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About Us

PureTemp is a biobased specialty chemical company with offices in Minneapolis, Minn.

PureTemp LLC, originally known as Entropy Solutions, began producing the world’s first 100 percent renewable phase change material in 2007. These patented PCMs, developed in three years of research sponsored by the U.S. Department of Agriculture, are used in a wide variety of temperature-control applications, from cooling vests and warming blankets to refrigerators and thermal energy storage tanks. Derived from 100 percent sustainable sources such as animal fat and plant oil, PureTemp phase change material is nontoxic and biodegradable. It is engineered to maintain more than 200 different transition temperatures with consistent, repeatable performance.


Sonoco ThermoSafe | Arlington Heights, Ill.

Sonoco ThermoSafe, a unit of Sonoco (NYSE:SON), is a leading global provider of temperature assurance packaging for the safe and efficient transport of pharmaceuticals, biologics, vaccines and other temperature-sensitive products. With operations in North America, Europe and Asia, Sonoco ThermoSafe has a vast product offering featuring industry-leading technology that encompasses refrigerated, frozen or controlled room temperature applications. PureTemp has an exclusive and global relationship with Sonoco ThermoSafe regarding the use of PureTemp PCMs in life science shipping applications. PureTemp phase-change materials have allowed Sonoco ThermoSafe to significantly expand its product and solution offerings for custom and ready-engineered solutions such as Envoy, Certis, Via, and pallet shipper product lines.

Glacier Tek | Minneapolis, Minn.

Glacier Tek offers a wide range of body cooling products powered by PureTemp phase change materials. The company has more than 20 years of experience in PCM containment. Glacier Tek’s first product, the Original Cool Vest, was among the earliest self-contained cooling vests on the market. Since then, Glacier Tek has developed a unique expertise in the encapsulation and packaging of renewable PCMs and expanded its reach into large-scale thermal energy storage.


2018 Finalist, Phase Change Matters blog, PR News Platinum and Agency Elite Awards
2017 Eureka! Innovation Award, Minneapolis/St. Paul Business Journal
2015 First place, blog and newsletter, Digital PR News Awards
2015 USDA Biobased Product Certification
2012 Progress Minnesota Award
2010 Top Environmental Initiative – Cool Chain Europe
2010 DuPont Innovation Award
2009 Top Technology Provider of the Year – Cool Chain Europe
2009 Greener Package Award
2009 Innovator of the Year – Greener Package
ISO 9001: 2008 Certified