Butvar polyvinyl butyral resins have a combination of properties that make them a key ingredient in a variety of formulations. Some of these properties for which Butvar is widely used are: outstanding binding efficiency, optical clarity, adhesion to a large number of surfaces, and toughness combined with flexibility. Butvar resins generally are soluble in alcohols, glycol ethers and certain mixtures of polar and non-polar solvents.
|Resin Type||Molecular wt. / Solution viscosity in cp|
|B-73||90-120 / 1,000-4,000|
|B-90||70-100 / 600-1,200|
|B-98||40-70 / 200-400|
|*15% by weight|