JPH06322213A - Water-repellent oil-repellent composition and article coated therewith - Google Patents

Abstract

PURPOSE:To obtain a water-repellent oil-repellent composition which can stably show excellent water repellency and oil repellency and is excellent in film- forming properties and durability by mixing a specified fluororesin with a fluoropolymer having a polyfluoroalkyl group. CONSTITUTION:The composition comprises 1-95wt.% fluororesin having a fluorocycloaliphatic structure in the main chain and 99-5wt.% fluoropolymer having a polyfluoroalkyl group. It is desirable that the fluororesin is a polymer having a ring structure in the main chain, and a polymer having at least 20mol% ring structure is desirable from the viewpoints of transparency, mechanical properties, etc. The molecular weight of the fluororesin is desirably 0.01-3.0dl/g in terms of an intrinsic viscosity. When this viscosity is excessively small, the film-forming properties are poor, whereas, when it is excessively large, the solubility in solvent is poor. When this composition is applied to leather articles such as shoes and bags, it is effective to give excellent water repellency and oil repellency thereto and to make them proof against the penetration of rainwater in a rainy day and has a persistent excellent effect.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fluorine-based water / oil repellent composition and an article coated with the composition.

[0002]

2. Description of the Related Art In recent years, water and oil repellent treatment has been extensively carried out, and various water and oil repellent compositions have been provided according to the purpose.
Among these, as a cotton cloth for clothing, a fluorine-containing polymer containing an acrylate or methacrylate monomer unit having C _n F _{2n + 1} (an integer of 20 ≧ n ≧ 4) as a polyfluoroalkyl group as an active ingredient is known. . On the other hand, it is known to coat a nozzle for an inkjet printer, a mold, a printed wiring board and the like with a fluororesin having a fluorinated alicyclic structure in its main chain.

[0003]

Fluorine-containing polymers containing polyfluoroalkyl groups are excellent in water and oil repellency, but they are inadequate in film-forming properties and in abrasion resistance and durability. It was On the other hand, the fluororesin having a fluorinated alicyclic structure is slightly inferior in water and oil repellency to the fluoropolymer containing a polyfluoroalkyl group, and has good film-forming property, so that the cotton cloth is water and oil repellent treated. If you do, the texture was inferior.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the drawbacks of the prior art, that is, 1 to 95% by weight of a fluororesin having a fluorine-containing alicyclic structure in its main chain and a polyfluoroalkyl group. Fluorine-containing polymer containing 99 to 5% by weight
And a product coated with the composition,
Is.

The polymer having a fluorinated alicyclic structure is obtained by polymerizing a monomer having a fluorinated cyclic structure, or a fluorinated monomer having at least two polymerizable double bonds is subjected to cyclopolymerization. A polymer having a ring structure in the main chain obtained as a result is suitable.

A polymer having a ring structure in its main chain obtained by polymerizing a monomer having a fluorinated ring structure is disclosed in Japanese Examined Patent Publication No. 63-63.
No. 18964, for example. That is, perfluoro (2,2-dimethyl-1,3-dioxole)
It can be obtained by homopolymerizing a polymer having a fluorine-containing ring structure such as, or by copolymerizing with a radical polymerizable monomer such as tetrafluoroethylene.

Polymers having a ring structure in the main chain obtained by cyclopolymerization of a fluorine-containing monomer having at least two polymerizable double bonds are disclosed in JP-A-63-238111 and 63-238115. It is known from the official gazette. That is, it can be obtained by cyclopolymerization of a monomer such as perfluoro (allyl vinyl ether) or perfluoro (butenyl vinyl ether), or copolymerization with a radical polymerizable monomer such as tetrafluoroethylene.

Further, perfluoro (2,2-dimethyl-
A monomer having a fluorine-containing ring structure such as 1,3-dioxole) and at least 2 such as perfluoro (allyl vinyl ether) or perfluoro (butenyl vinyl ether)
It may be a polymer obtained by copolymerizing a fluorine-containing monomer having one polymerizable double bond.

