JPH08225493A - New compound containing fluorine - Google Patents

Abstract

PURPOSE: To obtain a new compound useful as a monomer containing fluorine, and excellent in compatibility with a monomer containing a polyfluoroalkyl group. CONSTITUTION: This compound containing fluorine of the formula CH2 =CR- COOCH(CH2 R<f> )CH2 O(R<1> O)n R<2> [R and R<2> are each H or methyl; R<f> is a polyfluoroalkyl; R<1> is an alkylene; (n) is 1 to 10]. The compound is obtained by reacting (meth)acryloy chloride with an alcohol containing the polyfluoroalkyl group and an oxyalkylene group. When the compound containing fluorine is converted into a copolymer containing the compound as a constituent unit, a high-performance water-and-oil repellent capable of simultaneously imparting high water repellency and excellent fouling eliminating properties is obtained. The new compound containing fluorine is excellent in compatibility with other compounds containing fluorine and an extremely stable latex is obtained by carrying out the polymerization especially in a dispersion system.

Description

Detailed Description of the Invention

[0001]

[0001] The present invention relates to a novel fluorine-containing compound. The fluorine-containing compound of the present invention can be a useful high-performance water and oil repellent that simultaneously imparts high water repellency and excellent stain releasability when it is made into a copolymer containing this as a constitutional unit.

[0002]

2. Description of the Related Art Water- and oil-repellent agents composed of polymers or copolymers of polyfluoroalkyl group-containing monomers such as perfluoroalkyl acrylate have been widely known. JP-A-49-75472 and JP-A-50-2099
No. 1, No. 53-134786, No. 53-134787.
Gazettes, U.S. Pat.
In the specification No. 4 and the like, a polyfluorinated group-containing monomer is added to a polyfluorinated group-containing monomer for the purpose of imparting the property that stains once attached are likely to be removed by washing or the like (generally referred to as stain release property or SR property). A water / oil repellent composed of a copolymer obtained by copolymerizing a hydrophilic group-containing monomer has been proposed.

[0003]

However, since the compatibility between the polyfluoroalkyl group-containing monomer and the hydrophilic group-containing monomer is extremely poor, it is difficult to obtain an effective copolymer particularly in the emulsion polymerization method. It was

[0004] It is an object of the present invention to overcome the aforementioned disadvantages of the prior art. That is, it is intended to improve the compatibility with the polyfluoroalkyl group-containing monomer by introducing a fluorine atom into the hydrophilic group-containing monomer.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a novel fluorine-containing compound represented by the general formula (1).

[0006]

## STR2 ## _{CH 2 = CR-COOCH (CH} 2 R f) CH 2 O (R 1 O) n R 2 (1)

In the formula (1), R and R ² are a hydrogen atom or a methyl group, R ^f is a polyfluoroalkyl group, R ¹ is an alkylene group, and n is an integer of 1 to 20.

In the general formula (1), R is a hydrogen atom or a methyl group, and R ¹ is preferably an alkylene group having 1 to 4 carbon atoms, particularly preferably an ethylene group. R ² is a hydrogen atom or a methyl group; R ^f is preferably a perfluoroalkyl group having 3 to 21 carbon atoms;
Two perfluoroalkyl groups are preferred. Furthermore, R ^f
May be a polyfluoroalkyl group having 3 to 21 carbon atoms in which a part of fluorine atoms is substituted by chlorine atoms or hydrogen atoms.

N is an integer of 1 to 20, preferably 3 to 15
Is an integer. When n is 2 or more, different alkylene oxides such as ethylene oxide and propylene oxide may be bonded in a block or random manner as R ¹ O.

The above-mentioned fluorine-containing compound represented by the general formula (1) (hereinafter simply referred to as "fluorine-containing compound") is synthesized, for example, as follows.

[0011]

Embedded image

Here, R, R ¹ , R ² , R ^f and n have the same meanings as described above.

That is, a polyfluoroalkyl group-containing epoxy compound (1) and an oxyalkylene group-containing compound (2) having at least one end having a hydroxyl group are mixed with boron trifluoride etherate in a solvent such as toluene or in a non-solvent. By reacting in the presence of an epoxy ring-opening catalyst such as a complex, an alcohol (3) containing a polyfluoroalkyl group and an oxyalkylene group is obtained. Further, by reacting (3) with (meth) acrylic acid chloride (4), a fluorine-containing compound (1) which is a (meth) acrylate containing a polyfluoroalkyl group and an oxyalkylene group is obtained. Specific examples of the novel fluorine-containing compound (1) of the present invention obtained are as follows.

