JPS6131474A - Preparation of solid paint - Google Patents

Abstract

PURPOSE:To produce the titled paint, without using a dispersion process and a dispersion assistant, by charging raw materials of the paint such as a binder resin, undispersed pigment, and if necessary, a solvent, a hardener, etc. in tank, stirring the content under heating, adding a gelling agent under specific condition, and discharging the product from the tank. CONSTITUTION:Raw materials of paint comprising (A) a binder resin, (B) an undispersed pigment, and if necessary, (C) a solvent and (D) a curing agent, etc. are charged to a tank, and stirred under heating. The obtained mixture is added with (E) a gelling agent preferably consisting of a polyhydric alcohol derivative of formula (R and R' are H, Cl, carboxyl, 1-3C alkyl or 1-3C alkoxy; n is 1 or 2) at a temperature capable of keeping the fluid state of the above raw material mixture even after the addition of the gelling agent. The mixture is taken out of the tank in fluid state, and cooled to obtain the objective paint.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing a solid paint that is solid at room temperature.

BACKGROUND ART Conventionally, it has been known to add a gelling agent to a paint that is liquid at room temperature in which pigments have been dispersed at room temperature or under heating to form a solid paint.
No. 3-6659) Problems to be Solved by the Invention However, the conventional solid paint manufacturing method had the following drawbacks in the manufacturing process and the raw materials used.

In other words, when manufacturing, the pigment is first dispersed using a roll mill, ball mill, etc., and then the binder resin, its oil additive, etc. are mixed to produce a liquid paint at room temperature, just like when manufacturing a normal liquid paint. However, a gelling agent is then added to the liquid paint at room temperature or under heating, which requires a step of dispersing the 1M material and a step of manufacturing the liquid paint.

Also, in order to pre-disperse the pigment in the liquid paint,
Originally, it was necessary to use auxiliary agents such as dispersants, wetting agents, and surfactants that were not necessary for the final solid paint product.

Means for Solving the Problems The present invention was developed as a result of intensive research to solve the drawbacks of the conventional solid paint manufacturing method as described above. If the gelling agent is mixed and added at a temperature that allows it to maintain a fluid state even after the gelling agent is added, the process of dispersing the pigment in advance, the process of manufacturing a liquid paint, and the process of dispersing the pigment in advance, as in the conventional method. The present invention was completed based on the discovery that the amounts of various auxiliary agents required for this purpose became unnecessary.

That is, in the production of solid paint, the present invention involves putting various paint raw materials such as binder resin, undispersed pigment, and optionally a solvent and curing agent into a production tank and heating and mixing them with stirring, firstly, the raw materials are transformed into a gel. To provide a method for producing a solid paint, which is characterized in that a gelling agent is added at a temperature at which a fluid state can be maintained even after the gelling agent is added, and then the gelling agent is taken out from a production tank in a fluidized state and cooled.

The present invention will be explained in detail below.

In the manufacturing method of the present invention, first, paint raw materials such as a binder resin, undispersed pigment, solvent, and curing agent are placed in a #forming tank and heated and mixed with W/1 stirring.

Heat mixing is performed to increase the fluidity of the binder resin, to remove wetness of the undispersed pigment, and to uniformly disperse the undispersed pigment in the transparent solid paint, and the heating mixing temperature is Type of binder resin, type of undispersed pigment.

Approximately 40°, although it is selected depending on the presence or absence of solvent blending.
C~120''0 is preferred.

Next, a gelling agent is added to the heated and mixed paint raw materials, but the added charcoal must be at a temperature that allows the raw materials to maintain a fluid state without gelling even after the gelling agent is added.

This temperature varies depending on the type of binder resin used, the type of gelling agent, the combination thereof, the amount of gelling agent added, etc., but is preferably about 80@C to 175'O.

After adding gelation, remove it from the production tank in a fluid state,
By cooling this, the solid paint of the present invention is manufactured.

The binder resin used in the present invention may be one that is used in ordinary paints, and there are no particular restrictions, but typical examples include linseed oil-modified alkyd resin, phenol-modified 7-kid resin, and acrylic-modified alkyd resin. etc., various A/I/Kid resins, acrylic resins, PVC resins, etc.

The pigments used in the present invention include inorganic or organic pigments and extender pigments that are commonly used in paints, including various undispersed pigments such as titanium oxide, Bengara, cyanine blue, and talc.

Furthermore, in the present invention, if necessary, a solvent for dissolving the binder resin, a curing agent for curing the binder resin, etc. paint raw materials such as doefire to help dry the painted film can be used.

Examples of the solvent include minefluterpene, xylene, butyl acetate, ethylene glycol 7-ethyl ether, butanol, methyl isobutyl ketone, etc. Examples of the curing agent include mefmine resin, blocked isocyanate, etc.
Examples of the dryer include metal salts of heptanoic acid, octylic acid, tall oil acid, and the like.

Further, as a gelling agent used in the present invention.

