JPH08239629A - Polishing agent composition for tire - Google Patents

Abstract

PURPOSE: To obtain a polishing agent composition which, when merely applied to the surface of a tire, has the effects of keeping its appearance beautiful without detriment to the performances of the rubber and glossing the dull surface of a tire. CONSTITUTION: This composition is prepared by emulsifying natural or/and synthetic waxes, an organosiloxane oil, carbon black, and a polyurethane in water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glazing composition for tires, which imparts aesthetics and luster to the tire surface simply by coating the tire surface.

[0002]

2. Description of the Related Art Tires run under various conditions (dry roads, muddy roads, rain roads, snow roads, etc.), and due to precipitates (antiaging agents, additives, etc.) from inside the tires, tire side worm parts Is significantly impaired in appearance by various contaminants, and it is difficult to put it down only by washing with water and detergent. Conventionally, silicone oil (dimethylpolysiloxane and various modified silicone oils) and resin are used together as a glossing agent on the rubber surface of tires, etc. Solvent type diluted with organic solvent, or silicone oil is emulsified using a surfactant. Aqueous types have been used.

However, the solvent type has excellent initial gloss and luster, but when applied to the surface of the rubber, the solvent penetrates into the rubber to swell the rubber or elute the additives in the rubber to cause the rubber to swell. May deteriorate the physical properties of. The water-based type is excellent for environmental problems and rubber materials, but is not sufficient in terms of luster and luster persistence.

Further, in the conventional polish, since the gloss component is mainly made of a liquid material, it becomes sticky or tacky on the tire surface, and it is good immediately after application, but various stains are attached after running, which adversely affects the appearance. .

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a rubber product for tires and the like, and in particular for automobile tires used under severe conditions, it has a blackish, glossy, durable and non-greasy tire polish composition. The purpose of the present invention is to provide a product, to keep the appearance beautiful for a long time without impairing the performance of rubber just by coating it on the tire surface, and to restore the rubber surface which has lost gloss.

[0006]

Means and Actions for Solving the Problems In order to solve the above problems, the present invention has been achieved as a result of repeated tests and studies on various substances. The present invention comprises the following components (1)-
A glazing composition for tires, characterized in that (4) is emulsified and dispersed in water. (1) Natural or / and synthetic wax (2) Organopolysiloxane oil (3) Carbon black (4) Polyurethane resin That is, the wax film protects the rubber from external factors such as ozone and ultraviolet rays and does not impair the physical properties of the rubber. Also, it has a non-greasy water-repellent film and has excellent stain prevention and redeposition properties. Furthermore, by mixing and using a polyurethane resin, the wax film can be strengthened to improve the peeling prevention of the gloss film, and a gloss component. It was discovered that the silicone oil regulates the penetration of rubber into the inside of the rubber to improve the slippage on the tire surface and facilitate the work during application.

Further, by mixing and using carbon black in the above composition, the hardness of the wax film is increased and recontamination due to stickiness is prevented, the abrasion resistance, the impact resistance and the heat resistance are improved, and the temperature rises during running. It has been found that the durability of the gloss on the tire surface is improved, and that various contaminants are concealed and the appearance is restored even with a thin protective film.

In the present invention, in particular, 5 to 30 wt% of natural or / and synthetic wax, 0.5 to 10 wt% of organopolysiloxane oil, and 0.5 to 10 w of carbon black.
A glazing composition for tires comprising t% and a polyurethane resin of 0.5-10 wt% is preferable. Even if wax, organopolysiloxane oil, carbon black and polyurethane resin are emulsified by using a surfactant, wax, organopolysiloxane oil, carbon black and polyurethane resin are respectively emulsified and dispersed as single component or / and multiple components. You may mix and use what was done.

