JPH06147502A - Cooker, contaminant preventing cover material and painting method thereof - Google Patents

Abstract

PURPOSE:To easily remove contaminant formed by solidification of juice, oil of food by providing a primary coating layer and a top coating layer formed of cover stuck materials containing special mixtures on a part easily to be with contaminant by cooking in a cooker, and heating to cure it. CONSTITUTION:A primary coating layer containing single materials or a mixture of modified polysiloxane and silicate compounds such as magnesium silicate having a flake structure, flakelike iron oxide metallic pigment, graphite as main ingredients is first provided on a cooker such as a grill 2, a top plate 3, a juice receiver 5, etc., of parts to be easily stuck with contaminant due to cooking of a gas table. A top coating layer containing single materials or a mixture of polysiloxane including a methyl group or methyl group and phenyl group for forming a three-dimensional knitted structure, straight-chain reactive polysiloxane and chloride silicate, flakelike iron metal oxide pigment, graphite similar to the above as main ingredients is provided thereon, and they are heated to be cured to obtain a contaminant resistant film.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION The present invention makes it easy to remove contaminants that are solidified by spilling or spattering food juice or oil when heated and cooked using a gas table, etc.
The present invention relates to a cooking utensil for preventing contamination of the top plate of the utensil, the soup saucer and the inside of the grill, a coating material for preventing the contamination, and a coating method thereof.

2. Description of the Related Art FIG. 1 is a perspective view of a gas table which is an example of a general cooking utensil. Conventionally, a grill portion 2 is arranged in the center of a body 1 and an upper surface is covered with a top plate 3. On the left and right of the top plate 3 are arranged a burner section 7, a soup saucer 5, and a stove section 7 consisting of Gotoku 6. When grilling fish, the grill section 2 is used. I was doing in.

In the gas table, which is an example of the conventional cooking utensil described above, heat resistance and removal of contaminants adhered to the top plate 3 and the soup saucer 5 are taken into consideration, for example, on the surface of stainless steel or metal. Enameled paint or fluororesin-processed (for example, actual development 64-41
No. 804 gazette) is used, but the enamel coating is expensive and has the drawback of increasing the overall weight significantly, and because the surface is made hard, cracks etc. occur when metal objects collide. In addition, the fluororesin-processed ones will peel off the fluororesin if it is rubbed with a resin scrubber, or the heat resistance will be lacking and the heat resistance will gradually deteriorate to reduce the contamination resistance. There are drawbacks such as difficulty in doing so. Recently, stainless steel has become the majority. However, even with this product, it is difficult to remove contaminants, and if you put a pot on the cooking stove 7 and repeat cooking, the juice, oil, soot, etc. from the food will stick to the cooking stove and will not fall off even if wiped off. was there. This is the same with other cooking utensils such as a microwave oven, so that juices and oils from foods stick to the inside of the cooking cabinet and do not fall off even if wiped off. Immediate countermeasures are required.

The present invention has been made to solve the above problems, and is a modified polysiloxane having excellent adhesion to metal and magnesium silicate having a scaly structure, or a silicate compound of aluminum silicate. , A scaly metal iron oxide pigment, a single material of graphite or a coating material containing a mixture thereof as a main component is used as an undercoat layer, and is directly combined with a polysiloxane containing a methyl group or a methyl group and a phenyl group to form a three-dimensional network structure. Heat-cured with a coating material consisting mainly of chain-like reactive polysiloxane and scale-like magnesium silicate, aluminum silicate silicate compound, scale-like iron oxide oxide pigment, single graphite or a mixture thereof as an overcoat layer The grill and top plate of cookware to which dirt is attached by cooking with a heat-resistant and stain-resistant coating with a double structure Juice saucer, it is that has been subjected to the cooking chamber and the like. Heat- and stain-resistant coating coating material consisting of double structure is a thickness selected from modified polysiloxane for undercoat layer and magnesium silicate having scale-like structure, silicate compound of aluminum silicate, scale-like iron oxide oxide pigment, and graphite. 10 μm
Below, it shall be a mixture containing 5 to 50 parts by weight of a scaly substance having an aspect ratio of 0.1 to 15 or a mixture thereof as a main component, and a coloring material and an extender in a ratio of 0 to 40 parts by weight, The overcoat layer is a methyl group 70 to 100 MOL% and a phenyl group 0 to 3 forming a three-dimensional network structure.
50 to 99 parts by weight of a polysiloxane consisting of 0 MOL% or a mixture thereof, and 1 to 20 parts by weight of a linear reactive polysiloxane, magnesium silicate having a scaly structure, a silicate compound of aluminum silicate, and a scale. Metallic iron oxide pigments, graphite having a thickness of 10 μm or less and an aspect ratio of 0.1 to 15 and a scale-like substance alone or 5 to 30 parts by weight of a mixture thereof as a main component. A mixture containing 0 to 60 parts by weight was used. The heat- and stain-resistant coating material having a double structure is coated so that the undercoat layer has a dry film thickness of 3 to 70 μm and the overcoat layer has a dry film thickness of 5 to 80 μm.
Coating was performed by heating and drying at a temperature of 200 to 450 ° C. for 10 to 30 minutes.