[0014]

CH ₂ = C (CH ₃ ) COOCH [CH ₂ (CF ₂ ) ₇ CF ₃ ] CH ₂ O (CH ₂ CH ₂ O) ₉ CH ₃ CH ₂ = C (CH ₃ ) COOCH [CH ₂ ( CF ₂ ) ₇ CF ₃ ] CH ₂ O (CH ₂ CH ₂ O) ₄ CH ₃ CH ₂ = C (CH ₃ ) COOCH [CH ₂ (CF ₂ ) ₅ CF ₃ ] CH ₂ O (CH ₂ CH ₂ O) ₁₅ CH ₃ CH ₂ = CHCOOCH [CH ₂ (CF ₂ ) ₆ CF (CF ₃ ) ₂ ] CH ₂ O (CH ₂ CH ₂ O) ₉ CH ₃ CH ₂ = CHCOOCH [CH ₂ (CF ₂ ) ₁₁ CF ₃ ] CH ₂ O (CH ₂ CH ₂ O) ₁₂ H

As the polyfluoroalkyl group-containing compound (hereinafter simply referred to as R ^f -containing compound) copolymerizable with the fluorine-containing compound (1), for example, the following vinyl compounds are preferable.

[0016]

Embedded image CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ OCOCH = CH ₂ CF ₃ (CF ₂ ) ₄ CH ₂ OCOC (CH ₃ ) = CH ₂ (CF ₃ ) ₂ CF (CF ₂ ) ₆ (CH ₂ ) ₃ OCOCH = CH ₂ CF ₃ (CF ₂ ) ₆ COOCH = CH ₂ CF ₃ (CF ₂ ) ₁₁ CONH (CH ₂ ) ₂ OCOCH = CH ₂ CF ₃ (CF ₂ ) ₂ CH ₂ CH ₂ OCH ₂ CH ₂ OCH = CH ₂

[0017]

Embedded image CF ₃ (CF ₂ ) ₅ CH ₂ CH (OH) CH ₂ OCH ₂ CH ₂ OCH = CH ₂ (CF ₃ ) ₂ CF (CF ₂ ) ₈ (CH ₂ ) ₃ OCOC (CH ₃ ) = CH ₂ (CF ₃ ) ₂ CF (CF ₂ ) ₁₀ (CH ₂ ) ₃ OCOCH = CH ₂ CF ₃ (CF ₂ ) ₆ (CH ₂ ) ₂ OCOC (CH ₃ ) = CH ₂ (CF ₃ ) ₂ CF (CF ₂ ) ₅ CH ₂ OCOCH = CH ₂ CF ₃ (CF ₂ ) ₇ SO ₂ N (C ₃ H ₇ ) (CH ₂ ) ₂ OCOC (CH ₃ ) = CH ₂ CF ₃ (CF ₂ ) ₇ (CH ₂ ) ₄ OCOCH = CH ₂ CF ₃ (CF ₂ ) ₇ SO ₂ N (C ₃ H ₇ ) (CH ₂ ) ₂ OCOCH (CH ₃ ) = CH ₂ (CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH (OH) CH ₂ OCOCH = CH ₂

Particularly preferred are (meth) acrylic acid esters containing a terminal perfluoroalkyl group having 3 to 21 carbon atoms, and more preferably 6 to 14 carbon atoms. H (CF ₂ ) ₁₀ CH ₂ OCOCH = CH ₂ , CF
An R ^f -containing compound in which a part of the fluorine atoms is replaced by a hydrogen atom or a chlorine atom, such as ₂ Cl (CF ₂ ) ₁₀ OCOCH═CH ₂ , can also be mentioned, but in terms of water and oil repellency, it is possible to use a perf at the end. Those containing a fluoroalkyl group are preferred.

The weight ratio of the fluorine-containing compound / ^Rf- containing compound as a structural unit of the copolymer obtained by copolymerizing the fluorine-containing compound of the present invention (hereinafter also referred to as a specific copolymer) is 5 to 80.
/ 20-95, preferably 10-50 / 50-90.

