Summary of Inorganic Adhesives and Applications (5)

(3) performance. After the glue is cured, it appears slightly shiny iron gray. If it shows green or blue, it indicates that the glue is deteriorating and the strength of the glue will be reduced.

(4) Uses. Suitable for metal bonding, but also for ceramic bonding. For metal cutting tools, measuring tools, mold glue, but also can be used as sand hole pores, casting cracks and other seal trapping and repair. Here are some examples:

1 Glue clamp measuring tools, tools, drill lengthening, patch repair machine tool guide surface and repair engine block.

How to use: The adherend is rusted with iron sand and then washed with solvent acetone or banana water to remove oil and dirt. Use WP-O1 to adjust the glue, take the ratio K = 4 is appropriate. The copper oxide powder was placed on the plate and the center was cratered. Take the phosphoric acid solution injection pits, use a rubber knife from the inside to the clockwise stirring into a paste off, and then repeatedly mix thoroughly, this time with a plastic knife can pull out from the glue on the 1 cm above the wire , you can use it. The adhesive is uniformly applied to the surface of the adherend, and then the two surfaces are attached, slightly twisted or rotated, so that the adhesive surface is in close contact with each other. After removing the surrounding adhesive paste, the adhesive is cured at room temperature. Heating and curing can shorten the bonding time, can significantly improve the bonding strength and resistance to media properties. Heating and curing should be first baked at about 35 °C for 0.5 to 2 hours, and then heated to about 90 °C for about 0.5 to 2 hours, curing can be used completely.

Bonding basic properties: Shear strength, Mpa: socket 120 ~ 130, slot 50 ~ 70, plane 8 ~ 16. Temperature resistance: -180°C～600°C. Good water and oil resistance, poor acid and alkali resistance. Poor conductivity and good airtightness.

Precautions: The glue must be used now, once used up, inconvenient to save. A component such as hygroscopic agglomerate, must be thoroughly dried at 110 °C before use. Adhesive process using socket and mosaic is better.

2 glued refractory equipment, maintenance of refractory equipment

a. How to use it. The surface of the adhered body is rusted, oily and dirty. Use WPP-1 glue, adjust the glue to take K = 2.3 ~ 0.1, mix and stand for 2 ~ 4 hours, you can use. The adhesive is applied to the adhered body, and after appropriate adhesion, squeezing and fixing are performed. If the adherend is a porous material, it should be brushed 1 to 2 times with Part B and then glued. Asbestos fibers and other products should be first immersed in thin glue (K = 1) and then coated with thicker glue (K = 2.6) and glued. Then use gradual heating and curing, 35 ~ 40 °C bake 3h, 60 ~ 65 °C 3h, 80 ~ 85 °C 3h, 100 ~ 105 °C 2h, 120 ~ 125 °C 2h, 140 ~ 145 °C 2h, 180 ~ 185 °C 1.5h , 200 ~ 205 °C 1h. According to the use requirements, the temperature can be increased to 250°C, 300°C, 350°C, 400°C, 500°C and the use temperature. Each section is kept at 0.5h.
b. Post-cure performance of the adhesive layer. It can work for a long time at a temperature of 1500°C, and it can withstand 1700°C for a short time. Fire resistance, acid resistance, oil resistance and aging resistance.

3 Adhesive-bonded multifunctional adhesive tape, aluminum silicate fiberboard, asbestos blanket, high-temperature refractory brick and other refractories and maintenance of high temperature electric furnace, salt bath furnace, three non-reflective furnace and other refractory equipment, can also be used for industrial boiler equipment maintenance, glass products, Marble, ceramics, etc. glued.

a. Method of use, removal of dust on the surface of the adherend; rust and oil stains. Use WKT special inorganic glue with K=2.5 and place it in a tin or plastic container. The glue was applied to the adhered body separately and compounded for proper tamping, squeezing and fixing. Porous materials and asbestos products are treated and glued according to the above example. Curing can be achieved by gradually heating or directly curing at a high temperature (300-900°C).

b. Performance. It can work at 980°C for a long time, and the maximum working temperature can reach 1300°C. It has good thermal strain, fast curing, it can be cured at room temperature, and it can also be heated and cured. After high-temperature curing, it has improved water resistance, oil resistance, medium resistance and aging resistance.

When the tool is quenched and heat treated, the front and rear parts of the tool are often broken. This adhesive is used to stick the multifunctional adhesive tape to the hardened part of the tool for protection. The thickness of the adhesive layer can be 0.5 to 5mm. The multi-component adhesive tape was coated with 1 to 2 parts of the B component and then quenched. The treated tool has different hardness at the front and back and is elastic and not brittle.