Method for processing high-hardness phenolic resin glue used for surface of building template
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A technology of phenolic resin glue and processing method, applied in the direction of coating, etc., can solve the problems of reducing the service life of building templates, large amount of sticky mud on the surface of the template, and foaming of the template due to water inflow, etc. The effect of reducing the amount of slime and ensuring smoothness
Inactive Publication Date: 2014-09-10
开县汇森木材加工厂
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However, after the waterproof coating material (including paint, urine glue, melamine glue, etc.) used on the surface of the existing formwork is solidified to form a waterproof layer, the hardness is low, and it is easy to be "scratched" during use, making the surface become Rough, resulting in a large amount of mud on the surface of the formwork after the formwork is removed, and it is easy to be "wear through", resulting in the impossibility of waterproofing, causing the formwork to enter water and foaming, which greatly reduces the service life of the building formwork
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Embodiment 1
[0013] Embodiment 1, the processing method of the high-hardness phenolic resin glue used on the surface of the building template of this embodiment includes the following steps:
[0014] a. Take the following weights: 580kg of phenol, 2050kg of formaldehyde, 130kg of caustic soda, and 270kg of water;
[0015] b. Pour all the phenol taken in step a into the reaction tank, then pour the caustic soda and water into the reaction tank at the same time, fully stir, and heat up reaction occurs, add step a to the reaction tank at a temperature between 40°C and 42°C 3 / 4 of the formaldehyde taken in the slab, continue to heat up automatically after evenly stirring;
[0016] c. When the temperature in the temperature reaction tank rises above 90°C, add the remaining 1 / 4 formaldehyde, stir thoroughly, and let it stand for 10-15 minutes at a constant temperature;
[0017] d. Finally, let it cool down naturally at room temperature.
Embodiment 2
[0018] In Example 2, the production process is the same as that in Example 1, except that the weight of the raw materials in step a is different, specifically: phenol 620 kg, formaldehyde 1900 kg, caustic soda 150 kg, and water 240 kg.
Embodiment 3
[0019] In Example 3, the production process is the same as that in Example 1, except that the weight of the raw materials in step a is different, specifically: 600 kg of phenol, 2050 kg of formaldehyde, 140 kg of caustic soda, and 260 kg of water.
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Abstract
The invention discloses a method for processing high-hardness phenolic resin glue used for the surface of a building template, which takes phenol, formaldehyde, caustic soda and water as raw materials and is prepared by automatic heating reaction according to the preset proportion; after being cured, the phenolic resin glue prepared by the method is higher in hardness; and after the phenolic resin glue is coated on the surface of the building template, the building template is good in water resistance and is not easily scratched and worn, so that the smoothness of the surface of the building template is guaranteed, and the slime content can be reduced after a mould is removed. Experiments prove that compared with the common urea glue waterproof coating or other waterproof coatings, the building template coated by the phenolic resin glue prepared by the method prolongs the service life by 3-5 times, reduces the surface slime content by more than 2 / 3 after the mould is removed, and is excellent in combination property and high in practicality.
Description
Technical field [0001] The invention relates to the field of chemical engineering, in particular to a processing method of phenolic resin glue used for the surface waterproof layer of building concrete formwork. Background technique [0002] As a common building material in the field of modern construction, building templates are mainly evaluated by two indicators: waterproof performance and the amount of mud on the surface after mold removal. The surface of the existing building formwork generally adopts a waterproof layer such as painting, so as to achieve the purpose of waterproofing. At the same time, the smoothness of the formwork surface is also improved to reduce the amount of mud on the surface of the formwork after mold removal. However, after the waterproof coating materials (including paint, urinary glue, triamine glue, etc.) used on the surface of the existing template solidify to form a waterproof layer, the hardness is low, and it is easy to be "scratched" during us...
Claims
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