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七、Polyurethane waterproof coating
Briefing materials
Is a two-component chemical reaction curing type of flexible waterproof
material. Group A which were based on polyether resin and diisocyanate, and
other raw materials, manufactured after polymerization. containing isocyanates -
(NCO) polyurethane prepolymer. B were from the cross-linking agent,
plasticizers, fillers, catalytic agents processed.
■Features
Polyurethane waterproof coating in the curing is a former amorphous sticky liquid substances, particularly applicable to complex shape, Pipeline has become a waterproof construction with easy construction, waterproofing layer applied without seams, waterproof layers of the overall. Can form a highly flexible, high density and large elongation, the grass-roots stretching deformation or cracking adaptability. Therefore, using it is to guarantee the quality of the project the best choice.
■Scope
Special polyurethane waterproof coating applied to the modern senior external
basement waterproofing and flushing water, non-potable water pools are
waterproof, also applies to the protection level with the roof waterproof,
corrosion and corrosion resistance on the ground waterproof.
Performance indicators
Grading |
一等品 |
合格品 |
Indicators |
Stretch the tensile strength(Mpa) |
≥2.45 |
1.65 |
Elongation(%) |
≥450 |
≥350 |
Low Temperature Flexibility(℃) |
-35 |
-30 |
Solid Content(%) |
94% |
94% |
Impermeability(Mpa/30min) |
0.3 |
No leakage |
Table coating dry time(h) |
≤4 |
Nonstick hand |
Table coating dry time(h) |
≤12 |
No adhesive |
Construction Method
1.Construction conditions : require leveling layer with Singapore, rolling pressure light, water flow has not played a sand and rugged, and so Water rates should not exceed 9%.
2.Cleaning up the grassroots : the use of the blade in 0100 and the grassroots tools such as protruding from the surface, such as mortar knots debris cleaned up.
3.Coated plastic end : the equivalent of the traditional brushing cold weak oil operations, polyurethane waterproof coating A : B : xylene = 1 : 1.5:2 ratio with uniform mixing long after use for coating put brush rolled construction. Special parts oil Qieshua Brushing. General 0.25-0.4Kg/m2 coated with the appropriate volume. Coated plastic in the end after drying curing four hours. (Close, it is advisable feet) can be carried out under the Road Construction processes.
4.Construction waterproof coating :
Polyurethane will be A, B information by 1:1.5 (weight ratio), the ratio tie.
Mixture into barrels, with transfer speeds of 100-500 bpm electric blenders,
Stir well to timely construction of brushing, mixing good material in spent 1-2
hours.
Construction of the first film was the end of the dry curing basic plastic,
rubber or plastic scraper Tu scratching uniform layer of coating materials, Tu
scratching required uniform, about 1.5Kg/m2 coated with the appropriate,
Brushing should be unified to consider the construction of retreat and brushing
order.
Considering that the waterproof layer and the protective layer bonded firmly, in
the second film has not yet been cured, that is poorly Sprinkle the surface
clean about 2mm in diameter slag in the wet coating cured, securely bonded to
the coating surface.
■Product protection
1.Construction of the ingredients, it is necessary to strictly prevent the use of
contaminated materials have been completed renovation of the building facades,
eaves, windows and the ground.
2.Drain and not to plug the leakage of things, to ensure smooth flow.
3.Complete waterproof coating layer construction, to avoid hard objects coating
damage done protective layer, More attention should be paid to protect the
integrity of coating and, if found points and should ensure the timely repair
waterproofing layer intact.
■ Safety and attention to the matter
1.Material storage sites and the construction site No smoking.
2.Batching and the construction site to ensure good ventilation environment.
3.Construction personnel should wear uniforms, shoes and gloves with masks, can
operate.
4.The eaves and dangerous construction sites, should wear seat belts.
5.Paint was contaminated tools and timely use of xylene wash clean, next to the
construction of recycling.
6.Construction of a 24-hour film, there are still sticky, for the second time when
brushing, it would be appropriate to first Sprinkle some talcum powder.
Construction on another monk Nonstick feet, and this practice of waterproof no
effect on the quality of the project.
■Packing
A small iron materials 16Kg/ barrels B barrels information 24Kg/
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