CVC Thermoset Specialties has introduced Hypro 1200X90 HTB, the newest addition to its Hypro Reactive Liquid Polymer product line based on hydroxy-functional polybutadiene (HTPB) technology. Launched in 2011, the HTPB technology platform not only expands the range of materials offered by the company, but the diol reactive end groups also enable the reactive liquid polymers (RLPs) to be used in polyurethane systems, a growing market for RLPs. Hypro 1200X90, when used in elastomeric polyurethanes, offers final products that exhibit high hydrophobicity due to the polybutadiene backbone. This is an especially important feature for water-resistant applications. In comparison to Hypro 2800X95 HTB, the first product in the series introduced last year, Hypro 1200X90 HTB is lower in molecular weight and, consequently, lower in viscosity and higher in hydroxyl value. Hypro 1200X90 is well suited for the production of elastomeric polyurethanes that exhibit excellent hydrolytic stability and outstanding low temperature flexibility due to its low Tg.  These properties, along with excellent electrical insulation, are desirable features in applications such as potting and encapsulation, adhesives and sealants, waterproof coatings and membranes the company said.