Bathroom: requirements of polyurethane coated waterproof layer construction process, material 1, polyurethane waterproof coating material (two-component), should have the certificate, shall be re qualified after use. 2, group A is based on polyether diisocyanate resin and other raw materials, made after polymerization and reaction with isocyanate terminated 2, waterproof layer construction, should be cleaned at the surface of dust and other debris, and a clean damp cloth wipe once. The surface of the base 3, brushing waterproof layer, no uneven, loose sand, hollowing, cracking and other defects, the moisture content is less than 9%. 4, brushing primer (equivalent to cold base oil): five, 1, to ensure the project quality standard 1) waterproof materials and technical performance of non-woven fabric coating, must meet the design requirements of the relevant standards and regulations, products should be accompanied by a certificate of quality certification, waterproof materials, field sampling test, waterproof material without certification or examination unqualified shall not be used. 2) poly ammonia
Abstract: the construction technology of polyurethane coating waterproof layer
Material requirements
1, polyurethane waterproof coating material (two-component), should have the certificate, shall be re qualified after use.
2, group A is based on polyether diisocyanate resin and other raw materials, through polymerization and the reaction products containing isocyanate terminated polyurethane prepolymer, look for the yellow viscous, barrels, 20kg barrel. The second component is made of accelerator, curing agent, toughening agent, anti mildew agent, filler and dilute agent mixed processing, the appearance of red, black, white, yellow and brown, paste barrels, 40kg barrel.
Two, the main equipment
Generally should be equipped with an electric mixer (power 0.3-0.5KW, 200-500r/min), mixing barrel (volume 10L), paint bucket (3L), plastic or rubber scraper, rolling brush, paint brush, spring scales, dry powder fire extinguishers, etc..
Three, operating conditions
The surface of the base 1, brushing waterproof layer, dust and other debris must be cleaned, the surface residual mortar lumps and protrusions should be leveled, sweep, plastering, pressure, yin and Yang Kok should put into arc or obtuse angle.
The surface of the base 2, brushing waterproof layer should be kept dry, and to smooth, firm, no hollowing, cracks and other defects from the sand.
3, the leveling layer of earth leakage, Guan Gen, outlet, sanitary ware, root (edge) to receive the first round. The slope is in accordance with the design requirements, the components must be installed firmly, and the sealing is tight. After acceptance.
4, highlight the ground floor drain, pipe root, drain, yin and yang angle detail, should make an additional layer added, after brushing polyurethane rubber bottom, after finishing check and acceptance of concealed work.
5, waterproof layer used in all kinds of materials, grass treatment agents, xylene and other are flammable materials, storage and storage should be far away from the fire source, construction operation, should be strictly prohibited.
6, waterproof layer construction shall not be carried out in rainy days, windy days, the winter construction of the environment temperature should not be less than 5.
Four, operation technology
1, process flow
Clean up the base surfaces, detail processing and preparation of adhesive, coating adhesive (equivalent to cold base oil), middle layer construction and details of the first film, the second film, the third film of the construction of waterproof layer, waterproof layer
A test to test the water to protect the layer facing layer construction, waterproof layer two times the water proof layer acceptance
2, the waterproof layer should be cleaned before the construction of grassroots surface dust and other debris, and a clean damp cloth wipe once.
The surface of the base 3, brushing waterproof layer, no uneven, loose sand, hollowing, cracking and other defects, the moisture content is less than 9%.
4, brushing the bottom of the gel (equivalent to cold base oil):
1) preparation of the base rubber, polyurethane a material, B material to add xylene, the ratio of 1:1.5:2 (weight ratio) with stirring evenly, the amount should be formulated as the specific circumstances, should not be too much.
2) brushing primer, primer mixture well prepared according to law, with long handle brush evenly on the surface of the base, coating amount is 0.15-0.2kg/m2, after coating at room temperature after the 4H season, do not feel sticky, you can do the next step.
5, the film waterproof layer construction: polyurethane waterproof material for polyurethane a material, polyurethane B material and xylene, the ratio of 1:1.5:0.2 (weight ratio).
1) in the construction of waterproof material, its mix than the measurement to be accurate, and must use an electric mixer for strong mixing.
2) additional construction: the ground floor drain, Guan Gen, outlet, sanitary ware and other root (edge), yin and yang angle etc, should be in large area coating, do a cloth two additional waterproof oil, pressure on both sides of the joint of 200mm junction. Brushing water imitation material, the specific requirement is that the normal temperature 4H table dry, then brush second film waterproof material, 24h work, you can carry out the construction of a large area of film waterproof layer.
3) waterproof coating layer: the first layer: waterproof coating with polyurethane waterproof coating materials, plastic or rubber scraper scraping on the surface of uniform coating is coated with adhesive, the amount per square meter is 0.8kg, with no leakage of brush and blister defects, 24h after curing, can be second coat.
Second coating: in the cured coating, the coating surface is evenly coated in the direction of the first coating, and the scraping amount is the same as the first one. 24h after curing, and then according to the above formula and method of coating scraping the third coating, the amount of 0.4-0.5kg/m2 is appropriate to apply scraping. Three film thickness is 1.5mm. For the first time to test the water, in case of leakage, should be carried out to repair, leakage does not occur so far.
In addition to the above method, but also can be used for a long time to brush the vertical direction of each other four times. Such as a