FROZEN AND THAWED HYDROGEL, PRODUCTION METHOD THEREFOR, OPHTHALMIC MEDICAL DEVICE, AND CONTACT LENS

Title:

FROZEN AND THAWED HYDROGEL, PRODUCTION METHOD THEREFOR, OPHTHALMIC MEDICAL DEVICE, AND CONTACT LENS

Document Type and Number:

WIPO Patent Application WO/2024/034610

Kind Code:

A1

Abstract:

This frozen and thawed hydrogel comprises a modified polyvinyl alcohol, and a drug. This method for producing a frozen and thawed hydrogel comprises: executing, at least twice, a freezing and thawing cycle in which a composition containing water, a modified polyvinyl alcohol, and a drug is cooled to a temperature of at most -5°C to be frozen, and the frozen composition is heated to a temperature of at least 5°C to be thawed.

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Inventors:

MANDAI SHUSAKU (JP)
FURO CHIZUKO (JP)
KANAMORI YUYA (JP)
ISOBE JUN (JP)

Application Number:

PCT/JP2023/028930

Publication Date:

February 15, 2024

Filing Date:

August 08, 2023

Export Citation:

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Assignee:

MITSUBISHI CHEM CORP (JP)

International Classes:

A61K9/00; A61F9/007; A61K9/06; A61K47/32; A61L27/18; A61L27/52; A61L27/54; A61L31/14; A61L31/16; A61P27/02; C08J3/075; G02B1/04; G02C7/04

Domestic Patent References:

WO2021157625A1	2021-08-12
WO2021132303A1	2021-07-01

Foreign References:

JP2019089962A	2019-06-13
JPH0873691A	1996-03-19
JP2003048841A	2003-02-21

Attorney, Agent or Firm:

TAZAKI Akira et al. (JP)

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