The polymer having a fluorine-containing alicyclic structure is
A polymer having a ring structure in the main chain is preferable, but a polymer containing 20 mol% or more of the ring structure is preferable in terms of transparency, mechanical properties, and the like.

The polymer having a fluorine-containing alicyclic structure preferably has a molecular weight of 0.01 to 3.0 dl / g in terms of intrinsic viscosity. If the intrinsic viscosity is too small, the film-forming property will be poor, and if it is too large, the solubility in the solvent will be poor.

The glass transition point T _g (° C.) of a polymer having a fluorinated alicyclic structure is the heat resistant temperature T of the substrate to be coated.
It is preferable that T _g <T + 40 with _respect to (° C.).

The polymer having a fluorinated alicyclic structure preferably contains a terminal group which reacts with the substrate to be coated. Examples of the terminal group include, but are not limited to, carboxylic acid, carboxylic acid ester, carboxylic acid fluoride, and silyl-modified carboxylic acid.

The fluoropolymer containing a polyfluoroalkyl group in the present invention is a homopolymer obtained by radical polymerization of an α, β-unsaturated monomer containing a polyfluoroalkyl group (hereinafter abbreviated as Rf group) or the above Rf. It is a copolymer of a group-containing α, β-unsaturated monomer and a radical-polymerizable unsaturated monomer (hereinafter abbreviated as comonomer).

The α, β-unsaturated monomer containing the Rf group is R
It has a structure in which the f group is bonded to the polymerizable unsaturated group directly or via a divalent bonding group. As the structure of the Rf group,
Usually, a structure in which a hydrogen atom in a hydrocarbon group such as a linear or branched alkyl group or alkenyl group is replaced by a fluorine atom is selected, but a structure containing an oxygen atom ether-bonded with a carbon atom. May be The Rf group usually has 1 to 20 carbon atoms, preferably 4 to 16 carbon atoms.

The Rf group is a group containing two or more fluorine atoms, and a group in which 80% or more of the atoms bonded to carbon atoms are fluorine atoms is preferable. Further, other atoms than the fluorine atom and the hydrogen atom may be bonded to the carbon atom. The other atom is preferably a chlorine atom.

When the Rf group is a group containing an oxygen atom ether-bonded to a carbon atom, a group containing an oxyfluoroalkylene moiety in the structure is preferable. Further, it may be a group containing a structure in which two or more oxyfluoroalkylenes are connected. Examples of the oxyfluoroalkylene moiety include oxyfluoroethylene and oxyfluoropropylene.

A trifluoromethyl group, a difluoromethyl group, a chlorodifluoromethyl group or the like is selected as the structure of the terminal portion of the Rf group, and the preferred structure is the trifluoromethyl group.

The most preferable Rf group is an Rf group in which all hydrogen atoms are replaced by fluorine atoms (hereinafter referred to as a perfluoroalkyl group). The perfluoroalkyl group preferably has a linear structure, and has 4 to 16 carbon atoms, especially 6 carbon atoms.
-12 are preferable.

The Rf group is bonded to the polymerizable unsaturated group directly or via a divalent bonding group. Examples of the divalent linking ^{group, -COOR 2 -, - COOR 2} N (R
³ ) SO ₂ −, —COOR ² N (R ³ ) CO— and the like can be mentioned, but the examples are not limited to these. Here, R ² is an alkylene group and usually has 2 to 6 carbon atoms.
One, preferably two, alkylene groups are preferred. R ² may also be an alkylene group containing an ether-bonded oxygen or phenylene group. The alkylene group is an alkyl group,
A halogen atom or the like may be bonded. R ³ represents an alkyl group and preferably has 1 to 4 carbon atoms.

