the time. , and lack of practicability due to concerns about marine pollution caused by oxidizing gases or oxidizing liquids
[0007] Therefore, the above-mentioned prior art cannot be considered effective as a frictional resistance reduction method for ships that have been used for a long time
[0008] In addition, as described in Patent Document 6, a method of judging the effect of reducing frictional resistance by the contact angle of water on the film surface is known, but such a method cannot be said to reflect the effect of the coating film surface in water with good accuracy. The state or behavior of the bubble, etc.

Method used

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  • Coating composition for use in ship with reduced friction drag utilizing gas-lubricating function in water, coating film formed from said composition, ship coated with said coating film, method for manufacturing said ship, method for predicting said friction drag reduction effect, device used for prediction of said friction drag reduction effect, and friction drag reduction system for use in said ship with reduced friction drag
  • Coating composition for use in ship with reduced friction drag utilizing gas-lubricating function in water, coating film formed from said composition, ship coated with said coating film, method for manufacturing said ship, method for predicting said friction drag reduction effect, device used for prediction of said friction drag reduction effect, and friction drag reduction system for use in said ship with reduced friction drag
  • Coating composition for use in ship with reduced friction drag utilizing gas-lubricating function in water, coating film formed from said composition, ship coated with said coating film, method for manufacturing said ship, method for predicting said friction drag reduction effect, device used for prediction of said friction drag reduction effect, and friction drag reduction system for use in said ship with reduced friction drag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0359] Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. In addition, unless otherwise specified, the pressure condition is normal pressure (about 0.1013 MPa), and the temperature condition is normal temperature (about 25° C.).

[0360] Details of various tests performed in each of the following Examples and Comparative Examples are as follows.

[0361]

[0362] According to JIS B 0601, the surface state of each coating film was measured using a stylus surface roughness meter (HANDYSURF E-35A, manufactured by Tokyo Precision Co., Ltd. (Tokyo Precision Co., Ltd.)).

[0363]

[0364] The coating composition manufactured in the following examples is coated on a rigid polyvinyl chloride plate of 50 × 50 × 2 mm (the maximum height measured according to JIS B 0601 is below 1 μm), so that the dry film thickness reaches 150 μm. Drying was carried out for 5 days, and a test p...

manufacture example 1

[0385] The viscosity at 25°C is 700 mm when both ends of the molecular chain are terminated by silanol groups. 2 900 parts by weight of dimethylpolysiloxane (manufactured by Momentive, XF3905) per s and a specific surface area of ​​200 m 2 100 parts by weight of surface hydrophobized fumed silica (manufactured by Japan Arrosil Co., Ltd. (Japan Aerosil Corporation), R-972) using a stirring mixer (manufactured by Dalton Corporation (Dalton Corporation) , 5NDMV) were uniformly mixed at 150° C. for 2 hours to obtain basic mixture 1. Base mix 1 has a viscosity of 1530mm 2 / s.

manufacture example 2～4

[0387] In addition to using YF3057 (viscosity: 3000mm 2 / s, manufactured by Momentive), YF3807 (viscosity: 20000mm 2 / s, manufactured by Momentive) and YF3802 (viscosity: 80000mm 2 / s, manufactured by Momentive) as the dimethylpolysiloxane whose molecular chain ends were terminated with silanol groups in Production Example 1, base mixtures 2, 3 and 4 were obtained in the same manner as in Production Example 1. The viscosities of base mixtures 2 and 3 are respectively 8670mm 2 / s, 46000mm 2 / s. Base mix 4 could not be subjected to viscosity measurements due to its high viscosity.

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Abstract

The present invention addresses the problem of providing: a ship with a reduced friction drag, which can keep the affinity for a gas such as air in water for a long period, has a high fluid friction drag reduction effect, is economically advantageous and has little influence on the environment; a coating composition which enables the formation of a coating film that can keep the affinity for a gas such as air in water for a long period, has a friction drag reduction effect and can exhibit a stain-proof function under stream or under static conditions; and others. The present invention relates to a coating composition which enables the formation of a coating film having a specified static in-water bubble contact angle and a specified in-water bubble roll (slip) angle and can be used for a ship with a reduced friction drag utilizing a gas-lubricating function in water. The present invention also relates to a stain-proof coating composition which comprises a specific organopolysiloxane (A), a specific organosilane (B) and a specific hydrophobic material (C) in specified amounts and can be used for a ship with a reduced friction drag utilizing a gas-lubricating function in water.

Description

technical field [0001] The present invention mainly relates to a coating composition for reducing frictional resistance of a ship utilizing the function of gas lubrication in water, a coating film formed from the composition, a ship coated with the coating film, a method for manufacturing the ship, and prediction of the above-mentioned frictional resistance reducing effect A method, a device for predicting the above-mentioned frictional resistance reducing effect, and a frictional resistance reducing system for the above-mentioned frictional resistance reducing ship. Background technique [0002] In a sailing ship, wave resistance due to generation of waves, pressure shape resistance due to the shape of the bottom of the ship, and frictional resistance due to viscosity of water (current frictional resistance) act. Wave resistance and shape resistance have been greatly reduced by research so far, but frictional resistance accounts for 60% to 80% of the total resistance of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04B63B1/38B63B59/04C09D5/16C09D7/12G01N13/00
CPCY02T70/122C09D183/04G01N2013/0241C09D5/16B63B1/38B63B59/04G01N13/02G01N13/00G01N2013/0208C09D7/12C09D5/1675Y02T70/10C08K5/5415C08L83/00
Inventor 道前孝晴山下和春田中秀幸
Owner CHUGOKU MARINE PAINTS
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