JPH04178408A - Fluorine-containing copolymer and fluorine-based coating consisting essentially of the same copolymer - Google Patents

Abstract

PURPOSE:To obtain the subject new room temperature curing copolymer, consisting essentially of units derived from a fluoroolefin and units derived from neopentyl vinyl ether and excellent in solubility in organic solvents and compatibility with curing agents. CONSTITUTION:The objective copolymer having 20-97mol% units, derived from a fluoroolefin and expressed by the formula (V, X, Y and Z are H, F, 1-6C alkyl, etc., provided that at least one thereof is F) and 3-80mol% units derived from neopentyl vinyl ether. Furthermore, tetrafluoroethylene, etc., are preferred as the fluoroolefin. The aforementioned copolymer is preferably obtained by copolymerizing a monomer mixture in a prescribed proportion in the presence of a polymerization initiator at 2 10-90 deg.C reaction temperature under 2-50kg/cm<2> reaction pressure.

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a novel fluorine-containing copolymer and a fluorine-based paint containing the copolymer as a main component. More specifically, the present invention provides a fluorine-containing copolymer that is soluble in a solvent, has good compatibility with a curing agent, and is curable at room temperature, The present invention relates to a fluorine-based paint that can provide a coating film that is hard and has excellent weather resistance.

[Conventional technology]

Conventionally, fluorine-containing copolymers have been widely used in many fields due to their extremely excellent heat resistance, mechanical properties, chemical resistance, weather resistance, etc.One of their uses is in the coating of paints. For example, fluororesin paints using tetrafluoroethylene polymers and vinylidene fluoride polymers are known, and these paints have excellent lubricity, non-stick properties, weather resistance, and chemical resistance. Because of its properties, it is used as a coating material in fields such as the chemical industry, food, architecture, and machinery. However, the fluororesin paint requires baking at a high temperature, and its range of use is limited to 1 lJtlld. Therefore, in recent years, attempts have been made to develop solvent-based coatings using fluorine-containing copolymers that are soluble in organic solvents and have reactive groups that can be cured at room temperature. In order to solubilize a fluorine-containing polymer in an organic solvent, it is necessary to disrupt the crystallinity of the fluorine-containing resin and internally plasticize it by introducing an appropriate copolymerization component. As examples of such copolymers, various copolymers have been disclosed so far (Japanese Patent Laid-Open Nos. 57-34107 and 61-2).
Publication No. 75311, Publication No. 61-57609, Publication No. 62
-174213 publication, 63-182312 publication)
. However, when these copolymers are used as coatings, they have the disadvantage that the formed coating film has low hardness and gloss, and is also insufficient in compatibility with curing agents.

[The espionage problem that the invention attempts to solve]

The present invention overcomes the drawbacks of conventional fluorine-containing copolymers that are soluble in organic solvents, and provides a novel room-temperature-curable fluorine-containing copolymer that has good solubility in organic solvents and compatibility with curing agents. The purpose of this invention is to provide a polymer and a fluorine-based paint containing the polymer as a main component that can provide a glossy, hard coating film with excellent weather resistance. [Means for Solving the Problem] In view of the above-mentioned points, the present inventors have conducted extensive research and have found that the above-mentioned problem can be solved by using a specific monomer as a polymerization monomer of a fluorine-containing copolymer. found that it can be solved,
The present invention has now been completed. That is, the present invention provides: (1) A fluorine-containing copolymer comprising the following (A) and (B) as essential constituents, and further containing (C) and/or (D) as constituents. (A) Formula; %Formula%(1) (In the formula, v, x, y and Z may be the same or different, and each represents H, F, CI, an alkyl group having 1 to 6 carbon atoms, and a carbon number 1 to 6 halo-substituted alkyl groups, and at least one of them is F.) Copolymerized unit of fluoroolefin: 20
~97 mol% (B) Copolymerized unit of neopentyl vinyl ether:
3-80 mol%. (C) Copolymerized units of functional group-containing monomer: 0 to 40 mol% (D) Copolymerized units of other monomers: 0 to 40 mol% and ■ The above fluorine-containing copolymer as the main component The present invention provides a fluorine-based paint that has the following properties. The present invention will be explained in detail below. In the copolymer of the present invention, the fluoroolefins forming the unit (A) are olefins having at least one fluorine atom in the molecule, and are preferably:
Examples include barhaloolefins in which all hydrogen atoms of the olefin are replaced with fluorine atoms and other halogen atoms. Specific examples of such fluoroolefins include CH
z□Ch, CHF=CFz, CHt=CFz,
CHz=CHF, CCf F=CFa, CHCIl, C
F,, CCl z=cFz, CCI F=CCIP
, CHF=CCj! z, CHz=CCj! F,
Fluoroethylene type such as CC12=CCj2F; ChCF=Ch, CFICF=CHF, CFiC
H=CFz, CF3CF=CHz, CF3CF=
CHF, CHhCF=CHF, CFiCH=CH
z, CHsCF = CFx, CH1CI'l = C
h, CHsCF=CHz, CFtCICF=CF2
, ChCCl = CFt, CFsCF = CFC1
2, CFzCI CCl = CF2, ChCfCF=C
FCI CFCLCF=Ch, Ch ccz=CC
IF,,CFsCC1! , = CCff1z , CCi
! , FzCF=CG 12, CCfICF=CF! ,
cFzczccz=cczz, CFCf tcC#,=
CC1! , CF, CF=CHC/! ,,CCj!
