JP2003128980A - Composition for preventing snow accretion and ice coating and method for preventing snow accretion and ice coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composition exhibiting stable prevention effect of snow accretion and ice coating on shape of snow and daily difference in temperature and humidity and to provide a method for preventing snow accretion and ice coating. SOLUTION: This composition for preventing ice coating and snow accretion comprises a copolymer as a main component composed of a hydrophobic constituent unit and a hydrophilic constituent unit in which the hydrophobic unit contains one unit represented by general formula (1) or general formula (2) (R1 and R2 are each H or a 1-10C hydrocarbon group; R3 is H or 1-10C aliphatic hydrocarbon group; RF1 and RF2 is H or a perfluoroalkyl group obtained by substituting a part of H of a 1-20C hydrocarbon group with F) and the hydrophilic unit contains one unit represented by general formula (3) or (4) (R4 and R5 are each H or 1-10C hydrocarbon group; R6 is C or a 1-10C aliphatic hydrocarbon group; R7 and R8 are each a 2-10C straight-chain or branched-chain oxyalkylene group; R9 and R10 are each H or a 1-10C hydrocarbon group; p and q are each 1-50).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow accretion prevention composition and a snow accretion prevention method for preventing snow accretion on traffic signs and roofs in cold snowy regions.

[0002]

2. Description of the Related Art In snowy and cold regions, snow accretion on outdoor structures is a serious problem that causes various damages and obstacles in daily life. For example, disconnection of an electric wire or collapse of a steel tower due to snow and ice causes a power transmission failure, and snow and ice on a train, a ship, an aircraft, or an automobile causes a service failure. Further, snow ice on road traffic signs and traffic lights, and falling snow and ice blocks from houses and buildings cause life-threatening accidents. Therefore, research and development of snow and ice prevention technology are being actively carried out in various fields.

Hitherto, as means for preventing snow accretion,
It has been considered to apply a paint having a snow-ice prevention effect to the surface of the structure. It is effective to reduce the intermolecular force, that is, to reduce the surface free energy in order to make it difficult for snow and ice to adhere, and a water-repellent fluoropolymer has been used as a paint for preventing snow and ice.

However, in wet snow and ice when the temperature is relatively high, the hydrophilic surface is more likely to drop off the snow,
On the contrary, there is a report (Hokkaido Industrial Test Report No. 299) that a hydrophobic surface such as a fluoropolymer is more likely to fall off in dry snow and ice when the temperature is relatively low. This is when wet snow and ice are present on a solid surface, that is,
When there is a relatively large amount of water film between the solid surface and the snow and ice, the hydrophilic surface is more likely to cause snow gliding, and when dry snow and ice is present on the solid surface, that is, between the solid surface and the snow and ice. When there are relatively many air layers, it means that the hydrophobic surface is more likely to snow ice.

That is, according to this report, a hydrophobic surface is more effective for dry snow and ice when the temperature is relatively low, and a hydrophilic surface is more effective for wet snow and ice when the temperature is relatively high. become.

[0006]

Therefore, a material in which the surface of the material changes to hydrophilic / hydrophobic in response to changes in the environment is most preferable.

From the above, it has been considered that the use of a material whose surface characteristics change according to the quality of snow and ice is effective for preventing snow accretion that is effective for both wet and dry snow and ice. However, no such material has been developed.

By the way, although many fluoropolymers having a hydrophilic portion have been developed so far, no report has been made on a material for preventing snow accretion whose surface characteristics change depending on the quality of snow and ice. Further, Japanese Patent Publication No. 4-3788 discloses that
An antifouling agent comprising a fluorine-containing polymer compound is disclosed, and since this antifouling agent has a —OH group in the side chain, it is reported to have an antifouling effect even in a small amount as compared with conventional antifouling agents. ,
There have been no reports of switching between hydrophobicity and hydrophilicity, where surface characteristics change depending on the quality of snow and ice.

