JPH0433972A - Glazing composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition, containing fluorinated graphite and suitable for protecting treatment such as surface glazing, water repellent and antifouling treatment by coating the surfaces of automotive bodies, airframe, furniture, business equipment, etc., therewith. CONSTITUTION:The objective composition containing natural wax and/or synthetic wax, fluorinated graphite and preferably further a compound having a perfluoroalkyl group.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a polishing composition, and more specifically, it is applied to the surfaces of automobile bodies, aircraft fuselages, furniture, office supplies, etc., and is used to polish the surfaces, The present invention relates to a polishing composition suitable for protective treatments such as water repellency and stain resistance.

<Prior Art> Conventionally, it has been practiced for a long time to coat the surface of an article and polish it to give it a glossy luster, thereby improving its aesthetic appearance and imparting functions such as water repellency, stain resistance, and water resistance. For example, car waxes applied to painted surfaces of automobiles are well known, and solid, semisolid, and liquid types based on natural or synthetic waxes are known.

A representative polishing composition is disclosed in Japanese Patent Application Laid-Open No. 64-3848.
No. 0 describes a polishing composition containing polytetrafluoroethylene.

<Problems to be Solved by the Invention> However, the coating film of the polishing composition described in the above publication had insufficient water repellency and stain resistance.

<Means for Solving the Problems> Therefore, the present inventors conducted intensive studies to obtain a polishing composition with better water repellency and antifouling properties, and found that fluorinated graphite was used instead of polytetrafluoroethylene. The present inventors have discovered that the polishing composition used provides a coating that is significantly superior in water repellency and stain resistance compared to coatings made from conventional polishing compositions, and has completed the present invention.

That is, the present invention provides a polishing composition further comprising a fluorinated graphite.

The fluorinated graphite according to the present invention is a known substance, and has a structure in which fluorine atoms are present between layers in which six-carbon rings of graphite are two-dimensionally connected.

Fluorinated graphite usually contains 30% of amorphous carbon and fluorine.
It can be obtained by reacting at 0 to 400°C.

As the fluorinated graphite, one with a high fluorination rate is preferable in terms of excellent water repellency and antifouling properties of the coating film and low blackness, and in particular, one with a carbon atom/fluorine atom ratio of 2/1 to 2/1.
A ratio of 1/1 is more preferred, and a ratio of 1/1 is particularly preferred.

Graphite with a carbon atom/fluorine atom ratio of 1/1 is called fluorinated graphite and is represented by the chemical formula (CF), (n is a positive integer), and the bond between CF is a covalent bond, and the CF layer It is a hexagonal compound with a structure in which crystals are stacked at almost equal intervals.

The amount of fluorinated graphite used is not particularly limited, but is 10 to 500 parts by weight per 100 parts by weight of the binder component described below.
Important parts are common.

As will be described later, the amount of fluorinated graphite used is greater than the weight of the binder component (the more it is added, the more water repellent and antifouling properties tend to improve. However, it also imparts excellent durability to the coating film. In this case, it is preferable to appropriately adjust the blending ratio of fluorinated graphite depending on the combination with the selected binder component.

In the present invention, the binder component includes, for example, natural wax and/or synthetic wax, and any conventionally known and commonly used binder components can be used.

Examples of such natural waxes include carnauba wax, candelilla wax, rice wax,
Plant-based waxes such as palm wax and wood wax, animal-based waxes such as beeswax, spermaceti wax, and beef tallow, monk wax, and ceresin wax 1. Mineral waxes such as Osikerite,
Petroleum waxes such as paraffin, microcrystalline wax, and vaseline, and synthetic waxes include, for example, polyethylene L/7 and polypropylene. Silicon-based compounds such as dimethyl silicone oil (dimethylsiloxane), diethyl silicone oil, methylphenyl silicone oil, methylhydrogen silicone oil, amines of polysiloxane, carboxy, epoxy, polyester, phenol can be used in place of or in combination with these. Wax substitutes such as other modified silicone oils such as modified silicone oils, petroleum resins, terpene resins, rosin gums, acrylic resins, silicone resins, resin faces such as tetrafluoroethylene resins, etc. can also be used.

