Method for producing ethylene-vinyl alcohol copolymer resin, ethylene-vinyl alcohol copolymer resin, and multilayer structure
US8419999B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2011 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | May 13, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/50
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Provided is by the present invention is a method for producing an EVOH resin having sufficient long-run workability in melt molding and enabling prevention of coloring such as yellowing, an EVOH resin obtained by this method for production, and a laminate obtained from this resin.The present invention is a method for producing an ethylene-vinyl alcohol copolymer resin, the method including a step of saponifying an ethylene-vinyl ester copolymer to obtain an ethylene-vinyl alcohol copolymer, in which the method is characterized by further including a step of irradiating the ethylene-vinyl ester copolymer or the ethylene-vinyl alcohol copolymer with an infrared ray.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.