In view of the above circumstances, the present invention is a composition for preventing snow accretion which always exhibits a stable effect of preventing snow accretion against the shape of snow and ice, that is, the environment such as temperature and humidity, or the difference in temperature and humidity during the day. Another object is to provide a method for preventing snow accretion.

[0010]

The first aspect of the present invention for solving the above-mentioned problems is mainly composed of a copolymer having a hydrophobic constitutional unit exhibiting hydrophobicity and a hydrophilic constitutional unit exhibiting hydrophilicity. The composition for preventing snow and ice contained as, wherein the hydrophobic constitutional unit includes at least one represented by the following general formula (1) or (2), and the hydrophilic constitutional unit is the following general formula (3) or (4) A composition for preventing snow accretion containing at least one represented by (4).

[0011]

[Chemical 5]

(Wherein R ₁ and R ₂ independently represent hydrogen or a hydrocarbon group having a carbon number of 1 to 10 and containing a linear, branched, cyclic or aromatic ring. R ₃ is hydrogen or a carbon number of 1 to 10). Represents a linear, branched or cyclic aliphatic hydrocarbon group of R _F1
And R _F2 independently represent fluorine, or a perfluoroalkyl group in which at least a part of hydrogen of a hydrocarbon group having a carbon number of 1 to 20 and containing a linear, branched, cyclic or aromatic ring is fluorine-substituted, and a carbon-carbon bond. To at least part of -O-,-
CO-, -COO-, amine, -NHCO-, -S-,
-SO -, - SO ₂ - of which may contain other bonds,
A part of hydrogen other than fluorine-substituted may be replaced by halogen other than fluorine. )

[0013]

[Chemical 6]

(Wherein R ₄ and R ₅ independently represent hydrogen or a hydrocarbon group having a linear, branched, cyclic or aromatic ring having 1 to 10 carbon atoms. R ₆ is hydrogen or 1 to 10 carbon atoms. Represents a linear, branched, or cyclic aliphatic hydrocarbon group.
R ₇ and R ₈ independently represent a linear or branched oxyalkylene group having 2 to 10 carbon atoms, and R ₉ and R ₁₀ independently represent hydrogen or a linear, branched, cyclic or C 1 to 10 carbon atom. Represents a hydrocarbon group containing an aromatic ring. Moreover, p and q represent 1-50 independently. )

A second aspect of the present invention is the composition for preventing snow accretion which is characterized in that, in the first aspect, it further contains a paint base for application as a paint.

A third aspect of the present invention is a composition for preventing snow accretion which contains as a main component a copolymer having a hydrophobic constitutional unit exhibiting hydrophobicity and a hydrophilic constitutional unit exhibiting hydrophilicity. The hydrophobic constituent unit contains at least one represented by the following general formula (1) or (2), and the hydrophilic constituent unit contains at least one represented by the following general formula (3) or (4). A method for preventing snow accretion, which comprises providing a composition for preventing snow accretion on the surface of an object for preventing snow accretion.

[0017]

[Chemical 7]

(Wherein R ₁ and R ₂ independently represent hydrogen or a hydrocarbon group having a carbon number of 1 to 10 and containing a linear, branched, cyclic or aromatic ring. R ₃ is hydrogen or a carbon number of 1 to 10). Represents a linear, branched or cyclic aliphatic hydrocarbon group of R _F1
And R _F2 independently represent fluorine, or a perfluoroalkyl group in which at least a part of hydrogen of a hydrocarbon group having a carbon number of 1 to 20 and containing a linear, branched, cyclic or aromatic ring is fluorine-substituted, and a carbon-carbon bond. To at least part of -O-,-
CO-, -COO-, amine, -NHCO-, -S-,
-SO -, - SO ₂ - of which may contain other bonds,
A part of hydrogen other than fluorine-substituted may be replaced by halogen other than fluorine. )

[0019]

[Chemical 8]