The wax used in the present invention may be a natural wax or a synthetic wax, and may be used alone or / and a mixture thereof, and its melting point is preferably 60 to 130 ° C. Examples of the wax used in the present invention include natural waxes represented by carnauba wax, candelilla wax, montan wax, ceresin, paraffin, microcrystalline wax, ozokerite, Fischer-Tropsch wax and its derivatives, low molecular weight polyethylene and its derivatives. , Montan wax derivative, paraffin wax derivative, microcrystalline derivative, castor wax, lanolin derivative, wax containing petroleum olefin and maleic anhydride or acrylic acid, or vinyl acetate, higher fatty acid, hydrogenated oil, chlorinated hydrocarbon, fluorine Synthetic waxes such as modified wax, silicone modified wax, and resin modified wax can be used.

When a wax having a melting point of 60 ° C. or lower is used in a tire whose temperature rises, the wax elutes to reduce gloss and stains due to stickiness. When a wax having a melting point of 130 ° C. or higher is used, the glossy coating becomes hard. Causes cracking.

As an aqueous dispersion obtained by emulsifying these waxes, there is used a dispersion obtained by using a wax as a surfactant or neutralizing the acid of the wax with an alkali and dispersing it as soap in water. At this time, a hydrocarbon-based solvent (terpen, kerosene, liquid paraffin, etc.) as a diluent when heating and dissolving the wax, glycols such as ethylene glycol and propylene glycol as an emulsion stabilizer, and alcohols such as ethanol and isopropyl alcohol. The kind can be used as long as it does not deteriorate the performance of rubber.

The polyurethane resin used in the present invention is
A polyurethane product obtained by reacting a polyhydric alcohol and / or a polyvalent amine with a polyvalent isocyanate compound, which has a film-forming property (leaved at room temperature for 1 day and dried at 80 ° C. for 2 days, film thickness: about 0. 3mm) has a tensile strength of 1
50-500 kg / cm ² , elongation: 100-800%,
Minimum film forming temperature: 40 ° C. or lower is preferable. When the physical properties of the film are a tensile strength of 150 kg / cm ² or less, the purpose is not to reinforce the wax film, and the film has strength equivalent to that of the wax film alone. On the other hand, when it is 500 kg / cm ² or more, the coating becomes strong and the hardness increases, causing cracks and peeling.

When the elongation of the film is 100% or less, the elongation of the tire rubber that vibrates in a complicated manner cannot be followed when running and cracks of the gloss film occur, and when it is 800% or more, the film becomes weak and the wax film is not strengthened. Further, the minimum film forming temperature is preferably 40 ° C. or lower in an automobile tire whose temperature rises.

The polyurethane resin can be used regardless of composition as long as it is a polyurethane product having the above-mentioned physical properties of the film, and it can be used regardless of whether it is produced by a self-emulsification method or a forced emulsification method as an aqueous method. Polyurethane resin 20-50
Emulsions containing 100% are easily available, and these can also be used.

The silicone oil used in the present invention is dimethylpolysiloxane and / or epoxy, alkyl,
It is a modified product of amino, carboxyl, alcohol, polyether, etc., and preferably has a viscosity at 25 ° C. of 350 cst or more. At 350 cst or less, the silicone oil is compatible with the wax to plasticize the film and soften the film to cause stickiness. As an aqueous dispersion obtained by emulsifying these silicone oils, a dispersion obtained by dispersing silicone oil in water in the presence of a surfactant is used. Emulsions containing 15 to 60% of these silicone oils are also easily available and can be used.

The carbon black used in the present invention is
Carbon blacks such as channel black, fannes black, acetylene black, lamp black and the like, which are usually used as black pigments for paints, can be used without any particular limitation. The amount used is 0.5-10%, and when it is used, it can be easily obtained by preliminarily dispersing it in 20-70%, and it is convenient to use these.

(1) Wax (2) used in the present invention
The proportions of silicone oil (3) carbon black (4) polyurethane resin are 5-30 wt% and 0.5-, respectively.
10 wt%, 0.5-10 wt%, 0.5-10 wt%
And preferably 8-18 wt%, 1-5 wt%, 1
-5 wt%, 1-8 wt% 14-25 as total solids
It is preferably wt%.

