JPS60184580A - Adhesive for ceramic molding - Google Patents

Abstract

PURPOSE:To provide the titled adhesive having excellent initial tack and adhesion, by adding a naphthalene derivative, glass flake and ceramic powder to a thermosetting resin. CONSTITUTION:A naphthalene derivative such as an alkylnaphthalene resin, glass flake and ceramic powder are added to a thermosetting resin having a viscosity of 2-6cP, such as epoxy resin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of adhesives for ceramic moldings, and more specifically, the present invention relates to improvements in adhesives for ceramic moldings, and more specifically, the present invention relates to the improvement of adhesives for ceramic moldings, and more particularly, the present invention relates to improvements in adhesives for ceramic moldings (molded block-like single body) to adherends such as metals. Curing clIr+? The present invention relates to an adhesive having improved initial viscosity and adhesive strength using a formulation.

A single block of ceramic molding, which is excellent as an ffl abrasion resistant material that has been in the spotlight in recent years, is applied to the surface of an adherend such as gold (for example, equipment 4a that requires abrasion resistance, such as a hopper). It's starting to stick.

Therefore, conventionally, when adhering single ceramic molded blocks (2), rubber (LA) (vulcanized rubber (1a) or unvulcanized rubber (1a)) of an appropriate thickness was applied to the wear surfaces (3) of various devices.
la)) and a single ceramic molded block (2) adhered to it in the form of a tile, or
First, a rubber lining (1a) is applied to a mild steel plate of an appropriate size prepared separately, and then a ceramic molded metal plate with a single ceramic molded block (2) adhered in the form of a tile is placed on top of the rubber lining (1a) as described above. The most common method was to attach it to the worn part. With this method, the rubber (
Although the elastic effect of rubber (1a) is expected due to the presence of rubber (1a), the present situation is that the properties of rubber (1a) that bend are not utilized at all. Here, as shown in Fig. 1, a single ceramic molded block (2) with a thickness (t) of 5 mm, a width (w) of 50 mm, and a length of 1) 30 mm is used.
Glued itself onto a 31 thick rubber lining (1a), diameter 20IIIo1 length (S) 61cI++, weight fi
When a 1.5 kg mild steel rod (5) was dropped onto it from a height H) of 200 mm, both ceramic molded blocks (2) were destroyed. However, it does not break at higher heights, there is no breakage phenomenon at the adhesive interface, and no decrease in adhesive strength is observed. (See Table 1 for the adhesion test method after impact.) In reality, the impact force absorption effect of rubber (1a) itself is very poor, and when using rubber (1a), has the disadvantage that material costs and processing costs are high, leading to increased costs. To explain in detail from the viewpoint of cost, the reason for the increase in cost is the bonding method when using rubber (1a), and there are generally three methods for this. First, vulcanized rubber (1a)
In this case, it is limited to horizontal metal surfaces only. This is because the circular shape has no glue on the bonding surface, which causes defects in adhesion. In this method, both the metal surface and the vulcanized rubber (1a) are polished with Sangu, and a rubber adhesive is applied to both the metal surface and the vulcanized rubber (1a). The metal (4) and rubber (1a) are bonded together when the solvent is allowed to evaporate naturally and appropriate adhesion occurs. Next, the ceramic molded product (2) and the surface of the lining rubber (1a) are bonded together.

The second method is the same as the first method, but the difference is that the rubber sheet is a raw rubber sheet (naturally vulcanized rubber (LA)).
) and because it is a raw rubber sheet, it has no elasticity.
He has the privilege of being able to pitch for two innings in any shape he wants. However, since the surface of the single ceramic molded product (2) is flat, for example, if the lining surface is circular or spherical, mold raw rubber (1a) of the same shape as the lining surface, and first apply it to the single ceramic molded product (2). After adhesion, it is necessary to perform an operation of adhering it to the rubber lining surface, which greatly increases processing time. The third method is to line an iron plate of an appropriate size (for example, about 5111111 thickness, 300 mII + square to 4001 square) with raw rubber (1a) of an appropriate thickness, and then place the ceramic molded product (2) on top of it. A tile-shaped ceramic block of a metal plate with rubber (1a) interposed is formed by adhering it in a tile shape and pressurizing and heating it with a heat press, or it can be vulcanized in a vulcanization can without using a heat press. Tile-shaped ceramic blocks with metal plates may also be made. In either case, it is necessary to attach this tile-shaped ceramic block with a metal plate to the wear surface (3) of the device, and for this reason, it is necessary to attach the metal plate to the wear surface (3) of the device as well. You will have to prepare for it, and it will work as an increase in costs. The current situation is that the above-mentioned methods 1 to 3 increase not only the material cost but also the processing cost, resulting in a considerable increase in cost. Furthermore, the above-mentioned rubber-based adhesive has a low initial adhesion strength, and for example, when attempting to attach the above-mentioned ceramic molded block (2) to a ceiling surface, it takes a long time to mold the ceramics until the rubber-based adhesive hardens. There was also the drawback that the single object block (2) had to be held, making workability very poor.