Specific examples of the Rf group-containing α, β-unsaturated monomer are shown in Chemical formula 1, but the present invention is not limited to these examples. Acrylate and methacrylate monomers are preferable because they have good polymerizability. In Chemical Formula 1, R ¹ represents a hydrogen atom or a methyl group, and φ represents a phenylene group. Rf ′ is a perfluoroalkyl group having 4 to 16 carbon atoms.

[0021]

CH ₂ = C (R ¹ ) COOCH ₂ CH ₂ Rf ', CH ₂ = C (R ¹ ) COOCH (CH ₃ ) CH ₂ Rf' CH ₂ = C (R ¹ ) COOCH ₂ CH ₂ N ( CH ₃ ) CORf ', CH ₂ = C (R ¹ ) COOCH ₂ CH ₂ N (C ₂ H ₅ ) CORf' CH ₂ = C (R ¹ ) COOCH ₂ CH ₂ N (C ₃ H ₇ ) CORf ', CH ₂ = C (R ¹ ) COOCH ₂ CH ₂ N (CH ₃ ) SO ₂ Rf 'CH ₂ = C (R ¹ ) COOCH ₂ CH ₂ N (C ₃ H ₇ ) SO ₂ Rf' 、 CH ₂ = C (R _{^{1) COOCH (CH 2 Cl)}} CH 2 OCH 2 CH 2 N (CH 3) SO 2 Rf ', CH 2 = C (R 1) COOCH 2 CH 2 φCH 2 OCH 2 CH 2 CH 2 Rf', CH 2 = C (R ¹ ) Rf '

The comonomer of the present invention is not particularly limited as long as it is a known monomer having a radically polymerizable unsaturated group, and examples thereof include various acrylates and methacrylates ( Hereinafter, both acrylates and methacrylates are referred to as (meth) acrylates, the same applies to other compounds), (meth)
Monomers having a radically polymerizable unsaturated group such as acrylamides, (meth) acrylonitriles, vinyls, and olefins can be selected.

Specific examples of the comonomer are shown below, but the present invention is not limited to these examples. 2-ethylhexyl (meth) acrylate, stearyl (meth) acrylate, cyclohexyl (meth) acrylate, (meth) acrylic acid, polyoxyalkylene (meth) acrylate, glycidyl (meth) acrylate, benzyl (meth) acrylate, isocyanate ethyl ( (Meth) acrylate, aziridinyl (meth) acrylate, hydroxyalkyl (meth) acrylate, (meth) acrylate having a polysiloxane moiety.

(Meth) acrylamide, diacetone (meth) acrylamide, methylolated (meth) acrylamide, vinyl acetate, vinyl chloride, vinyl fluoride, vinyl alkyl ether, halogenated alkyl vinyl ether, vinyl alkyl ketone, N-vinylcarbazole,
Ethylene, butadiene, isoprene, chloroprene, styrene, α-methylstyrene, p-methylstyrene, maleic anhydride. The above comonomer may be contained alone or in combination of two or more.

Of these comonomers, stearyl acrylates such as stearyl acrylate and stearyl methacrylate and / or vinyl chloride are preferred.

In the copolymerization of the Rf group-containing α, β-unsaturated monomer and the comonomer of the present invention, the proportion of the Rf group-containing α, β-unsaturated monomer is 60% by weight or more, and particularly 8
It is preferably 0% by weight or more.

In the present invention, the Rf group-containing α, β-
Homopolymerization of an unsaturated monomer or copolymerization with a comonomer can be carried out by solution polymerization in a fluorine-based solvent, emulsion polymerization in an aqueous medium, or suspension polymerization in an aqueous medium.

Homopolymerization or copolymerization is usually carried out in the presence of a radical polymerization initiator. Known compounds can be used as the radical polymerization initiator. The radical polymerization initiator may be used alone or in combination of two or more. The amount of the radical polymerization initiator is usually 0.01 to 3 parts by weight, preferably 0.1 to 100 parts by weight of all the monomers.
1.5 parts by weight is preferable.

