Heat-sealable aqueous resin composition, film, laminate, and method for producing heat-sealable aqueous resin composition

• Main Authors: KURODA KAITO, OKADA KEISUKE, SATO TERUAKI, MATSUMOTO MAYU
• Format: Patent
• Language: Chinese; English
• Published: 07.03.2023
• 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

The invention provides a heat-sealable aqueous resin composition, a film, a laminate, and a method for producing the heat-sealable aqueous resin composition. A heat-sealable aqueous resin composition comprising: a rosin-based resin (A); a biodegradable resin (B) containing a resin having a structure represented by general formula (1) and/or a resin (b1) having a structure represented by general formula (2); and a polyvinyl alcohol (C) having an average degree of saponification of 75-85 mol%, and the content of component (b1) exceeds 50 mass% when the total content of component (A) and component (B) is 100 mass%. General formula (1):-O-(CH2) x-O-CO-(CH2) y-CO-(in general formula (1), x and y may be different from each other and are integers of 1 to 10 inclusive) general formula (2):-O-(CH2) z-CO-(in general formula (2), z is an integer of 3 to 10 inclusive). 本公开提供一种热封性水系树脂组合物、膜、层叠体及热封性水系树脂组合物的制造方法。热封性水系树脂组合物，包含：松香系树脂(A)；生物降解性树脂(B)，包含具有通式(1)的结构的树脂和/或具有通式(2)的结构的树脂(b1)；及聚乙烯醇(C)，平均皂化度为75mol％以上且85mol％以下，在将(A)成分及(B)