JPH0686590B2 - Covering material to prevent snow and icing - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a snow accretion / ice accretion preventing coating material for covering a building in a snowy area in winter to prevent snow accretion / ice accretion.

[Prior art]

Damage to buildings caused by snow on the roof in heavy snowfall areas in winter,
It is necessary to grate snow to prevent it from collapsing. In addition, facilities such as traffic signs may not function as intended due to being buried in snow or freezing of snow or water. The present situation is to rely on human power as a countermeasure against these snow and ice accretions, but as one of the countermeasures in recent years, a coating material is applied to the surface of the building to solve the problem. Wood or snow prevention methods have been proposed.

(A) Vinyl resin paint, acrylic resin paint or snow-flake lacquer containing silicon oil and / or wax (JP-A-58-132073). (B) Water-insoluble resin with fatty acid amide Snow-removing composition obtained by adding a compound (Japanese Patent Laid-Open No. 58-118880) (C) Roofing material coated with fluorine rubber coating (Japanese Patent Laid-Open No. 58-118880)
No. 90966) (d) Waterproof paint containing a plasticizer having an OH group as a coating film component (Kaisho 57-164165) (e) Deicing and snow removing method of applying self-polishing paint (JP-A-58) -118881).

[Problems to be solved by the invention]

However, any of the above-mentioned coating materials or methods (a) to (e) tends to decrease the effect in the short term or with the passage of time, and the effect of preventing snow and icing is insufficient. It was not sufficient as a measure to prevent snow and icing.

[Means for solving problems]

INDUSTRIAL APPLICABILITY The present invention eliminates or reduces the snow removal operation by performing simple coating on objects that require difficult snow removal operation, such as buildings, vehicles, and traffic signs in winter heavy snowfall areas. As a result of repeated intensive research,
Surprisingly, a coating material containing a specific amount of a copolymer containing a triorganotin salt of a specific monomer composition and a specific amount of a pigment can solve the above problems and has a sufficient function of preventing snow and ice formation. I found that I can exert.

That is, the present invention is a copolymer obtained by copolymerizing (A) 70 to 95% by weight of a triorganotin salt monomer of an αβ unsaturated carboxylic acid and 5 to 30% by weight of another ethylenically unsaturated compound monomer.
The present invention relates to a coating material for preventing snow and icing, which comprises 60 to 97% by weight and (B) pigment 3 to 40% by weight.

The α-unsaturated carboxylic acid triorganotin salt monomer used in the present invention is represented by the following general formula.

(Wherein R ¹ represents an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group, an aryl group, an alkanol group or an aralkyl group, R ² represents hydrogen, a methyl group or —CH ₂ COOSn ▲ R ¹ ₃ ▼, R ³ and R ⁴ represent hydrogen, a methyl group or —COOR ⁵ , provided that when R ² is —CH ₂ COOSn ▲ R ¹ ₃ ▼, R ³ and R ⁴ are
It is never COOR ⁵ . R ⁵ represents hydrogen, an alkyl group, an artenyl group, a cycloalkyl group, or an aryl group. ) Examples of such substances include triethyltin methacrylate, triethyltin acrylate, tripropyltin (meth) acrylate, tributyltin (meth) acrylate, triamyltin (meth) acrylate, dibutyloctyltin (meth) acrylate, triphenyltin (meth). )
Examples thereof include acrylate, tritolyltin (meth) acrylate, diethylphenyltin (meth) acrylate, tricyclohexyltin (meth) acrylate, di (tributyltin) itaconate and di (tributyltin) malenate.

Examples of the other ethylenically unsaturated compound monomer copolymerized with the triorganotin salt monomer of the above general formula include (meth) acrylic acid, metal, ethyl, n-propyl,
Isopropyl, n-butyl, isobutyl, t-butyl,
(Meth) acrylic acid monoesters such as n-ventil, n-hexyl, isohexyl, ethylhexyl, phenyl, octyl, decyl and dodecyl, styrene conductors such as styrene, α-methylstyrene, and P-ethylstyrene, vinyl propionate. Examples thereof include vinyl esters such as vinyl acid acrylate, acrylic acid, methacrylic acid, dibutyl maleate, hydroxyethyl methacrylate, hydroxyethyl acrylate, glycidyl acrylate, dimethylaminoethyl, methacrylate acrylonitrile, acrylamide, and butadiene. More than one type of monomer is used.

The blending amount of the triorganotin salt monomer and the other ethylenically unsaturated compound monomer is required to be in the range of 70 to 95% by weight. 70
If it is less than 100% by weight, the effect of preventing snow accretion and icing cannot be fully exerted, and if it exceeds 95% by weight, the effect of preventing snow accretion and icing is good, but the weather resistance decreases, so the effect is long-lasting do not do.

Examples of the catalyst used for the synthesis of the copolymer specified in the present invention include dibutyl peroxide benzoyl peroxide, dicumyl peroxide, t-butyl hydroperoxide quinene hydroperoxide and adbisisobutyronitrile. As the solvent, aliphatic and aromatic hydrocarbons such as n-hexane, heptane, xylene, toluene, benzene and cyclohexane, methyl acetate, ethyl acetate, cellosolve acetate,
Ester solvents such as butyl acetate, ketones such as acetone, methyl ethyl ketone and isobutyl methyl ketone, ethers such as diethyl ether and tetrahydrofuran ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, N-methylpyrrolidone, chloroform, carbon tetrachloride, or Isopropyl alcohol,
Examples include alcohol solvents such as n-butanol.