The solid content of (1) is less than 5% or (4)
If the solid content of 10% exceeds 10%, the glossy film becomes a strong continuous film and the film is peeled off due to the components precipitated from the inside of the tire during long-term running, and (1) exceeds 30% or (4) If less than 0.5%, it becomes sticky at high temperature and dirt is apt to be caught.

When (2) is less than 0.5%, the slipperiness on the tire surface during coating and the gloss film formed is poor and the workability is poor.
When it exceeds 10%, stickiness occurs and stains easily occur.

When (3) is less than 0.5%, various concealing properties are inferior to the dirt stains adhered to the tire surface in particular, and black restoration and heat resistance cannot be expected. If it exceeds 10%, the hardness of the coating increases and it cannot adapt to the tire's elongation, resulting in long-term cracking.

Various other components can be mixed and used in the composition of the present invention, and various additives are used for the appearance of the glossy film, the ease of coating, the prevention of deterioration of the film and the material, and the like. These are usually selected from those which are commercially available as a dispersant, an anti-sagging agent, a thickening agent, a leveling agent, an anti-UV agent, an antioxidant, an anti-freezing agent and the like.

[0022]

EXAMPLES, COMPARATIVE EXAMPLES Next, the present invention will be described more specifically by showing Examples and Comparative Examples, but these do not limit the present invention at all. The term "parts" means parts by weight.

Example 1 PED-191EM 45 parts (melting polyethylene wax emulsion: melting point / 120 ° C., solid content / 35%, manufactured by Hoechst) KM-893 6 parts (dimethylpolysiloxane emulsion: viscosity / 5000 cs, solid content / 25) %, Manufactured by Shin-Etsu Chemical) DISPERSE BLACK SD-9020 4 parts (carbon black dispersion: solid content 40%, manufactured by Dainippon Ink) Superflex 750 6 parts (urethane resin emulsion: tensile strength 447 kg / cm ² , elongation 451%, solid content / 45%, minimum film-forming temperature / 4 ° C, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) Ethylene glycol 4 parts Water 35 parts The emulsions described above were weighed and mixed in order, and stirred for 30 minutes to adjust until uniform. .

Example 2 20 parts of oxidized microcrystalline wax (melting point: 82 ° C., acid value: 38, OX-120 manufactured by Nippon Seiro Co., Ltd.), 2 parts of oleic acid, dimethylpolysiloxane (KF9, Shin-Etsu Chemical Co., Ltd.)
6 3000 cs) 2 parts are heated to 100 ° C. to dissolve the wax. 4 parts of morpholine was added to the solution under stirring to homogenize it, and then 55 parts of water heated to 85-90 ° C was added. Three
After cooling to 0-35 ° C, Neotan UE 1100 (urethane resin emulsion: tensile strength 430kg / cm
² , elongation 200%, solid content 35%, minimum film forming temperature
7 parts of 0 ° C. or lower, manufactured by Toagosei Kagaku Co., 6 parts of carbon black dispersion (using Example 1), and 4 parts of ethylene glycol were added and stirred for 30 minutes until uniform.

Example 3 50 parts of Polygen WE3 (emulsion of ethylene and acrylic acid copolymer wax: melting point / 130 ° C., solid content / 25%, manufactured by BASF), KE-9705
(Dimethylpolysiloxane emulsion: viscosity 10,000 c
s, solid content 56%, manufactured by Shin-Etsu Chemical) 4 parts, LUKONY
LE BLACK 0060 (carbon black dispersion: solid content / 30%, manufactured by BASF) 6 parts, Neotan UE
1400 (Urethane resin emulsion: Tensile strength / 2
80 kg / cm ² , elongation / 500%, solid content / 40%,
The minimum film forming temperature of 0 ° C. or lower, 5 parts of Toagosei Chemical Co., Ltd., 5 parts of ethyl alcohol, and 30 parts of water were stirred and adjusted until uniform.

