50 Years of VINNAPAS®

Usually invisible, but always indispensable: WACKER's dispersible polymer powders have been leaving their mark on the construction industry for more than 50 years now. Enabling high-quality mineral building materials with precisely defined technical properties, as well as opening up a great many novel applications and techniques, these powders help rationalize construction-site processing. In sum: VINNAPAS® polymer powders have revolutionized the construction sector.

Binders have been around for a very long time. For example, about 14,000 years ago, craftsmen in what is now eastern Turkey used quick lime to lay bricks. 3,000 years ago, the Phoenicians were the first to mix lime with volcanic rock, thereby producing a material that hardened even under water. In Roman times, the first impressive structures made with mortar were built, such as the Pont du Gard" in southern France.

Nowadays, the construction industry mainly hits the headlines when taller and taller buildings spring up. The Petronas Towers in Kuala Lumpur and Toronto's CN Tower are good examples here. Regardless of mortar's long history, the innovation potential of this time-honored material is by no means exhausted. Even though mortar is a traditional material, we would be wrong not to see it in a "high tech" light. Especially dry-mix mortar, modified with high-quality polymer binders, opens up broad innovative potential and a great many novel functions. Even small quantities of dispersible polymer powder suffice to imbue the mortar with new properties and qualities.

New solutions

VINNaPAS polymer
Rising market demands were a major reason for new impulses in mortar technology. In the 1950s, mortar was still prepared on site from the individual raw materials. Germany's first post-war construction boom, however, soon required enhanced mixtures. Because "traditional" mortar comprising cement, sand and water adheres by way of mechanically interlocking with the substrate, it can only be used with porous substrates. That's why ordinary mortar was soon unable to meet growing demands of the construction sector.

As long ago as the 1950s, therefore, liquid polymer binders were added to mortar to enable better adhesion to a wide range of substrates. The drawback to this system, however, was that exactly the right amount of polymer binder had to be added to the mortar – at the construction site, which meant that metering errors were common.

In contrast, the invention of dispersible polymer powders was tantamount to revolutionizing the construction sector, because they made it possible to pre-mix mortars at the factory. On construction sites, these dry-mortar systems only needed to be stirred with water, simplifying matters enormously for the building industry and bringing economic advantages.

The birth of "VINNAPAS®"

The binder, marketed under the name VINNAPAS®, is a vinyl acetate/ethylene copolymer. VINNAPAS® polymer powders constitute what are known as spray-dried dispersions. The powder particles consist of a water soluble protective-colloid matrix in which the water-insoluble, dispersible particles are embedded. An anticaking agent prevents the powder particles from sticking together.

The name dispersible polymer powder is based on its ability to "redisperse" when water is added. As the mortar sets, flexible polymer bridges are formed between the brittle, mineral constituents of the mortar, thus greatly improving its adhesion to a wide range of substrates. The polymer bridges also increase the system's flexibility. In addition, it is possible to incorporate extra properties such as thixotropy, leveling, superplasticizing and hydrophobicity. While this construction solution has long been a matter of course in western industrialized countries, there is currently above average growth in demand both in southern and eastern European countries and on Arab and Asian markets.

Flexible handling and cost saving application

Today, VINNAPAS® products are chiefly used as tile adhesives. This is because the so-called thin-bed technique of laying tiles would not be possible without dispersible polymer powders, which enable the tiler to work much more cost effectively.

VINNAPAS® also outscores conventional mortars in ease and flexibility of handling, because it can stick to diverse substrates. For example, tilers used to face the horror scenario of bonding tiles to other tiles, wood, PVC, cement screed or fiberboard all in one building – which necessitated using a specific mortar for each substrate. This is no longer necessary, thanks to modern dispersible polymer powders.

Dispersible polymer powders are especially beneficial in skyscrapers, as they reduce the overall weight of such buildings and hence impact positively on the steel frame and foundations.

Enhanced thermal insulation

The useful properties of dispersible polymer powders are employed to advantage in other fields, too. An example here is EIFS (exterior insulation and finish systems) to insulate outside walls of residential buildings. Effective thermal insulation is the best way to save energy: whereas a non-insulated outside wall lets about 50 percent of the heat escape, additional thermal insulation will reduce this figure to between 10 and 15 percent. On account of its excellent insulating properties, expanded polystyrene board is chosen as insulating material. However, it has the disadvantage of not forming a stable bond with cement.

VINNaPAS polymer
This drawback may be overcome with VINNAPAS® polymer powder. Three to four percent VINNAPAS® usually are enough to form a stable and permanent bond with the polystyrene board. This is equally true of the improved adhesion to all kinds of substrates, ranging from concrete, brick and old plaster coatings, to mineral wool.

Preventing water damage and seepage losses

Sealing slurries are based on VINNAPAS® polymer powders, as well. Because they are easy to use, the slurries are a sure form of protecting a large number of buildings from water damage. The slurries not only prevent damage caused by water ingress, but also help save water. Impregnated water channels and reservoirs, for example, prevent water loss, thus promoting the efficient and sustainable use of water.

Reflecting mega trends

VINNaPAS polymer
Dispersible polymer powders have the potential to transcend current thinking by reflecting future megatrends. This applies as much to energy and water saving opportunities as it does to improving life conditions, as in interior design and lightweight construction. For example, efficient polymer-modified insulation can reduce uncomfortable drafts and inhibit unhealthy growth of mold, thereby greatly enhancing the indoor climate.

