Process for production of thermally expandable beads and application thereof
作者： Kenichi Kitano , Hiroki Naito , Satoshi Kawanami , Katsushi Miki , Ikuo Yosejima
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摘要: The invention provides a process for the production of thermally expandable beads which exhibit high expansion ratio and give hollow fine particles excellent in resistance to repeated compression through thermal application thereof. A are each constituted both shell made thermoplastic resin blowing agent that is enveloped has boiling point not higher than softening resin, comprises step polymerizing polymerizable component an aqueous medium where dispersed presence oxygen-containing aluminum salt and/or hydrate thereof at least one water-soluble compound selected from among polyalkylene imines have molecular weights 1000 or above bear structure alkyl group substituted with hydrophilic functional between carboxylic acid (salt) phosphonic nitrogen atom attached group.
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