(Wherein R ₄ and R ₅ independently represent hydrogen or a hydrocarbon group having a carbon number of 1 to 10 and containing a straight-chain, branched, cyclic or aromatic ring. R ₆ is hydrogen or a carbon number of 1 to 10). Represents a linear, branched, or cyclic aliphatic hydrocarbon group.
R ₇ and R ₈ independently represent a linear or branched oxyalkylene group having 2 to 10 carbon atoms, and R ₉ and R ₁₀ independently represent hydrogen or a linear, branched, cyclic or C 1 to 10 carbon atom. Represents a hydrocarbon group containing an aromatic ring. Moreover, p and q represent 1-50 independently. )

A fourth aspect of the present invention is the method for preventing snow accretion according to the third aspect, characterized in that the composition for preventing snow accretion is applied as a paint to an object for preventing snow accretion.

A fifth aspect of the present invention is the method for preventing snow accretion according to the third aspect, which comprises forming an object for preventing snow accretion with a resin containing the composition for preventing snow accretion. .

In the present invention, since the hydrophilic / hydrophobic copolymer used as the composition for preventing snow accretion has a hydrophilic constitutional unit together with a hydrophobic constitutional unit, the surface may have a hydrophobic superiority or a hydrophilic superiority depending on the environment. It has a high quality and shows characteristics not seen in the past. That is, the surface of the coating film or molded article formed of the composition for preventing snow accretion of the present invention has a hydrophobicity predominance in the air and shows a hydrophobic property, but a hydrophilicity predominance in the water shows a hydrophilic property.

The present invention is a newly synthesized copolymer composed of a hydrophobic constitutional unit and a hydrophilic constitutional unit and having a hydrophobic portion and a hydrophilic portion separately in a side chain, and the surface thereof is exposed to air. It was completed based on the finding that the surface characteristics change to hydrophobic when it is in contact with water, and hydrophilic when it is in contact with water.

As will be described later in Test Examples, the composition for preventing snow accretion of the present invention has a superior hydrophobicity in the air and a superior hydrophilicity in water. It is considered that the hydrophobicity becomes dominant and the snow and ice are prevented, and conversely, when the moist snow and ice adheres, the hydrophilicity becomes dominant and the snow and ice are peeled off. this is,
As described above, the hydrophilic surface is more likely to fall off on wet snow and ice when the temperature is relatively high, and conversely, on the dry snow and ice when the temperature is relatively low, the hydrophobic surface such as a fluoropolymer may be removed. This is supported by the report that snow and ice are more likely to fall off, and the snow and ice preventing composition of the present invention is effective for preventing snow and ice.

Since the composition for preventing snow accretion of the present invention comprises a hydrophobic constitutional unit and a hydrophilic constitutional unit and has a hydrophobic portion and a hydrophilic portion separately in the side chains, the surface characteristics are hydrophobic depending on the environment. It is considered that the hydrophilic part of the side chain moves to the surface when exposed to air, and the hydrophilic part of the side chain moves to the surface when exposed to water. It is considered that this is due to a phenomenon generally called a flip-flop phenomenon, which tries to reduce the interfacial free energy by moving to.

Incidentally, for example, the fluorine-containing polymer compound shown in the prior art (Japanese Patent Publication No. 4-3788) has a hydrophilic portion and a hydrophobic portion in the same side chain. That is, in comparison with this, it is considered that the anti-snow and ice composition of the present invention has a high molecular mobility of the side chain, and the flip-flop phenomenon is likely to occur, and thus the hydrophobic-hydrophilic switching occurs more sensitively. Conceivable. Further, since the present copolymer has a hydrophobic constitutional unit and a hydrophilic constitutional unit separately, it is relatively easy to synthesize and it is easy to control the balance between the hydrophobic portion and the hydrophilic portion of the side chain. From this point as well, the snow and ice preventing composition of the present invention comprising a copolymer having a hydrophilic portion and a hydrophobic portion shown in the above general formula is a snow and ice preventing composition that responds to changes in the environment. Optimal. Therefore, it can be expected that the control of the surface properties will be easy.

