JPH11130988A - Water-repellent melting road-and carriageway-marking material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a water-repellent material which is excellent in night-time visibility and durabilty by compounding a specified amt. of a thermoplastic silicone resin into the same. SOLUTION: This water-repellent material is prepd. by compounding, based on the total amt. of the material, 1-30 wt.% thermoplastic silicone resin, 8-20 wt.% binder resin selected from among rosin, maleinized rosin, terpene resins, etc., 0.5-5 wt.% plasticizer selected from among vegetable oils, epoxidized oils, mineral oils, etc., 25-65 wt.% filler selected from among a fine calcium carbonate powder, talc, fused alumina, etc., 1.5-7 wt.% coloring pigment, and 10-30 wt.% reflective material (e.g. glass beads) having a particle size of 0.1-3 μm. The thermoplastic silicone resin used is represented by the formula: Rx SiOR4-x (wherein R is 1-4C alkyl such as methyl or butyl; and x is an integer of 0-3), has an alkyl, hydroxyl, carboxyl, or phenyl group or the like at the molecular terminal, and has a softening point of 80-120 deg.C and a contact angle of 90-120 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a water-repellent melting road marking section line material used as a marking line for a lane center line, a lane outside line, a crosswalk, characters, symbols, and the like.

[0002]

2. Description of the Related Art Conventional road marking lane marking materials for lanes include lane boundary lines, lane center lines, lane side lines, pedestrian crossings, characters,
Although used for symbols, etc., since the coating film surface is smooth, the coating film is covered with a water film when wet such as rainfall, the glass beads lose the reflexive reflection characteristics, and are almost invisible to the driver . As a countermeasure against this, various methods have been developed to install convex ribs (hemispherical, trapezoidal, fine irregularities due to coarse aggregates, mixing of dog particle size glass beads, etc.) on the coating film surface,
Has been put to practical use. However, the method of installing convex ribs (in the case of hemispheres and trapezoids) on the surface of the coating film is limited in the type of noise generation (difficult in urban areas) and the type of marking / compartment lines depending on the shape and size of the ribs. (Mainly lane boundary, lane center line, lane outside line), glass beads scattered on the surface of the protruding ribs with time will fall off, reducing visibility (especially during rainy nights), construction It also includes problems such as the necessity of a special construction machine at times and the possibility of re-construction, but the film thickness becomes too thick.

As a method for imparting water repellency to a coating film, it has been proposed to use a silicone resin emulsion, silicone oil, or the like as a part of the material (Japanese Patent Application Laid-Open No. 51-151).
No. 42732, Japanese Unexamined Patent Publication No. 52-139147,
See JP-A-6-25554). However, this method is not preferable because the effect of the silicone resin emulsion and silicone oil moving out of the marking / separation line with the passage of time is reduced, and the properties of the melting material (compression strength, etc.) are reduced depending on the blending amount.

[0004]

The inventions according to the first to third aspects are excellent in night visibility over time, durability (water repellency after abrasion), and visibility as marking lines and division lines. The present invention provides a water-repellent melting road marking section line material.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a water-repellent melting road marking lane material comprising a thermoplastic silicone resin in an amount of 1 to 30% by weight based on the total amount of the material. In the present invention, the thermoplastic silicone resin has a softening point of 80 to 120 in the water-repellent melting road marking lane marking material.
C. and a contact angle of 90 to 120 degrees. The present invention also relates to a water-repellent melting road marking line marking material in which the terminal of the thermoplastic silicone resin is an alkyl group, a hydroxyl group, a carboxyl group, a phenyl group, or the like.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The thermoplastic silicone resin used in the present invention has a softening point of 80 to 120.degree.
It is preferably one having a softening point of 90 to 105 ° C. and a contact angle of 100 to 110 °. If the softening point is too low, when used as a road marking lane marking material, the compressive strength of the material will decrease, and the thermoplastic silicone resin will block during powder mixing production, causing variations in quality and poor dispersion during production. Is more likely to occur. On the other hand, if the softening point is too high, cracks occur at low temperatures, which is not preferable. When the contact angle is less than 90 degrees, the water repellent effect tends to decrease when used for a road marking / compartment line material for melting. When the contact angle exceeds 120 degrees, the water-repellent effect is good, but it is limited from the viewpoint of the structure of the thermoplastic silicone resin. Further, the terminal modification is preferably a treatment with an alkyl group, a hydroxyl group, a carboxyl group, a phenyl group or the like, and a modification with a methyl group is particularly preferable in terms of water repellency. The amount of the thermoplastic silicone resin is preferably 1 to 30% by weight, more preferably 3 to 20% by weight, based on the total amount of the road marking lane marking material. If the amount of the thermoplastic silicone resin is too small, the water-repellent effect is reduced.

The above-mentioned thermoplastic silicone resin is, for example,
Some are manufactured as follows. That is, the general formula (I)

Embedded image (Wherein, R is an alkyl group having 1 to 4 carbon atoms such as a methyl group, an ethyl group, a propyl group, and a butyl group;
A compound represented by the following general formula (I):
Among them, those obtained by reacting a mixture of X 2 and X 3 are preferred.

As components other than the above-mentioned thermoplastic silicone resin of the road marking lane marking material in the present invention, there are a binder resin, a plasticizer, a pigment, a filler, a reflector, an additive and the like. Raw rosin, maleated rosin,
Male rubberized rosin ester resin, petroleum resin, hydrogenated rosin, hydrogenated petroleum resin, terpene resin, polypropylene, polyethylene rubber acetate resin as a rubber rubber elastic resin that includes those containing a mixture alone or the like,
Ethylene ethyl acrylate copolymer resin, styrene butadiene copolymer resin and the like can also be mixed and used. The blending amount is based on the total amount of road marking section line material for melting.
It is preferably from 8 to 20% by weight, particularly preferably from 10 to 16% by weight. If the amount of the binder resin is too small, the drying property and workability are poor. If the amount is too large, the flexibility at low temperatures is poor.