The copolymer of the present invention is obtained by heating the above-mentioned solvent to about 80 ° C., dripping each of the above-mentioned monomers and catalyst at a constant rate, and then further adding
It can be obtained by a known method such as reacting at 80 ° C to 90 ° C for several hours.

In the present invention, in order to improve the effect of preventing snow accretion and icing, it is essential to blend a pigment into the copolymer, and the blending amount is 3 to 60 to 97% by weight of the copolymer.
~ 40 wt% is required. If it is less than 3% by weight, the weather resistance of the coating film is weak, the effect of preventing snow accretion and ice formation does not last for a long time, and if it exceeds 40% by weight, the blending amount of the copolymer becomes too small. Due to the surface roughness, the effect of preventing snow accretion cannot be fully exerted.

As such a pigment, titanium oxide zinc carbon black,
Yellow lead, Benji, Cyanine blue, Cyanine green, Color pigments such as monoazo red, monoazo yellow, and cyazo yellow, extender barium sulfate, kaolin, clay, talc calcium carbonate and other extender pigments, and other rust preventive pigments. Is mentioned.

The coating material of the present invention may contain a resin, a solvent, an auxiliary agent, and the like, which are usually blended with a coating material, in addition to the above-mentioned copolymer and pigment, and these are treated with a sand grind mill, a roll mill, etc. by a conventional method for producing a coating material. It is prepared by uniformly mixing and dispersing.

Appropriate methods such as spraying, brushing, and rolling can be applied to the object.

Example 1 263 g of xylene was added to a four-necked one Kolben equipped with a stirring blade, a thermometer, a nitrogen gas inlet tube, and a cooling tube monomer dropping funnel.
And heat to 80 ° C and add tributyltin methacrylate 320
g, a mixture of 60 g of methyl methacrylate, 20 g of ethyl hexyl acrylate and 1.4 g of azobisisobutyl nitrile was dropped at a constant rate over 3 hours, and after the dropping, the mixture was kept at 80 to 90 ° C for 3 hours, and 96 g of xylene was added to solidify it. 760 g of a copolymer having a content of 51.5% and a viscosity of 4.5 poise (25 ° C.) was obtained.

Next, this copolymer was uniformly mixed and dispersed with a sand grind mill in the following formulation to obtain a coating material of the present invention.

Copolymer 80 ^wt% Disbaron # 6900-20X (Kusumoto Kasei) (auxiliary agent) 1 xylene (solvent) 9 valve pattern SR550 (Tone Sangyo) (pigment) 10 100 The ice protection effect was evaluated, and the results are shown in Table 1.

Examples 2 to 7 and Comparative Examples 1 to 4 According to Example 1, copolymers and coating materials having the compositions shown in Table 1 were obtained, and the snow accretion prevention effect was evaluated for these. Shown in the table.

Comparative Example 5 An ordinary alkyd resin-based galvanized iron coating for roofing (trade name SP galvanized paint manufactured by Shinto Paint Co., Ltd.) was evaluated in the same manner as in Example, and the results are shown in Table 1.

Test method (1) Snow sliding angle (a) Each coating material is applied to a 30 × 50 cm polished mild steel plate (25 μ × 2 times brushed) and dried at room temperature for 10 days to give a test piece. 7 cm in diameter on a horizontal test piece
Place a 10 cm (about 300 cc) high lump of snow and gradually incline the test piece to measure the angle at which the snow begins to slip. (B) A test piece prepared under the same conditions was subjected to outdoor exposure for one year, and the same test as (a) was conducted.

(2) Amount of snow: Each coating material was applied to the tin roof (former coating Alkyd) of a house in Kanazawa city (25μ x 2 brushes)
Then, the state of snowfall during the snowfall was observed.

(3) Snow accretion prevention effect: Water was sprayed on the test piece prepared in (1) to freeze it at night (about -5 ° C), and the next morning (about 0 to 3).
The frozen state (° C) was observed.

◯: No icing x: Significant icing (4) Weather resistance: The state of the coating film applied to the galvanized iron roof in (2) after one year was observed.

Adhesiveness: 2m / m wide goggle cut cellophane tape peeling Discoloration: Hue difference between initial and one year later ○: Almost no difference △: There is a difference Gloss retention: 1 year gloss / initial gloss ratio (5 ) Comprehensive evaluation ○: Good ×: Poor [Effect of the invention] The coating material of the present invention has a remarkable effect of preventing snow accretion and icing in the winter heavy snowfall area as compared with the conventional galvanized iron paint, and also has the same effect as the conventional method Is short-term and does not decrease over time.

Further, it is economical because the effect can be obtained by ordinary painting.

Claims (1)

[Claims] 1. A copolymer 60 obtained by copolymerizing (A) 70 to 95% by weight of a triorganotin salt monomer of an αβ unsaturated carboxylic acid with 5 to 30% by weight of another ethylenically unsaturated compound monomer.
~ 97% by weight, (B) pigment 3 to 40% by weight, a coating material for preventing snow and icing.