hcF=cH(/!. cpscc z =CHC/!, CHFtCC1=CC
1,z, ChC1CH=CC2□, CFtCICC
I! =CHCl5 CCj2iCF=CHCj! ,
CFtiICF=CFt, CFJrCH=Ch,
CF3CBr=CHBr, CFtCICBr=
C1b, CHzBrCF=CCfz, CFs
CBr=CHt, CF, CH=CI(Br, CFJr
C) Fluoropropene series such as l=cHF, CFJrCF=Ch; CFsCF, CF=Ch, CFsCF; CFCFs,
CFsC)I=CFCh, CFt=CFCFgCHh
, CFsCFzCF=C! lx, CFsCH=CHC
Fs, Ch=CFCFtCHs, CFt=CFCHzC
Hs, CFsCHzCH=CHz, CFkoCH=CHC
H3, Ch=CHCHtCHs, CHsChC)l=c
tlz, CFHzCH=CHCFlh, CI(sc
FzcH=cHs, CHt=CFCHzCH3, CF. (Ch) TomiCF−CFt, Ch(CFt)icF=c
Examples include fluoroolefin compounds having 4 or more carbon atoms such as Fz, among which the formula; fluoroethylene compounds and fluoropropene compounds are preferred, especially tetrafluoroethylene (CF,=CF,)
, chlorotrifluoroethylene (CF, =CF(1) and hexafluoropropene CCFt =CFCFi)
is suitable. These fluoroolefins may be used alone or in combination of two or more. In the copolymer of the present invention, the content of units formed from the fluoroolefins needs to be in the range of 20 to 97 mol%, preferably 40 to 60 mol%. In the copolymer of the present invention, the content of (B) units formed from neopentyl vinyl ether needs to be in the range of 3 to 80 mol%, preferably 5 to 50 mol%. If the content is less than 3 mol%, the rigidity will be poor and the compatibility with the curing agent will be low, and if it exceeds 80 mol%, the weather resistance will decrease. In the copolymer of the present invention, the above (A) and (B
) In addition to the units, copolymerized units of the functional group-containing monomer (C) and/or (
D) It may contain copolymerized units of other monomers. Examples of the functional group-containing monomer forming the unit (C) include - hydroxy group-containing unsaturated ethers represented by formula (i), - epoxy group-containing unsaturated ethers represented by formula (ii) Examples include hydrolyzable silyl group-containing vinyl monomers represented by formula (ii). (i) CHt=CH-(CHx)t-0-R'-
0H (In the formula, R4 is an alkylene group having 1 to 6 carbon atoms, and i represents 0 or 1.) (ii) (In the formula, j is 0 or l, and k is an integer of 0 to 5. (wherein, m and n are 0 or 1, R' and R-1R1 represent a monovalent group, and at least one has 1 carbon number) to 6 alkoxy groups). Unsaturated ether containing hydroxyl group! ! [Specific examples of formula (i) 1 include hydroxymethyl vinyl ether, hydroxyethyl vinyl ether, 3-hydroxypropyl vinyl ether, 2-hydroxypropyl vinyl ether, 4-hydroxybutyl vinyl ether, 3
-Hydroxybutyl vinyl ether, 2-hydroxy-
Examples include 2-methylpropyl vinyl ether, 5-hydroxypentyl vinyl ether, 6-hydroxyhexyl vinyl ether, and ethylene glycol monoallyl ether. Unsaturated ether containing epoxy group! ! [Formula (ii)]
As a specific example, for example, \1 CHz=CH-0-CHz-CHz-0-CHz-CH
-CHz\1 CHz=CH-CHz-0-CHi-CHz-GO-C
Examples include Hz\1. Hydrolyzable silyl group-containing vinyl monomer [formula (ii)]
