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US 9,249,269 B2Granted
Foam composition
AssigneeBASF SE
InventorsIan Stuart Biggin, Martin Peter Butters, Anne Frances Hooley
Life of this patent
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Abstract
A foam composition comprising, A) a cellulose foam matrix, and B) particles of encapsulated organic phase change material which are distributed within the cellulose foam matrix. The invention also relates to a method for making the foam composition and also their use in thermal storage applications, such as air-conditioning units.
Claims19
An article comprising a foam and a covering material wherein said covering material comprises aluminum foil and said foam comprises
- A) a cellulose foam matrix formed predominantly from Cellulose II, and wherein at least 50% of hydroxyl groups on the cellulose exist as free hydroxyl groups, and
- B) particles of encapsulated organic phase change material distributed within the cellulose foam matrix,
- wherein the foam has a pore size distribution such that substantially all of particles (B) are absorbed into the foam,
- the volume mean diameter of particles (B) when in the form of an aqueous dispersion is between 0.2μm and 50 μm, and
- the foam has a volumetric enthalpy of at least 70 kJ/liter.
2 more elements
Dependencies are inferred from the claim text.