However, it is better to use natural wax and/or synthetic wax in combination with the above-mentioned wax substitute substances, and the polishing effect will be even higher, and a coating film with excellent appearance and durability will be obtained, so it is preferable to use silicone oil in combination. There is a tendency around 1, which improves the rolling properties of water in the coating film.

In the present invention, if it is necessary to obtain a coating film with higher water repellency and antifouling properties, a compound having a perfluoroalkyl group can be used in combination.

As such compounds, any known and commonly used perfluoroalkyl group-containing compounds can be used, but among them, those having a perfluoroalkyl group and having a fluorine atom content of 5 to 80% by weight of the molecular weight, especially 10%. ~70% by weight of compound is preferred.

Particularly suitable perfluoroalkyl group-containing compounds include, for example, perfluoroalkyl group-containing polymers. The perfluoroalkyl group-containing polymer is a polymer of the perfluoroalkyl group-containing monomer alone or a copolymer of the perfluoroalkyl group-containing monomer with a monomer copolymerizable therewith.

As the perfluoroalkyl group-containing monomer, the following can be used, for example.

R2,)7',0OCCR=CI(.

R' R2, SO□NR' 0OCCR= CHzR" Rz , C0NR' 0OCCR= COx Kano Rz, CHzOHCHzooCCR= CHz00
CR' R,,CHz,CFICHz00CCR=CH
zRz, CHzCOOCH King CHzR2, R'
OCR= CHz [However, R2 represents a perfluoroalkyl group having 4 to 21 carbon atoms, R represents hydrogen or a methyl group, R' represents an alkylene group having 1 to 10 carbon atoms, and R# represents hydrogen or a carbon It represents an alkyl group having numbers 1 to 10. ] The monomer to be copolymerized with the perfluoroalkyl group-containing monomer may be any unsaturated compound that can be copolymerized, such as (
(meth)acrylic acid and these (meth)acrylic acids such as methyl, ethyl, propyl, (iso)butyl, hexyl, 2-ethylhexyl, decyl, lauryl, stearyl, β-hydroxyethyl, glycidyl, diethylaminoethyl, etc.
Acrylic esters, styrene, α-methylstyrene,
Styrenic compounds such as p-methylstyrene; vinyl halides or vinylidene compounds such as vinyl fluoride, vinyl chloride, vinyl bromide, vinylidene fluoride, and vinylidene chloride; aliphatic compounds such as vinyl acetate, vinyl caprylate, and vinyl laurate; vinyl esters, aliphatic monoolefins such as ethylene propylene, allyl heptanoate,
Allyl esters such as allyl caprylate and allyl caproate; vinyl alkyl ketones such as vinyl methyl ketone and vinyl ethyl ketone; acrylamides such as acrylamide, N-methylacrylamide, N-methylolacrylamide, methacrylamide, and diacetone acrylamide; Examples include dienes such as isoprene, chloroprene, and butadiene.

As the perfluoroalkyl group-containing polymer, a copolymer of an acrylic acid ester or a styrene compound and a perfluoroalkyl group-containing monomer is preferable, and in particular, the perfluoroalkyl group monomer unit is less than the copolymer weight. 10-70
% by weight is preferred.

Among the perfluoroalkyl group-containing compounds, particularly preferred are the following compounds.

