JP3290406B2 - Emulsion composition for coating glass container and glass container coated with emulsion composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsion composition for coating a glass container such as a glass bottle, and more particularly to an emulsion composition having excellent storage stability and applicability.
Water resistance on the substrate under short-time low-temperature heating or room temperature,
The present invention relates to an emulsion composition for coating a glass container which forms a film having excellent weather resistance and excellent shielding property for a wound, and a glass container coated with the emulsion composition.

[0002]

2. Description of the Related Art Glass containers conventionally used as filling containers for commodities such as beer, soft drinks, milk and coffee are collected from the market after use, washed and repeatedly used. Glass containers used repeatedly in this way, in the bottling step and subsequent distribution process, due to contact between the glass or the glass container and the metal part of the mechanical device, abrasions are generated on the container surface, and as repeated use is repeated The appearance is significantly reduced and the exterior quality is impaired. As a result, the commercial value of the filled contents is reduced. Therefore, it has been proposed to apply a coating composition for a glass container to a glass container in which a scratch has occurred. In this case, coating can be easily performed and a film having required physical properties can be formed at room temperature. Good water resistance Good water resistance No stickiness or slipperiness on the coating surface The coating film is easily and completely peeled off by washing with an alkaline aqueous solution.Do not damage the label attached to the glass container. At the same time, it is required to satisfy requirements such as no deterioration of the coating.
In view of such a point, the present inventor has disclosed Japanese Patent Application Laid-Open No. Hei.
The prior art proposed in Japanese Patent Publication No. 8 (1996) comprises using a composition composed of a specific curable organopolysiloxane and a volatile polydimethylsiloxane as a coating agent, and satisfies the above requirements. is there. The present inventor has also made improvements in this prior art, and
In JP-A-32341 and JP-A-6-32342, a glass container exhibiting good applicability and shielding effect against deep abrasions and abrasions of a colorless transparent glass container, and having excellent releasability with an alkaline aqueous solution. A scratch shielding agent and a glass container in which the abrasion is shielded by the shielding agent are proposed.

[0003]

However, 1) safety during handling 2) simplification of the work (the coating machine can be easily washed with water) 3) problems of environmental hygiene 4) coating due to differences in production lines Due to further demands such as being able to apply a label after the operation, an emulsion-type treatment agent using water as a dispersant is desired. As a prior art of an emulsion type coating agent, a method comprising carnauba wax or dimethyl silicone oil as a main component is known (Japanese Patent Application Laid-Open Nos. 59-102973 and 59-1).
11947, JP-A-55-56040, JP-A-5-56040
No. 7-17863). However, glass bottles that have undergone such treatment are difficult to handle because they are easy to slip, and are liable to adhere to dust and dirt in the air, are easily stained, have insufficient water resistance, have a coating film run off, and have oil when immersed in a water cooler. There are problems such as floating, and further, phenomena such as repelling occur when applied to a substrate because water is used as a dispersion medium. As an improved technique, the present inventor has disclosed in Japanese Patent Application Laid-Open No. 6-9873 a specific silicone resin and a volatile polyorganosiloxane,
We proposed an emulsion composition using a surfactant, but because volatile silicone was used as the dispersant for the base resin, even when the emulsion was used, the product had a flash point and was further coated. There was a problem that the label was peeled off in the step of attaching the label later. The present invention solves the above-mentioned problems, and is a one-pack type emulsion composition using water as a dispersion medium, which has excellent storage stability and coatability, and is coated with a base material and then heated at a low temperature for a short time. Or, at room temperature, to provide a glass container coating emulsion composition and a glass container coated with the emulsion composition, which form a coating having excellent water resistance, weather resistance, and scratch resistance on a substrate. .

