Patent ID: 9650556
Date: 2017-05-16
CPC Classifications: C09K,F28D,Y02E,Y10T

Claim:
1. A method of encapsulating microcapsules containing phase change material, comprising: supplying a phase change material comprising an inorganic salt selected from nitrates, nitrites, and hydroxides of potassium, lithium and combinations thereof, having a melting point of 200° C. to 600° C., and a largest cross-sectional dimension of 0.5 mm to 100 mm; applying a coating to said phase change material wherein said coating includes an inorganic binder, a film former comprising an organic polymer at a MW of greater than or equal to 5000, and an inorganic filler at a particle size of less than or equal to 50 μm and wherein said coating has a thickness of 50 μm to 1000 μm; and heating said coating at a temperature in the range 200° C. to 400° C. wherein at least a portion of said organic polymer of said film former is removed to form said microcapsules, wherein from 0% to 5% of said microcapsules rupture at temperatures of 200° C. to 600° C.