In order to improve the adhesiveness of the specific copolymer to the article or the cross-linking property within the specific copolymer molecule, the film forming property and the flexibility of the specific copolymer, etc. It is preferable to further copolymerize the following copolymerizable compounds at about 20% by weight.

For example, ethylene, vinyl acetate, vinyl chloride, vinyl fluoride, vinylidene halide, styrene,
α-methylstyrene, p-methylstyrene, acrylic acid and its alkyl ester, methacrylic acid and its alkyl ester, poly (oxyalkylene) (meth) acrylate, (meth) acrylamide, diacetone (meth) acrylamide, methylolated diacetone (meth) ) Acrylamide, N-methylol (meth) acrylamide, vinyl alkyl ether, halogenated alkyl vinyl ether, vinyl alkyl ketone, butadiene, isoprene, chloroprene, glycidyl (meth) acrylate,
2-hydroxyethyl (meth) acrylate, aziridinylethyl (meth) acrylate, benzyl (meth) acrylate, isocyanatoethyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, maleic anhydride, One or more polymerizable compounds not containing a polyfluoroalkyl group, such as aziridinyl (meth) acrylate, (meth) acrylate having polysiloxane, and N-vinylcarbazole, as structural units of the specific copolymer It can be copolymerized.

In order to obtain the specific copolymer, various polymerization reaction methods and conditions can be arbitrarily selected, and various polymerization methods such as bulk polymerization, solution polymerization, suspension polymerization, emulsion polymerization, radiation polymerization and photopolymerization can be used. Can be adopted. In particular, since the compatibility between the fluorine-containing compound and the ^Rf- containing compound, which are the main constituent units of the specific copolymer, is good, the emulsion polymerization can be produced at a much higher yield than before.

As the polymerization initiation source, various polymerization initiators such as organic peroxides, azo compounds and persulfates, and ionizing radiations such as γ-rays can be employed. As the surfactant, almost all of various anionic, cationic or nonionic emulsifiers can be used, and a mixed cationic and nonionic emulsifier is preferably used.

The polymerizable compound as a raw material can be dissolved in a suitable organic solvent and subjected to solution polymerization by the action of a polymerization initiation source (eg, peroxide, azo compound or ionizing radiation soluble in the organic solvent used). Suitable solvents for solution polymerization are trichlorotrifluoroethane, tetrafluorodifluoroethane, methyl chloroform, ethanol,
Isopropanol and a mixed solvent thereof.

The specific copolymer thus obtained is useful as a water / oil repellent. When the water- and oil-repellent agent is prepared into a solvent-type composition, the concentration of the specific copolymer in the organic solvent is not particularly limited, but usually about 0.05% by weight or more in the treatment of the fiber fabric or the like. Satisfactory performance can be imparted. Also, about 4 to 50% by weight, preferably 6 to 35%.
It can also be prepared as a concentrated solution of about 10% by weight, and these are treated at the time of treatment at about 0.05-4% by weight, preferably 0.3-1.
It can be used after being diluted to about 5% by weight.

Therefore, when the specific copolymer concentration is 0.05
It can be prepared over a wide range of .about.50% by weight, preferably 0.3 to 35% by weight. If the concentration is too low, performance will be insufficiently provided, and if the concentration is too high, it will be difficult to form a uniform solution. The concentration of the specific copolymer is preferably the same when preparing an emulsion-type or dispersion-type composition.

The organic solution of the specific copolymer is further prepared by adding dichlorodifluoromethane, fluorotrichloromethane, dichlorotetrafluoroethane, propane, butane, vinyl chloride, dimethyl ether, CO ₂ , N ₂ O.
By adding a propellant such as described above and filling an appropriate container, an aerosol can be formed.

The water / oil repellent comprising the above-mentioned specific copolymer can be prepared by any method according to the type of the article to be treated and the preparation form (solution type, emulsion type, dispersion type, aerosol type, etc.). Can be applied to the article to be processed. For example, in the case of a solution type, a method of applying a known method of coating processing such as dip coating on the surface of the object to be processed and drying the same may be adopted.

If necessary, the composition may be applied together with a suitable crosslinking agent to carry out curing. In the case of an aerosol type, it can be simply sprayed and sprayed on the object to be processed, and can be immediately dried to exhibit sufficient performance. Furthermore, the specific copolymer containing a polyfluoroalkyl group may be mixed with another polymer blender, and other water repellents, oil repellents or insect repellents, flame retardants, antistatic agents, dye stabilizers, An appropriate additive such as a wrinkle agent can be added and used in combination.

