UPU-L350 > Chemical

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Description

Description

UPU-L350 is a high-performance urethane product made by the reaction of polyol and polyisocyanate groups, which has elasticity and

sealant with excellent elongation and durability , and is used to fill cracks in the roofs of general buildings.

This product is widely used as a sealant for concrete joints and as a sealant for vertical walls.

characteristic

• Excellent compatibility between the subject and hardener , and excellent filler function.

• Excellent durability even against repeated shrinkage and relaxation due to temperature changes due to high elongation and resilience.

• Partial repair is easy in case of damage to the waterproofing layer .

Purpose

• Expansion joints in various buildings

• Sealing of shrinkage and expansion joints in concrete structures

• Places requiring waterproofing and elasticity, such as other walls and vertical surfaces

Physical Properties

Application details

1. Background processing

• Concrete must be sufficiently cured. (Temperature: 25 ℃ , relative humidity: 80% or less, cured for at least 28 days.)

• of the base surface Oil , moisture , sand , dust, laitance etc. etc Completely remove foreign substances Remove and maintain flatness .

If foreign substances are not completely removed, poor adhesion may occur .)

• In the case of materials where penetration of the undercoat is difficult, a film of the undercoat may be formed during the undercoat painting, which may cause poor adhesion to the intermediate coat, so sufficient pretreatment work must be performed before painting the undercoat .

 In case of high-strength concrete (260 kgf/ ㎠ or more), grinding may cause a decrease in adhesion, so it must be done using the blasting method.

• Soji-myeon A gap Home is With putty Fill it up surface adjustment after Please paint it .

• When painting, completely remove any old paint film before painting.

2. Painting conditions

• Ambient temperature: 5 to 35℃, surface humidity: 80% or less, concrete moisture content : 6% or less, surface temperature: 40℃ or less, surface pH: 9 or less

• Surface temperature : at least 3℃ higher than the dew point temperature

• indoor In a confined space When using ( especially in summer) High humidity Condition or winter ) on the surface of the film The phenomenon of elution Will occur number Because there is Use Prohibited . (No air convection and humidity may cause a decrease in the film properties and adhesion .)

• Avoid painting outdoors on days when extreme heat (temperatures above 28℃) is expected . (High temperatures can cause swelling .)

please perform construction after 4 PM when the surface temperature drops .

3. Painting system

• under coat: UPU-P100 Primer

• Urethane sealant : UPU-L350

• intermediate coat: UPU-L300

• Topcoat: UPU-T

4. Painting method

• Hera

• After inserting the backup material, use a rubber spatula to apply sealant. It fills up .

• Crack repair When painting, paint in the same way as general PUTTY work.

• Grouts in new buildings During construction Use masking tape to prevent contamination of the surrounding area.

5. Mixing

• Base (Part A): Hardener (Part B) = 5:1 ( by weight )

• Base and Hardener By mixing ratio Don't mix or uniform Mixed Not possible Won't case of the block Poor hardening Will occur number Because there is certainly Instructed By mixing ratio Electric Mixer By using Evenly enough mix after When to use I hope so .

6. Thinning

• Undiluted or with the specified diluent

• When necessary absoluteness Avoid over-dilution. Excessive dilution may result in a shortened curing time. In delay Followed Film hardness Deterioration , cracking , swelling , dissolution, and reduced flowability Problems such as It causes .

• Do not use any thinner other than the designated thinner . Thinner containing alcohol ( epoxy / lacquer) Never use thinners , etc. as they can cause poor drying and cracking .

7. Drying time

8. Precautions for use

• Since it is a two- component urethane reactive paint, it must be used within the working life.

(The mixing time may vary depending on the storage temperature and ambient temperature.)

• The amount of paint required may vary depending on the condition of the painted surface, roughness, climate conditions, and painting method, so please check carefully before use.

• Bubbles may occur when used at high temperatures .

( Atmospheric temperature : Above 30℃.  Surface temperature : (38℃ or higher)

• Avoid painting on rainy days , days with high humidity (80 degrees Celsius or higher), days with low temperatures (5 degrees Celsius or lower), and days with high temperatures ( surface temperatures of 40 degrees Celsius or higher) as normal properties may not be achieved.

• If you pour the hardener into the subject in advance and do not mix it, the reaction will proceed and foreign substances will be generated and spreadability will decrease, so mix it immediately and paint.

• Do not mix with other paints.

• In 1 time The thickness of the coating In excess Dojangsi Bubbles Because it happens caution I hope so .

• Of paint Storage is Shady Gout Going well In a place Keep it outdoors To be stored case Direct sunlight Avoid number So that The tent Cover it Stored at high temperatures In the summer outdoors Stored in the wild Paint temperature ascended In status When working Curing speed Because it gets faster Workability , smoothness, etc. The problem is may occur there is .

