Thermo-expansive microcapsules and their application

Details Thermo-expansive microcapsules and their application Thermo-expansive microcapsules and their application

2006-01-10

2006-01-10

Schilling, Richard L. (Department: 1752)

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

C264S004700, C430S138000, C428S402220, C521S056000, C521S060000

Reexamination Certificate

active

06984347

ABSTRACT:
Thermo-expansive microcapsules comprising a shell of a polymer produced by polymerizing a mixture of monomers, which comprises (I) a nitrile monomer, (II) a monomer having an unsaturated double bond and carboxyl groups in a molecule, (III) a monomer having two or more of polymerizable double bonds in a molecule, and optionally, (IV) a monomer different from and copolymerizable with the monomers (I), (II) and (III) and a blowing agent encapsulated in the shell. The volume retention of the expanded microcapsules of the thermo-expansive microcapsules is 50% or more after loaded with 15 MPa.

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