Apple Inc.
Polypropylene carbonate and catalysts

Abstract:

The disclosure is directed to an apparatus comprising a substrate and a composition disposed on the substrate. The catalyst comprises a polypropylene carbonate (PPC) and a catalyst selected from the group consisting of an acid with a pKa less than or equal to 1 in water, a phase transfer catalyst, and a metal salt. The substrate and composition can be used in insulators between batteries, for example in a battery pack.