• When applying a repair coating on a previous coating or old coating , perform a test coating in advance and if there are no abnormalities (such as adhesion), apply the repair coating.

• Apply the base coat completely to areas that have not been treated with the base coat , as there is a risk of bubbles forming during the second coat .

• When diluting the paint thinner excessively to improve mixing and workability at low temperatures, drying may be poor, film hardness may be reduced, and cracks may occur. Please be careful as phenomena such as this may occur.

• If pinholes or swelling occur due to pores , remove the affected area and then apply urethane sealant. Apply follow- up painting after the filling work .

• If the surface is not tacky due to rain or snow, or if the interval between recoatings has elapsed after the intermediate coating, sand the intermediate surface , wash it with a solvent, dilute the urethane primer, and then apply additional coating.

• The intermediate product is a yellowing type and its color may change due to ultraviolet rays after a certain period of time after painting.

• The hardener reacts with moisture in the air and hardens, so seal any remaining hardener immediately after use and store in a cool, dark place .

Do not use paint that has exceeded its curing time, as this will result in poor spreadability and poor coating appearance.

• intermediate coat is scraping and It is divided into main paints and work is done, and if scraping is not done, bubbles may be generated depending on the pores on the concrete surface. It can be and is a transitional period Bubbles, swelling , and pinholes may occur during painting .

• Urethane intermediate should be applied quickly (within 10 minutes at 20℃) taking into account the partial leveling of the construction joints.

• When painting in a closed space or underground, surface condensation or dissolution due to high humidity (dew, frost, boiling, etc.) may cause oil spots and surface slipperiness, which may cause poor adhesion to subsequent coating surfaces (intermediate and top coats). Therefore , operate the ventilation system to ventilate, check the condition of the coating (drying and surface dissolution, etc. ), and if there are no abnormalities, proceed with subsequent painting.

• When stored outdoors, storage performance may deteriorate due to precipitation and hardening of the subject. Swelling, etc. may occur .

• Since the product is a chemical product, it may deteriorate if stored for a long period of time , so use it within the expiration date.

• In case of inhalation or ingestion, take emergency measures according to the warning label on the side of the product container in accordance with the Industrial Safety and Health Act and immediately seek medical attention from a specialist.

• Any remaining paint after use may cause a dry film or hardening phenomenon, so use all of it immediately after opening.

• Be sure to wear protective equipment when working.

• Avoid contact with eyes, skin and respiratory tract with the generated vapors .

• Use ventilation.

• Do not work in confined spaces.

• If it comes into contact with clothing, be sure to wash it with soap and detergent and water.

• After completing the painting work , immediately wash the equipment using urethane thinner.

• Cloths or other items contaminated with the product may spontaneously combust if stored together with flammable materials, so be sure to dispose of them in a non-flammable container.

• After painting, wash your body thoroughly with soap and water .

• Dispose of waste paint in accordance with the Ministry of Environment ordinance and local government laws and regulations.

Storage

• Moisture None The temperature 5℃ ~ In a room maintained at 25℃ completely Sealed Keep it.

• Outdoor storage is prohibited.

(Storage performance is affected by ultraviolet rays and external temperature) away Sedimentation Back Will occur number and it rains Due to influence can Internal and external Rusting and Moisture inflow Will occur number , and inside the can Moisture Will be introduced In case of poor curing, etc. Will occur number there is.)

• Direct sunlight directly subject Outside Storage / Use whirlwind In response Followed paint rigidity The phenomenon As it occurs certainly indoor custody Do it I hope so .

• product Courage is certainly Sealed The injection port The top Towards custody Do it I hope so .

Storage period

• 12 months from the date of manufacture ( 5℃ ~ (When stored indoors at 25℃)

• Depending on the storage environment, the storage condition (sedimentation and separation, change in paint viscosity) may change and the storage period may be shortened . settles over time due to the pigment component of the body, and may be affected by the environment during transportation or storage.

• The amount of sedimentation varies depending on the environment. Usually, at high temperatures, the viscosity of the product decreases and the high specific gravity pigments settle to the bottom.

• The rate of sedimentation increases and at low temperatures, the viscosity of the product increases, slowing down the rate of sedimentation. Therefore, to store it at the recommended temperature , and when using it, we recommend using it at room temperature.

• Transportation: During hot weather , high temperatures during transport can rapidly accelerate sedimentation, regardless of storage period.

• If sedimentation occurs due to environmental factors, please use after stirring with a stirrer or disperser . (Data attached)

Warnings and Precautions

Please refer to the MSDS for further details.