The number average molecular weight of the fluoropolymer containing a polyfluoroalkyl group is 1,000 to 1,000,0.
00 is preferable. Number average molecular weight of 1,000 to 200,
A value of 000 is particularly preferable because of its solubility or dispersibility in a solvent.

In the present invention, the ratio of the fluororesin having a fluorine-containing alicyclic structure to the main chain and the fluoropolymer having a polyfluoroalkyl group is usually 1:99 to 95.
Although it is between 5 and 5, this ratio can be appropriately changed depending on the use, purpose, treatment method and the like. In the usual case, the composition of the present invention is used by further diluting it with a solvent 10 to 1000 times at the time of coating. For example, when the water- and oil-repellent composition produced by the present invention is applied to a fiber woven fabric or a fiber knitted product, it is used by adjusting the proportion of the composition to about 0.2 to 2% by weight.

The above composition can be prepared in any form such as a coating solution using an organic solvent, an aqueous emulsion and an aerosol according to a conventional method.

The solvent of the coating solution is preferably one in which both the fluororesin having a fluorine-containing alicyclic structure in the main chain and the fluoropolymer having a polyfluoroalkyl group are dissolved or dispersed. The solvent of the coating liquid is preferably a fluorinated solvent. Examples of the fluorine-based solvent are shown below, but the invention is not limited to these examples.

Polyfluoroaromatic compounds such as perfluorobenzene and hexafluorometaxylene, polyfluorotrialkylamine compounds such as perfluorotributylamine and perfluorotripropylamine,
Perfluorohexane, perfluorooctane, (perfluoro-n-octyl) ethane, perfluoro (2,
3,5-trimethylhexane), etc., polyfluoroalkane compounds such as (perfluoro-n-octyl) ethylene, polyfluorocycloalkane compounds such as perfluorocyclohexane, perfluorodecalin, perfluoro (2 -Butyltetrahydrofuran) and other polyfluorocyclic ether compounds. Furthermore, chlorofluorocarbons such as trichlorotrifluoroethane, 1,3-dichloro-1,
Chlorofluorohydrocarbons such as 1,2,2,3-pentafluoropropane and 1,1-dichloro-2,2,3,3,3-pentafluoropropane, fluorine-containing low molecular weight polyethers and the like. These solvents can be used alone or as a mixture.

Further, the above composition can be applied to the article to be treated by any method depending on the kind of the article to be treated, the above-mentioned preparation form and the like. For example, in the case of a coating liquid, a method of adhering it to the surface of an object to be processed and drying it by a known coating processing method such as coating is adopted. If necessary, curing may be performed to improve the adhesion with the object to be treated.

Further, the above composition may optionally contain other water repellent or oil repellent, or a crosslinking agent, an insect repellent, a flame retardant, an antistatic agent, an anti-wrinkle agent and the like.

The article to which the water / oil repellent composition of the present invention can be applied includes various examples without any particular limitation. Examples include, but are not limited to, cotton cloth, fiber woven fabric, fiber knitted fabric, glass, wood, leather, fur, asbestos, brick, cement, metal, metal oxide, ceramic product, plastic, and the like. Examples of cotton cloth, woven fiber, and fiber knit include cotton, hemp, wool, silk and other natural animal and plant fibers, polyamide,
Synthetic fibers such as polyester, polyvinyl alcohol, polyacrylonitrile, polyvinyl chloride and polypropylene, semi-synthetic fibers such as rayon and acetate, inorganic fibers such as glass fiber, carbon fiber and asbestos fiber, or woven or knitted fabrics of these mixed fibers Can be mentioned. When applied to cotton cloth and leather products, the proportion of the fluoropolymer containing a polyfluoroalkyl group is preferably 60% or more so as not to impair the texture. When the article is a fishing line, a nozzle such as an ink jet, or a printed wiring board, it is preferable that the ratio of the fluoropolymer containing a polyfluoroalkyl group is 70% or less because the durability is good.

[0037]

EXAMPLES Next, examples of the present invention will be described more specifically, but it goes without saying that the description does not limit the present invention.