[Function] Silica having modified polysiloxane and scaly structure
Magnesium, silicate compounds of aluminum silicate, scales
Iron oxide pigments, graphite single products or their mixtures
To form a three-dimensional network structure with a subbing layer mainly composed of
A methyl group or a group containing a methyl group and a phenyl group.
Resiloxane with linear reactive polysiloxane and scale
Silicate of Magnesium Silicate and Aluminum Silicate with a Structure
Acid salt compound, scale-like metallic iron oxide pigment, graphite alone
Is a coating material containing these mixtures as the main component
Heat- and stain-resistant coating with double structure
The cover is the top plate of the coated appliance, the saucer or
Prevents cracks and improves flexibility in the inside of the rill
It eliminates the sticking of juice and oil that comes out of
Make it permanent.

EXAMPLES Next, the present invention will be described in detail based on examples. FIG. 1 is a perspective view of a gas table to which an embodiment of the present invention is applied, and its structure and operation are as described in the above-mentioned conventional technique, and the description thereof will be omitted. FIG. 2 is a perspective view of a general microwave oven. In the figure, 8 is a body, 9 is a cooking cabinet, and food is cooked in the cooking cabinet 9.
In the present invention, the modified polysiloxane and magnesium silicate and aluminum silicate having a scale-like structure are attached to the surface of the grill portion 2, the top plate 3, the juice receiving tray 5 of FIG. Of the silicate compound, the scale-like metallic iron oxide pigment, the single material of graphite or a mixture thereof as a main component is used as an undercoat layer and contains a methyl group or a methyl group and a phenyl group forming a three-dimensional network structure. Top coat with polysiloxane and linear reactive polysiloxane and scale-like magnesium silicate, aluminum silicate silicate compound, scale-like iron oxide iron pigment, graphite single substance or a mixture containing these as main components. It was constructed by applying a heat-resistant and stain-resistant film coating having a double structure which was heat-cured as a layer. The heat resistant and stain resistant coating material will be described below with reference to the table. Table 1 shows the reasons for using the modified polysiloxane in the basecoat.

[Table 1] The methyl polysiloxane of the undercoat A used in the evaluation of the undercoat layer is, for example, KR-220 manufactured by Shin-Etsu Chemical Co., Ltd., and the methylphenylpolysiloxane of the undercoat B is, for example, a polycomprising 60 MOL% of methyl groups and 40 MOL% of phenyl groups manufactured by Shin-Etsu Chemical. The siloxane KR-282 and the alkyd-modified polysiloxane of the undercoat C are, for example, TSR-1 manufactured by Toshiba Silicone Co., Ltd.
80, the polyester-modified polysiloxane of the undercoat D is TSR-187 manufactured by Toshiba Silicone, and the acrylic-modified polysiloxane of the undercoat E is, for example, TSR-1 manufactured by Toshiba Silicone.
70, TSR-194 manufactured by Toshiba Silicone Co., Ltd. is an epoxy-modified polysiloxane of the undercoat F, and a mixture of magnesium silicate such as Hori Clay Co. and carbon black such as Mitsubishi Kasei Co., Ltd. is mixed and dispersed. Was mixed with carbon black by changing the mixing ratio of the epoxy-modified polysiloxane and magnesium silicate, and the mixture was coated to a thickness of 15 to 20 μm, followed by heat curing at a temperature of 300 ° C. for 15 minutes. Table 2 shows the effect of the scaly pigment on the modified polysiloxane.

