<b>QB -50M</b> by <b>Longhui Qunfeng Chemical Company</b> is a polyvinyl butyral resin (PVB). It is a white colored powder. <b>QB -50M</b> by <b>Longhui Qunfeng Chemical Company</b> is used in special adhesives.
<b>QB -60H</b> by <b>Longhui Qunfeng Chemical Company</b> is a polyvinyl butyral resin (PVB). It is a white colored powder. <b>QB -60H</b> by <b>Longhui Qunfeng Chemical Company</b> is suitable for use in special adhesives.