Preparation and Adhesion Property of a Low Temperature Cross-Linkable Vinyl Acetate-Acrylate Copolymer Latex

Abstract

The functional acrylate monomer (FAM) containing an amino group was synthesized by using glycidyl methacrylate (GMA) and ammonia. FAM was then copolymerized with Vinyl acetate and other acrylate monomers by emulsion copolymerization. The cross-linkable latex was obtained by adding a set content of glutaraldehyde to the earlier copolymer emulsion. The FT-IR results show that the cross-linking reaction between amino and aldehyde groups is detected during the curing process of copolymer. The glass transition temperature (T g ) of the copolymer can be evidently increased from À16.2 to À8.7 C as the FAM alters from 0 to 10%. T-peel strength of the polyethylene-polyethylene (PE-PE) packaging films laminated by products was studied. The results show peel strength dramatically increases with the cross-linking density at room temperature, and still reaches 2.5 N Á 15 mm À1 even at 60 C, which can satisfy the application requirement enough.

Preparation and Characterization of Soap-Free Vinyl Acetate/Butyl Acrylate Copolymer Latex

“…When the emulsifier amount exceeded 3 wt %, superior stability was obtained. The coagulation ratio was used to judge the polymerization stability of the emulsion [26,27]. With the increase of the DNS-86 amount, the coagulation ratio decreases first and then increases.…”

The Relation Between Particle Structure and the Peel Strength of Vinyl Acetate/Acrylate Core-Shell Latexes Laminating Adhesives

“…However, as for conventional emulsion, there are still some deficiencies. A major one is its low peel strength [8,13,14] arising from the competition among film formation, wetting and mechanical film properties [15,16] especially at high temperatures, which limits its further application in the field of adhesives greatly.…”