[Table 2] Magnesium silicate used for confirming the effect of the scale pigment is, for example, Hori Clay Co., aluminum silicate is, for example, Hori Clay Co., silica powder, for example, Denki Kagaku Kogyo, barium sulfate is Sakai Chemical Co., Ltd., calcium carbonate is Hori Clay Co., scale-like metal oxides are manufactured by Nippon Inorganic Chemical Industry Co., Ltd., and graphite is manufactured by Nippon Graphite Co., Ltd. A mixture of epoxy-modified polysiloxane and carbon black is dispersed in a coating of 15 to 20 μm. It was coated and heat cured at a temperature of 300 ° C. for 15 minutes. Table 3 shows the reasons for using a methyl polysiloxane that forms a three-dimensional network as the topcoat.

[Table 3] The undercoat layer F was used for the evaluation, methyl polysiloxane was, for example, Shin-Etsu Chemical Co., Ltd. KR-220, and methylphenyl polysiloxane was, for example, Shin-Etsu Chemical Co., Ltd. methyl group 60MO.
Polysiloxane KR-282 composed of L% and phenyl group 40 MOL%, epoxy-modified polysiloxane is TSR-194 manufactured by Toshiba Silicone Co., Ltd., polyester-modified polysiloxane is TSR-187 manufactured by Toshiba Silicone Co., Ltd., individually or in a mixture, and magnesium silicate, for example, Hori Clay Co., Ltd. and carbon black, for example, Mitsubishi Kasei Co., Ltd. and linear reactive polysiloxane are reactive dimethyl polysiloxanes such as Toshiba Silicone Co. YF-3800, magnesium silicate and carbon black.
The coating was applied to a thickness of 15 to 20 μm, and heat-cured at a temperature of 300 ° C. for 15 minutes. Table 4 shows the effect of scale pigments on methyl polysiloxane.

[Table 4] The conditions for confirming the effect of the scale pigments in methylpolysiloxane are as follows: Topcoat layer No. 1 is magnesium silicate, No. 9 is aluminum silicate, No. 10 is silica stone powder,
No. 11 is barium sulfate, No. 12 is scale-like metal oxide, No. 13 is graphite, and a mixture of methyl polysiloxane, carbon black and linear reactive polysiloxane is dispersed in each of the individual products, and No. 14 to No. 1
7 is a mixture of carbon black and linear reactive polysiloxane mixed and dispersed in which the mixing ratio of methylpolysiloxane and magnesium silicate is changed, and the undercoat layer F is coated with 5
-10 μm, the overcoat layer was double coated to 5 to 10 μm, and heat-cured at a temperature of 300 ° C. for 15 minutes. Table 5 shows the effect of the linear reactive polysiloxane.

[Table 5] The contamination condition of the evaluation is that a mixed solution of soy sauce and sugar (2: 1) was dropped on the film, heated at each temperature for 1 hour, and the solid contaminants were removed in a good manner. It was removed by rubbing it several times with a scotch scrubbing brush. For the evaluation of the linear reactive polysiloxane, the undercoat layer F was used. For the non-reactive dimethyl polysiloxane, for example, KF-96 manufactured by Shin-Etsu Chemical Co., Ltd., and for the reactive dimethyl polysiloxane, for example, YF3800 manufactured by Toshiba Silicone, non-reacted. The reactive methylphenyl polysiloxane is, for example, TSF437 manufactured by Toshiba Silicone, the reactive methylphenyl polysiloxane is, for example, YF3804 manufactured by Toshiba Silicone, and the amino-modified polysiloxane is, for example, TSF manufactured by Toshiba Silicone.
4700, an epoxy-modified polysiloxane is, for example, YF3965 manufactured by Toshiba Silicone, a polyether-modified polysiloxane is, for example, TSF4440 manufactured by Toshiba Silicone, or an alkyl-modified polysiloxane is, for example, TSF4421 manufactured by Toshiba Silicone, each of which is a three-dimensional network structure. The mixture of methyl polysiloxane, magnesium silicate and carbon black of
The undercoat layer F was doubly coated so as to have a thickness of 5 to 10 μm and the overcoat layer had a thickness of 5 to 10 μm, and heat-cured at a temperature of 300 ° C. for 15 minutes. Table 6 shows the heat curing conditions and the effect of contamination.