The present invention has been made in view of the drawbacks of the prior art, and its purpose is to provide an adhesive for ceramic moldings that has excellent initial adhesive strength and adhesive strength.

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

As a result of research using thermosetting resins, especially epoxy resins, unsaturated polyester resins, vinyl ester resins, etc., we found that these resins have a viscosity of 2 to 6 voids, and that alkylnaphthalenes Resin (rubber processing aid, trade name: Retax) [β-methylnaphthalene is converted into a methylene bridge using a special catalyst with a molecular weight of approximately 600.
This condensed resin improves the processability and plasticity of various polymers. ”) from 4 to 7 Pbr, N Lass 7 Lake (Product name C
F-48-150, Japanese glass am) 30 P b
r, ceramic powder 20 to 80 P l+ r as a main ingredient, a curing agent for the epoxy resin, a curing agent and an accelerator for the unsaturated polyester resin and vinyl ester THMH, and thoroughly knead them to form the adhesive (1). Prepare. The reason why Lath 7 lake and ceramic powder are mixed here is to strengthen the adhesive (1) and suppress fluidity during bonding work, and also to improve heat resistance, chemical resistance,
The purpose is to strengthen the wear resistance and the 0I fat itself. Next, apply this adhesive (1) to a single ceramic molded block (2) or metal (
4) on the adhesive surface (i.e., the worn surface (3)) with a 3 mm thick coating on the front and rear walls (immediately after applying the 11th digit, press the single ceramic molded block (2), this adhesive (1) As shown in Table 1, the initial adhesion is excellent, so the maximum size (2) can be achieved with a single ceramic molded block (2).
Even if you glue a 0+++m thick, 95+o+a square, weight 570F1) to the ceiling upside down, it will not fall, it will stick, and it will harden as it is.

Therefore, it has no effect on any position or curved surface,
For example, in the case of an extremely circular shape, the adhesive (1) can be applied thickly (it has the characteristic that it can significantly reduce processing costs because it eliminates the need for various troublesome operations).

In addition, the material cost of the adhesive (1) of the present invention is not much different from that of the rubber (1a), and the man-hours are as described above, so it can be reduced by about 1,710 yen, and unlike the conventional method. When it comes to a tile-shaped ceramic molded product in which rubber (1a) is interposed on a mild steel plate of excessive size, there is a large difference in processing cost and material cost. However, if you use unsaturated polyester resin, vinyl ester resin, or epoxy resin in the above-mentioned formulation, adhesive (
As mentioned above, when 1) is prepared, the initial adhesion (initial holding force) to the single ceramic molded block (2) is improved, and the adhesion is also greatly improved, but we will continue our research. As a result, it has been found that it is difficult to use epoxy resins only within a certain period of time when workability, that is, productivity is taken into consideration throughout the seasons. That is, since the viscosity of the resin alone needs to be in the range of 2 to 6 voids throughout the year, it is necessary to add the above-mentioned compounding ingredients to prepare an adhesive (1) that can be sufficiently kneaded and has a high adhesive strength. . Epoxy resins in this range include, for example, Meiko Pico 819 (epoxy equivalent: 180 to 220, viscosity 2 to 6 voids, oil-based shell epoxy (
It is necessary to use a commonly used curing agent that is the easiest to use in terms of curing speed, workability, etc., and a low-temperature curing curing agent (for example, triethylenetetramine) with 18 to 22 Pbr added. Prepare it into a putty and add 1 fb of gold.
When (4) is bonded to a single ceramic molded block (2), the most appropriate gel time for adhesive (1) is The optimal conditions are for gelation to occur in about 2 hours after preparation of agent (1), and for the viscosity to increase further and to begin curing, but this curing agent is difficult to cure when the temperature is between 10 and 20 degrees Celsius. If this condition is met and beyond that, the curing time will be too fast, making work difficult and unusable;
By adding and using it, the pot life will be about 2 hours, and it will be difficult to use at other temperatures where work can be done smoothly. Therefore, it is necessary to select a resin whose curing time can be freely controlled in all temperature ranges, and these are unsaturated polyester resins and vinyl ester resins. Among the above-mentioned compounding agents, the curing agent is 1 to 1.
By varying the temperature between 5Phr and 5Phr, it is possible to obtain the most suitable conditions in which gelation begins approximately 2 hours after preparing the adhesive (1). By changing the curing agent and accelerator in the fat within the above-mentioned range, the gelation time can be freely controlled.

