Invention Grant
- Patent Title: Vinyl alcohol polymer and cement slurry comprising same
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Application No.: US16826133Application Date: 2020-03-20
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Publication No.: US10995252B2Publication Date: 2021-05-04
- Inventor: Akihiro Yamashita , Kosuke Watanabe
- Applicant: DENKA COMPANY LIMITED
- Applicant Address: JP Tokyo
- Assignee: DENKA COMPANY LIMITED
- Current Assignee: DENKA COMPANY LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Caesar Rivise, PC
- Priority: JPJP2018-029581 20180222
- Main IPC: C09K8/44
- IPC: C09K8/44 ; C04B24/26 ; C08F218/08 ; C08F218/04 ; C09K8/487
Abstract:
Provided is a vinyl alcohol polymer having good fluid loss reducing performance. The vinyl alcohol polymer is a saponified product of a copolymer of a vinyl ester monomer and a multifunctional monomer, and has a degree of saponification of 70 to 95 mol % and a viscosity-average degree of polymerization of 1000 to 10000.
Public/Granted literature
- US20200224076A1 VINYL ALCOHOL POLYMER AND CEMENT SLURRY COMPRISING SAME Public/Granted day:2020-07-16
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