Remoistenable pre-applied adhesive
View Patent ↗A pre-applied, remoistenable adhesive useful in bonding wood substrates together.
1. A water remoistenable adhesive system which, having been applied to a wood substrate and allowed to dry, is capable, upon reactivation with moisture, of bonding the wood substrate to a second substrate, said adhesive system comprising a two component system wherein a first component comprises a crosslinkable polymer and a water soluble polymer and wherein a second component comprises a water soluble polymer and a crosslinking agent.
2. The adhesive of claim 1 wherein said first component comprises a crosslinkable acetate polymer and a water-soluble polymer and wherein said second component comprises a water soluble polymer and a crosslinking agent.
3. The adhesive of claim 2 wherein the crosslinkable acetate copolymer is a vinyl acetate copolymer.
4. The adhesive of claim 3 wherein the crosslinkable copolymer is N-methylol acrylamide vinyl acetate copolymer.
5. The adhesive of claim 2 wherein said second component further comprises a non-crosslinkable acetate polymer.
6. The adhesive of claim 5 wherein said non-crosslinkable acetate polymer is vinyl acetate homopolymer.
7. The adhesive of claim 5 wherein the non-crosslinkable acetate polymer is a vinyl acetate copolymer.
8. The adhesive of claim 2 wherein the water soluble polymer is a polyvinyl alcohol.
9. The adhesive of claim 6 wherein said first component comprises a N-methylol acrylamide vinyl acetate polymer and polyvinyl alcohol and said second component comprises a vinyl acetate homopolymer, a polyvinyl alcohol and a crosslinking agent.