As mentioned above, the present invention adds a naphthalene derivative to the thermosetting resin, so the properties of the thermosetting resin can be improved, and the initial adhesive strength and the adhesive strength to ceramics are dramatically improved. , it can be applied directly to metal in the same way as regular adhesives, and individual ceramic molded blocks can be bonded on top of it, greatly reducing the number of man-hours.Furthermore, glass flakes and ceramic powder can be added. This strengthens the stiffness of the adhesive and suppresses the fluidity of the adhesive, which, combined with its excellent initial adhesion strength, ensures no retention even in places where gravity is directly applied, such as on ceilings. Even if no means are used, the ceramic molded block alone will not fall, and ordinary bonding work is sufficient, and the bonding work can be greatly simplified. In addition, thermosetting resin is unsaturated polyester tjj
By using adhesive or vinyl ester resin and varying the amount of accelerator depending on the temperature, it is possible to achieve any desired viscosity, which also has the advantage of allowing adhesive work to proceed without being affected by the surrounding temperature. be.

Example 1, the resin unsaturated polyester resin was an isophthalic acid-based unsaturated polyester resin (trade name Yubika ILC-234, Toyobo #
a Co., Ltd.), vinyl ester resin (product name: Lipoxy 5)
500 (Showa Kobunshi Co., Ltd.) and the epoxy resin (trade name: Ebiko) 891 (Yuka Shell Epoxy Co., Ltd.) are used. The viscosities of these resins range from 2 to 6 poise at 0 to 40'C.

2. Compounding agent 2-1. Alkylnaphthalene resin (trade name: Retax A=rubber processing aid, Obe Sangyo Co., Ltd.) 2-2. ff lath flakes (trade name CF-48 or 150, scaly acid-resistant alkali-containing glass several microns thick, Nippon Insulator Fiber Co., Ltd.) 2-3. Ceramic powder 2-4. Barhook N (Methyl ethyl ketone peroxide 2-56 cobalt heptenoate 6% (Nippon Kagaku Sangyo Co., Ltd.)
) 2-6, TTA () Liethylene Tetramine, Yuka Shell Epoxy Co., Ltd.) 2-7, Polyamide resin (Yuka Shell Epoxy Co., Ltd.) 3. Test method 3-1. Initial adhesion test of a single ceramic molded block. (Fig. ηS3) Apply the adhesive (1) to a thickness (S) (for example, 3 m In thickness) on the lower surface of a mild steel plate (4) with a thickness of 5 to 10 In In, and apply it to a thickness of 20 m + nm! ;r, 95mm square, weight 57
I was able to take a closer look at the single 0g ceramic molded block (2). The test was carried out at the temperature at the time of the experiment, and if the adhesive (1) hardened and the ceramic molded block (2) did not fall, the test was deemed to have passed. (See Appendix Table 1) 3-2 Adhesion test. (See figures 4 to 6) Metal (4)
The adhesive (1) is applied to the worn surface (3) to a thickness (S) (approximately 3 mm thick in the example), and the single ceramic molded block (2) is adhered thereon. Further, hooks were attached to the lower surface of the metal (4) and the upper surface of the single ceramic molded block (2) using instant adhesive, and then the hook (6) was pulled to check the adhesive strength. (See Appendix Table 1) 3-3. Price attack strength.

Thickness (, 3) for example 3t on a 5mm thick mild steel plate (4)
Apply adhesive (1) with a thickness of n In, and then apply 20 m
A single ceramic molded block (2) of m thickness and 95 mm square is pasted, (1) temperature is 5℃, high% 300+om
121 temperature 20℃, height 400m + o111 temperature 30℃
, height j500+nm, diameter 20mm, length 6.00
A mild steel rod (5) of mm was dropped onto the center or corner of the single ceramic molded block (2). (7) in Figure 2 shows the point where it fell.

If it is 70kg/am2 or more in the test listed in Appendix Table 1, it will pass.

3-4. Dell time and adhesion test.

1.5 hours after the completion of the preparation of adhesive (1), regardless of the temperature, it can be confirmed that the viscosity has increased by touch with the fingers or when kneading with a kneading device. If it has increased, the delification test is passed.

(Margin below) Leather I table (J), 1・force'-H)

[Brief explanation of the drawing]

Fig. 1 is a front view of the impact strength test of the present invention, and Fig. j12 is f! of the mild steel frame in Fig. 1. Plan view showing the lower point of the engine, tt
Figure S3 is a front view of the initial adhesion test of the present invention, Figures 4 to 6 are a front view and partially cutaway perspective view of the adhesive strength test of the present invention, and Figure 7 is a ceramic molded block plant according to the present invention. FIG. 2 is a plan view showing the adhesive state of , and (1) is an adhesive. Inventor Maruyama-Ko $ 1 Figure 3 Figure 4 Figure 5 Figure 7

Claims (3)

[Claims] (1) An adhesive for ceramic moldings characterized by adding a naphthalene derivative, glass flakes, and ceramic powder to a thermosetting resin. (2) The ceramic molded article according to claim 1, wherein the thermosetting resin is an epoxy resin, an unsaturated polyester resin, or a vinyl ester resin, and the naphthalene derivative is an alkylnaphthalene resin. glue. (3) The ceramic according to claim 1 or fjS2, characterized in that the thermosetting resin is an unsaturated polyester resin or a vinyl ester resin, and the amount of accelerator is varied depending on the temperature. Adhesive for molded items.