Styrene-Butadiene Latexes

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  • Styrene-butadiene or styrene-butadiene rubber (SBR) is a synthetic rubber copolymer consisting of styrene and butadiene. It has good abrasion resistance and good aging stability when protected by additives, and is widely used in car tires, where it may be blended with natural rubber.
  • It was originally developed prior to World War II in Germany. Industrial manufacture began during World War 2, where it was used extensively by the USA to replace the Far-East natural rubber supplies captured by the Japanese.
  • Styrene butadiene latexes usually have a resin content of about 50%. The styrene/butadiene ratio varies from 54:46 to 80:20. Most are carboxylated by the use of such acids as maleic [HOOCCHCHCOO], fumaric [HOOCCHCHCOOH], acrylic [CH2CHCOOH], or methacrylic [CH2C(CH3)COOH].
  • SB latexes are used in carpet backing and paper coatings. The other styrenics are used in paints, coatings, and floor polishes, plus many other uses. SB latex is made by emulsion polymerization. The reaction is started with free-radical initiators. The emulsion consists for 5 - 10 wt.% of non-rubber, more than half being emulsifiers (others components: initiators, modifiers, inorganic salts, free alkali and short stops).
  • A polymer string consists of random blocks of styrene and butadiene. Another way of producing SB latex is emulsification of SB rubber: SB rubber particles are dissolved in water with dispersing and wetting agents.
  • SBR LATEX is a carboxylated styrene butadiene copolymer latex admixture that is designed as an integral adhesive for cement bond coats, mortars and concrete to improve bond strength and chemical resistance.
  • However, on the basis of calorimetric measurements, concluded that styrene/butadiene latex interacts with dispersed calcium carbonate. Concredamp, produced by the Duresol Corporation, is a commercially available concrete admixture marketed specifically for increasing damping. Concredamp is a vegetable gum suspended in styrene-butadiene rubber (SBR) latex. The gum results from soybean oil reacted with sulfur monochloride.
  • OMNOVA Solutions announced a price increase of $0.12 per dry pound on styrene butadiene (SB) latex for carpet and related markets, effective February 18, 2012. This increase is driven by the escalation in raw material costs utilized to manufacture SB latex products and is in addition to previously announced increases.

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