Specific examples include vinyltrimethoxysilane, vinyltriethoxysilane, vinyldimethoxymethylsilane, allyltrimethoxysilane, allyltriethoxysilane, allyldimethoxymethylsilane, vinyloxypropyltrimethylsiloxysilane, vinyloxyethoxypropyltrimethyl Examples include siloxysilane. The functional group-containing monomers forming the unit (C) may be used alone or in combination of two or more. In addition, examples of the copolymerizable monomer forming the unit (D) include olefins such as ethylene, propylene, and isobutylene; haloolefins such as vinyl chloride and vinylidene chloride; vinyl acetate, vinyl n-butyrate, Carboxylic acid vinyl esters such as vinyl benzoate, p-butyl vinyl benzoate, vinyl pivalate, vinyl 2-ethylhexanoate, and vinyl versatate; carboxylic acid isopropenyl esters such as isopropenyl acetate and isopropenyl propionates. Chain alkyl vinyl ethers such as ethyl vinyl ether, propyl vinyl ether, isopropyl vinyl ether, butyl vinyl ether, tert-7'' thyl vinyl ether, pentyl vinyl ether, hexyl vinyl ether, isohexyl vinyl ether, octyl vinyl ether, 4-methyl-1-pentyl vinyl ether; Fluorovinyl ethers such as pentafluorovinyl ether; cycloalkyl vinyl ethers such as cyclopentyl vinyl ether and cyclohexyl vinyl ether; aryl vinyl ethers such as phenyl vinyl ether and o-1m-1P-tolyl vinyl ether; aralkyl vinyl ethers such as benzyl vinyl ether and phenethyl vinyl ether; styrene; Aromatic vinyl compounds such as vinyl toluene; Allyl carboxylates such as allyl formate, allyl acetate, allyl propionate, m# allyl, allyl caproate, allyl benzoate, allyl cyclohexanecarboxylate, allyl cyclohexylpropionate; Allyl ethers such as ethyl ether and allyl phenyl ether; di- or monoesters and acid anhydrides of unsaturated bond-containing polybasic acids such as fumaric acid and maleic acid; hydroxyethyl acrylate, hydroxyethyl methacrylate, methyl methacrylate, glycidyl Examples include esters of acrylic acid and methacrylic acid such as methacrylate; acrylamides such as acrylamide and N-methylol acrylamide; these monomers may be used alone or in combination of two or more. The fluorine copolymer of the present invention is produced by copolymerizing a monomer mixture of a predetermined ratio in the presence or absence of a solvent using a polymerization initiator, ionizing radiation, etc. as a polymerization initiation source. As the polymerization initiator, a water-soluble one or an oil-soluble one can be used as appropriate depending on the type of polymerization and the type of solvent used as desired. Examples of oil-soluble initiators include azo compounds such as azobisisobutyronitrile and 2,2°-azobis-(2,4-dimethylvaleronitrile); Examples include peroxyester type peroxides such as acetate; dialkyl peroxydicarbonates such as diisopropyl peroxydicarbonate; benzoyl peroxide, and the like. Examples of water-soluble polymerization initiators include redox initiators consisting of persulfates such as potassium persulfate, hydrogen peroxide, or combinations of these with reducing agents such as sodium bisulfite and sodium thiosulfate; Inorganic initiators such as systems in which small amounts of iron, ferrous salts, silver nitrate, etc. coexist; dibasic acid peroxides such as disuccinic acid peroxide, diglutaric acid peroxide, monosuccinic acid peroxide, azobisisobutyramidine dibasic acid Examples include organic initiators such as salts. The amount of these polymerization initiators to be used is appropriately selected depending on the type thereof, copolymerization reaction conditions, etc., but is 0.005 to 5% by weight, preferably 0.005 to 5% by weight, based on the total amount of monomers normally used.
