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1. WO2022024792 - POLY(VINYL ALCOHOL)-BASED POLYMER

Publication Number WO/2022/024792
Publication Date 03.02.2022
International Application No. PCT/JP2021/026689
International Filing Date 15.07.2021
IPC
C08F 8/12 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8Chemical modification by after-treatment
12Hydrolysis
C08F 16/06 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
16Homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical
02by an alcohol radical
04Acyclic compounds
06Polyvinyl alcohol
C09K 8/44 2006.1
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
42Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
44containing organic binders only
CPC
C08F 16/06
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
16Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical
02by an alcohol radical
04Acyclic compounds
06Polyvinyl alcohol ; ; Vinyl alcohol
C08F 8/12
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8Chemical modification by after-treatment
12Hydrolysis
C09K 8/44
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
42Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
44containing organic binders only
Applicants
  • デンカ株式会社 DENKA COMPANY LIMITED [JP]/[JP]
Inventors
  • 山下 明宏 YAMASHITA,Akihiro
Agents
  • アクシス国際特許業務法人 AXIS PATENT INTERNATIONAL
Priority Data
2020-13122631.07.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) POLY(VINYL ALCOHOL)-BASED POLYMER
(FR) POLYMÈRE À BASE D'ALCOOL POLYVINYLIQUE
(JA) ポリビニルアルコール系重合体
Abstract
(EN) A poly(vinyl alcohol)-based polymer (PVA) having satisfactory unsusceptibility to high-temperature dissolution is provided. The PVA is obtained by saponifying any of a homopolymer obtained from a vinyl ester monomer, a copolymer of a vinyl ester monomer and a monofunctional monomer which is not a vinyl ester, a copolymer of a vinyl ester monomer and a polyfunctional monomer, and a copolymer of a vinyl ester monomer, a monofunctional monomer which is not a vinyl ester, and a polyfunctional monomer. A 0.4 mass% aqueous solution of the PVA, in a dynamic light scattering examination at a temperature of 25°C, gives a particle size distribution in which the particle diameter at 50% cumulative frequency is 50 nm or larger.
(FR) L'invention concerne un polymère à base de poly(alcool vinylique) (PVA) ayant une insensibilité satisfaisante à une dissolution à haute température. Le PVA est obtenu par saponification de l'un quelconque d'un homopolymère obtenu à partir d'un monomère d'ester vinylique, d'un copolymère d'un monomère d'ester vinylique et d'un monomère monofonctionnel qui n'est pas un ester vinylique, d'un copolymère d'un monomère d'ester vinylique et d'un monomère polyfonctionnel, et d'un copolymère d'un monomère d'ester vinylique, d'un monomère monofonctionnel qui n'est pas un ester vinylique, et d'un monomère polyfonctionnel. Une solution aqueuse à 0,4 % en masse du PVA, dans un examen de diffusion de lumière dynamique à une température de 25 °C, donne une distribution de taille de particule dans laquelle le diamètre de particule à 50 % de la fréquence cumulée est de 50 nm ou plus.
(JA) 耐高温溶解性が良好なPVAを提供すること。ビニルエステル単量体からなる単独重合体、ビニルエステル単量体とビニルエステル以外の単官能性単量体との共重合体、ビニルエステル単量体と多官能性単量体との共重合体、又はビニルエステル単量体とビニルエステル以外の単官能性単量体と多官能性単量体との共重合体の、鹸化によって得られるポリビニルアルコール系重合体であって、ポリビニルアルコール系重合体の0.4質量%水溶液の、温度25℃での動的光散乱測定による粒度分布の累積頻度50%の粒子径が、50nm以上である。
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