POLYVINYL ALCOHOL COMPOSITION

• Main Authors: KATAYAMA TETSUYA, IGARASHI KAZUNARI
• Format: Patent
• Language: English
• Published: 23.02.1999
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; IMPREGNATING OR COATING OF PAPER; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To obtain a composition which emits less odor of the constituent polyvinyl alcohol, especially an odor called a fish odor and originating in a lower amine compound by mixing a polyvinyl alcohol having cationic groups in the molecule with a specified amount of a water-soluble metal sulfate. SOLUTION: It is desirable that the cation-modified polyvinyl alcohol has a content of cationic groups present in the molecule of 0.01-20 mol.% in terms of structural units, a degree of saponification of 70-100 mol.% and a degree of polymerization of 200-30,000. The water-soluble metal salt may be anything that itself is odorless and is water-soluble and colorless. Above all, from the viewpoint of safety and noncorrosiveness to equipment, it is desirably aluminum potassium sulfate or aluminum sodium sulfate. The mixing ratio is such that it is used in an amount of at most 10 pts.wt. per 100 pts.wt. cation-modified polyvinyl alcohol. There is no particular limitation on the method for producing the composition. Also, various additives may be added to the composition within the scope not detrimental to the effect.