F~2: CF+(CFz)+□CH2CH20C
OCIJztF3: CaF+tSO□N
(CI(3) CHzcHzOcOc (C)13)=
CHz / CH30COC(CH3) =CH2=2
Copolymer F-4 of 71: CF3(Ch), 1cnzcuzococ
n = CH2 (3:6:1 weight ratio mixture of n = 5.7.9)/n-C+sH:+JCOCH=CHz = 3
/2 copolymer F5: CJ+5CONHCHz
CHzOCOCH=CHz/Styrene-1F1 copolymer The amount of the perfluoroalkyl group-containing compound to be used is not particularly limited, but is usually 0.01 to 10 parts by weight, especially 0, per 100 parts by weight of the binder component. When the amount is .05 to 5 parts by weight, it is excellent in terms of water and oil repellency, stain resistance, durability, detergent wash resistance, affinity for organic solvents, elongation during polishing, and gloss. This is particularly preferable.

The polishing composition of the present invention may include polishing agents, surfactants, abrasives, thickeners, dyes, pigments, etc., to impart other properties as necessary or to improve specific properties.
Various known and commonly used additives such as fragrances can be added.

Examples of abrasives include diatomaceous earth, silica, and alumina; thickeners include carboxymethyl cellulose, polyvinyl alcohol, and various alginates of natural rubber; and detergency agents include amines, water, and the like. Examples include sodium oxide and potassium hydroxide.

When formulating the polishing composition of the present invention into a predetermined dosage form, an organic solvent, water, or an emulsifier may be used as a dispersion medium, as necessary, to form an organic solvent-based type or a water-based type. Any polish composition can be prepared.

Organic solvents that can be used in this case are not particularly limited, but include hydrocarbons such as naphtha, naphthene, isoparaffin, kerosene, and mineral spirits;
Carbon tetrachloride, chloroform, halogenated hydrocarbons such as LLI-trichloroethane, trichlorethylene, trifluoroethane, ketones such as methyl ethyl ketone, methyl isobutyl ketone, esters such as ethyl acetate, butyl acetate, turpentine, An example is Tsurupetz, but when polishing, due to drying speed, workability, etc.
Organic solvents with a boiling point in the range of 60 to 230°C are preferred. When preparing a water-based composition, an appropriate amount of a water-soluble emulsifier for dispersing the polishing composition in water may be added as necessary. As the water-soluble emulsifier, any commercially available emulsifier can be used as is, such as anionic surfactants such as alkyl sulfates, alkylbenzene sulfonates, alkyl phosphates and their salts, sorbitan fat F [ester, polyethylene glycol Nonionic surfactants such as fatty acid esters, polyoxyethylene alkyl ethers, cationic surfactants such as polyoxyethylene alkyl amines, alkyl quaternary ammonium salts, amphoteric interfaces such as alkyl betaines, and alkylimidacillins. Examples include activators. Of course, the dispersion medium used in preparation is often appropriately selected depending on the conventionally known polymer.

The polishing composition of the present invention is prepared by uniformly mixing the components as described above with or without heating.

There are no particular limitations on the method of applying the polishing composition of the present invention to a painted surface, and the polishing composition can be applied by a method similar to conventional waxing. For example, the coating is applied to the surface of the article using a sponge or rag, and then polished.

The composition of the present invention can be applied directly to surfaces such as metal, glass, plastics, wood, bamboo, etc., but is preferably applied to surfaces coated on these substrates.

The polishing composition of the present invention has particularly excellent water repellency, water resistance, stain resistance, and durability.
Ideal as a wax for furniture and office supplies.

[Example] Hereinafter, the elongation composition of the present invention will be specifically explained based on Test Examples, Examples, and Comparative Examples.

Hereinafter, "parts" refer to "parts by weight" unless otherwise specified.

-A-Si JIS K 5400 with size 300IIn x 4508
An iron plate painted with white acrylic melamine resin for general automobiles according to the above was used, and the polishing composition of the present invention shown in Table 1 was applied with a sponge, and after air-drying, it was wiped dry with a dry cloth. The gloss and luster of the surface of this iron plate were visually observed and evaluated.

Evaluation criteria ◎: Excellent gloss and shine.

○: Good.

△: Slightly improved.

