Honeywell Enovate® 245fa blowing agent (HFC-245fa, 1,1,1,3,3,-pentafluoropropane) is a liquid hydrofluorocarbon, which has been developed as a blowing agent for rigid insulating foams. It is a replacement for HCFC-141b and other fluorocarbon and nonfluorocarbon blowing agents. Enovate is a nonflammable liquid having a boiling point slightly below room temperature. It is non-ozone-depleting and it is Volatile Organic Compound (VOC) -exempt per the U.S. EPA..

Toxicity
Enovate® is currently listed on the U.S. EPA TSCA Inventory, the European EINECS Inventory, and the Japanese MITI Inventory. Extensive toxicity testing indicates that Enovate is of low toxicity. Overall results from a series of genetic studies indicate that Enovate is non-mutagenic and non-teratogenic. The American Industrial Hygiene Association has established a Workplace Environmental Exposure Level (WEEL) of 300 ppm. Anyone who uses or handles Enovate should carefully review the SDS and product label prior to use.

Environmental
Enovate® blowing agent is a fluorinated hydrocarbon. Follow all applicable regulatory guidelines when treating or disposing of wastes generated from the use of this product. Enovate is not considered a “hazardous waste” by the Resource Conservation and Recovery Act if discarded unused. Care should be taken to avoid releases into the environment. 

Applications 

Enovate has been evaluated in a variety of foam systems and applications. Its superior thermal insulating characteristics, physical properties and compatibility with other materials make it ideal as a blowing agent for rigid polyurethane foams. Enovate replaces HCFC-141b in rigid polyurethane foam applications. Foams formulated with Enovate generally have thermal properties equivalent to those of HCFC-141b foams and better dimensional stability and compressive strength properties. The U.S. EPA has given SNAP approval for the use of Enovate as a replacement in all foam applications. It should be noted that on October 15, 2016, delegates to the Montreal Protocol agreed in Kigali, Rwanda to an historic amendment that adds high-GWP HFCs to the Protocol and establishes schedules for their phase down in developed and developing countries. The accord will further accelerate the adoption of HFC substitutes such as Honeywell’s Solstice® blowing agents (based on HFO technology) used for aerosols, foam insulation, and air conditioning and refrigeration equipment.

Miscibility

As reflected in the statistics below, Enovate has exhibited acceptable miscibility in a wide range of polyols. To determine miscibility, a mixture containing 40 wt.% Enovate and 60 wt.% polyol is prepared in a calibrated miscibility tube. The mixture is thoroughly mixed at an elevated temperature. The tube is then placed in a constant temperature bath for 24 hours. The height of the polyol and the Enovate is measured and the miscibility is calculated.