MODIFIED VINYL-ALCOHOL-BASED POLYMER

• Main Authors: KONISHI, Hiroyuki, WATAJIMA, Akihisa, SHIMIZU, Yuki, KOBAYASHI, Sawako
• Format: Patent
• Language: English; French; Japanese
• Published: 21.10.2021
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; CORRECTING FLUIDS; DYES; FILLING PASTES; GENERAL PROCESSES OF COMPOUNDING; HANDLING THIN OR FILAMENTARY MATERIAL; INKS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING-UP

This modified vinyl-alcohol-based polymer is represented by the following formula (I), wherein the contents, a (mol%), b (mol%), and c (mol%), of the respective monomer units with respect to all the monomer units satisfy the following relationships (1)-(3). Such modified vinyl-alcohol-based polymer is excellent in terms of barrier property, water solubility, and melt shapability. Coating materials including said modified vinyl-alcohol-based polymer bring about excellent production efficiency when applied and can form films retaining high water-vapor barrier properties.　(1) 10≤a≤20 (2) 1≤c≤15 (3) [100-(a+c)]×0.9≤b≤[100-(a+c)] [In formula (I), X, Y, and Z each independently represent a hydrogen atom, a formyl group, or an alkanoyl group having 2-10 carbon atoms.] Le polymère à base d'alcool vinylique modifié selon l'invention est représenté par la formule suivante (I), les teneurs, a (% en moles), b (% en moles) et c (% en moles), des motifs monomères respectifs par rapport à tous les motifs monomères satisfaisant aux relations (1) à (3) suivantes. Un tel polymère à base d'alcool vinylique modifié est excellent en termes de propriétés de barrière, de solubilité dans l'eau et de malléabilité à l'état fondu. Des matériaux de revêtement comprenant ledit polymère à base d'alcool vinylique modifié procurent une excellente efficacité de production lorsqu'ils sont appliqués et peuvent former des films conservant des propriétés importantes de barrière à la vapeur d'eau.　(1) 10 ≤ a ≤ 20 (2) 1 ≤ c ≤ 15 (3) [100 - (a +c)] × 0,9 ≤ b ≤ [100 - (a +c)] [dans la formule (I), X, Y et Z représentent chacun indépendamment un atome d'hydrogène, un groupe formyle ou un groupe alcanoyle contenant de 2 à 10 atomes de carbone.] 下記式（Ｉ）で表され、全単量体単位に対する各単量体単位の含有率ａ（モル％）、ｂ（モル％）及びｃ（モル％）が下記式（１）～（３）を満足する、変性ビニルアルコール系重合体とする。このような変性ビニルアルコール系重合体は、バリア性、水溶性及び溶融成形性に優れる。当該変性ビニルアルコール系重合体を用いたコーティング剤は塗工時の生産性に優れるうえに、形成されるフィルムは高い水蒸気バリア性を維持する。　１０≦ａ≦２０　（１）　１≦ｃ≦１５　（２）　［１００－（ａ＋ｃ）］×０．９≦ｂ≦［１００－（ａ＋ｃ）］　（３）［式（Ｉ）中、Ｘ、Ｙ及びＺは、それぞれ独立に水素原子、ホルミル基又は炭素数２～１０のアルカノイル基を表す。］