RDP for Wall Putty
Your Leading Kaimaoxing Cellulose (Shandong) Co.,Ltd. Supplier
The Kaimaoxing factory was established in 2007. The boss and two experienced technical experts who came out of state-owned enterprises began to explore and embarked on the road of cellulose production. The first stage, 2008, ushered in the spring of China's real estate. The government commercialized houses, which set off the first small wave of real estate in Chinese history. A steady stream. With the gradual increase in orders from the factory, the factory expanded its production capacity for the first time and added production lines. At this time, our customers were all domestic. Until 2016, we increased the orders of many traders, who continuously sold the goods of Kaimaoxing factory to all over the world. In order to adapt to the needs of domestic competition and keep in line with foreign situations, we have been expanding our scientific research personnel and technical personnel.
Why Choose Us?
High quality
Our products are manufactured or executed to very high standards, using the finest materials and manufacturing processes.
Rich experience
We are serving more than 2,000 customers, provide reasonable solutions for joint agent applications and other fields.
Demand and application
We have been committed to research more applications of products will expand more products to meet the different needs of customers.
Technology support
From the two technical personnel when the factory was first established to the current technical team of 22.
What is RDP For Wall Putty？
The redispersible polymer powder(RDP) is a powder prepared by spray drying of a special emulsion. Due to its high bonding ability and unique properties, such as water resistance, good workability, and separation.
Benefits of RDP For Wall Putty
Improved workability
RDP enhances the workability of the putty, allowing it to be applied smoothly and easily on different surfaces. This ease of use makes it the preferred choice of building professionals.
01
Crack resistance
RDP’s flexibility and elongation properties significantly improve the putty’s resistance to cracking, ensuring a long-lasting and aesthetically pleasing finish.
02
Better adhesion
RDP enhances the adhesion of the putty to various substrates, promoting better bonding and reducing the risk of peeling.
03
Enhanced water resistance
The water resistance provided by RDP protects the putty from moisture-related damage, thereby improving its durability and performance over time.
04
Reduced shrinkage
The addition of RDP helps to minimize shrinkage during the drying process, ensuring a consistent and even surface.
05
Types of RDP For Wall Putty
Vinyl acetate ethylene (VAE) copolymer
VAE copolymer is the most widely used RDP type in wall putty. They offer excellent adhesion, flexibility and workability in a variety of substrates and conditions.
Vinyl acetate-vinyl tertiary carbonate (VA/VeoVa) copolymer
VA/VeoVa copolymers have greater water and weather resistance, making them suitable for exterior wall putty applications.
Acrylic copolymer
Acrylic copolymers have excellent water resistance and UV stability, making them ideal for use in putty formulations that are frequently exposed to moisture and sunlight.
Styrene-butadiene (SB) copolymer
SB copolymers have stronger adhesion and flexibility and are suitable for challenging substrates and conditions.
Application of RDP For Wall Putty
● Construction adhesives
● Tile adhesives
● Joint mortars
● External wall putty
● Building binders
● Filling compositions like concrete repair joints, crack isolation membranes, and waterproofing membrane applications.
Components of RDP For Wall Putty
Polymer resin in the core part of RDP, also the main component of Redispersible Polymer Powder, such as polyvinyl acetate/hexane resin.
It acts as a modified resin together with the resin, for example
A plasticizer that lowers the film forming temperature of the resin(usually vinyl acetate/ethylene copolymer resin does not require the addition of a plasticizer). Not every rubber powder has an additive component.
A layer of hydrophilic material wrapped on the surface of the Redispersible Polymer Powder particles. The most protective colloid of RDP is polyvinyl alchohol.
A material added to further expand the properties of the RDP, such as the addition of super water reducer in some flow-assisted rubber powders. As with the internally added additives, not every RDP contains such additives.
Fine mineral filler, mainly used to prevent the rubber powder from agglomerating during transportation and to facilitate the flow of rubber powder(dumping from paper bag or tank cars).
Material of RDP For Wall Putty
RDP powder, i.e Redispersible Polymer Powder, is a water soluble polymer made from ethylene-vinyl acetate (EVA) polymer through spray drying, it's designed for the construction industry to enhance the properties of dry mortar blends.
Process of RDP For Wall Putty
The production of redispersible polymer powder is mainly divided into two steps, namely, emulsion polymerization and drying.
Emulsion polymerization
Monomers adopted for emulsion polymerization determine the types of redispersible polymer powder. Polymer monomers used for the production of redispersible polymer powder are mainly olefins and unsaturated monomers, including a variety of vinyl esters and acrylic esters. The redispersible polymer powder is mainly used in building binders and adhesives, while the vinyl acetate polymer has such advantages as low price, high bond strength, non-toxic, harmless, safe and convenient for production and use. Therefore, it has the largest amount used in the polymer emulsion of building binders and adhesives.