The amount is selected within the range of 0.05 to 0.5% by weight. There are no particular restrictions on the polymerization method, and for example, bulk polymerization, suspension polymerization, emulsion polymerization, solution polymerization, etc. can be used, but from the standpoint of stability of the polymerization reaction, xylene, toluene, Lower alkyl substituted benzenes such as;
Ketones such as methyl isobutyl ketone 1ift-Alcohols such as butanol W4: Esters such as butyl acetate; Solution polymerization using a saturated halogenated hydrocarbon having one or more fluorine atoms as a solvent, emulsion polymerization in an aqueous medium A bulk polymerization method that does not require separation from a solvent is preferably used. (C) When using hydroxyl group-containing unsaturated ethers as the functional group-containing monomer forming the unit, bases such as potassium carbonate or amine compounds should be used for the purpose of producing fluorine-based copolymers with good reproducibility. Addition of sexual substances is effective. Furthermore, there are no particular restrictions on the polymerization format; batchwise,
Either a semi-continuous type or a continuous type can be used. The reaction temperature in the copolymerization reaction is usually -30 to +15
Within the range of 0°C, it is appropriately selected depending on the polymerization initiation source and the type of polymerization medium, usually 0 to 100°C, preferably 10 to
Selected within the range of 90°C. Further, the reaction pressure is not particularly limited, but is usually selected within the range of 1 to 100 kg/cj, preferably 2 to 50 kg/d. Furthermore, the copolymerization reaction can be carried out by adding a suitable chain transfer agent. The product thus obtained has, in the main chain, the formula; -6 alkyl groups, and )\ro-substituted alkyl groups having 1 to 6 carbon atoms, and at least one of them is F. ), more preferably, it has the structure: (wherein P and Q may be the same or different and each represents H, F, CI or CF Formula; H -C-C-CH3 HOCHt -CCHs CH. It has a neopentyl ether unit as an essential component, and preferably has at least one type of structure shown in the following formulas (i) to (iii). It is a fluorine-containing copolymer that also has a functional group. (i) -CH, -CH- \ (CHma) !-0-R'-OH. (In the formula, R4 is an alkylene group having 1 to 6 carbon atoms. and i
represents O or 1, ) (ii) (In the formula, j is 0 or 1, and k represents an integer from 1 to 5.) (ij) -C)It-CB (0) s - (CHz) n -5i-R'\R7 (wherein m and n are 0 or 1, R5, R6 and R7 represent monovalent organic groups, at least one of which has 1 to 6 carbon atoms) ) The molecular weight of the fluorine-containing copolymer of the present invention was measured by gel permeation chromatography (CPC) using tetrahydrofuran as a solvent and monodisperse polystyrene of known molecular weight as a standard substance. The number average molecular weight ('M n ) determined by
00,000, preferably 2,000-1oo, ooo
The glass transition temperature (Tg) is usually -50 to
120"C1 is preferably -10 to 100°C. The fluorine-containing copolymer of the present invention having such a composition, molecular weight, and glass transition temperature is soluble in an organic solvent and compatible with a curing agent. In addition, the cured coating film of a paint containing the copolymer as a main component is glossy, hard, and has excellent weather resistance.In the fluorine-containing copolymer of the present invention, the (C) unit When a hydroxy group-containing unsaturated ether is used as the functional group-containing monomer to be formed, the resulting fluorine-containing copolymer will contain hydroxyl groups as a curing site, and will not be able to be used as a normal thermosetting acrylic. It can be cured by heating using a curing agent used in paints, such as polyvalent isocyanates, blocked polyvalent isocyanates, melamine curing agents, urea resin curing agents, polybasic acid curing agents, etc. The hydroxy group-containing fluorine-containing copolymer can also be cured at room temperature by using polyvalent isocyanates. Examples of the polyvalent isocyanates include non-yellowing diisocyanates such as hexamethylene diisocyanate and isophorone diisocyanate, and addition thereof. Among them, polyvalent incyanates having an isocyanurate ring and having good compatibility with the fluorine-containing copolymer are particularly preferred. When curing at room temperature using a valent incyanate, a known catalyst such as dibutyltin dilaurate can be added to accelerate curing. In the fluorine-containing copolymer of the present invention, (C) units are formed. When using an epoxy group-containing unsaturated ether as a functional group-containing monomer, the obtained fluorine-containing copolymer contains an epoxy group as a curing site,
