Title:
VINYL ALOHOL COPOLYMER, METHOD FOR PRODUCING SAME, DEHYDRATION INHIBITOR FOR CEMENT SLURRY, AND METHOD FOR PREVENTING DEHYDRATION OF CEMENT SLURRY
Document Type and Number:
WIPO Patent Application WO/2021/241506
Kind Code:
A1
Abstract:
A vinyl alcohol copolymer which contains a vinyl alcohol unit and a constituent unit derived from an unsaturated monomer (A), wherein: the unsaturated monomer (A) is at least one substance that is selected from the group consisting of unsaturated carboxylic acids, salts thereof, anhydrides thereof and alkyl esters thereof; the content of the constituent unit derived from the unsaturated monomer (A) is from 1.00% by mole to 5.00% by mole relative to all constituent units of the vinyl alcohol copolymer; and 70% by mole or more of the constituent unit derived from the unsaturated monomer (A) forms a lactone ring structure.
Inventors:
GHEBREMESKEL GHEBREHIWET (US)
MORIKAWA KEISUKE (US)
KANESHIMA TAKUMA (US)
MORIKAWA KEISUKE (US)
KANESHIMA TAKUMA (US)
Application Number:
PCT/JP2021/019636
Publication Date:
December 02, 2021
Filing Date:
May 24, 2021
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08F8/16; C08F216/06; C09K8/44
Domestic Patent References:
| WO2015037672A1 | 2015-03-19 | |||
| WO2018225742A1 | 2018-12-13 |
Foreign References:
| JPS4936797A | 1974-04-05 | |||
| JPS4987811A | 1974-08-22 | |||
| JPH01193306A | 1989-08-03 | |||
| JP2019014881A | 2019-01-31 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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