The composition for preventing snow accretion of the present invention is as described above.
Una, site R showing hydrophobicity_F1, R _F2With Polya
Acrylate or polymethacrylate (hereinafter poly
(Expressed as (meth) acrylate) or polyacrylic
Hydrophobic constitutional unit consisting of amide, and site having hydrophilic group
Poly (meth) acrylate or polyacrylic acid having
A copolymer comprising a hydrophilic constitutional unit composed of amide.
The structure of the copolymer is not particularly limited.
Block copolymers obtained by anionic polymerization,
Copolymer, or generally obtained by radical polymerization
Random copolymers, alternating copolymers can be mentioned.
It

Here, the site having hydrophobicity is fluorine or a perfluoroalkyl group in which at least a part of hydrogen of a hydrocarbon group having 1 to 20 carbon atoms is substituted with fluorine, and the perfluoroalkyl group is A linear, branched or cyclic perfluoroalkyl group, a fluorine-substituted aryl group, or the like can be given.

Further, R ₇ , which is a main site showing hydrophilicity,
Representative examples of R ₈ include a polyoxyalkylene group, and preferably polyoxyethylene or polyoxypropylene.

The composition for preventing snow accretion of the present invention comprises a (meth) acrylate monomer or acrylamide monomer having a hydrophobic portion and a (meth) acrylate monomer or acrylamide monomer having a hydrophilic portion in a predetermined ratio. May be mixed and polymerized, or a monomer having a site having hydrophobicity and a monomer having a site having hydrophilicity may be respectively oligomerized and then copolymerized. It is possible to appropriately and easily adjust the balance between the region having the property and the region having the hydrophilic property. Incidentally, it is needless to say that the type of the monomer having a hydrophobic region and the type of the monomer having hydrophilicity may be different, and an acrylate monomer, a methacrylate monomer, and an acrylamide monomer may be appropriately mixed and used in each type. Absent.

The anti-snow and ice composition of the present invention can be used by adding it to a base polymer, and as the base polymer to which the copolymer of the present invention is added, a generally used polymer coating composition, or Mention may be made of molding polymer compositions.

The content ratio of the hydrophilic / hydrophobic copolymer varies depending on the kind of the hydrophilic / hydrophobic copolymer, and is 0.1% by weight to 99.
Although 9% by weight can be selected, a remarkable effect is preferably exhibited at 5% by weight or more.

[0034]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on embodiments.

(Synthesis Example 1) In a 100 ml wide-necked eggplant flask equipped with a three-way stopcock, 0.827 g of α, α'-azobisisobutylnitrile (AIBN) as an initiator and polyethylene glycol having a number average molecular weight of about 475 were used. Methyl ether methacrylate (PEGMEMA475)
After introducing 2.00 g and performing deaeration and argon substitution,
Purified 2,2,2-trifluoroethylmethacrylate (TFEMA) 8.00 g and distilled benzene in an amount such that the concentration of TFEMA is 1 mol / liter (expressed as L) are added, and the temperature is 60 ° C. for 24 hours at 75 ° C. The reaction was carried out for 24 hours. Then, the reaction solution was frozen with liquid nitrogen to stop the reaction and dried as it was to obtain a candy-like light yellow transparent poly (TFEMA-co-PEGMEMA.
475) was obtained.

The yield and the yield are 10.34 g and 9 respectively.
It was 6.7%. In addition, GPC measurement of the obtained sample
Number average molecular weight and molecular weight distribution (polystyrene
When converted), Mn = 7100, Mw / Mn =
It was 2.43. further, ¹By H-NMR measurement,
It was confirmed that the polymerization was carried out almost as charged.

