Good quality polysulfide sealant, polyurethane sealant, high quality and low price, Hengshui Ruida rubber is preferred

  Two component polysulfide sealant edit entry B add meaning? The two-component polysulfide sealant is a base paste made of liquid polysulfide rubber as the main agent, adding reinforcing agent, toughening agent, tackifier, thixotropic agent and other additives; After vulcanization, the elastic sealing paste can be mixed into two components
The two-component polysulfide sealant is a normal temperature vulcanized two-component building class B first-class polysulfide sealant with self-adhesive property with concrete and liquid polysulfide rubber as the base material, which has the ability of caulking and water stop
The other kind of polysulfide sealant is two-component
Component A is white paste in barrels, and component B is liquid curing agent in bottles (for the convenience of the construction party's requirements for pigments, the colors are boxed separately, one in one group)
When in use, squeeze all the liquid of component B into the barrel of component A, put in the pigment according to the construction color requirements, and quickly mix up and down until uniform
Use a small shovel to apply the mixed sealant into the part to be constructed
After 48 hours, it can be soaked and contacted with water
Precautions: 1
All the liquid of component B shall be put into component A, otherwise it will affect the curing time and gelation
The sealant shall be used up as soon as possible after being evenly prepared (the application period is 2 hours) to avoid waste caused by paste curing (no construction after curing)
2
The installation of construction interface shall be clean and dry, otherwise the adhesion of sealant will be affected
3
Avoid water and rain within 48 hours after construction
The two-component polysulfide sealant produced by our factory has the following advantages: the color is changed to a separate packing box to solve the problem of market adjustment, and the finished products are single black; White or gray paste with special requirements of the construction party can be realized by not or less black color; Due to the modified formula of our company, the characteristics of fast surface drying time, fast overall curing time and strong adhesion of finished products are realized, so as to strive for time and quality for the construction party to catch up with the project progress
Note: This product is divided into flowing type and non flowing type
Basic information Chinese name two component polysulfide sealant surface drying time ≤ 24h  Applicable period & Ge; 2H min , This kind of sealant has excellent resistance to fuel, hydraulic oil, water and various chemicals, as well as heat resistance and atmospheric aging resistance
Generally vulcanizable
According to the composition, it can be divided into two-component (or three-component) and single component types
Its processing adopts the process of premixing grinding filling Two component polysulfide sealant is the leading waterproof material at home and abroad
In foreign developed countries, the wall joints of medium and high-rise buildings are sealed with polysulfide building paste
Polysulfide waterproof sealing paste is suitable for sealing the joints of long-term flooded buildings and has good bonding performance with concrete
For example, polysulfide sealing paste is used in underground waterproof joints, aircraft runways, water storage sewage, sewage tanks, underground projects and large-scale water conservancy projects
It has aging resistance, durability, air tightness and water resistance
It is a high elongation rubber shaped high elastomer with good adhesion, This product has been used in some large reservoirs, reservoirs, sewage tanks and underground projects in China, and has been highly praised by engineers and technicians 2、 Product technical performance Properties of polymers: Non sagging, high elongation, low modulus polysulfide building sealant is rubber like high elastomer after complete curing
Mix proportion: main agent (a): curing agent (b) = 100:10 (mass parts, under standard state), changes with seasons and regional temperatures
The application period can be adjusted by the amount of curing agent used
The variation range of component B is between 8-12 3、 Construction method: 1
Treatment of sealed surface: Before construction, the greasy dirt, attachments, dust and other sundries on the adhered surface shall be removed to ensure that the adhered surface is dry and flat to prevent poor bonding 2
Filling backing material: Fill the joint with backing material according to the design requirements 3
