Polymeric Shell with Low Permeability

Abstract:

A polymeric shell with low permeability was manufactured via a combined process including both an interfacial polymerization and an in-situ condensation. A polyisocyanate, tolylene diisocyanate (TDI) or 1,6-hexamethylenediisocyanate (HDI), was added in the core compositions as a reactive monomer for the formation of both polyurethane wall and polyurea wall. PPG-2,000, a polypropylene glycol, was employed as another reactive monomer to form the polyurethane wall. Melamine-formaldehyde precondensate was prepared and used as the raw material for the aminoplast wall formation. The polymeric shell thus consists of three walls, which includes a polyurethane inner wall, a polyurea middle wall and an aminoplast outer wall. The triple-walled shell has proven to possess low permeability and then wrap the paraffin compounds tightly.

• Periodical: Advanced Materials Research (Volume 441)
• Pages: 484-488
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.441.484
• Online since: January 2012
• Authors: Jian Wei Xing, Cheng Shu Xu, Yan Ren, Wen Zhao Shi, Jin Shu Liu
• Keywords: In Situ Condensation, Interfacial Polymerization, Micapsule, Phase Change Materials (PCM)

References

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[3] SHORT, DUAL-WALLED MICROCAPSULES AND A METHOD OF FORMING SAME, U.S. PATENT 4, 076, 774.