×2 No improvement effect.

-B i After completion of the above Test A, the contact angle of water on the surface of the iron plate was measured with a goniometer (manufactured by Elmer Optical Co., Ltd., microscope for contact angle measurement). The larger the value of the contact angle, the better the water repellency.

-Ci After completing Test B, the iron plate was immersed in water at 25°C for 48 hours, air-dried, and the water repellency of the surface was measured in the same manner as Test B. The water repellency was compared with that before immersion in water.

Evaluation criteria ◎: Maintained 90 to 100% of water repellency before immersion in water.

O: Maintained below 80-90%.

Δ: Maintained less than 60-80%.

×: 60% or less.

-D'- After completion of Test A, the contact angle of n-dodecane on the surface of the iron plate was measured in the same manner as Test B. The larger the value of the contact angle, the better the oil repellency.

-E method - 1 part of carbon black powder was impregnated with 0.1 part of lubricating oil, and this was poured into 99 parts of water that was being vigorously stirred and dispersed. This dispersion liquid IM1 was placed on the surface of the iron plate after the completion of Test A, and after being air-dried overnight, the degree of remaining dirt was visually observed after wiping it off with a dry cloth.

Evaluation criteria ◎: No dirt remains at all.

O: Slight stain remains.

△: Some dirt remains.

×: Considerable dirt remains.

The results of the above tests A to E are also shown in Table 1.

The polishing composition of Example 3 had better water droplet rolling properties than that of Example 1.

, Kuko Note: Rate 1) Acrylic resin manufactured by Dainippon Ink and Chemicals.

Ratio 2) C/F=1/1 (atomic ratio), average particle size 1μ
m white powder. Specific gravity 2.45 $3) C/F=4/3 (atomic ratio), average particle size 0.
8μm white-gray powder. Specific gravity: 2.45 *4) Polytetrafluoroethylene with an average molecular weight of 5,000.

Book 5) Polyoxyethylene nonyl phenyl ether manufactured by Daiichi Kogyo Seiyaku ■. (HLB=14) *6) Perfluoroalkyl alcohol ethylene oxide adduct manufactured by Dainippon Ink & Chemicals ■.

*7) Petroleum-based solvent manufactured by Esso.

Example 9 The polishing composition of Example 6 of the present invention was applied to an unpainted steel plate and a glass plate, air-dried, and then wiped with a dry cloth. Thereafter, the water contact angle on the plate surface was measured in the same manner as Test B.

The water contact angle of unpainted steel plate is 138°, and that of glass plate is 1
It was 41°.

Example 10 After thoroughly cleaning the surface of an ordinary automobile (painted white) with a scrubber, the polishing composition of Example 6 and a commercially available solid wax were applied to the right and left sides, respectively, and the surfaces were air-dried and wiped off. After driving as is for one month, the vehicle was washed with water and visually observed for the amount of dirt remaining and the extent of limescale. This car was driven for another month, and after washing with water, the amount of dirt remaining and the degree of limescale formation were visually observed.

These observation results were combined to evaluate durability.

The right side coated with the polishing composition of Example 6 of the present invention was extremely durable, whereas the left side was extremely poor in durability.

〔Effect of the invention〕

Since the polishing composition of the present invention uses fluorinated graphite, it has extremely superior water repellency and stain resistance compared to coatings of conventional polishing compositions using polytetrafluoroethylene. A coating is obtained.

Therefore, the composition of the present invention can be used not only for conventional purposes, but also for shoe and bag polishes, shoe polishes, floor polishes that require high water repellency and stain resistance, vehicle waxes, etc.
It is particularly useful as an aircraft wax.

Claims (1)

[Scope of Claims] 1. A polishing composition characterized by containing fluorinated graphite. 2. A polishing composition consisting of natural wax and/or synthetic wax and fluorinated graphite. 3. The composition according to claim 2, further comprising a compound having a perfluoroalkyl group.