Polyaddition type curing agents such as polyamines, acid anhydrides, polyphenols, polymercaptans, etc.; catalytic curing agents such as imidazoles, BF, etc. are used as curing agents to perform heat curing or room temperature curing. I can do it. In addition, in the fluorine-containing copolymer of the present invention, when a hydrolyzable silyl group-containing vinyl monomer is used as the functional group-containing monomer forming the unit (C), the obtained fluorine-containing copolymer The polymer contains a hydrolyzable silyl group as a curing site, and can be moisture-cured using an amine compound such as butylamine or a curing catalyst such as dibutyltin dilaurate. Furthermore, the fluorine-containing copolymer of the present invention can be used as a lacquer-type coating material even when it does not contain the (C) unit. The present invention provides the above-mentioned novel fluorine-containing copolymer as well as a fluorine-based paint containing this fluorine-containing copolymer as a main component. can be used. Examples of the solvent include aromatic hydrocarbons such as toluene and xylene. : Alcohols such as n-butanol;
Examples include ketones such as methyl isobutyl ketone; glycol ethers such as ethyl cellosolve; and various commercially available thinners. Solutions obtained by dissolving the fluorine-containing copolymer in these solvents are colorless and transparent. The solution-type paint is prepared by mixing the fluorine-containing copolymer and a solvent using a mixer commonly used for preparing paints, such as a ball mill, Peyton shaker, sand mill, jet mill, three-roll mill, kneader, etc. This can be done by mixing homogeneously using At this time, if desired,
Pigments, dispersion stabilizers, viscosity modifiers, leveling agents, antigelation agents, ultraviolet absorbers, etc. can also be added. (Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples in any way. It should be noted that all percentages in the examples indicate weight percentages, and the abbreviations used are as follows. [Monomers] CTFE: Chlorotrifluoroethylene HBVE: Hydroxybutyl vinyl ether IBVE: Isobutyl vinyl ether NPVE: Pentyl vinyl ether ■ Molecular weights of various resins: Determined from polystyrene standard calibration curves using gel permeability chromatography. (Equipment used)・Apparatus: Shimadzu LC-3A・Column: Tosoh TSKgel G-5000HXL 〃G-4000HXL NG-2000HXL ・Detector: Shimadzu RID-6A ・Data processing: Shimadzu C-R4A ・Carrier: Tetrahydrofuran ■ Glass transition temperature (Tg) of various resins: Measurement was carried out using the following equipment and measurement conditions. (Equipment used) Differential thermal thermogravimetric simultaneous measurement bag W (manufactured by Seiko Electronic Industries ■)
5SC5000DSC200 (measurement conditions) -80→9
0° C. temperature increase (5° C./min) ■ Hydroxyl value: Conducted according to JIS K-0070. ■ Gloss/Flexibility: Measured according to JIS K-5400. (2) Coating film hardness: Measured according to 15O-1522. ■ Weather resistance: Determined in accordance with ASTM G-53. Example 1 7.7 g of potassium carbonate was charged into a stainless steel autoclave with an internal volume of 11 and equipped with a stirrer, and the inside of the autoclave was purged with nitrogen gas three times. Next, NPVE 58g, HBVE 23g. 117 g of CTFE, 1.7 g of t-butyl peroxypivalate, and 231 g of xylene were charged, and the internal temperature was gradually raised to 65°C. After polymerization for 8 hours,
Unreacted CTFE was removed, the autoclave was opened, and the resulting copolymer solution was taken out. After removing potassium carbonate from this copolymer solution by filtration, it was reprecipitated with n-hexane and dried. The yield of copolymer was 220 g. The number average molecular weight of the obtained copolymer was 13.00O, the glass transition temperature was 92°C, and the water #base value was 50■KOH/
It was g. In addition, the composition ratio of this copolymer determined from the results of elemental analysis is CTFE units/NPVE units/HB
The molar ratio of VE units was 50/40/10. Example 2 7.7 g of potassium carbonate was charged into a stainless steel autoclave with an internal volume of 1 liter and equipped with a stirrer, and the inside of the autoclave was purged with nitrogen gas three times. Next, 68g of NPVE and 20g of IBVE. HBVE 23g, CTFE 117g, t-butylperoxypivalate 1.7g, and xylene 22g
8 g was charged, and the internal temperature was gradually raised to 65°C. 8
After polymerization for a certain period of time, unreacted CTFE was removed, the autoclave was opened, and the resulting copolymer solution was taken out. After filtering and removing potassium carbonate from this copolymer solution,
It was reprecipitated with n-hexane and dried. The yield of copolymer was 210 g. The number average molecular weight of the obtained copolymer was 12.000, the glass transition temperature was 75°C, and the hydroxyl value was 501mgK.
