Articles containing precisely branched functional polymeric phase change materials
AssigneeOutlast Technologies, Inc.
InventorsMark Hartmann, David E. Henton
Life of this patent
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Abstract
A temperature regulating article comprises a substrate and a polymeric phase change material bound to the substrate, wherein the polymeric phase change material is characterized by including a precisely branched polymer with substantially equally spaced repeating sidechains. In other embodiments the polymeric phase change material includes between 20 and 200 branches per 1000 carbon units, has a latent heat of at least 5 Joules per gram, and a transition temperature between 0° C. and 40° C.
Claims25
A temperature regulating article comprising:
- a substrate;
- and
- a temperature regulating composition bound to the substrate;
- wherein the temperature regulating composition comprises
- a polymeric phase change material bound to the substrate, wherein the polymeric phase change material includes a branched polymer with equally spaced repeating sidechains each separated by at least three carbon backbone atoms, wherein the number of carbon backbone atoms between sidechains controls a degree of crystallization of the polymeric phase change material at a given transition temperature, wherein the polymeric phase change material includes between 20 and 200 branches per 1000 carbon atoms,
- wherein the polymeric phase change material has a latent heat of at least 5 Joules per gram and a transition temperature between 0° C. and 40° C. dependent upon the number of carbon backbone atoms between sidechains, and
- wherein the sidechains are selected from the group consisting of CH3, C2H5, CnH2n+1, OCH3, and OC2H5.
A temperature regulating composition, comprising:
- a polymeric phase change material, wherein the polymeric phase change material includes a branched polymer with equally spaced repeating sidechains each separated by at least three carbon backbone atoms, wherein the number of carbon backbone atoms between sidechains controls a degree of crystallization of the polymeric phase change material at a given transition temperature, wherein the polymeric phase change material includes between 20 and 200 branches per 1000 carbon atoms,
- wherein the polymeric phase change material has a latent heat of at least 5 Joules per gram and a transition temperature between 0° C. and 40° C. dependent upon the number of carbon backbone atoms between sidechains, and
- wherein the sidechains are selected from the group consisting of CH3, C2H5, CnH2n+1, OCH3, and OC2H5.
A temperature regulating composition, comprising:
- a polymeric phase change material, wherein the polymeric phase change material includes a branched polymer with equally spaced repeating sidechains each separated by at least three carbon backbone atoms, wherein the number of carbon backbone atoms between sidechains controls a degree of crystallization of the polymeric phase change material at a given transition temperature, wherein the polymeric phase change material includes between 20 and 200 branches per 1000 carbon atoms,
- wherein the polymeric phase change material has a latent heat of at least 5 Joules per gram and a transition temperature between 0° C. and 100° C. dependent upon the number of carbon backbone atoms between sidechains, and
- wherein the sidechains are selected from the group consisting of CH3, C2H5, CnH2n+1, OCH3, and OC2H5.
Dependencies are inferred from the claim text.