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US 7,732,561 B2Granted
Random copolymers of oxazoline
AssigneeJapan Science and Technology Agency
InventorsKazunori Kataoka, Yuichi Yamasaki, Joon-Sik Park
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Abstract
The invention provides approximately monodispersible random copolymers obtained from monomeric mixtures of 2-ethyl-2-oxazoline with 2-isopropyl-2-oxazoline, production method thereof and 2-isopropyl-2-oxazoline homopolymer obtained by using special initiator. Such polymers exhibit temperature-responsiveness in an aqueous solution within a broad temperature range, and are useful materials in the technical fields of surface chemistry and biomaterials.
Claims4
A production method of a homopolymer represented by the following formula:
- wherein R3 stands for hydrogen or C1-5 alkyl, m stands for an integer of 1-20, and n stands for an integer of 5-10,000,
- which comprises a step of ring-opening polymerizing with 2-isopropyl-2-oxazoline in an inert solvent at 30° C.-50° C. in the presence of a cationic polymerization initiator, a step of reacting the resultant homopolymer with a nucleophilic agent, and, where necessary, a step of isolating the formed homopolymer.
A homopolymer represented by the following formula
- in the formula, R3 stands for hydrogen or C1-5 alkyl, m stands for an integer of 1-20, and n stands for an integer of 5-10,000.
Dependencies are inferred from the claim text.