[0004]

Means for Solving the Problems As a result of various studies to achieve the above object, the present inventor has found that a one-pack type emulsion composition comprising a combination of a specific siloxane component and water as a dispersion medium, The formed film has an excellent antifouling effect, shields the surface of the base material from deterioration and abrasion caused by natural chemical and physical factors, and has abrasion resistance, gloss retention, weather resistance, and repellency. A film-forming emulsion that can impart water-based properties and improved aesthetics, has little adhesion of dirt, can be easily removed even if dirt adheres, and can protect the original aesthetics of the base material in a beautiful state. The inventors have found that a composition can be provided, and have completed the present invention. That is, the glass container coating emulsion composition of the present invention, the top
And (A) a general formula R ¹ _a Si (OR ² ) _4-a (wherein R ¹ is a monovalent hydrocarbon residue optionally substituted by a halogen atom, and R ² is An alkyl group having 1 to 4 carbon atoms, and
a consists alkoxysilane or partial hydrolyzate 100 parts by weight of the (B) R ^{₃ 3} SiO _1/2 units and SiO _4/2 units represented by a is) integer 0 to 2 (R ³ are monovalent A branched polyorganosiloxane resin having a hydroxyl group bonded to a silicon atom (representing a hydrocarbon group) 50 to 200 parts by weight (C) an alkyl-modified silicone oil 5 to 500 parts by weight (D) having a viscosity at 25 ° C of 50 to 2000 cP Dimethyl silicone oil 2 to 50 parts by weight (E) One or more hydrocarbon solvents and / or volatile silicones and / or mixtures thereof 1000 to 20000 parts by weight (F) Surfactant 1 to 600 parts by weight and (G) It contains 1250 to 60,000 parts by weight of water.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. (A) used in the coating composition of the present invention
The component is an alkoxysilane represented by the general formula R ¹ _a Si (OR ² ) _4-a and / or a partial hydrolyzate thereof. In the coating composition of the present invention, each component is stably dispersed to form a coating film. It is a component for improving adhesion to a substrate and maintaining durability. R ^{1 in the} component (A) is a monovalent hydrocarbon residue which may be substituted with a halogen atom, and may be the same or different. Such a monovalent hydrocarbon residue which may be substituted with a halogen atom includes a methyl group, an ethyl group,
An alkyl group having 1 to 12 carbon atoms such as propyl group, butyl group, amyl group, hexyl group, octyl group, decyl group, dodecyl group; alkenyl group such as vinyl group and allyl group;
An aryl group such as a phenyl group, a tolyl group or a xylyl group; an organosilane such as a monovalent hydrocarbon group such as an aralkyl group such as a β-phenylethyl group or a β-phenylpropyl group; It is a partial hydrolyzate, and among these, a methyl group, an ethyl group, and a propyl group are preferable because they are easily available.

[0006] R ² in the component (A) is a hydrolyzable group. As the hydrolyzable group, an alkoxy group is exemplified, and among these, the odor of by-products generated during the curing reaction is small, and curability and Because of good film properties,
R ² is preferably an alkyl group having 1 to 4 carbon atoms, and a is preferably an integer of 0 to 2, and particularly preferably a methoxy group and an ethoxy group. The partial hydrolyzate of alkoxysilane can be easily obtained by a known method. That is, methyl trialkoxy silane, dimethyl dialkoxy silane, tetraalkoxy silane, phenyl trialkoxy silane, diphenyl dialkoxy silane, alkoxy silanes such as methyl phenyl dialkoxy silane and the alkyl group of the alkyl alkoxy silane ethyl group, propyl group, butyl Alkyl group having 1 to 12 carbon atoms such as a group, amyl group, hexyl group, octyl group, decyl group and dodecyl group; alkenyl group such as a vinyl group and allyl group; aryl such as a tolyl group and a xylyl group One or a mixture thereof selected from organosilicon compounds substituted with a monovalent hydrocarbon group such as a group is appropriately selected and hydrolyzed or partially hydrolyzed in the presence of a catalyst. be able to.

As a catalyst for synthesizing the partial hydrolyzate of the alkoxysilane, organic acids such as acetic anhydride, glacial acetic acid, propionic acid, benzoic acid, formic acid, acetic acid and oxalic acid; tetrabutoxytitanate, tetraisopropoxy Examples thereof include titanates such as titanates; chlorosilanes such as methyltrichlorosilane and dimethyldichlorosilane; inorganic bases such as aqueous ammonia; and organic bases such as ethylenediamine and triethanolamine. Further, as the component (A), the curable polyorganosiloxanes obtained as described above and having different properties may be used as a composite blend.

