VAE for Caulks and Sealants
A current trend in the USA is to seal heating, ventilation and air-conditioning ducts with sealants to prevent exhaust air escape, and so save energy costs. To meet this demand, WACKER has developed special VINNAPAS® vinyl acetate-ethylene copolymer dispersions that are ideal for formulating high-quality sealants.
Essentially, the sealants have to be provided with the necessary adhesion, stability and flexibility as well as heat resistance. Thanks to VAE, all that is possible.
Heating, ventilation and air-conditioning (HVAC) systems are popular in the USA. Electric blowers deliver hot or cold air, as appropriate, through an extensive duct network to individual rooms to bring them to the required temperature. According to the US Energy Information Administration, air-conditioning costs – at around 47 percent – are the largest item on a household’s energy bill in the United States. Poorly sealed HVAC air ducts contribute significantly to high energy consumption. Leaks in the ducts that transport the hot or cold air into individual rooms can add hundreds of dollars a year to utility bills.
Saving energy and costs: Flexible sealing compounds based on WACKER’s VAE technology are an easy and reliable way to seal the metal ductwork in HVAC systems.
Sealing of the metal ductwork is easy with the aid of flexible sealing compounds. Polymer-based systems, for which WACKER has been supplying VAE dispersions as binders since 2009, are particularly suitable for this. They provide the water-based sealants with the necessary adhesion, stability and flexibility. In addition, WACKER’s VAE dispersions are heat-resistant and retain their outstanding adhesive properties even when exposed to high temperatures.
Depending on applications and requirements, WACKER offers different VINNAPAS® grades that are suitable for the formulation of sealants. With the right grade, the finished formulations show excellent bonding, even to difficult substrates such as PVC and metal. The various VINNAPAS® grades furthermore possess high filler acceptance. Compared to alternative binders, WACKER’s VAE dispersions have a clear advantage. “Our VAE can be produced from a range of different raw materials. One possible starting material is natural gas, the price of which is virtually constant compared to that of crude oil. This allows us to offer our customers price stability,” says Dr. Martin Schierhorn, strategic marketing manager for VAE dispersions for sealing and construction applications.