JPS63132981A - Coating composition for producing crack - Google Patents

Abstract

PURPOSE:To obtain the titled composition, which is a novel material for works of art for forming the same network pattern as that of crack form, consisting of a specific water-soluble high polymer, specific fine inorganic particles and water and having a constant viscosity. CONSTITUTION:A composition, obtained by blending (A) 10-30wt% water-soluble high polymer, e.g. gum arabic, dextrin, etc., having <=1,000cP viscosity of a 30wt% aqueous solution at 20 deg.C with (B) 1-10wt% fine inorganic particles having a spherical particle shape and 0.01-4.0mum average particle size, e.g. silicic acid anhydride, aluminum silicate, etc., and (C) 60-80wt% water and having 100-1,000cP viscosity at 20 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a coating composition that causes cracking in the underlying synthetic resin III coating. For more details, see Paper and Pottery 1! When a synthetic resin emulsilane is applied to a surface and dried, it shrinks and causes cracks in the underlying synthetic resin film, causing cracks in the coating itself. Leap. The application is to apply a coloring agent such as oil-based paint or oil painting P to the cracks that have occurred in the dry film of this composition and allow it to penetrate, forming a net [1-shaped pattern] that is the same as the shape of the crack, and forming a coating. The dried *1kM of the composition is washed with water and removed to create a 6-inch painting or a machel of ancient pottery with an old color, providing Mlu materials for works of art.

So-called forgeries, in which new paintings and pottery are sold at high prices to make them appear to be old works, have been practiced since the distant past. This method involves repeating rapid heating and cooling for each painting. In the case of pottery, there seems to have been a technique to bury it in the soil over a long period of time, but the details are unknown because it was marked with a top secret R.

1ffl 1lfi that invention tries to solve! L This invention is an extremely electric type method, and also has an extremely short M 1
111 creates a material for old paintings and old pottery, and provides new techniques for 11 artistic works.

This invention is a first step for solving the problem of water-soluble polymers having a viscosity of 309.9% water-soluble polymer at 20°C of 10 to 30%.
Fl! The shape of the particles is spherical and the average particle type is 0.0.
Inorganic fine particles 1-1 (consisting of 1% by weight and 60-89% water, viscosity of 100-IO゛0ocps at 20IC) are dried to form a base of 11gtT skin. Problem E was solved by providing a coating composition that

Function: The composition of this invention is a synthetic resin skin made by applying synthetic vAWi emulsilane as a F base to the surface of paper, ceramics, etc. and drying it!
In! II When drying after applying cloth,! Water-soluble polymers that exhibit low viscosity even in high aqueous solutions in the composition form a film that shrinks and generates cracks on its own, and also causes cracks in the base and synthetic resin film. In addition, the spherical inorganic fine particles dispersed at this time weaken the film-forming properties of the water-soluble polymer, causing cracks and crumbling, and furthermore, the water-soluble polymer -f.
The film cracked by 15% [after applying 1 to 6 colorants and letting it see through]
: Facilitates removal of dried composition by washing with water.

Examples The water-soluble polymers used in this invention, which have a viscosity of 1000 t: ps at 20°C of the 30% violet water-soluble oil, include gum arabic and dextrin.

Polymerized starch, water-soluble gelatin, etc. can be used, and preferred examples of water-soluble polymers include gum arabic and dextrin. , the shrinkage caused by the flame is used to create cracks in the base, and the film is then easily removed by washing with water.

This water-soluble polymer is used in an amount of 10 to 30 parts per $100 parts by weight (hereinafter mg is referred to as 9 parts).

Preferably, 13 to 25 FJ can be used. If the amount of water-soluble polymer is 30 parts or more, the film will be too strong and will not cause cracks, and if it is less than 10 parts, the film will be too weak and the nail shape will not be maintained, or even if cracks occur, the cracks will not be removed. and the depth is small.

The diameter of the particles used in this invention is 0. As the inorganic fine particles which are spherical in O2N2゜0μ theory, 111FI particles such as calcium carbonate, clay, talc, kaolin, silicic anhydride, aluminum silicate, etc. and alI-free particles such as glass powder can be used, preferably silicic anhydride particles. , aluminum silicate is an example.

Spherical inorganic Ii particles weaken the film-forming properties of water-soluble polymers and tend to cause cracks, but non-spherical fine particles cannot be used in this invention because they have the effect of inhibiting cracks.

First of all, if the particle size of the Il-free grains t is large, sparse cracks can be obtained, and if it is small, small and dense cracks can be obtained.

Also, if the particle size of the fine particles is larger than 4.0 μm, the composition may be applied until it dries (if the particles precipitate and cause cracks, or if the cracks are too large and spoil the aesthetic appearance), the Il of 0. If it is smaller than 0.01 μm, the cracks will be too small to be effective.

These am-free grains range from 1.0 to 1.0 per liter of composition +00/l.
101'l, preferably 1.5-7. OM can be used. If the amount is more than 1 part, the film will become weak, the width and depth of the cracks will become smaller, and the leveling of the composition will become worse. 1. If the amount is less than oM, the film will be strong and will be difficult to crack.

