Sunday, October 11, 2009

Roofing Materials Made with Asphalt Nanocomposites

Building Materials Investment Corporation (Wilmington, DE), a part of GAF Materials Corporation the largest U.S. roofing materials manufacturer, has patented an asphalt nanocomposite materials that can be used in roofing shingles and other building materials The asphalt-based nanocomposites are particle-filled matrices that include an asphalt flux or derivate and a layered clay mineral in an amount ranging from about 1% to 15% of weight. The nanocomposites result in improved mechanical properties such as heat deflection temperature, increased stiffness, higher tensile strength and better fire retardancy.

The asphalt-based nanocomposite is a nano-dispersion that is characterized as having higher melt viscosity as well as new crystallographic order evidenced in wide-angle X-ray diffraction (WAXD) studies. Such nanocomposites have superior tensile strength and significantly higher Young's modulus relative to their respective raw or filled coatings without nanoclays. The asphalt-based nanocomposite can be used as a coating for any material layer of a roofing shingle, according to inventors Vinay Mehta, Brian Kanze, Krishna Srinivasan and Awdhoot Vasant Kerkar, writing in U.S. Patent 7,582,155. It is worth noting, that the term "asphalt-based nanocomposite" denotes a composite material comprising asphalt as the major component. This system is distinct from polymer-based nanocomposites, in which a polymer is the major component.

The asphalt-based nanocomposite is made of particle filled layered clay minerals dispersed into a matrix of asphalt. The asphalt molecules intercalate (or exfoliate) between the clay mineral layers. decrease in ultimate elongation was, however, anticipated since the addition of polymer-based nanocomposites to different systems in the prior art also shows a similar decrease in elongation. The decrease in ultimate elongation is a result of a stiffer product being formed when the nanocomposite is employed.

Layered clay materials such as, for example, montmorillonite, hectorite, saponite and the like, are composed of silicate layers that have a thickness of about 1 to a few nanometers. Dispersions of such layered clay materials in polymers are frequently referred to as polymer-based nanocomposites. These are the type of nanomaterials used in the asphalt nanocomposite.

The asphalt-based nanocomposite can be prepared using a variety of methods, including: (1) a direct blending method; (2) a method in which asphalt is first fractionated into its multiple (usually four) components and then a layered clay mineral is blended therein; (3) a method in which a layered clay mineral is added to an asphalt flux or derivative thereof prior to blowing (i.e., oxidizing); or (4) a method in which asphalt flux or its derivative is first solubilized in an organic solvent, then mixed with a layered clay mineral and thereafter evaporated to remove the organic solvent.

12 comments:

  1. Nice blogging. Thanks for the information shared here dude. The Roofing materials plays a vital role. So good quality of roofing products are more preferable.

    ReplyDelete
  2. Nice to know about roofing materials made in asphalt. For sure, this is very useful to people who will install new roofs for their home. Indeed, there are plenty of types of roofing. In Miami, FL (my hometown), contractors guide their clients in choosing the right roofs that fit to their needs, lifestyle, and area.

    ReplyDelete
  3. A good blog always comes up with new and exciting information and while browsing and reading plenty of blogs, I have feel that this blog is really have all those quality. Keep posting. All the very best!!
    roofer in louisville

    ReplyDelete
  4. This is quite interesting. Asphalt used on road by itself is very durable, if it's used on roofing, it could possibly double the life of the roofing materials. Hope this gets to Los Angeles. Replacement windows could use this, well, could possibly use this.

    Anyway, more power!

    Katie Nicoll
    Los Angeles Window Replacement

    ReplyDelete
  5. Technology and innovations never fail to surprise. Now we have more reasons to feel secured in our own homes because of this latest innovation in roofing. This is very informative.^__^

    Eugene Head

    ReplyDelete
  6. Available in number of colors, this is the most common types of roofing shingles used by most of the people to cover their roofs. much easy to install, inexpensive and very durable. With a bit of know-how learn how to install asphalt shingles without professional help. Asphalt shingles come in two different varieties, fiberglass shingles and organic-mat shingles. Moving Companies

    ReplyDelete
  7. Asphalt shingles still have the lead when it comes to roofing due to its availability and cheapness, I just hope that they become even stronger now!

    -Keystone Contracting Corp.
    Roofing Contractor Queens

    ReplyDelete
  8. Types •Why board stock dominates: – Good mechanical propertie roof calgary

    ReplyDelete
  9. In order to enhance its performances, asphalt is often modified with polymers.

    Window replacement Los Angeles

    ReplyDelete
  10. Roof repair
    To minimize wrinkling and movement of the installed membrane during installation, lay down strips of plywood
    to walk on.

    ReplyDelete
  11. Thank you for taking the time to publish this information very useful! Roofers in Leyland

    ReplyDelete