Brushing primer: For projects where the design requires the use of primer, or the sealing of long-term immersion parts, the primer needs to be painted on the adhered surface and dried to form a film 4
Preparation of sealant: According to the mix proportion given in the manual, mix the two components evenly and then use them
Whether it is mixed by machine or by hand, it should achieve uniform color and no color difference
Prevent bubbles from mixing during mixing, prevent bubbles from mixing during gluing, compact and fill the sealing place Requirements for physical and mechanical properties of polysulfide rubber No
project technical control index 1 density g / cm specified value & plusmn; 0
1 g / cm2 flow sag ≤ 3mm leveling, smooth, 3 surface dry time ≤ 24h4 applicable period & Ge; 2h5 elastic recovery rate & Ge; 70% 6 tensile modulus 23 DEG; C< 0
4MPa-20° C< 0
6MPa 7 no damage to the bonding property at constant elongation 8 no damage to the bonding property at constant elongation after immersion 9 no damage to the bonding property after cold drawing hot pressing 10 mass loss rate ≤ 5% expanded serial number project technical index 20hm25lm20lm1 density, g / cm specified value & plusmn; 0
12 fluidity (mm) Sag (n type) ≤ 3 leveling (L-type) smooth leveling 3 surface drying time (H) ≤ 244 applicable period (H) ≥ 25 elastic recovery rate (%) & Ge; 706 tensile modulus (MPA): 23 ℃ & gt; 0
4 or & gt; 0
6≤ 0
4 or & le; 0
6-20℃> 0
4 or & gt; 0
6≤ 0
4 or & le; 0
67 no damage to the adhesion at constant elongation 8 no damage to the adhesion at constant elongation after immersion 9 no damage to the adhesion after cold drawing hot pressing 10 no damage to the adhesion after immersion and tension compression cycles 11 mass loss rate (%) ≤ 5
Construction Technology 5
1 cleaning of sealing interface First, the 30*30mm foam slabs reserved in the expansion joints of the two box culverts are removed by steel drill, and the impurities in the concrete deformation joint and the surface are removed to remove dust and guarantee the drying of the base surface
For honeycomb pitted surface and porous surface, polish the glued surface with polishing machine, steel brush and other tools, and expose the firm structural layer
Dry the surface moisture with an electric hair dryer at the wet interface 5
2 treatment of deformation joint before gluing 1
For the deformation joint after base course treatment, the dust and residual slag in the joint shall be blown away by air compressor 2
For the unsealed areas on both sides of the deformation joint, a protective tape with a width of 20 ~ 30mm shall be pasted at 10mm on both sides before construction, so as to prevent the surface of the structure from being dirty by excess polysulfide glue during construction 3
The foundation surface shall be cleaned, and the supervisor shall be informed to accept the foundation surface after passing the self inspection
The next construction can be carried out after passing the acceptance 5
3 sealant configuration process 1
Material configuration and use instructions for primer: This product is composed of two components a and B
when using, mix component a (colorless and transparent) and group B (reddish brown) evenly in 1:1, brush it on the glue injection base surface on both sides of the deformation joint with a brush, and inject glue after the primer surface on the base surface is dry
(Note: the primer on the base surface must be dry before injecting glue, otherwise it will seriously affect the bonding
The product is volatile, the two components are packaged separately, and the storage period is one year under sealed conditions
The primer after mixing is required to be used up at one time
) 2
Material configuration of two-component polysulfide adhesive ① Material ratio: component a (white base paste), hereinafter referred to as a; A: B = 10:1 preparation (the manufacturer has finished the proportional sub packaging before leaving the factory, and there is no need to weigh again on site) ② Glue mixing: open the lid of the packing barrel of component A, add component B into the packing barrel of component A, clamp the mixing tool with an electric hammer, start the low-speed switch first, mix from top to bottom for 3 minutes, then start the medium speed switch, mix for 5 ~ 8 minutes until the color of the glue is uniform, that is, complete the preparation and glue mixing process 5
4 gun loading process 1
Put the glue pressing disc with glue outlet hole and thrust rod in the gun loader into the mixed rubber surface in the piston barrel 2
Remove the front and rear screw caps of the glue injection gun barrel, align the gun barrel mouth with the glue outlet in the middle of the glue pressing plate, push the gun barrel and thrust rod, and press down hard