Also used in this invention! ! The refractive index of 1 minute particle is water W
If the refractive index is the same as that of the bamboo molecule, ** will be transparent, and the painting or mark on the ground will be clearly visible, which is desirable.

In this invention, in order to improve adhesion to the base, 11L I
A nonionic surfactant or an anionic surfactant having an I of 10 or higher can be used if necessary. Also, preservatives such as phenol or silicone resin.

Antifoaming agents such as amyl alcohol can also be used.

In this invention, 60 to 89N water is added to the above ingredients.
II compound acid.

149 compositions with this invention! To do this, add 4 water-soluble molecules and the corresponding additives to the water, and
Stir at 0-90'C for 2 hours to dissolve. Then, if necessary, it is filtered and used as a color vehicle. Next, inorganic fine particles are added to the color vehicle and uniformly dispersed using a dispersion device such as a death bar or a 3-line n-lar.

Next, specific examples will be shown to further clarify the invention.

Example 1 Water 7]
Add gum arabic 23s and stir at 80°C for 2 hours to dissolve and filter to obtain a single color agent. To this colorant, 6 parts of Tokusil N (crystal name, manufactured by Tokuyama YYA, average particle size of water-containing silicon)
0.02~0.03μm) and operated with a desper for 30 minutes to completely disperse it, resulting in a viscosity of 580cp at 20@C.
*, a composition was obtained.

Apply vinyl acetate emulsion on the tile.

<1 2 g of this composition was applied onto the dried 11100 cm' surface, and upon drying, cracks with a maximum width of 15 mm were formed.

Example 2 Water 731
1! Te*suL! J N102 20 mCI+
1 Chemical, -ry#! Dextrin) Fine Seal E-507 part (trade name, vXyamaffi!chi, amorphous silica.

According to Example 11, the viscosity at 20°C is 560 cps,
III product acid.

Apply acrylic emulsion to Ghent paper, F.

Apply this composition TG to the dried synthetic 4 [100 cm] skin and smoke it to a width of about 3 mm.
cracks occurred.

″
1 Arabica Gono, 18 parts Thyroid 255 10 parts (trade name, manufactured by Fuji Davison Chemical, amorphous silica, average particle size 3.3 μm) Based on the actual kfi41, the viscosity at 20°C is 220
cps, a composition was obtained.

When this composition is applied to fs1 and Ra, the width is about 5 mm.
cracks occurred.

Example 4 Water 78
M-deki x)! Jn102 171'! Tokushir N
Based on 5 parts, the viscosity at 20°C was 470 cp according to Example 1.
A composition was obtained.

When this composition is applied in the same manner as in Example 2, the width is about 10 mm.
The result was 1fN11 of 1fN11.

Example 5 Water 73
24 parts of water-soluble gelatin U (product name: Nitta Gelatin Tomo, hydrolyze regular gelatin to 5,000 to 100 liters of water-soluble gelatin U)
0000 ce! lIl arranged,) talc t, sy-'
A composition having a viscosity at 20"C of 510 cps was obtained from the 20 to 20 part according to Example 1. When this composition was applied in the same manner as in Example 1, a crack with a width of about 5 mm was cut.

Effects of the Invention The composition of this invention is applied to the surfaces of cardboard, board 1 synthetic resin board, ceramics, etc. #acid vinyl emulsion I resin, acrylic emulsion 1
Apply emulsion, such as lint, etc., dry it, apply it to 4-layer LtS tree Iat leather shoes 1, and let it dry to see if there are any cracks! Shishiru.

These cracks appear in both the water-soluble tS molecular film formed after the composition dries and the synthetic vA coating, and the cracks in both cases appear at -1 at the coincident position t11. After that, if you apply n coloring agent such as oil paint or oil painting P, the @coloring agent will penetrate into the cracks. Wipe off the excess colorant that has adhered to the R surface, and then wash the film of this composition with water to remove it. In the case of composite ll1liI plates, and pottery, it produces matiere of 6 pottery, and exhibits a new and unique effect.

Regarding the effect of cracks, the larger the particle size of the non-aia particles that are included as a component of the composition, the larger the cracks will be.
The smaller the crack, the smaller the crack. Also, if the composition is applied thickly, the cracks will become large, and if the composition is applied thickly, the cracks will become small.

The size of the crack is determined not only by the composition of the composition, but also by the material of the base material.For example, if the base material is a permeable material such as cardboard or board, the synthetic resin II layer coating should be thick. It is also necessary to use synthetic trees! lIN! ! It is necessary for the material to have appropriate flexibility, and for this purpose it is desirable to add an appropriate amount of plasticizer.

Claims (1)

[Claims] The viscosity of a 30% by weight aqueous solution at 20°C is 1000 cp
s. It consists of 10 to 30% by weight of a water-soluble polymer having the following properties, 1 to 10% by weight of inorganic fine particles having a spherical shape and an average particle diameter of 0.01 to 4.0 μm, and 60 to 89% by weight of water at 20°C. The viscosity at 100 to 1000 cps.
A coating composition that causes cracks in the underlying synthetic resin film layer when dried.