Synthesis Example 1 30 g of perfluorobutenyl vinyl ether, 120 g of ion-exchanged water, 4.8 g of methanol and 76 mg of ((CH ₃ ) ₂ CHOCOO) ₂ as a polymerization initiator were added to an internal volume of 200 ml.
It was placed in a pressure-resistant glass autoclave. After purging the system with nitrogen three times, suspension polymerization was carried out at 40 ° C. for 22 hours.
After the obtained polymer was isolated, it was heat-treated at 300 ° C. and washed with water. As a result, 26 g of polymer A was obtained. The intrinsic viscosity [η] of this polymer was 0.34 in perfluoro (2-butyltetrahydrofuran) at 30 ° C. The glass transition point of the polymer is 108 ° C., and it is a tough and transparent glassy polymer at room temperature. The light transmittance was as high as 95% or more. Infrared spectroscopy showed absorption of carboxylic acid.

Synthesis Example 2 5 g of fluoroacrylate (CH ₂ = CHCOOCH ₂ CH ₂ C _n F _{2n + 1} : n is 9 on average), 68 g of 1,1,2-trifluorotrichloroethane, and azoisobutyrate as a polymerization initiator. 0.52 g of ronitrile was placed in a pressure-resistant glass ampoule. After purging the system with nitrogen three times, polymerization was carried out at 60 ° C. for 15 hours. As a result, 2.2 g of polymer B was obtained. The number average molecular weight of the polymer B was 10,000.

Synthesis Example 3 15 g of fluoroacrylate (CH ₂ = CHCOOCH ₂ CH ₂ C _n F _{2n + 1} : n is 9 on average) and 0.13 of stearyl acrylate.
g, 1,1,2-trifluorotrichloroethane 39
g, stearyl mercaptan 0.37 g, and azoisobutyronitrile 0.26 g as a polymerization initiator were placed in a pressure-resistant glass ampoule. After purging the system with nitrogen three times,
Polymerization was carried out at 0 ° C. for 15 hours. As a result, 1
2.3 g was obtained. Polymer C had a composition of fluoroacrylate to stearyl acrylate of 99: 1 and a number average molecular weight of 100,000.

Synthesis Example 4 15 g of fluoroacrylate (CH ₂ = CHCOOCH ₂ CH ₂ C _n F _{2n + 1} : n is 9 on average), 0.20 of stearyl acrylate
g, 1,1,2-trifluorotrichloroethane 39
g, stearyl mercaptan 0.66 g, and azoisobutyronitrile 0.26 g as a polymerization initiator were placed in a pressure-resistant glass ampoule. After purging the system with nitrogen three times,
Polymerization was carried out at 0 ° C. for 15 hours. As a result, polymer D
2.8 g was obtained. Polymer D had a composition of fluoroacrylate to stearyl acrylate of 99: 1 and a number average molecular weight of 80,000.

Example 1 0.6 part of Polymer A obtained in Synthesis Example 1 and 0.4 part of Polymer B obtained in Synthesis Example 2 were dissolved in 50 parts of perfluoro (2-butyltetrahydrofuran), A fluoropolymer solution was prepared. Next, the glass plate washed with an ultrasonic cleaner was immersed in the fluoropolymer solution and pulled up at a constant speed.
When this glass plate was dried at 80 ° C. for 1 hour, a uniform coating film of the fluoropolymer could be formed on the glass plate.

When the contact angle of the droplet on the surface of this film was measured, it was 111 ° when water was used as the droplet and 62 ° when isopropyl alcohol (IPA) was used, showing excellent water and oil repellency. Turned out to show.

Table 2 shows the results of evaluation of the durability of the film by the method shown in Table 1. As a result, it was found that the durability was also good.

[0045]

[Table 1]

Example 2 A fluorine-containing polymer solution was prepared in the same manner as in Example 1 except that the polymer C was used instead of the polymer B, and dip coating was carried out. As a result, a uniform coating film was obtained. I was able to form. When the contact angle of this film surface was measured,
The water was 115 ° and the IPA was 59 °. The durability test of the film was conducted by the method shown in Table 1.

