Peel-treating agent and method for producing the peel-treating agent
AssigneeHodogaya Chemical Co., Ltd.
InventorsNobuo Kaifu, Hiroshi Satoh
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Abstract
A peel-treating agent comprising a reaction product of an aliphatic isocyanate having an aliphatic group of at least 8 carbon number with an ethylene/vinyl alcohol copolymer or polyvinyl alcohol as an effective component, wherein a bisurea form content in the reaction product is at most 3 wt %.
Claims18
A method for producing a peel-treating agent comprising a reaction product of an aliphatic isocyanate having an aliphatic group of at least 8 carbon number with an ethylene/vinyl alcohol copolymer or polyvinyl alcohol as an effective component, wherein a bisurea form content in the reaction product is at most 3 wt %, which comprises adjusting a particle size of the ethylene/vinyl alcohol copolymer or polyvinyl alcohol to no larger than particles that would pass through a sieve of size 10 mesh, subjecting to a dehydration operation to reduce water content and then reacting the adjusted ethylene/vinyl alcohol copolymer or polyvinyl alcohol with the aliphatic isocyanate.
A method for producing a peel-treating agent comprising a reaction product of an aliphatic isocyanate having an aliphatic group of at least 8 carbon number with an ethylene/vinyl alcohol copolymer or polyvinyl alcohol as an effective component, wherein a bisurea form content in the reaction product is at most 3 wt %, which comprises adjusting a particle size of the ethylene/vinyl alcohol copolymer or polyvinyl alcohol to no larger than particles that would pass through a sieve of size 10 mesh, subjecting to azeotropic dehydration operation to reduce water content and then reacting the adjusted ethylene/vinyl alcohol copolymer or polyvinyl alcohol with the aliphatic isocyanate.
Dependencies are inferred from the claim text.