(Synthesis Example 2) Instead of PEGMEMA475, polyethylene glycol methyl ether methacrylate (PEGMEMA1) having a number average molecular weight of about 1100 was used.
100) was used in the same manner as in Synthesis Example 1 except that a candy-like thin white transparent poly (TFEMA-co-PE) was used.
GMEMA 1100) was obtained.

The yield and the yield are 10.23 g and 9 respectively.
It was 5.7%. Moreover, when the number average molecular weight and the molecular weight distribution of the obtained sample were measured by GPC, Mn = 7200 and Mw / Mn = 1.31.
Furthermore, ¹ H-NMR measurement confirmed that the polymerization was carried out almost as charged.

(Test Example 1) 10 wt% of the polymers obtained in Synthesis Examples 1 and 2 were dissolved in distilled toluene, and this was spin-coated (1500 rpm / 30se) on a cover glass.
After c), it was naturally dried for 2 days. Using this as a sample, the contact angle with water and air was measured. The results are shown in Table 1 below.

The contact angle was measured using a contact angle meter (image processing type) manufactured by Kyowa Interface Science Co., Ltd., and the contact angle with air was measured after immersing the sample in distilled water for 1 hour. The value is the value obtained by subtracting 180 degrees.

[0041]

[Table 1]

(Examples 1 to 12) Base coating (Fluorine resin coating manufactured by Dainippon Color Material Industry Co., Ltd .: trade name NovaFusso P
F250 C1-25B) was added by changing the mixing ratio of the copolymers obtained in Synthesis Examples 1 and 2 to obtain various snow and ice prevention compositions.

(Comparative Example) Only the base coating material obtained by the synthesis example without adding the copolymer was used as the snow and ice preventing composition of the comparative example.

(Test Example 2) Examples 1 to 12 and Comparative Examples Various snow-and-ice preventing compositions were applied on a cover glass with a brush and naturally dried for 2 days. Using this as a sample, the contact angle with water and air was measured. The results are shown in Table 2 below and FIG.

FIG. 1 (a) shows changes in the contact angle with water in the air, where Δ indicates Examples 1 to 6 and Comparative Example, and ● indicates Examples 7 to 12 and Comparative Example. Correspond. Also,
Figure 1 (b) shows the change in contact angle with air in water.
Corresponds to Examples 1 to 6 and Comparative Example, and ◆ indicates Examples 7 to 1.
2 and Comparative Example. 1 (a) and 1 (b)
Shows the contact angle of the copolymer alone.

[0046]

[Table 2]

As shown in Table 2, the anti-snow and ice compositions of Examples 1 to 12 in which the hydrophilic / hydrophobic copolymer was added to the base paint were more hydrophobic in air and less water in water as compared with Comparative Examples. Hydrophilicity was predominantly exhibited. In particular, when a hydrophilic / hydrophobic copolymer suitable for the base paint was selected and added, as the content was increased, the property that hydrophobicity was dominant in air and hydrophilicity in water was remarkably exhibited. .

(Examples 13 and 14) The copolymers obtained in Synthetic Examples 1 and 2 were added to a base coating (a fluororesin coating manufactured by Dainippon Color & Materials Co., Ltd .: trade name Novafuso PF250 C1-25B), respectively. Add 25% on a dry coating basis,
The composition for preventing snow accretion of Examples 13 and 14 was obtained.

Test Example 3: Ice Adhesion Test Example 13
And 14 and the composition for preventing snow accretion of Comparative Example were coated on an aluminum test plate (50 × 50 mm) for an ice adhesion test to give a test piece.

Using a dedicated ice adhesion tester, -1,-
The adhesion of ice at temperatures of 3 and -5 ° C was measured.