[Table 6] The contamination condition of the evaluation is as follows: a mixed solution of soy sauce and sugar (2: 1) is dropped on the film and heated at a temperature of 250 ° C. for 1 hour.
One cycle under the condition that the solidified contaminants are naturally cooled for 1 hour and the neutral detergent is removed with a sponge scrubbing brush,
The test was performed 10 cycles and 50 cycles, and it was judged that the O marks could be taken cleanly and the X marks could not be taken without strong rubbing. In the evaluation of the heat-resistant and stain-resistant coating material, the juice tray 5 of the gas table member was used.
Is double-coated so as to be 5 to 10 μm, and 180 to 4
Heat curing was carried out at a temperature of 80 ° C. for 15 minutes. The polysiloxane alone or a mixture thereof containing a methyl group or a methyl group and a phenyl group forming a three-dimensional network structure used as a heat-resistant coating material in the present invention forms a hard film with little weight loss due to heating, and also has a direct coating. The chain-like reactive polysiloxane has a reactive group at the side chain or at the terminal, or at both ends of the side chain. By combining with methylpolysiloxane or methylphenylpolysiloxane, it has heat resistance and removes contaminants. It can form an easy surface,
As it is, the adhesion to the metal base such as ordinary steel which is an iron material is poor, especially when using a material that is not surface treated,
There was a drawback that the film peeled off due to changes due to heating.
The modified polysiloxane of the undercoat layer is obtained by reacting a hydrogen group or a methoxy group bonded to a silicon atom of a siloxane bond with an alkyd resin, a polyester resin, an acrylic resin or an epoxy resin, and polysiloxane and these A compound obtained by mixing with an organic resin, or methylphenylpolysiloxane in which the organic group bonded to the silicon atom of the siloxane bond is a methyl group or a phenyl group, and is preferable in terms of adhesion to materials and curability. Represents a polysiloxane whose organic group is modified with an epoxy resin. Further, the polysiloxane forming the three-dimensional network structure of the overcoat layer is one in which the organic group bonded to the silicon atom of the siloxane bond is composed of a methyl group and a phenyl group, and preferably all are occupied by a methyl group and a hydroxyl group at the end. The structure has In this way, the organic group is 70% methyl group
As a result of the above, compared to those modified with polysiloxane having 30% or more of phenyl groups, alkyd, epoxy or the like, the loss on heating loss during heating is less, and the smoothness and characteristics of the coating surface are maintained. Furthermore, the smaller the number of organic groups bonded to silicon atoms, the higher the crosslink density, the higher the curability and the higher the film strength, so the organic groups are methyl groups,
It is a methylpolysiloxane with two or three performances. A linear reactive polysiloxane has a reactor at the side chain, terminal or both ends of the side chain, and forms a strong coating on the surface that combines with methyl polysiloxane to facilitate the removal of contaminants. , A characteristic that permanently imparts the anti-contamination property of polysiloxane and the ease of removing the contaminant is obtained. Non-reactive methyl group- or phenyl group-bonded polysiloxanes also have anti-contamination properties and easy removal of contaminants, but only a polysiloxane layer is formed on the surface of the film, and repeated use is possible. As a result, it gradually disengages from the surface layer and cannot withstand long-term use. A single scale-like substance having a thickness of 10 μm or less and an aspect ratio of 0.1 to 15 selected from magnesium silicate having a scale-like structure, a silicate compound of aluminum silicate, a metal oxide pigment, and graphite, or
These mixtures improve the crack resistance and flexibility of the coating and are durable. When the topcoat layer has a color appearance, known materials such as a colorant and a tetrafluoroethylene resin for rubbing prevention can be mixed with the coating material, and by further using a curing agent as an additive, Heat curing at low temperature for a short time can be achieved. This is the same in the undercoat layer, in order to uniformly coat the coating of these non-volatile components, aromatic hydrocarbons, which are volatile components, alcohol, ketone,
Disperse in other organic solvent alone or mixed solvent,
It is applied to the grill part 2, the top plate 3, and the soup saucer 5 which are gas table members so as to have a film thickness after drying of 8 to 150 μm (undercoat layer 3 to 70 μm, topcoat layer 5 to 80 μm), and 200 to 450 after application. 10 to 30 at a temperature of ℃
By heating and curing for minutes, the stickiness of juice and oil from the cooked food was eliminated.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the modified polysiloxane and the magnesium silicate having a scaly structure, the silicate compound of aluminum silicate, and the scaly form are used in the top plate of the cooking utensil, the soup saucer and the inside of the grill. An undercoat layer composed mainly of a metallic iron oxide pigment, a single piece of graphite or a mixture thereof, a polysiloxane containing a methyl group or a methyl group and a phenyl group forming a three-dimensional network structure and a linear reactive poly From a double structure in which siloxane and magnesium silicate having a scaly structure, a silicate compound of aluminum silicate, a scaly metal iron oxide pigment, a single graphite product or a mixture of these as a main component is heat-cured as an overcoat layer. Since it is coated with a heat-resistant and stain-resistant coating, it has the effects of improving the flexibility and adhesion of the coating, preventing cracks, and providing durability. Less sticking of juice and oil exiting from the food, in which it is possible to provide an excellent cookware cleanability.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view of a gas table showing a cooking utensil according to the present invention.