The component (B) used in the coating composition of the present invention comprises R ³ ₃ SiO _1/2 units and SiO _4/2 units (R ³ represents a monovalent hydrocarbon group). A branched polyorganosiloxane resin having a hydroxyl group bonded to an atom, wherein R ³ is an alkyl group such as methyl, ethyl and propyl; and an alkenyl group such as vinyl and allyl, and is easily synthesized and available. To a methyl group. The ratio of R ³ ₃ SiO _1/2 unit to SiO _4/2 unit is SiO _4/2 unit 1
R ³ ₃ SiO _1/2 unit is 0.5 to 1.3 mol, preferably 0.7 to 1.2 mol, per mol. R ³ ₃ SiO _1/2 unit is 0.5
If the amount is less than mol, the toughness of the coating film is reduced, and if it exceeds 1.3 mol, a sticky feeling is generated, which adversely affects workability and the like. The compounding amount of the branched polyorganosiloxane resin of the component (B) is 50 to 200 parts by weight, preferably 70 to 120 parts by weight, based on 100 parts by weight of the component (A). If the amount is less than 50 parts by weight, the strength of the film is inferior.If the amount is more than 200 parts by weight, the toughness of the film is reduced, which causes cracks and insufficient shielding properties, which is not preferable. .

The component (C) is a component for improving the durability of the coating composition after forming the film and imparting toughness to the film. The alkyl-modified silicone oil used in the present invention has the following average composition formula (1):
Those represented by (2) and (3) are preferred, and the alkyl-modified silicone oil represented by the average composition formulas (1), (2) and (3) is preferably polymethyl hydrogen siloxane or polymethyl hydrogen dimethyl siloxane. It is obtained by adding a hydrocarbon having at least one double bond to a copolymer. These can be synthesized by adding an α-olefin to polymethylhydrogensiloxane or polymethylhydrogendimethylsilicone copolymer by an addition reaction using a platinum catalyst.

[0010]

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Wherein X is an alkyl group having 10 to 90 carbon atoms, and m and n are 25 to 25 of an alkyl-modified silicone oil.
The viscosity at 20 ° C. is an arbitrary integer of 20 to 50,000 cP.) The amount of the alkyl-modified silicone oil of the component (C) is preferably 5 to 50 parts by weight, particularly preferably 100 parts by weight of the component (A). It is 7 to 20 parts by weight. When the amount is less than 5 parts by weight, the durability of the coating film is disadvantageously deteriorated,
If it exceeds 50 parts by weight, the coating film is clouded and a clear surface is not formed, which is not preferable.

The component (D) used in the coating composition of the present invention is dimethyl silicone oil having a viscosity of 50 to 2000 cP at 25 ° C., and is a component for improving workability in the present composition. When the viscosity is less than 50 cP, when forming a film, interference fringes occur, which is not preferable.
If cP is exceeded, smooth application is not achieved at the time of applying the coating agent, resulting in trouble in workability. In addition, 20
If it exceeds 00 cP, in the manufacturing process, after applying,
When sticking a label, the label may be peeled off, which is not preferable. The amount of the dimethyl silicone oil of the component (D) is preferably 2 to 50 parts by weight, particularly preferably 8 to 20 parts by weight, per 100 parts by weight of the component (A). If the amount is less than 2 parts by weight, the slipperiness decreases, and the workability deteriorates. On the other hand, if it exceeds 50 parts by weight, interference fringes occur when the coating is formed, which is not preferable.

The component (E) used in the present invention is a hydrocarbon solvent, a volatile silicone or a mixture thereof, and the volatile silicone represented by the following general formula (I) or (II) Is preferred.