The measurement procedure is as shown in FIG.
Stainless steel ring 11 (diameter 25.4m for ice making on top
m) was placed, and after sufficiently cooling to a predetermined temperature, distilled water at 5 ° C. was poured and left for 1 hour to freeze the water in the stainless steel ring 11 to freeze ice on the surface of the test piece 10. 5m from the shearing direction (lateral direction) on the stainless steel ring 11
A load was applied at a speed of m / min to separate the ice from the sample surface. The value obtained by dividing the load at that time by the adhesion area was taken as the adhesion force of ice (kgf / cm ² ). The measurement was performed 5 times at each temperature (n = 5), and the average value was obtained.

The results are shown in Table 3 and FIG. From these results, unlike the comparative example, the snow-and-ice protection compositions of Examples 13 and 14 showed excellent properties at each temperature, and the snow-and-ice protection composition of Example 14 was particularly superior.

[0053]

[Table 3]

(Test Example 4: Snow Sliding Resistance Test) Example 1
3 and 14 and the snow ice-preventing composition of Comparative Example with size 1
A test piece was prepared by applying it on an aluminum plate of 50 × 75 mm.

A snow block 21 was prepared in a low temperature laboratory,
Place on the test piece 20 as shown in FIG.
1 side of the test piece 20 by pushing the side surface of the slip resistance (kg
f) was read with a load cell. This test was carried out when the snow block 21 was -10 ° C, which was dry snow containing no water, and 0 ° C.
It was conducted for the case of wet snow containing water.

The results of this slip resistance are shown in FIG. 5 for wet snow and in FIG. 6 for dry snow. The numerical value on the vertical axis in the figure is negative because of the compressive force.

As a result, the anti-snow and ice compositions of Examples 13 and 14 exhibited excellent properties as compared with the comparative examples, and in particular, the anti-snow and ice composition of Example 14 showed a low value in the case of wet snow. Indicated.

As described above, the composition for preventing snow accretion of the present invention can be applied to an object such as a sign or a roof to reduce the adhesion of snow and ice and prevent snow and ice accumulation in a relatively wide range of environments.

[0059]

Industrial Applicability As described above, since the composition for preventing snow accretion of the present invention contains a hydrophilic / hydrophobic copolymer, it exhibits hydrophobicity in air and hydrophilicity in water, and thus has a relatively wide range. Under the environment, snow and ice adhesion reduction and snow and ice accumulation are prevented.

[Brief description of drawings]

FIG. 1 is a graph showing the results of Test Example 2.

FIG. 2 is a diagram illustrating a method of Test Example 3;

FIG. 3 is a graph showing the results of Test Example 3.

FIG. 4 is a diagram illustrating a method of Test Example 4;

FIG. 5 is a graph showing the results of Test Example 4.

FIG. 6 is a graph showing the results of Test Example 4.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C09D 5/00 C09D 5/00 Z 133/24 133/24 155/00 155/00 (72) Inventor Aoki Aitoshi 2-3-6 Shirite, Tsurumi-ku, Yokohama-shi, Kanagawa Kitatsunaga Industry Co., Ltd. (72) Inventor Ryoichi Nagano 2-3-3, Shirute, Tsurumi-ku, Yokohama-shi, Kanagawa F-Term (Reference) 4J027 AC02 AC03 AC06 AC09 AJ01 BA07 BA14 CB09 CC02 CD00 4J038 CG141 CG142 CH111 CH112 CH201 CH202 CH231 CH232 CR061 CR062 GA02 GA09 GA13 NA05 4J100 AL08P AL08R AM21Q AM21S BA08R BA08S BB17P BB17Q BC41R BC37S CA04 DA05 CA05

Claims (5)