[0009] Examples of the plasticizer include vegetable oil, vegetable oil-modified alkyd resin, mineral oil, epoxidized oil, and liquid synthetic rubbers. The compounding amount is preferably from 0.5 to 5% by weight, particularly preferably from 1 to 4% by weight, based on the total amount of the road marking section line material for melting. If the amount of plasticizer is too small, flexibility at low temperatures,
If workability is poor and too much plasticizer is used, dry cropping and contamination are inferior.

As the filler, fine powder of calcium carbonate,
There are conventionally used ones such as cold water stone, talc, hard aggregate (natural stone, artificial fired aggregate), and fused alumina. The compounding amount is preferably from 25 to 65% by weight, particularly preferably from 30 to 60% by weight, based on the entire amount of the road marking lane marking material. If the amount of the filler is too small, the compressive strength and the abrasion decrease, and if the amount of the filler is too large, the flexibility at low temperatures,
Poor workability.

The white pigments of the color pigments include titanium dioxide, zinc white, lithopone, lead white and the like, and the yellow pigments include yellow lead, heat-resistant yellow lead, organic yellow pigments and the like. The compounding amount is 1.5 to 7% by weight based on the total amount of the road marking division line material for melting.
Is preferred, and particularly preferably 2 to 6% by weight. When the amount of the coloring pigment is too small, the visibility is poor both in the daytime and at night, and when the amount of the coloring pigment is too large, the visibility and the like are good.

As the reflecting material, glass beads are mainly used, and the particle size is 0.1 mm. It is preferably about 1 to 3 mm.
Particles having a particle size of 0.5 to 2 mm are particularly preferred. The reflecting material is preferably blended in an amount of 10 to 30% by weight, particularly preferably 5 to 20% by weight, based on the total amount of the road marking lane marking material. If the particle size of the reflective material is too small, the visibility deteriorates over time, and if the particle size is too large, the visibility is good over time, but the workability of forming the marking lines and the marking lines decreases.
Further, glass cullet (particle diameter: about 0.1 to 3 mm) may be mixed for the purpose of improving the visibility over time. If the amount of the reflecting material is too small, the visibility deteriorates over time, and if the amount of the reflecting material is too large, the visibility is good over time, but the workability of the lane marking / marking line decreases.

In the present invention, additives such as an anti-settling agent, an ultraviolet absorber and a viscosity reducing agent may be added to the road marking lane marking material according to the present invention, if necessary.

In the marking method using the marking line marking material for melting according to the present invention, for example, a ground surface treatment (application of a primer or the like) is performed on a road surface, and then the mixture is subjected to 170-210 in a melting pot.
° C, and can be marked by applying it to a film thickness of about 1.5 mm with a current smoothing marking / separation line construction machine.

[0015]

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples. In the descriptions in the examples, all “parts” mean “parts by mass”.

Embodiment 1

[Table 1]

After the components A to G shown in Table 1 were mixed by a mixer, they were packed in polyethylene bags to obtain a water-repellent melting road marking lane marking material. Next, put it into the on-board kneader,
The mixture was heated and melted at 170 to 200 ° C., and a 1.5 mm-thick and 15 cm-wide smooth marking / compartment line was constructed for 1 km with a construction machine. The coating film was evaluated for nighttime (rainy weather) reflection luminance, durability (water repellency after abrasion), and visibility. The results are shown in Tables 6 and 7.

Embodiment 2

[Table 2]

The components A to G shown in Table 2 were applied under the same conditions as in Example 1, and the evaluation was performed in the same manner. The results are shown in Tables 6 and 7.

Embodiment 3

[Table 3]

The components A to G shown in Table 3 were applied under the same conditions as in Example 1, and the evaluation was performed in the same manner. The results are shown in Tables 6 and 7.

Comparative Example 1

[Table 4]

The components A to F shown in Table 4 were applied under the same conditions as in Example 1, and the evaluation was performed in the same manner. The results are shown in Tables 6 and 7.

Comparative Example 2

[Table 5]

The components A to G shown in Table 5 were applied under the same conditions as in Example 1, and the evaluation was performed in the same manner. The results are shown in Tables 6 and 7.

[0026]

[Table 6]

[0027]

[Table 7]

[0028]

The road marking and lane marking materials according to claims 1 to 3 are excellent in water repellency even in the wet state such as rainfall at the beginning of construction and over time due to the addition of a thermoplastic silicone resin. A visual effect is obtained.

Continuing on the front page (72) Inventor Yuichiro Sakamoto 5--12-15 Namekawa Honcho, Hitachi City, Ibaraki Prefecture Inside the Namerikawa Plant of Tachikasei Kozai Co., Ltd. No. 15 Sun Chemical Co., Ltd. Namerikawa Plant

Claims (3)

[Claims] 1. A road marking section line material for water-repellent melting, comprising a thermoplastic silicone resin in an amount of 1 to 30% by weight based on the total amount of the material. 2. A thermoplastic silicone resin having a softening point of 80 to
The road marking lane marking material for water-repellent melting according to claim 1, which has a contact angle of 120 ° C and a contact angle of 90 to 120 °. 3. The marking line marking material for water-repellent melting according to claim 1, wherein the terminal of the thermoplastic silicone resin is an alkyl group, a hydroxyl group, a carboxyl group, a phenyl group or the like.