[0014]

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In the volatile polydimethylsiloxane as described above, p having a terminal capped with a trimethylsilyl group is 0 to 0.
9 is a cyclic polydimethylsiloxane or q is a cyclic polydimethylsiloxane having 3 to 8;
Either a linear or cyclic polydimethylsiloxane or a mixture thereof is used in consideration of the solubility of the component and the catalyst component. Among them, it is preferable to use a linear polydimethylsiloxane in which p is 2 to 7 or a cyclic polydimethylsiloxane in which q is 4 or 5. Here, "volatile" means having a vapor pressure that can be measured at room temperature, and the component (E) preferably has a boiling point of 99 to 260 ° C. The amount of the component (E) is 1000 to 20,000 parts by weight, preferably 5000 to 1500 parts by weight, per 100 parts by weight of the component (A).
0 parts by weight. If the amount is less than 1000 parts by weight, the smoothness of the film surface becomes insufficient, and if it is more than 20,000 parts by weight, it becomes difficult to form a film having properties such as sufficient gloss and shielding property.

The surfactant of component (F) used in the present invention includes component (A), component (B), component (C), component (D) and component (E).
There is no particular limitation as long as an emulsion composition is formed by emulsifying and mixing the component (G) and water, and any of nonionic, cationic, anionic, and a mixture thereof may be used. As nonionic surfactants,
Examples thereof include polyoxyethylene alkylphenyl ether, polyoxyethylene alkyl ether, sorbitan fatty acid ester, and polyoxyethylene sorbitan fatty acid ester. In addition, as a cationic surfactant,
Alkyltrimethylammonium salts such as hexadecyltrimethylammonium chloride and octadecyltrimethylammonium chloride; dialkyldimethylammonium salts such as didodecyldimethylammonium chloride, dihexadecyldimethylammonium cumide and dioctadecyldimethylammonium chloride; hexadecyldimethylbenzylammonium And benzylammonium salts such as octadecyldimethylbenzylammonium chloride. Further, as the anionic surfactant, alkyl sulfate,
Examples include alkyl phosphate, sodium polyoxyethylene alkyl phenyl ether sulfate, and the like. The surfactant of the component (F) is used in an amount of 1 to 100 parts by weight of the component (A).
Used up to 600 parts by weight. More specifically, component (A)
When mixing (H) to prepare an emulsion composition,
Component (G) is used as an emulsifier in an amount of 1 to 250 parts by weight, preferably 2 parts by weight.
Used up to 200 parts by weight. The composition further comprises component (F)
By blending the surfactant as a leveling agent, the smoothness at the time of application to a substrate is improved. When the component (F) is used as a leveling agent,
350 parts by weight or less, preferably 100 parts by weight of (A)
Used in 10 to 300 parts by weight. As described above, when the surfactant of the component (F) is blended, an emulsion composition is prepared by first mixing 1 to 250 parts by weight as an emulsifier, and then mixing it with other components, and further adding a leveling agent. When the amount is 350 parts by weight or less, a stable and uniform emulsion can be obtained and the leveling property thereof can be improved.

The water of the component (G) of the present invention is 100% of the component (A).
It is used in an amount of 1250 to 60,000 parts by weight based on parts by weight.

Various additives may be added to the coating composition of the present invention, if necessary. The amount of these additives is not particularly limited as long as the object of the present invention is not impaired. These additives include UV absorbers, antibacterial agents,
Examples include antioxidants.

Various catalyst components may be added to the coating composition of the present invention, if necessary. The amount of the catalyst components is not particularly limited as long as the object of the present invention is not impaired. As the catalyst component, those known as curing catalysts for polyorganosiloxane can be used. Specific examples include tin dioctylate, dibutyltin dilaurate, dibutyltin dioctoate, organic tin compounds such as dioctyltin dilaurate; and organosilicone quaternary ammonium salts. Among these, curability and liquid stability are exemplified. From the viewpoint, dibutyltin dilaurate and dioctyltin dilaurate are particularly preferred.