Derivatives of polyhydric alcohols, such as dibenzylidene sorbitol, tripene sorbitol F- and derivatives thereof, and the following structural formulas (wherein, R and R' are different from each other, hydrogen atom, chloride atom,
represents an atom or group selected from the group consisting of a carboxyl group, an alkyl group having 1 to 3 carbon atoms, and an alkoxy group in which the alkyl moiety has 1 to 3 carbon atoms, where n represents an integer of 1 or 2) Polyhydric alcohol derivatives are preferred.

Representative examples of alcohol derivatives represented by the above structural formula include 1,5-benzylidene 2.4-puffmethylbenzylidene sorbitol/l/, 1.5-benzylidene 2.
4 puffethylbenzylidene sorbitol, and 1.3-
Parachlorobenzylidene 2,4-puffmethylbenzylidene sorbitol is mentioned.

The solid paint produced by the method of the present invention is made by blending the paint raw materials as described above, and the blending ratio varies depending on the type of binder resin or gelling agent used, but approximately the binder resin ( 20 to 50 parts by weight of a pigment, 1 to 7 parts by weight of a gelling agent, if necessary, 15 to 45 parts by weight of a solvent, and 0.1 to 7 parts by weight of a dryer are blended to 20 to 65 parts by weight of the solid content.

The present invention will be explained below with reference to Examples.

Example 1 58 parts by weight of ytv*TSV resin (manufactured by AOM65-70HV Shinto Paint ■), 15 parts by weight of turpentine as a solvent, It
Color pigment (product name: Starlet 8LJ Yamashita Color Ball Manufacturing)
12 parts of cobalt naphthenate and 2 parts of cobalt naphthenate were diluted and dissolved to 20% with N-methylpyrrolidone to obtain 255 parts by weight of Radopaint.

Example 2 Phenol-modified alkyd resin (trade name [Benkocy-4
56 parts by weight of 7M-2151J large 8 ink (manufactured by ■),
Solvent μma〃15 parts by weight of butano/I, 10 parts by weight of xylene, 1 each of rust preventive pigment iron oxide yellow #3, and zinc white 1$3
1.6N parts 1 extender pigment, calcium carbonate, clay 6.22 parts by weight each, dryer cobalt octylate, lead naphthenate 0.5 and 1.5 parts by weight each, triethanol
was added, and the temperature was further raised to 120°C to obtain a 20% solution of 20 weight lid paint in which the gelling agent dibenzylidene sorbitol was dissolved in N-methylpyrrolidone by heating at 60°C.

Example 3 After heat mixing acrylic modified alkyd resin (product name: Phthal KV-905J manufactured by Harima Kasei), 5.1 parts by weight of each of cobalt octyate and lead naphthenate were added to a dryer, and the temperature was further raised to 120°C. Example 1: Raised to @O
Drop the gelling agent in the same manner as above, and! l! A white solid paint of acrylic modified alkyd was obtained in accordance with Example Convention 1.

Example 4 Acrylic lacquer was prepared in the same manner as in Example 1 by adding dropwise a gelling agent with 63 parts by weight of acrylic hooker resin (Pa-10 manufactured by Shinto-nuri U-Kuma), xylene as a solvent, and acetic acid in the same manner as in Example 1. Got solid white paint.

Example 5 Enbi-based resin (trade name [Kaneviratsuku L-A8J!1i
iI Fuchi Kagaku ■ Manufactured by 6901L solvent butylacetate 120c
A gelling agent was added dropwise in the same manner as in Example 1 and strained in the same manner as in Example 1 to obtain a vinyl-based white solid paint.

Example 6 Alkyd resin (trade name [Aroputtutu 28X60J
44 parts by weight.

Mehumine resin (product name [Super Beckamine G32l-
6DJ Dainippon Ink■! A gelling agent was added dropwise at 4120° C. in the same manner as in Example 1, and strained once in the same manner as in Example 1 to obtain a baked solid paint of amino alkyd resin white yarn.

Effects of the Invention According to the method of the present invention, in the production of solid paint, by heating and stirring the paint raw materials before solidification, it is possible to omit the mechanical dispersion process and paint forming process required for general paints, and to eliminate these steps. The production process is simplified because additives such as dispersants, warming and humid agents, and surfactants required in the process can be omitted.

This has the effect of reducing production costs and raw material strikes.

Therefore, the conventional method of stirring, heating, and adding a gelling agent to an existing liquid paint had the disadvantage of using steps and raw materials that are unnecessary for solid paint.
Since this point is removed, this method is suitable as a method for producing solid paint.

Claims (1)

[Scope of Claims] 1. When producing solid paint, paint raw materials such as binder resin, undispersed pigment, and optionally solvent and curing agent are put into a production tank, heated and mixed with stirring, and then A method for producing a solid paint, characterized in that the gelling agent is added at a temperature at which the raw material can maintain a fluid state even after the addition of the gelling agent, and then the material is taken out from a production tank in a fluid state and cooled. 2. The gelling agent has the following structural formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (In the formula, R and R' are different from each other, and hydrogen atoms, chlorine atoms,
Represents an atom or group selected from the group consisting of a carboxyl group, an alkyl group having 1 to 3 carbon atoms, and an alkoxy group having 1 to 3 carbon atoms in the alkyl moiety, where n represents an integer of 1 or 2) A method for producing a solid paint according to claim 1, which is a polyhydric alcohol derivative.