Buna - BR, SBR - Trinseo

Kunststoffe international, 2005-11-21, Development History of Plastics: Growth through Changing Times
...fen developed polyamide 6, which he obtained by polymerisation of caprolactam. The product was given the trade name Perlon. In the same year, production of synthetic rubber, known as Buna S (styrene-butadiene) and Buna N (butadiene-acrylonitrile), started at the Buna works of IG Farben. At Ludwigshafen, Otto Bayer and his co-workers discovered the polyaddition of isocyanates and polyols to form polyurethane. In 1938, fibre production from PA 66 started at DuPont. The “nylon stockings” that were...

Kunststoffe international, 2005-11-21, Driving the Automotive Industry: Engineering Elastomers
...tread compounds, have been completed in the last five years. These rubbers are characterised by high mechanical property values combined with good processability. New grades, e.g. the development product Buna VSL KA 8955 (Lanxess, Leverkusen) – crosslinked by a multifunctional coupling agent, further improve the roll resistance and especially the abrasion resistance of tyres through the changed macrostructure. In addition to the MES (morpholino ethane sulphonic acid)-stretched Europrene SOL R 72...

Kunststoffe international, 2005-11-21, Germ-free Precision Pumps: Dosing without Side-effects
... outer wall of the bottle allows air to flow into the space between the inner bag and outer wall to equalise the pressure. Materials employed: Polyethylene (PE), polypropylene (PP), polyoxymethylene (POM), butadiene-sodium rubber (BUNA) (see Fig. 1). How the 3-K system works When the pump is actuated, pressure is exerted on the product in the pump; a pressure of 3 bar opens the valve and releases a spray or drops. After application, the valve closes the system, and this ensures uniform, accura...

Kunststoffe international, 2008-01-15, Elastomer Industry Has Understood
Elastomer Industry Has Understood Elastomers (Trade Fair Report K 2007) The elastomer industry has become ever more heavily dependent on automotive manufacture (approx. 68 % of elastomer products are processed in this sector). Increasing raw material and energy costs associated with spiraling oil prices and growing price pressure due to cheap imports from Asia and Eastern Europe have severely shrunk margins despite continually rising sales. The European, and in particular the German, elastome...

Kunststoffe international, 2008-02-29, EPDM and HNBR versus Summer Smog
... a very wide temperature range, because the plasticizer-free hoses must naturally not embrittle at low temperatures either. Low Viscosity without Plasticizers As detailed studies at Lanxess have shown, both peroxide cross-linked vulcanizates of Buna EP, an EPDM rubber, and of Therban, a hydrogenated nitrile rubber (HNBR), possess the necessary properties. Both are already widely used in the automotive sector: due to its weatherability, aging-resistance and good low-temperature flexibility, EPD...

Kunststoffe international, 2010-04-20, From Natural Rubber to High-Tech Material
...nomers that are chemically different to those found in natural rubber. Breakthrough with Styrene and Nitrile Rubbers Amongst the first synthetic rubbers that could beat natural ones on the basis of technical advantages was the styrene rubber Buna S. Its butadiene and styrene monomers were combined with the help of sodium catalysts and a great deal of process technology know-how to make a material that gave vehicle tires a longer life than natural rubber. The first products with a Buna S tread we...

Kunststoffe international, 2010-11-25, Of Fibers, Foam and Nano (?)
...s with the help of diisocyanates. Using a triisocyanate (4,4 ,4 - triphenylmethane triisocyanate) the Leverkusen working group succeeded in manufacturing an adhesive for bonding the elastomer Buna with metal – Polystal. The first application at the time was less than peaceful: the bonding of Buna S to the treads of tank tracks. PU coating of fabrics fell into the same application field, that is mustard gas proof protective suits. Moreover, for the generation 75+ the term “Mosquito” is less assoc...