Generally speaking, there is no particular limit on the polymerization method of preparing the emulsion used for the redispersible polymer powder. Various emulsion polymerization methods using water as the dispersion medium may be used. However, continuous or semi-continuous emulsion polymerization methods are the most preferably used. The seed emulsion polymerization method can also be used. Generally protective colloids and anionic or nonionic emulsifiers are used, or without emulsifiers. The solid content of polymer emulsion obtained from the preparation of redispersible polymer powder is usually between 40% and 60%, which can be properly adjusted depending on the performance of dryer, performance requirements of product and other additives required to be added before drying. For the ethylene-vinyl acetate copolymer emulsion, it should be diluted to 40% or less.
In order to improve the redispersibility of redispersible polymer powder and prevent caking during drying and storage, protective colloids or surfactants (emulsifiers) should be added before drying, making the redispersible polymer powder with strong hydrophilicity and alkali sensitivity. The most commonly used protective colloid is partially hydrolyzed polyvinyl alcohol (PVA). PVA contains a lot of hydroxyl groups, with quite poor water resistance. And the vinyl acetate polymer itself is poor in the water resistance, especially hot water resistance, due to its polar ester and carboxyl groups. In the redispersible polymer powder containing PVA and carboxyl groups, polyvalent metal salts can be added to improve its water resistance, especially hot water resistance, since PVA and carboxyl groups can react with metal salts to become insoluble in water. In the emulsion containing PVA, aldehydes can also be added for PVA acetalization and then to reduce its water absorption. In addition to PVA, some other protective colloids with good water resistance can also be selected to ensure the water resistance of product, such as polyacrylic acids and modified polyacrylic acids.
Before emulsion drying, some other adjuvants such as defoamers, thickeners and hydrophobic agents can be dried together with emulsion dispersions.
Emulsion drying
The most commonly used drying method of preparing the redispersible polymer powder is spray drying. Reduced pressure drying and freeze drying methods can also be used.
Drying is a difficulty in the preparation of redispersible polymer powder. Not all emulsions can be converted into dispersible polymer powder because these thermoplastic polymer emulsions, film-forming or even tacky at room temperature, must be converted to free-flowing powders at high temperatures. The diameter of emulsion particle in the emulsion dispersion is about several μm. In the spray drying process, emulsion particles will condense, so the particle size of redispersible polymer powder is usually 10-500μm. It can be seen from a scanning electron microscope (SEM) that a hollow structure will be formed by condensation of emulsion particles. After redispersible polymer powders redisperse, the diameter of emulsion powder is generally 0. 1-5μm. The particle size distribution of redispersed liquid emulsion particles is one of the main quality indexes of redispersible polymer powder during dispersion. It determines the bonding capacity of redispersible polymer powder and various effects as an additive, so appropriate dispersion and drying methods should be chosen. Try to use the dispersion liquids with as similar particle size distribution to original emulsions as possible, in order to ensure the redispersed liquid with near-identical properties to original emulsions.
Most of the redispersible polymer powder uses the parallel spray drying process, that is, the motion direction of powder is the same with hot air. Some also uses the counter-current spray drying process, with air or nitrogen generally used as the drying medium. During spray drying, emulsion particles are prone to condensation, discoloration and other problems, so it is necessary to strictly control the emulsion additives, dispersion and solid content, as well as the spray form, spray pressure, droplet size, inlet and outlet hot air temperature, air speed and other process factors. In general, dual nozzle or multi nozzle has superior effects heat utilization to single nozzle. Usually the nozzle pressure is about 4 x 105Pa, the inlet temperature of hot air between 100 and 250℃, the outlet temperature about 80℃. Adding such inert mineral anti-caking agents as kaolin, diatomaceous earth and talcum powder can prevent caking. But if added before drying, then anti-caking agents may be encapsulated by polymers into microcapsules and lose power. Most are sprayed with emulsion respectively and independently at the top of dryer, but it is also easy to lose and crust on the dryer and pipeline by air currents. The better method for adding additives is a two-part method. One part is sprayed with compressed air at the top of dryer, and the other part enters with the cold air at the bottom. In order to prevent caking, the remaining part can be saponified during the emulsion polymerization process when polymerization reaches 80% to 90%. Or melamine-formaldehyde condensates may be added to the emulsion. Also, a certain kind of emulsifier emulsion can be utilized.
In the production process of redispersible polymer powders, polymer powders are polymer “solid” particles transformed from monomer emulsified droplets. Strictly speaking, these particles are not solid indeed, since the polymers considered here are thermoplastic, which will become solids only below a certain critical temperature, referred to as the glass transition temperature (Tg). Only above this temperature will the thermoplastic body lose all of its crystalline properties. However, since polymers are intertwined like nets, this kind of material is in fact still in a quasi-solid state.
How to Maintain RDP For Wall Putty
Personal protective equipment (PPE)
When handling RDP, it is recommended to wear appropriate PPE, such as gloves and protective eyewear, to prevent direct contact with the skin or eyes.