As a method for applying the emulsion composition for coating a glass container of the present invention to a container, a commonly used method such as spray coating, brush coating, puff coating, and dipping can be used. In addition, a large amount of glass containers, usually such a glass container, is a bottle body having a narrow mouth, and when processing these, for example, a roller-type coating apparatus described in JP-A-58-213654, A coating belt type coating apparatus described in Japanese Patent Publication No. 1-59221 can be used. The thickness of the coating is arbitrary, but from the viewpoint of abrasion shielding effect, balance of tactile sensation, and releasability with an alkaline aqueous solution, it is 0.5 to
About 40 μm is appropriate. Needless to say, the portion to be applied is not limited to the abrasion, but for the purpose of cost reduction, it is also possible to coat only the abrasion so as to have the above film thickness. Further, the emulsion composition for coating a glass container of the present invention does not damage the label even when applied on a label attached to a glass container.

The emulsion composition for coating a glass container of the present invention does not require any special heating for curing.
If the coating is left at room temperature for about 0.5 to 48 hours after coating, a film having no surface tackiness can be easily obtained. However, if necessary, heating may be performed to shorten the curing time.

[0022]

EFFECT OF THE INVENTION The emulsion composition for coating glass containers of the present invention has excellent water repellency and water resistance when applied to a glass substrate and heated at room temperature or for a short time at a low temperature, as well as having excellent abrasion shielding effect. The coating and emulsion composition formed have a tackiness, weather resistance and no tackiness, and the formed coating and emulsion composition do not attack the label surface, and even when the label is applied after coating, the adhesion is maintained. It does not cause a problem in sex. Since the emulsion composition for coating a glass container of the present invention is an emulsion type using water as a dispersion medium, it does not have safety and environmental health problems due to an organic solvent, and has excellent stability despite being an emulsion. And further with respect to the substrate,
It shows good applicability without cissing, shows no slipperiness, does not cause oil floating when immersed, etc., and shows good properties as a shielding agent.

[0023]

The present invention will be described below with reference to examples. Unless otherwise specified, parts in Examples are parts by weight,
% Indicates% by weight, and viscosity indicates a value at 25 ° C. Synthesis Example 1 Methyltrimethoxysilane 1360 was added to a flask equipped with a stirrer, heating jacket, reflux condenser and dropping funnel.
g (10 mol), 200 g of methanol and methyltrichlorosilane were charged so that the hydrochloric acid content became 50 ppm, and 171 g (0.95 mol) of water was gradually dropped with a dropping funnel while stirring. The mixture was kept at a reflux temperature (about 68 to 72 ° C.) for 4 hours to carry out hydrolysis and condensation reactions. After distilling off volatiles under the conditions of normal pressure and 100 ° C, the pressure was gradually reduced to 40 mmHg, 1
Volatile components are further distilled off under reduced pressure at 50 ° C to give a viscosity of 20 cP
630 g (A-1) of silicone was obtained.

Synthesis Example 2 Methyltriethoxysilane was placed in a flask equipped with a stirrer, a heating jacket, a reflux condenser, and a dropping funnel.
2g (0.9mol), dimethyldimethoxysilane 12g (0.1mo
l), 200 g of methanol and 5 g of acetic acid were charged, and 171 g (0.95 mol) of water was gradually added dropwise using a dropping funnel while stirring. Hold at reflux temperature (about 68-72 ° C) for 4 hours,
Hydrolysis and condensation reactions were performed. After removing volatile components under normal pressure and 100 ° C, gradually reduce the pressure to 40 mmHg,
The volatiles were further distilled off under reduced pressure at 150 ° C to give a viscosity of 20
630 g (A-2) of silicone of cP was obtained.

In the examples, the following were used as the branched polyorganosiloxane resin of the component (B). B-1 (CH ₃ ) ₃ SiO _1/2 unit per mole of SiO _4/2 unit
In the examples of the hydroxyl group-containing branched polyorganosiloxane resin composed of both units having a constitution ratio of 0.7 mol, the following were used as the alkyl-modified silicone oil of the component (C).

