JP3477261B2 - Hot melt primer for road marking - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot melt primer for a heat melting type road marking material.

[0002]

2. Description of the Related Art Conventionally, when applying a heat-melting type road marking material, a primer has been applied to the road surface to provide an adhesive effect. As the primer, alkyd resin modified with vegetable oil, synthetic rubber, liquid aromatic petroleum resin (Japanese Patent Publication No.
Resins such as 5-39268) were diluted with an organic solvent (toluene, xylene, ethyl acetate, methanol, trichlene, etc.) (heating residue: about 20 to 30% by weight). In recent years, the mechanization of construction methods has progressed, and the construction speed has increased significantly. Therefore, the conventional primer has problems that it takes a long time for the solvent to volatilize, there is a risk of fire due to the use of a flammable solvent, and it has been a factor that hinders an increase in construction speed. In order to cope with the risk of fire, there is an example in which a non-flammable chlorine-based solvent such as trichlorethylene is used as the solvent. However, this solvent may generate a harmful gas (phosgene) by combustion and cannot be used easily.

[0003]

As a solution to these problems, JP-A-58-52367 describes a primer containing a petroleum resin and a plasticizer and containing almost no organic solvent. However, this primer has a coating temperature as high as 120 to 160 ° C. and has problems such as workability, safety, and high cost of heat insulation equipment. The present invention solves these problems, it can be melt-coated at a low temperature, the construction speed can be increased, the risk of fire can be reduced, labor can be saved during construction, and a road marking hot that exhibits an excellent adhesion effect. A melt primer is provided.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to unsaturated aliphatic compounds.
Liquid hydrocarbon resin 99-92% by weight and liquid polybutadiene
The present invention relates to a road marking hot melt primer containing a tackifying resin (A) consisting of 1 to 8% by weight and a plasticizer (B).

The tackifying resin (A) used in the present invention is mainly composed of a saturated or unsaturated aliphatic liquid hydrocarbon resin consisting of an alicyclic hydrocarbon structural unit and a chain hydrocarbon structural unit. As this aliphatic liquid hydrocarbon resin, 1,3
-Primarily C5 fraction of petroleum, including chain hydrocarbons such as pentadiene, isoprene, 2-methyl-1-butene, 2-methyl-2-butene, alicyclic hydrocarbons such as cyclopentadiene, etc. An oligomer obtained by polymerization using a catalyst such as Krafts catalyst, which is a liquid resin at room temperature,
A resin which is liquid at room temperature and which is obtained by further hydrogenating this is preferable, and a resin obtained by cationically polymerizing a C5 fraction containing 1,3-pentadiene as a main component is particularly preferable. This aliphatic liquid hydrocarbon resin comprises a 6-membered alicyclic hydrocarbon structural unit and a chain hydrocarbon structural unit.

These aliphatic liquid hydrocarbon resins have a number average molecular weight of 100 to 1,000, more preferably 150 to 50.
0 is preferable. From the viewpoint of the viscosity, tackiness, adhesive strength, etc. of the primer, it is preferable to use an unsaturated aliphatic liquid hydrocarbon resin which is not hydrogenated. Examples of these aliphatic liquid hydrocarbon resins include Marca Clear V,
There are commercial products such as L and H (manufactured by Maruzen Petrochemical Co., Ltd.).

In the present invention, in addition to the above aliphatic liquid hydrocarbon resin as the tackifying resin (A), aromatic olefins such as styrene, vinyltoluene, isopropenyltoluene and indene are used to the extent that the effects of the present invention are not impaired. Aromatic petroleum resins such as polymers of petroleum fractions mainly contained, liquid polybutadiene, ethylene copolymer resins (ethylene-vinyl acetate copolymer resins, ethylene-ethyl acrylate copolymer resins, etc.), synthetic rubbers (butadiene rubber, Isoprene rubber, neoprene rubber, etc.) can be used together. When these are used in combination, it is preferable that the content thereof in the tackifying resin (A) is 20% by weight or less, and further 10% by weight or less.

In the present invention, the aliphatic liquid hydrocarbon resin is 100 to 90% by weight, further 99 to 92% by weight, particularly 98 to 95% by weight, and liquid polybutadiene and / or synthetic rubber 0 to 10% by weight, Further, the tackifying resin (A) is composed of 1 to 8% by weight, particularly 2 to 5% by weight.
It is preferable to use since it is possible to further improve the tackiness, stringiness and adhesiveness of the primer.

As the plasticizer (B), paraffinic process oil, naphthenic process oil, vegetable oil, vegetable oil-modified alkyd resin which is liquid at room temperature, xylene resin which is liquid at room temperature,
Examples thereof include epoxidized oil and phthalate esters such as dioctyl phthalate. Naphthenic process oils are preferred from the standpoint of improving the tack and adhesion of the primer. The above components (A) and (B) have a weight ratio of (A) / (B) of 90/10 to 10/90, more preferably 85/15 to 20 /.
It is preferably blended so as to be 80, particularly 70/30 to 50/50. If it exceeds 90/10, the primer coating film tends to be too hard and is likely to be cracked, while if it is less than 10/90, the tack and adhesive strength of the primer tend to decrease.

A flame retardant may be added to the primer of the present invention in order to further improve flame retardancy.
Examples of flame retardants include phosphoric acid esters such as trimethyl phosphate and triethyl phosphate, halogenated phosphoric acid esters such as tris (chloroethyl) phosphate, tris (2-chloropropyl) phosphate, halogens such as polychloroparaffin and chlorinated polyethylene. Paraffin or olefin compound, Sb ₂ O ₃ , Ba (B
Examples include inorganic substances such as O ₃ ) ₂ and Al (OH) ₃ , acids such as tetrachlorophthalic unhydride chloroendo acid, and phosphorus-containing polyols. These alone or 2
Can be used in combination with more than one type.