At this time, the rubber material is loaded into the gun barrel upward, and the air in the pipe is discharged along the tail of the gun barrel until it is filled 3
Install the front and rear screw caps filled with glue, and install the gun nozzle corresponding to the width of the sizing seam at the same time
After completing the sizing process, you can inject and apply glue 5
5 glue injection process 1
Insert the gun nozzle into the deformation joint to be sealed, inject the sealant into the deformation joint with uniform density according to the design depth, and then scrape it with a special * tool with radian *, * the joint surface after * is crescent shaped, the solidified colloid surface shall be smooth and flat without bubbles, the colloid interior shall be dense without broken ends, and the bonding shall be firm without degumming, fracture and water seepage 2
The best strength of the adhesive is 7 days after curing at room temperature (25 & plusmn; 3 ℃), and the destructive tests such as air tightness, water tightness, oil tightness and various performance tests cannot be carried out within 7 days 3
As the depth of deformation joint of the project is 3cm, it can be formed at one time during glue injection 5
6 colloid connection process during gluing If one deformation joint cannot be filled with glue at one time, the following two methods shall be adopted for the second glue injection: dry connection and wet connection 1
The interval between two gluing operations shall not exceed 8 hours
Generally, wet connection is adopted
Wet connection has no special requirements for colloidal joints and can be applied continuously 2
When the interval between two gluing operations may exceed 8 hours, dry connection method shall be adopted
Treatment method of dry connection colloid joint: ① At the end of the previous gluing, the inclined rough surface lap surface shall be left ② When applying glue again, first apply a layer of glue on the inclined surface of the original colloidal joint by hand or scraper, and then carry out this gluing construction 6
Construction quality control of deformation joint sealant 1
Inspection before use of sealant: the sealant colloid shall have bright fine seams, no foreign matters and no caking
If necessary, it can be applied to the test section for inspection 2
For the deformation joint after sizing, the surface of the adhesive layer shall be free of cracks and bubbles, the surface shall be flat and smooth, the gluing shall be full without degumming and leakage, and the colloid color shall be uniform 3
The sealant shall be firmly bonded to the deformation joint, and the bonding joint shall be neat and smooth as required
After curing and completely vulcanizing into elastic body, the colloid hardness shall meet the design requirements 4
Key quality control procedures during sealant construction are as follows: ① The surface of the steel structure must be cleaned and cleaned with a hand-held grinding wheel without oil stain or dust when the interface is exposed ② The sealant shall be fully mixed, and the two components shall be mixed until the color is uniform ③ Before gluing, first brush the primer on the gluing surface, and then apply one layer of glue manually and squeeze it repeatedly before injection and glue application ④ The sealant after mixing shall be used up within the required time
The sealant beyond the adaptation period cannot be used with the newly mixed sealant ⑤ During the gluing process, the glue lapping shall be constructed in strict accordance with the lapping process requirements ⑥ In the gluing project, pay attention to one direction, and ensure that the glue layer is dense to avoid bubbles and lack of glue ⑦ Pay attention to curing before the rubber layer is fully vulcanized, and it shall not be soaked in water or artificially damaged ⑧ Technical disclosure shall be carried out before construction
The construction team shall clarify the division of labor, practically implement each link to everyone, and strengthen the education and implementation of quality and sense of responsibility of construction personnel 7
Construction safety requirements 1
The construction personnel must be trained and qualified before taking the post, fully master the construction safety technology and quality standards that should be known and learned, and strengthen the awareness of safety and quality 2
The on-site construction personnel must wear soft shoes with flat soles, and are not allowed to wear leather shoes with roots, nails and hard soles, so as not to damage and affect the construction surface quality 3
Construction personnel shall wear work clothes and protective equipment (safety belt, safety helmet, protective glasses and protective gloves, etc
) before construction operation