Example 3 A fluorine-containing polymer solution was prepared in the same manner as in Example 1 except that the polymer D was used in place of the polymer B, and dip coating was performed to obtain a uniform coating film. I was able to form. When the contact angle of this film surface was measured,
Water: 117 °, IPA: 59 °. The durability test of the film was conducted by the method shown in Table 1.

Example 4 0.4 part of Polymer A obtained in Synthesis Example 1 and 0.6 part of Polymer B obtained in Synthesis Example 2 were dissolved in 50 parts of perfluoro (2-butyltetrahydrofuran), A fluoropolymer solution was prepared. Next, the glass plate washed with an ultrasonic cleaner was immersed in the fluoropolymer solution and pulled up at a constant rate. When this glass plate was dried at 80 ° C. for 1 hour, a uniform coating film of the fluoropolymer could be formed on the glass plate.

The contact angles of the droplets on the surface of this film were measured and found to be water: 115 °, IPA: 61 °,
It was found to exhibit excellent water and oil repellency. As a result of evaluating the durability of the film by the method shown in Table 1, it was found that the durability was also good.

Example 5 0.2 part of Polymer A obtained in Synthesis Example 1 and 0.8 part of Polymer B obtained in Synthesis Example 2 were dissolved in 50 parts of perfluoro (2-butyltetrahydrofuran), A fluoropolymer solution was prepared. Next, the glass plate washed with an ultrasonic cleaner was immersed in the fluoropolymer solution and pulled up at a constant speed.
When this glass plate was dried at 80 ° C. for 1 hour, a substantially uniform coating film of the fluoropolymer could be formed on the glass plate.

When the contact angles of the droplets on the surface of this film were measured, they were water: 117 °, IPA: 62 °,
It was found to exhibit excellent water and oil repellency. As a result of evaluating the durability of the film by the method shown in Table 1, it was found that the durability was also good.

Comparative Example 1 When a coating film was formed on a glass plate using only the polymer B without using the polymer A, the film was slightly uneven and fine irregularities in the form of particles were observed. Contact angle is water: 108 °, I
PA: 56 °, but the measured values varied widely. Next, when the durability was evaluated in the same manner as in Example 1, peeling of the film was observed.

Comparative Example 2 When a coating film was formed on a glass plate using only the polymer C, the film was slightly uneven and fine irregularities in the form of particles were observed. The contact angle was water: 112 ° and IPA: 60 °. Next, when the durability was evaluated in the same manner as in Example 1, peeling of the film was observed.

Comparative Example 3 When a coating film was formed on a glass plate using only the polymer D, the film was slightly nonuniform and fine irregularities in the form of particles were observed. The contact angle was water: 103 ° and IPA: 59 °. Next, when the durability was evaluated in the same manner as in Example 1, peeling of the film was observed.

Comparative Example 4 A coating film was formed on a glass plate using only the polymer A. The film was uniform. Contact angle is water: 103 °, IP
A: 55 °. Next, durability evaluation was performed in the same manner as in Example 1.

[0056]

[Table 2]

Example 6 0.1 part of Polymer A obtained in Synthesis Example 1 and 0.9 part of Polymer C obtained in Synthesis Example 3 were dissolved in 100 parts of perfluoro (2-butyltetrahydrofuran), A fluoropolymer solution was prepared. Then spray this solution on a cotton cloth,
It was dried at 150 ° C. As a result, the cotton cloth exhibited excellent water and oil repellency and was also excellent in durability.

Example 7 3.5 parts of Polymer A obtained in Synthesis Example 1 and 1.5 parts of Polymer C obtained in Synthesis Example 3 were dissolved in 95 parts of perfluoro (2-butyltetrahydrofuran), A fluoropolymer solution was prepared. Next, apply this solution to an aluminum mold,
C., and dried at 100.degree. C. for 1 hour.

