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AssigneeCanon Kabushiki Kaisha
InventorsTatsuki Fukui, Tetsuya Yano, Chieko Mihara, Shinya Kozaki, Tsutomu Honma, Takashi Kenmoku
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A novel polyhydroxyalkanoate having a monomer unit represented by the formula (1), the unit having a carboxyl group substituting a ring structure at the end of side chain, obtainable by oxydizing vinyl or methyl group substituting a ring structure at the end of the side chain. The polyhydroxyalkanoate has high thermal stability, charge stablity, a high charge amount, improved dispersibility and biodegradability together, and therefore, suitable for resin moldings, and binders and charge controlling agents for toners used in the electrophotographic process.
A polyhydroxyalkanoate containing in a molecule thereof one or more 3-hydroxy-ω-(4-carboxyphenyl)alkanoic acid units represented by a chemical formula (1):
A resin composition comprising a resin (A) and a thermoplastic resin (B), the resin (A) being a polyhydroxyalkanoate that contains, in a polymer molecule thereof, at least one kind of unit of the 3-hydroxy-ω-(4-carboxyphenyl)alkanoic acid units represented by the chemical formula (1):
A charge controlling agent for controlling a charged state of powder and granular materials, the agent comprising a polyhydroxyalkanoate that has at least one kind of unit selected from the group consisting of the 3-hydroxy-o-(4-carboxyphenyl)alkanoic acid units represented by the chemical formula (1):
A binder resin for forming a resin-based powder and granular material comprising a polyhydroxyalkanoate whose polymer molecule comprises at least one kind of unit selected from the group consisting of the 3-hydroxy-o-(4-carboxyphenyl)alkanoic acid units represented by the chemical formula (1):
Dependencies are inferred from the claim text.