A gas barrier coating composition which undergoes no decrease in barrier properties to gases such as oxygen and water vapor even under high-humidity conditions, contains no compounds thought to be harmful to the human body, and is harmless to the human body; and a gas barrier coating film with excel
A gas barrier coating composition which undergoes no decrease in barrier properties to gases such as oxygen and water vapor even under high-humidity conditions, contains no compounds thought to be harmful to the human body, and is harmless to the human body; and a gas barrier coating film with excellent gas barrier properties comprising the composition. The gas barrier coating composition comprises (a) a polyvinyl alcohol resin and (b) at least one member selected from the group consisting of a specific metal alcoholate, a hydrolysate of the metal alcoholate, a condensate of the metal alcoholate, a chelate compound of the metal alcoholate, a hydrolysate of the chelate compound and an acylated metal compound. The coating film obtained from the composition has excellent gas barrier properties.
대표청구항▼
1. A coating composition comprising (a) ethylene-vinyl alcohol copolymer having a melt flow index of 1 to 50 g/10 minutes under the conditions of 210° C. and a load of 21.168 N and (b) at least one member selected from the group consisting of a condensate of a titanium alcoholate, a chelate compound
1. A coating composition comprising (a) ethylene-vinyl alcohol copolymer having a melt flow index of 1 to 50 g/10 minutes under the conditions of 210° C. and a load of 21.168 N and (b) at least one member selected from the group consisting of a condensate of a titanium alcoholate, a chelate compound of a titanium alcoholate, a hydrolysate of a chelate of a titanium compound and a titanium acylate, wherein said titanium alcoholate is of the formula: R1mTi(OR2)n (1) wherein R1,when multiple R1s exist, they are either identical to or different from each other, represents an organic group having 1 to 8 carbon atoms, R2,when multiple R2s exist, they are either identical to or different from each other, represents an alkyl group having 1 to 5 carbon atoms, an acyl group having 1 to 6 carbon atom or a phenyl group, and m is an integer of 0 or more, n is an integer of 1 or more and m+n is 4. 2. The coating composition according to claim 1, which further contains (c) a nitrogen-containing organic solvent. 3. The coating composition according to claim 1, which further contains (d) fine inorganic particles having an average particle size of 0.2 μm or less. 4. The coating composition according to claim 1, which further contains (e) a boron compound. 5. The coating composition according to claim 1, which has a heating gelation rate of 1 to 90%. 6. A method for producing the coating composition according to claim 1, which comprises hydrolyzing component (b) in water or a mixed solvent containing water and a hydrophilic organic solvent, followed by mixing with component (a). 7. A coating film in which a coating film formed of the coating composition according to claim 1 is laminated onto a synthetic resin film. 8. A coating film in which a vapor-deposited film of a metal and/or an inorganic compound and a coating film formed of the coating composition according to claim 1 are laminated onto a synthetic resin film. 9. The coating film according to claim 8, wherein said vapor-deposited film is a vapor-deposited film of an inorganic oxide by a chemical vapor deposition method and/or a physical vapor deposition method. 10. The coating composition according to claim 1, wherein ethylene-vinyl alcohol copolymer (a) has a content of repeating units derived from ethylene from 20 to 45 mol %. 11. The coating composition according to claim 1, wherein ethylene-vinyl alcohol copolymer (a) is a saponified product having 80 mol % or more degree of saponification. 12. The coating composition according to claim 1, wherein (b) is a member (b) hydrolyzed in water or a mixed solvent containing water and a hydrophilic solvent. 13. The coating composition according to claim 1, wherein (b) is a condensate of a titanium alcoholate. 14. The coating composition according to claim 1, wherein (b) is a chelate compound of a titanium alcoholate. 15. The coating composition according to claim 1, wherein (b) is a hydrolyzate of a chelate of a titanium compound. 16. The coating composition according to claim 1, wherein (b) is a titanium acylate.
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