Comparative Example 1 3 parts of the oxidized microcrystalline wax, 2 parts of oleic acid, and 20 parts of dimethylpolysiloxane used in Example 2 were emulsified with 4 parts of morpholine as a morpholine salt of oleic acid in the same manner as in Example 2. Similarly, 7 parts of a urethane resin emulsion, 6 parts of a carbon black dispersion, and 4 parts of ethylene glycol were added and stirred for 30 minutes until uniform to prepare a comparative liquid.

Comparative Example 2 The various emulsions used in Example 3 were used, and the mixing ratio was set to wax emulsion: silicone emulsion: carbon dispersion: urethane resin emulsion: ethyl alcohol: water = 15: 6: 10: 35: 5: A comparative solution was prepared as 29.

Comparative Example 3 A comparative solution was prepared by removing the carbon black dispersion from the composition of Example 3.

The above blended stock solution was applied to a tire using a sponge as an applicator, dried at 25 ° C. for 2 hours, and the following comparative test was conducted. Table 1 shows the results.

Test Method (Glossy Stickiness) The coated surface was touched with a finger to examine the gloss stickiness. ○ No trace remains even if you stroke it with your finger △ There is no stickiness, but some traces remain × Stickiness marks remain (concealment) Crayon (white) is put on the tire and the stock solution is applied with a sponge from above I checked how it looked. ○ Hidden by one application △ Hidden by two applications × Hidden by more than 3 times (water resistance of luster) Rub the coated surface 30 times with a car wash brush soaked in water, and then dry to leave the remaining gloss Examined. ○ There is no big difference from the time of application △ Somewhat thin × No residual gloss (water repellency) The water repelling condition of the application surface after the water resistance test of gloss was examined. ○ Water repellent on all sides △ Water repellent on some sides × Wet on all sides (antifouling property) After applying water to the application surface and drying it, apply water (white) on the tire surface The state of removing the muddy after rubbing three times with a sponge was examined. ○ Something left out △ Slightly left × remaining (bending cracking property) The tire was cut to a size of 3 × 10 cm and applied to the side worm part, and the applied part was bent 90 ° to examine the state of the gloss film. ○ No cracks, cracks, etc. △ No cracks, cracks, etc., but when bent back, the bent part is whitened × Cracks, cracks occur

[0031]

[Table 1]

[0032]

EFFECTS OF THE INVENTION The glazing composition of the present invention has the effects of keeping the appearance beautiful for a long period of time without impairing the performance of the rubber and applying the effect to the restoration of the rubber surface that has lost the luster, simply by applying it to the tire surface.

Claims (5)

[Claims] 1. A glazing composition for a tire, comprising the following components (1)-(4) emulsified and dispersed in water. (1) Natural or / and synthetic wax (2) Organopolysiloxane oil (3) Carbon black (4) Polyurethane resin 2. A natural or / and synthetic wax having a melting point of 6.
The glazing composition for tires according to claim 1, which is in the range of 0 to 130 ° C. 3. The organopolysiloxane oil has a viscosity of 25.
The tire glaze composition according to claim 1 or 2, which has a temperature of 350 cst or more at a temperature of 3 ° C. 4. The polyurethane resin has a tensile strength of 150-
The glazing composition for tires according to any one of claims 1 to 3, which has 500 kg / cm ² , elongation: 100-800%, and minimum film forming temperature: 40 ° C or lower. 5. Natural or / and synthetic wax 5-30w
t%, organopolysiloxane oil 0.5-10 wt%,
Contains 0.5-10 wt% of carbon black and 0.5-10 wt% of polyurethane resin, and its total solid content is 14-2.
The glazing composition for tire according to any one of claims 1 to 4, which is 5 wt%.