[0026]

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In the examples, the following dimethyl silicone oil was used as the component (D). D-1 Dimethyl silicone oil having a viscosity of 100 cP at 25 ° C. D-2 Dimethyl silicone oil having a viscosity of 1000 cP at 25 ° C. Preparation Example 1 Synthesis Example 1 was carried out in a flask equipped with a stirrer, a heating jacket, a reflux condenser and a dropping funnel. Obtained silicone resin (A-1): 100 parts by weight, branched polyorganosiloxane resin having a hydroxyl group (B-1): 50 parts by weight, alkyl-modified silicone oil (C-1): 10 parts by weight, dimethyl silicone Oil (D-1): 5 parts by weight, hydrocarbon solvent (IP solvent 1620): 8000 parts by weight, polyoxyethylene nonyl phenyl ether: 5 parts by weight, and stirred at 75 to 80 ° C. It was confirmed that they were uniformly dissolved and dispersed. Then, use a homomixer for 60
The mixture was stirred at 00 rpm, and 12,000 parts by weight of water was gradually added thereto from a dropping funnel, followed by stirring at 50 to 60 ° C. for 30 minutes.
An emulsion composition (S-1) was obtained.

Preparation Example 2 Into a flask equipped with a stirrer, a heating jacket, a reflux condenser, and a dropping funnel, the components shown in Table 1 were charged, and the same operation as in Preparation Example 1 was performed. S-2 to 5) were obtained.

[0029]

[Table 1]

Preparation Example 3 An emulsion composition (P-1) was obtained in the same manner as in Preparation Example 1, except that the silicone resin A-1 was not used. Preparation Example 4 An emulsion composition (P-2) was obtained in the same manner as in Preparation Example 1, except that the silicone resin B-1 was not used. Preparation Example 5 An emulsion composition (P-3) was obtained in the same manner as in Preparation Example 1, except that no alkyl-modified silicone oil was used. Preparation Example 6 An emulsion composition (P-4) was obtained in the same manner as in Preparation Example 1 without using dimethyl silicone oil. Preparation Example 7 An emulsion composition (P-5) was obtained in the same manner as in Preparation Example 1 without using a hydrocarbon solvent, volatile silicone or a mixture thereof.

Examples 1 to 5 and Comparative Examples 1 to 5 Coating agents were prepared with the composition shown in Table 2, and the shielding properties, weather resistance, water repellency, aesthetic appearance, antifouling properties, etc. were evaluated by the following methods. [Preparation of test pieces] ・ Preparation of test specimens <Brown large bottle for beer bottles> Brown large bottles for beer bottles that are used returnably and have scratches on the entire side surface (capacity 633 ml)
) Was prepared, and each coating agent composition was applied thereto such that the coating amount per one was 0.4 g. Immediately after application, these bottles are filled with ice water equivalent to 20% of the contents, and a part of the bottle surface (to a height of about 7 cm from the bottom of the bottle)
Was condensed. Furthermore, it was left for 3 days in an environment of 25 ° C. and 60% RH to obtain a bottle for evaluation. [Shielding Property] The appearance of the test piece was visually observed and evaluated according to the following four grades. ◎: The abrasion part is well shielded, and the transparency of the film is good. ：: Some of the scratches were exposed, but the transparency of the coating was good. Δ: A part of the abrasion was exposed, and the transparency of the coating was slightly poor. ×: Insufficient shielding effect and no transparency of the film. [Water resistance] After running tap water on the test piece for 24 hours, the appearance was visually observed and evaluated according to the following four grades. ◎: The abrasion part is well shielded, and the transparency of the film is good. ：: Some of the scratches were exposed, but the transparency of the coating was good. Δ: A part of the abrasion was exposed, and the transparency of the coating was slightly poor. ×: Insufficient shielding effect and no transparency of the film. [Aesthetics] After the test piece was allowed to stand for 5 months at 25 ° C. and 60% relative humidity, the appearance was visually observed and evaluated according to the following four grades. A: The transparency of the film is good, and dust can be removed by simple wiping. ：: The transparency of the film was good, but some dust adhesion was observed. Δ: The transparency of the film was slightly poor, and some dust adhesion was observed. X: The transparency of the film is poor, and dust adheres. [Anti-fouling property] Sesame oil was applied as a contaminant to a test piece with a brush, and easiness of wiping off with a cloth after leaving for 1 hour was evaluated on the following four scales. ◎: No contaminant material left, good wiping. ：: No contaminated material remains, but some stains remain. Δ: The contaminant on the surface can be removed, but contaminants remain in the details of the scratch. ×: Contaminants remain throughout. [Stability of emulsion composition]
The solution was weighed into a 100 g glass bottle and left in a 60 ° C. constant temperature bath for one month, and the state of the liquid was evaluated according to the following three grades. ◎: No liquid separation. Δ: Partial separation of the liquid was observed, but the mixture became uniform with light stirring. ×: There is separation of the liquid, and the liquid is not uniform even when stirring is performed. [Evaluation of applicability] The applicability of the coating composition at the time of preparing the evaluation bottle was visually observed and evaluated according to the following criteria. A: A uniform film is formed on the surface of the bottle, and no repelling or unevenness occurs. ×: A uniform film was not formed, and repelling and unevenness occurred. <Oil buoyancy> After the evaluation bottle was immersed in water at 20 ° C for 3 days, the surface of the water bath was visually observed and evaluated on a three-point scale according to the following criteria. ：: No oil film was observed. Δ: An oil film is slightly observed. ×: An oil film is remarkably observed on the surface of the water bath. <Bottle washability> A bottle for evaluation was prepared at a liquid temperature of 60 ° C and sodium hydroxide 3
% And 5% of sodium aluminate, and visually observed for the degree of removal of the film after 15 minutes, and evaluated according to the following criteria in three steps. : The coating was almost completely removed. Δ: About half of the film remains. ×: Most of the coating remains.

