US 9,315,710 B2 · Plastic phase change material and articles made therefrom

Abstract

The present invention generally relates to a method for manufacturing phase change material (PCM) pellets. The method includes providing a melt composition, including paraffin and a polymer. The paraffin has a melt point of between about 10° C. and about 50° C., and more preferably between about 18° C. and about 28° C. In one embodiment, the melt composition includes various additives, such as a flame retardant. The method further includes forming the melt composition into PCM pellets. The method further may include the step of cooling the melt to increase the melt viscosity before pelletizing. Further, PCM compounds are provided having an organic PCM and a polymer. Methods are provided to convert the PCM compounds into various form-stable PCMs. A method of coating the PCMs is included to provide PCMs with substantially no paraffin seepage and with ignition resistance properties.

Claims55

Dependent claims

A plastic phase change material (PCM) pellet comprising:

a pellet comprising a mixture of a paraffin and a polymer;
and
two coating layers on the pellet comprising an inner coating and an outer coating,
where at least one of the two coating layers is a flame retardant;
wherein
the paraffin is from about 50 wt % to about 90 wt % of the combined weight of paraffin and polymer;
the polymer is uncrosslinked high density polyethylene with a melt flow index between about 0.1 g/10 min and about 20 g/10 min;
and
the plastic PCM pellet has a latent heat falling in the range of about 60 J/g to about 160 J/g.

6 more elements

Dependencies are inferred from the claim text.

Plastic phase change material and articles made therefrom

Life of this patent

Plastic phase change material and articles made therefrom

Life of this patent

Abstract

Claims55