Temperature regulating polyurethane gels

A temperature regulating polyurethane gel composition, comprising a non-exuding phase change material (PCM), selected from the group consisting of fatty acid esters and mixtures thereof, directly incorporated within a polyol dispersing phase of a polyurethane gel composition, wherein the temperature regulating polyurethane gel composition has a phase change temperature, that is both the melting temperature and the crystallisation temperature, that ranges from −20° C. to +50° C. and wherein a fluid expanding a gel network is provided by the polyol component which comprises one or more long chain polyether polyols,

• wherein the isocyanate component comprises one or more isocyanates with a reactive functionality from 1.5 to 3.5,
• wherein the PCM is directly incorporated into a fluid phase of the polyurethane gel without encapsulation,
• wherein the one or more long chain polyether polyols is an alkylene oxide polyether polyol produced by the addition of alkylene epoxide to a starting component comprising reactive hydrogen, selected from the group consisting of a propylene oxide polyether polyol with a number average molecular weight above 1900 and a propylene oxide/ethylene oxide polyether polyol with up to 25 wt. % of ethylene oxide (EO) and with a number average molecular weight above 1900,
• wherein the PCM is selected from the group consisting of fatty acid monoesters and mixtures thereof,
• wherein a single phase polyol component PCM mixture with complete miscibility between the polyol component and the PCM without phase separation.