Free Newsletter
Register for our Free Newsletters
Newsletter
Zones
Advanced Composites
LeftNav
Aerospace
LeftNav
Amorphous Metal Structures
LeftNav
Analysis and Simulation
LeftNav
Asbestos and Substitutes
LeftNav
Associations, Research Organisations and Universities
LeftNav
Automation Equipment
LeftNav
Automotive
LeftNav
Biomaterials
LeftNav
Building Materials
LeftNav
Bulk Handling and Storage
LeftNav
CFCs and Substitutes
LeftNav
Company
LeftNav
Components
LeftNav
Consultancy
LeftNav
View All
Other Carouselweb publications
Carousel Web
Defense File
New Materials
Pro Health Zone
Pro Manufacturing Zone
Pro Security Zone
Web Lec
Pro Engineering Zone
 
 
 
News

Tiny particles, big effect

Bayer MaterialScience AG : 27 April, 2004  (Company News)
With the Dispercoll
Adhesives formulated with these products are characterized above all by their high green strength. This enables manufacturers of various end products to continue processing immediately after bonding, resulting in a significant leap in productivity. Furthermore, the new additives impart aqueous adhesives with a longer open time and thus ensure a longer processing.

Dispercoll® S products are particularly advantageous in formulating aqueous adhesives with Dispercoll® C polychloroprene dispersions. In particular, adhesives formulated with products with a high hydroxyl content, such as Dispercoll® C 2325, exhibit a significantly greater heat resistance that was previously attainable only through the use of two-component technology. A combination of these raw materials is therefore the system of choice for the formulation of one-component aqueous adhesives that must withstand elevated temperatures.

These additives also offer interesting new options for the formulation of other aqueous adhesive systems, such as those based on Dispercoll® U polyurethane dispersions. The primary applications for this type of aqueous adhesives are the furniture, automotive, shoe and construction industries. There is a strong trend in these industries toward reduced-solvent, and thus more environmentally compatible, adhesive systems.

Dispercoll® S dispersions contain silicon dioxide with particles sizes between 9 and 55 nanometers, and also vary in solids content. “The desired application viscosity of the adhesives can be precisely formulated by selecting the appropriate silica gel or by combining various types. That means a broad viscosity range, from paste-like to liquid consistencies, can therefore be covered”, says Dr. Rüdiger Musch, an expert on polychloroprene adhesive raw materials at Bayer MaterialScience. “The formulation possibilities are almost endless – highly pseudoplastic types can even be easily applied to vertical surfaces.” The specific crosslinking and gelling behavior of the nanoparticles also imparts the adhesives with additional outstanding properties. In addition, formulated adhesives containing Dispercoll® S also show very good storage stability.
Bookmark and Share
 
Home I Editor's Blog I News by Zone I News by Date I News by Category I Special Reports I Directory I Events I Advertise I Submit Your News I About Us I Guides
 
   Â© 2012 NewMaterials.com
Netgains Logo