The articles which can be treated with the water / oil repellent comprising the specific copolymer are not limited to fiber fabrics, but may be various examples. For example, glass, paper, wood, leather, fur, asbestos, brick, cement, metals and oxides, ceramic products, plastics,
Painted surface and plaster. As a textile fabric,
Natural animal and vegetable fibers such as cotton, hemp, wool and silk, various synthetic fibers such as polyamide, polyester, polyvinyl alcohol, polyacrylonitrile, polyvinyl chloride and polypropylene, semi-synthetic fibers such as rayon and acetate, glass fiber, Inorganic fibers such as asbestos fibers,
Alternatively, a woven fabric of these mixed fibers may be used.

[0031]

The fluorine-containing compound of the present invention has good compatibility with the ^Rf- containing compound, and can produce a copolymer having a hydrophilic portion in a polymer at random. Furthermore, since the polyfluoroalkyl group and the polyoxyalkylene group are introduced in a branched form in the side chain, it is considered that the structural changes in air and water are likely to occur. From these facts, it is considered that the water- and oil-repellent obtained by copolymerizing the fluorine-containing compound of the present invention has particularly improved stain release properties. However, such a description is merely an aid for understanding the present invention and does not limit the present invention.

[0032]

Next, examples of the present invention will be described more specifically, but the present invention is not limited to these examples. The water repellency and oil repellency shown in the examples are shown on the following scale. That is, the water repellency is shown by the water repellency number (see Table 1) by the spray method of JIS-L1005, and the oil repellency is obtained by applying the test solution shown in Table 2 to a few drops on the sample cloth at two places (diameter about 4 m).
m) and determine by the permeation state after 30 seconds (AAT
CC-TM 118-1966).

[0033]

[Table 1]

[0034]

[Table 2]

The dirt removability (SR property) test was conducted as follows. That is, spread the test cloth on the blotting paper laid horizontally, drop 5 drops of heavy fuel oil B (SAE 20W-40, which was discharged after traveling 4000 km in a small passenger car), and put a polyethylene sheet on it, and put 2 kg on it. After 60 seconds, remove the weight and the polyethylene sheet, wipe off excess oil, leave at room temperature for 1 hour,
1 kg with test cloth and ballast cloth with electric washing machine, 60 g of detergent (Super Zab: trade name), bath volume 35 liters,
Treat at 50 ° C for 10 minutes, rinse and air dry. The dried test cloth was compared with the standard photo board for judging the state of residual stains,
It is indicated by the corresponding judgment grade (see Table 3). The standard photographic plate was AATCC Test Method 130-1.
977 was used.

[0036]

[Table 3]

The water repellency number, oil repellency, and SR properties with a + sign indicate that the respective properties are slightly better.

[Example 1] CH ₃ O (CH ₂ CH ₂ O) ₉ H 214 g
(0.5 mol) in a toluene solution was added with 2.13 g of a boron trifluoride etherate compound to give a compound 2 represented by the formula (6).
38 g (0.5 mol) are slowly added dropwise at 50 ° C.

[0039]

[Chemical 7]

After completion of the dropwise addition, the mixture is aged for 5 hours. After the raw material disappeared, toluene was distilled off, and the alcohol CH ₃ O (CH ₂ CH ₂ O) ₉ CH ₂ CH (OH)
445 g of CH ₂ C ₈ F ₁₇ was obtained. Here 500 g of ethyl acetate,
50 g (0.5 mol) of triethylamine was added, the temperature was raised to 0 ° C., and 52 g (0.5 mol) of methacrylic acid chloride was added dropwise. After aging at room temperature for 3 hours, the mixture is hydrolyzed and extracted with ether. After drying, the solvent was distilled off to obtain the desired product (7). Yield 365
g (75% yield).

[0041]

CH ₂ = C (CH ₃ ) COOCH (CH ₂ C ₈ F ₁₇ ) CH ₂ O (CH ₂ CH ₂ O) ₉ CH ₃ (7)

¹ H NMR (δ ppm, acetone-d ₆ ) 1.90 (3 H, CCH ₃ ) 2.
_{70 (2H, CH 2 CF 2} ), 3.28 (3H, OCH 3), 3.35~3.80 (38H, OCH 2),
4.25 (1H, OCH), 5.65 (1H, CH ₂ = C), 6.10 (1H, CH ₂ = C). ¹⁹ FNMR (δppm) -81.8 (3F, CF ₃ ),-113.0 (2F, CH ₂ CF ₂ ), -12
2.0 (6F),-123.3 (4F),-126.7 (2F).