OH/g.6 Example 3 7.7 g of potassium carbonate was charged into a stainless steel autoclave with an internal volume of 11 and equipped with a stirrer, and the inside of the autoclave was purged with nitrogen gas three times. Next, NPVE 34g, IBVE 50g, H
23 g of BVE, 117 g of CTFE, 1.7 g of t-butyl peroxyvivalate, and 224 g of xylene.
g was charged, and the internal temperature was gradually raised to 65°C. After 8 hours of polymerization, unreacted CTFE was removed, the autoclave was opened, and the resulting copolymer solution was taken out. After filtering and removing potassium carbonate from this copolymer solution,
It was reprecipitated with n-hexane and dried. The yield of copolymer was 205 g. The number average molecular weight of the obtained copolymer was 12,500, the glass transition temperature was 49°C, the hydroxyl value was 50gKOH
/g. Examples 4 to 6 10 g of each fluorine-containing copolymer obtained in Examples 1 to 3
was dissolved in xylene Log, and as a curing agent "Duraney" TPAJ (manufactured by Asahi Kasei Corporation) was added as NC010H=
After blending each with a ratio of 1/1, xylene was used as a thinner and after adjusting for 15 seconds with Ford Cup #4, the coating was applied. After baking the obtained coating film at 120° C. for 1 hour, the physical properties of the coating film were measured. (Examples 4 to 6) The results are shown in Table 1. Comparative Example 1 7.7 g of potassium carbonate was charged into a stainless steel autoclave with an internal volume of 11 and equipped with a stirrer, and the inside of the autoclave was purged with nitrogen gas three times. Tsuite, IBVE 80
g, 23 g of HBVE, 117 g of CTFE, and 220 g of xylene were charged, and the internal temperature was gradually raised to 65°C. After 8 hours of polymerization, unreacted CTFE was removed, the autoclave was opened, and the resulting copolymer solution was taken out. After filtering and removing potassium carbonate from this copolymer solution,
It was reprecipitated with n-hexane and dried. The yield of copolymer was 192 g. The number average molecular weight of the obtained copolymer was 12,000, the glass transition temperature was 20°C, the hydroxyl value was 52xKOH
/g. Comparative Example 2 The fluorine-containing copolymer obtained in Comparative Example 1 was baked into a film in the same manner as in Examples 4 to 6, and the physical properties of the film were measured. The results are shown in Table 1. As shown in Table 1, the fluorine-containing copolymer of the present invention has a high glass transition temperature, and when used as a coating resin, exhibits excellent coating film transparency and gloss, and also exhibits high coating film transparency and gloss. It has film hardness. (Effects of the Invention) According to the present invention, the fluoroolefin has good solubility in organic solvents, good compatibility with a curing agent, and can be cured at room temperature without being subject to restrictions on the type of fluoroolefin used. A fluorine-containing copolymer can be easily provided. Furthermore, the fluorine-based paint of the present invention containing the fluorine-containing copolymer as a main component can provide a glossy, hard, and weather-resistant coating film under mild conditions. Baking for colored aluminum plates and aluminum sashes is useful as a paint or as an air-drying paint that can be applied on-site. Furthermore, regarding the material of the base material, including metal materials, inorganic materials such as glass and concrete, FRP, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, nylon, acrylic resin, polyester, ethylene-vinyl acetate copolymer,
It is suitably used for coating plastics such as polyvinyl alcohol copolymers, polyvinyl chloride, and polyvinylidene chloride, and organic materials such as wood. The fluorine-based paint is also useful in specific applications such as aluminum swimming pools, exterior colored glass, and cement roofs. (1 other person)

Claims (2)

[Claims] (1) A fluorine-containing copolymer comprising the following (A) and (B) as essential components. (A) Formula: ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(I) (In the formula, V, X, Y, and Z may be the same or different, and each represents H, F, Cl, and the number of carbon atoms. A copolymerized unit of a fluoroolefin, which represents one selected from an alkyl group having 1 to 6 carbon atoms and a halo-substituted alkyl group having 1 to 6 carbon atoms, and at least one of them is F.) :20
~97 mol% (B) Copolymerized unit of neopentyl vinyl ether:
3-80 mol%. (2) A paint whose main component is a fluorine-containing copolymer, which is characterized by containing the following (A) and (B) as essential components. (A) Formula; ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(I) (In the formula, V, X, Y, and Z may be the same or different, and each represents H, F, Cl, and the number of carbon atoms. A copolymerized unit of a fluoroolefin, which represents one selected from an alkyl group having 1 to 6 carbon atoms and a halo-substituted alkyl group having 1 to 6 carbon atoms, and at least one of them is F.) :20
~97 mol% (B) Copolymerized unit of neopentyl vinyl ether:
3-80 mol%.