Inhalation
Avoid inhaling the powder or dust particles generated during handling or mixing. It is advisable to work in a well-ventilated area or use proper respiratory protection where necessary.
Skin sensitization
If skin irritation or sensitization occurs, discontinue contact and seek medical advice.
Storage and handling
Store RDP in a cool, dry place, away from direct sunlight and sources of heat. Follow the manufacturer’s instructions for specific storage conditions and shelf life.
Compatibility and formulation considerations
Considering compatibility and optimal dosage requirements, when incorporating RDP into formulations or mixing with other additives. Consult the manufacturer’s guidelines and conduct compatibility tests if needed to ensure desired performance.
Regulatory compliance
It is important to comply with local regulations and guidelines pertaining to the handling, use, and disposal of RDP. This includes proper waste management practices and adherence to safety standards.
How to Identify the Quality of Redispersible Polymer Powder?
Film method
Take 100g of redispersible polymer powder dissolved in 100ml of water, after 2 minutes of full mixing, stir again, pour the solution on a piece of flat clean glass, glass placed in a ventilated shaded place. After sufficient drying, remove it. Observe the removed polymer film, the higher the transparency, the better the quality. Then pull the film moderately, the better the elasticity, the better the quality. Then cut the film into strips, immersed in water, 1 day later to observe, the less dissolved by water, the better the quality.
Dissolution method
Take a certain quality of redispersible polymer powder for full mixing, quietly observed for 5 minutes, in principle, the less insoluble matter precipitated to the bottom layer, the better the quality of redispersible polymer powder, this method is simple and easy to implement.
Ash method
Take a certain quality of redispersible polymer powder weighed and placed in a metal container, warmed to about 500 degrees, after 500 degrees of high temperature burning, cooled to room temperature, weighing again. The lighter the weight, the better the quality.
White Cement vs Wall Putty
Importance of the primer
In the comparison of white cement vs wall putty, primer is an important key. Do you want your construction to have a primer or not? If your answer is yes, then we are proffering you choose wall putty. Through wall putty, you can have a very fine finish. To provide it, you will need a primer. Although it looks like much more work, it also provides you with a better and more durable finish.
If you do not want to deal with the primer, you can use white cement. Through its structure, it provides you coarse finish compared with the wall putty. If you want to present quality work by spending much more time, white cement might be a better choice for you.
Waterproofing capacity
As many construction experts entitle us, the waterproofing capacity is substantial when making your decision for white cement vs wall putty. In this case, we can inform you that if you have waterproofing concerns, wall putty might not be the option for you. Of course, with other materials, you can provide the feature of waterproofing but wall putty is not waterproof by its nature. It can be applied to a dry or wet surface.
On the other hand, white cement provides you with a waterproofing capacity. However, it should be applied to the dry surface to reach the best outcome. Through this, it fills the unevenness of walls and provides waterproofing capacity.
Surface that you will apply them
Do you want to apply white cement or wall putty to the exterior or interior surface? The condition you have here is another significant factor when making your choice between white cement vs wall putty. If you want to apply it to the exterior surface, we suggest you to choose white cement. White cement is a good choice for both exterior and interior surfaces.
The use of wall putty for exterior surface might be advised but if you have an option of white cement, we can assure you that it will be better for you. Because of its waterproofing capacity, wall putty may not offer you the best results for the exterior surface. However, it is a better option for the interior surface.
Resistance to climate
T climate is another important condition for the construction process. For the sake of your work, you have to choose the material that gives you the best results. While comparing white cement vs wall putty, we can say that wall putty withers when it is exposed to climatic conditions.
On the other hand, because of its structure, white cement is more durable when it is exposed to specific climatic conditions. The resistance level of white cement is higher, so it gives you the best results if you are worried about the climate.
Property of binding
The other substantial condition that will affect your choice between the white cement and wall putty is the property of binding. Here, we can clarify that wall putty has a lower property of binding with water compared with white cement. However, its excellent structure provides the best adhesion and tensile strength that will ensure to prevent damage to the surface you are applying.
White cement has an amazing binding property. It can be bound with water or other proper substances. Thanks to its structure, while providing this binding property, it also strengthens the surface that you are applying.
Drying
Time is the most important condition, especially in the construction process. That is why you might wonder about the drying time of both materials. In this case, we can say that wall putty dries faster compared with the white cement. With most certain terms, we can say that the wall putty completely dries in an average of 6 hours.
The process of drying is longer for the white cement. Because of its structure, this period can be more or less dependent on the conditions of the climate, especially humidity. Even if it takes an average of 24 hours for it to dry, it will gain its whole strength in an average of 20 days.
Our Factory
Kaimaoxing Factory has focused on the production of cellulose for 15 years. During the 15 years, it has expanded its production line and floor space twice, serving more than 2,000 domestic customers. Provide reasonable solutions for joint agent applications and other fields.
FAQ
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