FIG. 2 is a perspective view of a microwave oven showing a cooking utensil according to the present invention.

[Explanation of symbols]

 2 Grill part 3 Top plate 5 Soup saucer 9 Cooking room

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Toyonaga 1109, Shibaide, Kuramochi-cho, Nabari-shi, Mie Prefecture Okitsumo Co., Ltd. (72) Takashi Oie, 1109, Shibaide, Kuramochi-cho, Nabari-shi, Mie Tsumo Co., Ltd.

Claims (3)

[Claims] 1. In a cooking utensil for heating and cooking food such as a gas table, a grill part (2), a top plate (3), a soup saucer (5), and a cooking cabinet (9) to which dirt adheres due to cooking. Modified polysiloxane and scale-like magnesium silicate, aluminum silicate silicate compound,
Scaly metal iron oxide pigments, graphite alone or a coating material mainly composed of a mixture thereof as an undercoat layer, and a polysiloxane containing a methyl group or a methyl group and a phenyl group forming a three-dimensional network structure and a straight chain -Like reactive polysiloxane and scale-like magnesium silicate, aluminum silicate silicate compound, scale-like iron oxide iron pigment, graphite single substance or a coating material containing a mixture thereof as a main component is heat-cured as an overcoat layer. Cookware with heat resistant and stain resistant coating with double structure. 2. An undercoat layer having a double-structured heat and stain resistant coating is a modified polysiloxane and a silicate compound of magnesium silicate or aluminum silicate having a scaly structure.
Flake-shaped metallic iron oxide pigment, thickness selected from graphite 10
It is a mixture containing 5 to 50 parts by weight of a scaly substance having an aspect ratio of 0.1 to 15 and a mixture of 5 to 50 parts by weight as a main component, and a colorant and an extender in a ratio of 0 to 40 parts by weight. The overcoat layer is a methyl group 70-100 MOL% and a phenyl group 0-30 forming a three-dimensional network structure.
50 to 99 parts by weight of a polysiloxane consisting of MOL% or a mixture thereof, and 1 to 20 parts by weight of a linear reactive polysiloxane, magnesium silicate having a scaly structure, a silicate compound of aluminum silicate, and a scale. Metallic iron oxide pigments, graphite having a thickness of 10 μm or less and an aspect ratio of 0.1 to 15 and a scale-like substance alone or 5 to 30 parts by weight of a mixture thereof as a main component. The anti-contamination coating material for cookware according to claim 1, wherein the coating material is a mixture containing 0 to 60 parts by weight. 3. A heat- and stain-resistant coating material having a double structure is applied so that the undercoat layer has a dry film thickness of 3 to 70 μm and the overcoat layer has a dry film thickness of 5 to 80 μm.
The coating method of the cooking utensil according to claim 1 or the anti-contamination coating material of the cooking utensil according to claim 2, characterized by coating by heating and drying at a temperature of 0 to 450 ° C for 10 to 30 minutes.