Example 2 104 g of CH ₃ O (CH ₂ CH ₂ O) ₄ H
2.13 g of boron trifluoride ether complex was added to a toluene solution of (0.5 mol) to give a compound 2 represented by the formula (6).
38 g (0.5 mol) are slowly added dropwise at 50 ° C. After the dropping is completed, the mixture is aged for 5 hours. After the disappearance of the raw materials, the toluene was distilled off, and the alcohol CH ₃ O (CH ₂ CH ₂ O) ₄ CH ₂ CH (OH) CH ₂ C ₈ F ₁₇ was added.
37 g were obtained.

To this, 300 g of ethyl acetate and 50 g (0.5 mol) of triethylamine were added, and the mixture was brought to 0 ° C., and 52 g (0.5 mol) of methacrylic chloride was added dropwise. After aging at room temperature for 3 hours, the product is hydrolyzed and extracted with ether. After drying, the solvent was distilled off to obtain the desired product (8). Yield 297 g (79% yield).

[0045]

Embedded image CH ₂ CC (CH ₃ ) COOCH (CH ₂ C ₈ F ₁₇ ) CH ₂ O (CH ₂ CH ₂ O) ₄ CH ₃ (8)

¹ H NMR (δ ppm, acetone-d ₆ ) 1.79 (3H, CCH ₃ ) 2.
_{56 (2H, CH 2 CF 2} ), 3.18 (3H, OCH 3), 3.25~3.65 (18H, OC H 2),
4.13 (1H, O-CH) , 5.55 (1H, CH 2 = C), 6.03 (1H, CH 2 = C) 19 FNMR (δppm) -81.5 (3F, CF 3), -. 1
_{13.5 (2F, CH 2 CF 2} ), - 121.8 (6
F), -123.0 (2F), -123.5 (2F),
-126.7 (2F).

[Polymerization Examples 1-4, Comparative Examples 1-2] Internal volume 1
In a 00 ml glass ampoule, 20 g of the monomer in the ratio (weight ratio) shown in Table 4 and t-dodecyl mercaptan 0.1
5 g, ethyl acetate 4 g, azobisisobutyronitrile 0.6 g, cationic surfactant Pharmine / DMC / acetate (manufactured by Kao Corporation) 0.2 g, nonionic surfactant N
-740 (manufactured by Nippon Emulsifier Co., Ltd.), 1.0 g, pure water
8 g were charged. The gas phase of the ampoule is sealed after replacement with nitrogen,
Emulsion polymerization by shaking at 60 ° C. for 12 hours.
An emulsion containing F was obtained.

The emulsion thus obtained was diluted with water to a concentration of 0.6% by weight, a polyester cloth was dipped in the emulsion for 2 seconds, and the cloth was put between two rubber rollers. It was squeezed to have a wet pickup of 67%. Then 100
The resultant was dried at a temperature of 3 ° C. for 3 minutes, and further subjected to a heat treatment at a temperature of 175 ° C. for 1 minute to perform a water / oil repellent treatment. Table 5 shows the water / oil repellency and SR property of the cloth to be treated thus obtained.

[0049]

[Table 4]

[0050]

[Table 5]

[0051]

The novel fluorine-containing compound of the present invention has an excellent effect that the compatibility with other fluorine-containing compounds is remarkably improved, and particularly when these compounds are polymerized in an aqueous dispersion, A stable latex is obtained.

Since the obtained water- and oil-repellent is a copolymer containing the novel fluorine-containing compound of the present invention as a constitutional unit, not only the water- and oil-repellency is excellent, but also the stain release property (S
R property) is extremely excellent.

Claims (2)

[Claims] 1. A fluorine-containing compound represented by the general formula (1). CH ₂ = CR-COOCH (CH ₂ R ^f ) CH ₂ O (R ¹ O) _n R ² (1) (In the formula, R and R ² are hydrogen atoms or methyl groups, and R ^f is polyfluoro. Alkyl group, R ¹ is alkylene group, n is 1 to
Indicates an integer of 20. ) 2. The fluorine-containing compound according to claim 1, wherein n is an integer of 3 to 15.