[Claims] 1. A snow-ice preventing composition comprising as a main component a copolymer having a hydrophobic constitutional unit exhibiting hydrophobicity and a hydrophilic constitutional unit exhibiting hydrophilicity, wherein the hydrophobic constitutional unit is The hydrophilic structural unit contains at least one represented by the following general formula (1) or (2), and the hydrophilic constitutional unit is represented by the following general formula (3).
Alternatively, the composition for preventing snow accretion containing at least one represented by (4). [Chemical 1] (However, R ₁ and R ₂ are independently hydrogen or C _{1 to} C 1.
0 represents a hydrocarbon group containing a straight chain, branched chain, cyclic or aromatic ring. R ₃ represents hydrogen or a linear, branched, or cyclic aliphatic hydrocarbon group having 1 to 10 carbon atoms. R _F1 and R _F2 independently represent fluorine or a perfluoroalkyl group in which at least a part of hydrogen of a hydrocarbon group having a carbon number of 1 to 20 including a linear, branched, cyclic or aromatic ring is substituted with fluorine, At least a part of the carbon bond has -O-, -CO-, -CO.
O-, amine, -NHCO-, -S-, -SO-, -S
It may contain another bond of O ₂ — and part of hydrogen other than fluorine-substituted may be replaced by halogen other than fluorine. ) [Chemical 2] (However, R ₄ and R ₅ are independently hydrogen or C 1 to C 1.
0 represents a hydrocarbon group containing a straight chain, branched chain, cyclic or aromatic ring. R ₆ represents hydrogen or a linear, branched, or cyclic aliphatic hydrocarbon group having 1 to 10 carbon atoms. R ₇ and R ₈ independently represent a linear or branched oxyalkylene group having 2 to 10 carbon atoms, and R ₉ and R ₁₀ independently represent hydrogen or a linear or branched C 1 to 10 carbon atom; It represents a hydrocarbon group containing a cyclic or aromatic ring. Moreover, p and q represent 1-50 independently. ) 2. The composition for preventing snow accretion according to claim 1, further comprising a paint base for application as a paint. 3. A composition for preventing snow accretion containing as a main component a copolymer having a hydrophobic constitutional unit exhibiting hydrophobicity and a hydrophilic constitutional unit exhibiting hydrophilicity, wherein the hydrophobic constitutional unit is The hydrophilic structural unit contains at least one represented by the following general formula (1) or (2), and the hydrophilic constitutional unit is represented by the following general formula (3).
Alternatively, a method for preventing snow accretion which comprises providing a snow accretion prevention composition containing at least one represented by (4) on the surface of a snow accretion prevention object. [Chemical 3] (However, R ₁ and R ₂ are independently hydrogen or C _{1 to} C 1.
0 represents a hydrocarbon group containing a straight chain, branched chain, cyclic or aromatic ring. R ₃ represents hydrogen or a linear, branched, or cyclic aliphatic hydrocarbon group having 1 to 10 carbon atoms. R _F1 and R _F2 independently represent fluorine or a perfluoroalkyl group in which at least a part of hydrogen of a hydrocarbon group having a carbon number of 1 to 20 including a linear, branched, cyclic or aromatic ring is substituted with fluorine, At least a part of the carbon bond has -O-, -CO-, -CO.
O-, amine, -NHCO-, -S-, -SO-, -S
It may contain another bond of O ₂ — and part of hydrogen other than fluorine-substituted may be replaced by halogen other than fluorine. ) [Chemical 4] (However, R ₄ and R ₅ are independently hydrogen or C 1 to C 1.
0 represents a hydrocarbon group containing a straight chain, branched chain, cyclic or aromatic ring. R ₆ represents hydrogen or a linear, branched, or cyclic aliphatic hydrocarbon group having 1 to 10 carbon atoms. R ₇ and R ₈ independently represent a linear or branched oxyalkylene group having 2 to 10 carbon atoms, and R ₉ and R ₁₀ independently represent hydrogen or a linear or branched C 1 to 10 carbon atom; It represents a hydrocarbon group containing a cyclic or aromatic ring. Moreover, p and q represent 1-50 independently. ) 4. The method for preventing snow accretion according to claim 3, wherein the composition for preventing snow accretion is applied as a paint to an object for preventing snow accretion. 5. The method for preventing snow accretion according to claim 3, wherein an object for preventing snow accretion is formed with a resin containing the composition for preventing snow accretion.