US 10,308,772 B2 · Method for producing pseudopolyrotaxane aqueous dispersion

Abstract

The present invention provides a method for producing an aqueous dispersion of pseudopolyrotaxane that enables the production, by an industrially advantageous method for an aqueous dispersion of pseudopolyrotaxane in which the inclusion amount of a cyclodextrin does not increase with time and which can provide a crosslinked polyrotaxane having sufficient stretchability and breaking strength. The present invention relates to a method for producing an aqueous dispersion of pseudopolyrotaxane containing pseudopolyrotaxane particles in which a polyethylene glycol is included in a cavity of a cyclodextrin molecule in a skewered manner, the method including: an inclusion step of mixing a polyethylene glycol and a cyclodextrin in an aqueous medium to include the polyethylene glycol in a cavity of a cyclodextrin molecule, wherein in the inclusion step, a basic compound is added.

Claims8

Dependent claims

A method for producing an aqueous dispersion of a pseudopolyrotaxane containing pseudopolyrotaxane particles in which a polyethylene glycol is included in a cavity of a cyclodextrin molecule in a skewered manner,

the method comprising:
an inclusion step of mixing the polyethylene glycol and a molecular cyclodextrin in an aqueous medium to include the polyethylene glycol in the cavity of the cyclodextrin molecule,
wherein the inclusion step includes a mixing step of dissolving the polyethylene glycol and the cyclodextrin in the aqueous medium to prepare a mixed solution, and a cooling step of cooling the mixed solution to precipitate pseudopolyrotaxane particles, and
a basic compound is added after the pseudopolyrotaxane has been precipitated in the cooling step.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/540,520Filed 8 Jan 2016

Priority

JP 2015-0032879 Jan 2015

Published

US 2017/0349711 A17 Dec 2017

Granted

4 Jun 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

C08J 3/03
Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques: in aqueous media
B82Y 5/00
Nanobiotechnology or nanomedicine
C08B 37/0015
Cyclodextrin [CD], e.g. cycle with 6 units , with 7 units and with 8 units , large-ring cyclodextrin or cycloamylose with 9 units or more;…:…
C08G 83/007
Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00: polyrotaxanes; Polycatenanes

Method for producing pseudopolyrotaxane aqueous dispersion

Life of this patent

Method for producing pseudopolyrotaxane aqueous dispersion

Life of this patent

Abstract

Claims8