A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To provide PVA based polymer excellent in dissolubility at high temperature.SOLUTION: Polyvinyl alcohol based copolymer is produced through saponification of single polymer made of vinylester single monomer; copolymer made of vinylester single monomer and monofunctional monomer other than vinylester; copolymer made of vinylester monomer and polyfunctional monomer; or copolymer made of vinylester monomer, monofunctional monomer other than vinylester monomer, and polyfunctional monomer, wherein particle sizes of cumulative frequency 50% of rain size distribution of measured through dynamic light scattering measurement at a temperature, 25°C of 0.4 mass% aqueous solution of polyvinyl alcohol based polymer are 50 nm or more.SELECTED DRAWING: Figure 1
【課題】耐高温溶解性が良好なＰＶＡを提供すること。【解決手段】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。【選択図】図１
To provide PVA based polymer excellent in dissolubility at high temperature.SOLUTION: Polyvinyl alcohol based copolymer is produced through saponification of single polymer made of vinylester single monomer; copolymer made of vinylester single monomer and monofunctional monomer other than vinylester; copolymer made of vinylester monomer and polyfunctional monomer; or copolymer made of vinylester monomer, monofunctional monomer other than vinylester monomer, and polyfunctional monomer, wherein particle sizes of cumulative frequency 50% of rain size distribution of measured through dynamic light scattering measurement at a temperature, 25°C of 0.4 mass% aqueous solution of polyvinyl alcohol based polymer are 50 nm or more.SELECTED DRAWING: Figure 1
【課題】耐高温溶解性が良好なＰＶＡを提供すること。【解決手段】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。【選択図】図１
POLYVINYL ALCOHOL BASED POLYMER
ポリビニルアルコール系重合体
YAMASHITA AKIHIRO (author)
2024-10-01
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
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LIME
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C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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C09K
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