[0032]

[Table 2]

* 1: Nonylphenyl surfactant (Nikkor OP-5 Nikko Chemicals) * 2: Nonylphenyl surfactant (Nikkor OP-18)
TX Nikko Chemicals) * 3: Sorbitan ester surfactant (Likemar A)
Riken Vitamin Co., Ltd.)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-11-92694 (JP, A) JP-A-58-167449 (JP, A) JP-A-61-6152 (JP, A) 9873 (JP, A) JP-A-3-131548 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C09D 183/04

Claims (3)

(57) [Claims] (A) a compound represented by the following general formula: R ¹ _a Si (OR ² ) _4-a (wherein R ¹ is a monovalent hydrocarbon residue optionally substituted by a halogen atom, and R ² is 4 to 4 alkyl groups, and
a consists alkoxysilane or partial hydrolyzate 100 parts by weight of the (B) R ^{₃ 3} SiO _1/2 units and SiO _4/2 units represented by a is) integer 0 to 2 (R ³ are monovalent A branched polyorganosiloxane resin having a hydroxyl group bonded to a silicon atom (representing a hydrocarbon group) 50 to 200 parts by weight (C) an alkyl-modified silicone oil 5 to 500 parts by weight (D) having a viscosity at 25 ° C of 50 to 2000 cP Dimethyl silicone oil 2 to 50 parts by weight (E) One or more hydrocarbon solvents and / or volatile silicones and / or mixtures thereof 1000 to 20000 parts by weight (F) Surfactant 1 to 600 parts by weight and (G) Contains 1250-60000 parts by weight of water , natural and synthetic
An emulsion composition for coating glass containers that does not contain wax . 2. The emulsion composition for coating glass containers according to claim 1, wherein (C) the alkyl-modified silicone oil is represented by an average composition formula (1) and / or (2) and / or (3). Embedded image (Wherein X is an alkyl group having 10 to 90 carbon atoms, m
, N is an arbitrary integer that makes the viscosity of the alkyl-modified silicone oil at 25 ° C. 20 to 50,000 cP) 3. The method according to claim 1, which is treated with the emulsion composition for coating a glass container according to claim 1, wherein
A glass container characterized in that a film of a film-forming substance comprising a mixture of (C), (D), (E) and (F) is formed on the surface of a glass container.