Expandable starch beads and method for preparing the same

摘要

Provided is expandable starch beads including a starch-monomer copolymer and a foaming agent impregnated in the starch-monomer copolymer, in which the starch-monomer copolymer is prepared by bonding at least one monomer selected from the group consisting of styrene, α-methylstyrene, lactide, lactic acid, acrylic acid, methacrylic acid, acrylic ester, methacrylic ester, acrylonitrile, acrylamide, and caprolactone to starch, and the foaming agent includes at least one selected from the group consisting of C2 to C7 aliphatic hydrocarbon, C2 to C7 halogenated hydrocarbon, and carbon dioxide. Since the expandable starch beads have the similar properties to expandable polystyrene beads, and thereby can be foam-molded by equipment for foaming the expandable polystyrene beads, it is possible to produce foams with various sizes and various shapes.

主权项

1. Expandable starch beads, comprising a starch-monomer copolymer and a foaming agent impregnated in the starch-monomer copolymer,
the starch-monomer copolymer being prepared by bonding at least one monomer selected from the group consisting of styrene, α-methylstyrene, lactide, lactic acid, acrylic acid, methacrylic acid, acrylic ester, methacrylic ester, acrylonitrile, acrylamide, and caprolactone to starch, and the foaming agent including at least one selected from the group consisting of C2 to C7 aliphatic hydrocarbon, C2 to C7 halogenated hydrocarbon, and carbon dioxide.