| 摘要 |
PURPOSE: To obtain an adhesive excellent in blocking resistance and the preservability in its aqueous solution state, thus useful as esp. a remoistening adhesive, consisting mainly of a new polyvinyl alcohol-based resin copolymerized with each specific two kinds of modifying components. CONSTITUTION: This adhesive consists mainly of a polyvinyl alcohol(PVA)-based resin (pref. 75mol% or higher in degree of saponification) copolymerized with (A) 0.1-10mol% of an N,N-di-branched alkylacrylamide of formula I [R1 is H or methyl group; R0 is of formula II (R2 to R4 are each H, an alkyl or aryl group; where, at least two of them are not H, and the number of carbon atoms for R2 to R4 totals >=4; (n) is 1-3)] (pref. N,N-diisobutylacrylamide) and (B) 0.1-10mol% of a hydrophilic group-bearing ethylenic monomer (e.g. ethylenic unsaturated carboxylic acid such as acrylic acid or a salt thereof). This PVA- based resin is normally obtained by saponification of a copolymer obtained by copolymerization between the components A and B and a vinyl ester (pref. vinyl acetate). |