A urethane resin of the following composition was mixed well, poured into a mold, and heated at 65 ° C. for 3 minutes to cure the molded product. And the secondary processability such as paintability and adhesiveness were evaluated. As a result, the durability was 32 times, the secondary workability was good, and the cleaning of the surface of the molded body was insoluble.

Example 8 0.1 part of Polymer A obtained in Synthesis Example 1 and 0.1 part of Polymer C obtained in Synthesis Example 3 were dissolved in 95 parts of perfluoro (2-butyltetrahydrofuran). A fluoropolymer solution was prepared. Next, immerse nylon fishing line in this solution,
After taking it out, it was air dried. Furthermore, it dried at 70 degreeC for 1 hour. The fishing line had good drainage, and the good drainage was not impaired even after storage in water for 100 hours.

Example 9 0.1 part of Polymer A obtained in Synthesis Example 1 and 0.1 part of Polymer C obtained in Synthesis Example 3 were dissolved in 95 parts of perfluoro (2-butyltetrahydrofuran), A fluoropolymer solution was prepared. Next, this solution was applied onto a polysulfone plate treated with UV ozone and a silane coupling agent to form a coating film. When the contact angle of the ink for inkjet printer was measured on this film,
It exhibited excellent liquid repellency. In addition, 60
After immersion at 7 ° C. for 7 days, the contact angle was measured again and there was no change.

[0062]

The water- and oil-repellent composition of the present invention has a surprisingly water-repellent property of a fluororesin having a fluorine-containing alicyclic structure in its main chain or a fluoropolymer having a polyfluoroalkyl group. Stable water and oil repellency superior to oil repellency. Further, when coated, the film-forming property is excellent and durability is imparted.

The water- and oil-repellent composition of the present invention, when applied to cotton cloth, shows excellent water- and oil-repellency and has excellent durability. When the water / oil repellent composition of the present invention is applied to a mold,
Good mold release sustainability (how many times can be continuously molded before the mold is contaminated) and secondary processability such as paintability and adhesiveness. When the water- and oil-repellent composition of the present invention is applied to fishing line, the fishing line has good drainage and good durability against drainage.

When the water- and oil-repellent composition of the present invention is applied to the nozzle of an ink jet printer, the ink for the ink jet printer is well cut and the printing is beautiful. The water- and oil-repellent composition of the present invention, when applied to a printed wiring board, can favorably prevent the creeping up of flux on the printed wiring board. The water- and oil-repellent composition of the present invention, when applied to leather products such as shoes and bags, shows excellent water and oil repellency to leather products such as shoes and bags, and prevents entry of water on a rainy day.
Its durability is also excellent.

Claims (5)

[Claims] 1. A composition comprising 1 to 95% by weight of a fluororesin having a fluorinated alicyclic structure in its main chain and 99 to 5% by weight of a fluorinated polymer containing a polyfluoroalkyl group. 2. A fluoropolymer having a polyfluoroalkyl group is used as a polyfluoroalkyl group having C _n F.
The composition of claim 1, which is a fluoropolymer containing at least 80% by weight of an acrylate or methacrylate monomer unit having _{2n + 1} (an integer of 20 ≧ n ≧ 4). 3. An article coated with a composition comprising 1 to 95% by weight of a fluororesin having a fluorine-containing alicyclic structure in its main chain and 99 to 5% by weight of a fluoropolymer containing a polyfluoroalkyl group. 4. A fluoropolymer having a polyfluoroalkyl group is used as a polyfluoroalkyl group having C _n F.
The article according to claim 3, which is a fluoropolymer containing at least 80% by weight or more of an acrylate or methacrylate monomer unit having _{2n + 1} (an integer of 20 ≧ n ≧ 4). 5. The article is a leather product such as cotton cloth, fishing line, nozzle, printed wiring board, shoes, bag, etc. or a mold.
Goods.