50 years of polymer powders

More than 50 years ago, in 1957, WACKER produced its first dispersible polymer powders in Burghausen in the course of running a series of tests. At that time, no one could guess the major impact WACKER's pioneering work would have on the construction sector as a whole. Today, we are curious to see how things will develop. After all, mortar is not just a material with a rich history, but, more importantly, one that continues to blaze trails.
Click Here
To Know More or to Contact the Manufacturer
Please let us know your name.
Invalid Input
Please let us know your Designation.
Please let us know your Contact Number.
Please let us know your email address.
Please brief your query.
Our other Value-Added Services:

To receive updates through e-mail on Products, New Technologies & Equipment, please select the Product Category(s) you are interested in and click 'Submit'. This will help you save time plus you will get the best price quotations from many manufacturers, which you can then evaluate and negotiate.

Invalid Input
Invalid Input
Invalid Input
Samir Surlaker, Director, Assess Build Chem Private Limited, emphasizes the importance of a clear cover for a concrete structure since concrete as a porous material needs protection of its reinforcement. Along with the thickness (quantity) of cover, the porosity of

Read more ...

Concrete technology has come a long way since the Romans discovered the material, with a number of ingredients, which include a host of mineral and chemical admixtures, besides of course, the Portland cement, aggregates (coarse and fine), and water. These ingredients

Read more ...

Anil Kumar Pillai, GM, Ramco Cements, discusses two major softwares (Life 365 and DuraCrete), used in the industry for protection of RCC structures. The common design approach is faulty because we consider only the loading aspect, whereas the environmental aspect is equally

Read more ...

Fibre Tuff, macro synthetic polypropylene fibres, are heavy-duty synthetic fibres that are specially engineered for use as secondary reinforcements, providing excellent resistance to the post cracking capacity of concrete. They are replacing steel fibres in a range

Read more ...

Reinforced concrete design and construction practice has historically focused on the use of bonded straight or bend rebar as a method for rebar anchorage. This relies on bond integrity between the rebar and the concrete so that sufficient anchorage

Read more ...

Innovation and entrepreneurship are essential ingredients in building a successful commercial venture. The ways in which these two concepts fuel enterprise are something entrepreneur's never stop exploring. There is no doubt that innovation were

Read more ...

Alite and belite are the predominant phases of Portland cement formulation. Alite is impure tricalcium silicate (C3S) and belite is impure dicalcium silicate (C2S). The impurities are an integral part as cement is manufactured

Read more ...

Concrete is a versatile construction material and day by day its consumption is increasing globally. It is second only to water in the global consumption. No civil engineering structure is feasible without using concrete

Read more ...

The use of Graphene with concrete has been talked about and researched ever since Graphene was invented in 2010 which grabbed its inventors a Nobel prize. Nanospan is the first company in the world to break technological and commercial

Read more ...

Fosroc is the foundation of the JMH Group. It employs over 1700 employees in 17 operating companies based in Europe, the Gulf & Middle East, India, South Asia, and China. Through FGT, its trading company, it services another 50 countries

Read more ...

Established in 1983 by French expatriate entrepreneurs, the Dextra Group has a long history of growth and development, driven by strong entrepreneurship and innovation. It has diversified into three main activities: manufacturing, trading and freight forwarding

Read more ...

Jyotirmoy Mishra, Ph.D. Scholar, Department of Civil Engineering, Veer Surendra Sai University of Technology, Burla, Odisha, presents his research on the feasibility and compressive strength performance of geopolymer concrete

Read more ...

As every one ton of Cement (OPC) produced, emits 0.96 tons of CO2, there is an urgent need to promote blending materials (ex. GGBS &PSC) and screened slag, to achieve lower CO2 emissions, reduce greenhouse gas effect, reduce exploitation

Read more ...

In most of the developing countries, demand for steel for use as a reinforcing material is increasing day by day. However, when steel is in short supply, one can consider bamboo as an alternative material for reinforcement

Read more ...

There is high demand for white cement in countries with hot climates, as more heat is reflected from white concrete surfaces as compared to standard grey concrete. As a value-added product, white cement is becoming

Read more ...

Garry Martin, Director - Major Projects, Low & Bonar Construction Fibres, presents a new examination of the benefits of micro fibres in both the plastic and hardened state of concrete and their contribution to increased sustainability.

Read more ...

An integrated material and structural design strategy of strength through durability is the need of the hour since structures are designed for ductility and structural integrity. Dr. S. B. Hegde, President – Manufacturing

Read more ...

The demand for structural strengthening of ageing structures is growing rapidly in buildings, industrial structures, infrastructure projects like bridges, dams, etc. Structural Strengthening also

Read more ...

Durability and strength are two most important criteria and requirements for the long-term performance of concrete structures against weathering action, chemical attack and abrasion. Any deficiency

Read more ...

Cement is a key binder component of concrete production in the building industry. It is a complex hydraulic binder, made up of four main clinker components; alite (Ca3SiO5), belite (Ca2SiO4)

Read more ...

×
Sign-up for Free Subscription
'India Construction Week'
Weekly e-Newsletter on Construction Industry
Get the latest news, product launches, projects announced / awarded, government policies, investments, and expert views.