The hot melt primer of the present invention does not exclude the use of a solvent, but from the viewpoint of eliminating the volatilization time and eliminating the risk of fire, it is preferable that the hot melt primer does not contain a solvent at all. Further, the hot melt primer of the present invention is adjusted so that the melt viscosity at 50 ° C. is 80 to 500 cps, and further 200 to 500 cps.
It is preferable in terms of workability. The hot melt primer of the present invention can be applied by air spray or airless spray. The coating film thickness is preferably 15 to 100 μm. The hot-melt type road marking material can be applied immediately after coating the hot-melt primer of the present invention. The heat-melting type road marking material is not particularly limited, and commonly known materials can be used.

[0012]

EXAMPLES Examples 1-2, Comparative Examples 1-2, and Reference Example 1
~ 3 Primers were prepared by mixing the materials in the formulations shown in Table 1. The saturated aliphatic liquid hydrocarbon resin in Table 1 is Marca Clear L (trade name, manufactured by Maruzen Petrochemical Co., Ltd., polypentane compound (hydrogenated product), iodine value 60 or less, number average molecular weight about 400), unsaturated The aliphatic liquid hydrocarbon resin is Marca Clear V (trade name, manufactured by Maruzen Petrochemical Co., Ltd., polypentene compound, iodine value 220, number average molecular weight about 200), and aromatic petroleum resin is PTR-60 (trade name, Toho Petroleum Resin). Co., Ltd.), naphthenic process oil is Shell Process Oil 375 (trade name, Shell Petrochemical Co., Ltd.), and liquid polybutadiene is M-1000-.
80 (trade name, manufactured by Nippon Petrochemical Co., Ltd.), ethylene-
As the vinyl acetate copolymer resin, EVA # 40 (trade name, manufactured by Mitsui DuPont Polychemical Co., Ltd.) was used. Moreover, the compounding quantity shows a weight part.

[0013]

[Table 1]

Table 2 shows the test results of the primers obtained as described above. The test method is as follows. (1) About 1 g of the heating residue sample is precisely weighed on a 60φ brass petri dish and heated to 135 ° C.
It was expressed as the weight% of the residue relative to the sample when heated for 1 hour. (2) Time until tacking 20 ± 1 μm on a glass plate left in an air-conditioned room at 20 ° C for 1 hour
The time (minutes) until the tack was generated by touching with a finger was expressed by applying a primer melted at 160 ° C. (3) Adhesion 3 g / 150 cm ^{2 of} primer melted at 50 ° C. on concrete road surface in a constant temperature and humidity room at −20 ° C.
Of the heat-melting type road marking material (trade name: Aceline W, manufactured by Hitachi Chemical Co., Ltd.) to a film thickness of 1.5 mm, and then the DuPont impact tester (high It was expressed as the average number of times until peeling using a 50 cm length and a weight of 500 g (five tests were carried out for each example). (4) Combustion test About 10 g of a sample was placed in a 60 φ brass petri dish, and the Bunsen burner was brought close to the fire for 30 seconds, and then the combustion state was examined when the fire source was released. (5) Road test 3g of primer melted at 50 ° C on an open road
/ 150 cm ² and heat-melt type road marking material (trade name Aceline W, manufactured by Hitachi Chemical Co., Ltd.) is melt-coated to a film thickness of 1.5 mm, and then the road marking situation Was observed.

[0015]

[Table 2]

[0016]

EFFECTS OF THE INVENTION The hot-melt primer for road marking according to the present invention can be melt-coated at a low temperature without using a solvent, so that it can reduce the risk of fire and save labor during construction, and tack and bond immediately after coating. Excellent power.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification symbol FI E01F 9/08 E01F 9/08 (72) Inventor Riki Kitamura 4-13-1 Higashimachi, Hitachi-shi, Ibaraki Hitachi Chemical Co., Ltd. Yamazaki In-factory (72) Inventor Yuichiro Sakamoto 4-13-1, Higashi-machi, Hitachi-shi, Ibaraki Hitachi Chemical Co., Ltd. Yamazaki factory (56) Reference JP-A-58-52367 (JP, A) JP-B-55-39268 (JP, B1) (58) Fields surveyed (Int.Cl. ⁷ , DB name) C09J 157/00-157/06 B05D 7/24 301 B05D 7/24 302 C08L 57/02 C09D 5/00 E01F 9 / 08-9/093

Claims (5)

(57) [Claims] 1. An unsaturated aliphatic liquid hydrocarbon resin 99-9.
2 wt% and a tackifier resin (A) as well as hot melt primer road sign comprising a plasticizer (B) comprising a liquid Poributaji ene 1-8 wt%. Wherein the plasticizer (B) is, according to claim 1 Symbol placement of hot melt primer road markings naphthenic process oil. 3. The compounding ratio of the tackifying resin (A) and the plasticizer (B) is 90/10 to 10 by weight ratio of (A) / (B).
/ 90 The hot melt primer for road marking according to claim 1 or 2 . 4. The melt viscosity at 50 ° C. is 80 to 500.
claim 1, 2 or hot melt primer road markings 3 wherein the cps. 5. The method according to claim 1, wherein the solvent is not contained at all.
The hot-melt primer for road marking according to 3 or 4 .