LOW PH SOY FLOUR-NON UREA DILUENT AND METHODS OF MAKING SAME
The present invention provides an improved composition of soy with a non-urea diluent at a pH of less than 5.0, having improved viscosity stability with excellent wet and dry strengths, with more efficient production and lower production costs. Optionally, the composition may also include adding a crosslinking agent, additional diluent or both to the soy-non urea diluent adhesive and/or adding an emulsified or dispersed polymer.
1 . A stable adhesive composition comprising non-urea diluent and soy flour in water wherein the pH is less than 5.0 and wherein no urea is added to the composition.
2 . The composition of claim 1 further comprising a crosslinking agent.
3 . The composition of claim 2 wherein the amount of the crosslinking agent in the composition is 0.1 to 80% solids based on the total dry weight.
4 . The composition of claim 2 wherein the crosslinking agent comprises a formaldehyde-free crosslinking agent selected from the group consisting of isocyanate, polyamine epichlorohydrin resin, polyamidoamine-epichlorohydrin resin, polyalkylene polyamine-epichlorohydrin, amine polymer-epichlorohydrin resin epoxy, aldehyde, aldehyde starch, dialdehyde starch, glyoxal, urea glyoxal, urea-aldehyde resin and mixtures thereof.
5 . The composition of claim 2 wherein the crosslinking agent comprises an isocyanate.
6 . The composition of claim 2 wherein the crosslinking agent comprises a polymeric methylene diphenyl diisocyanate.
7 . The composition of claim 2 wherein the crosslinking agent comprises a polyamidoamine-epichlorohydrin resin.
8 . The composition of claim 2 wherein the crosslinking agent comprises a formaldehyde-containing crosslinking agent selected from the group consisting of formaldehyde, phenol formaldehyde, melamine formaldehyde, urea formaldehyde, melamine urea formaldehyde, phenol resorcinol formaldehyde and any combination thereof.
9 . The composition of claim 1 further comprising the addition of an emulsion polymer.
10 . The composition of claim 9 wherein the amount of the emulsion polymer in the composition is from 0.1 to 80% by dry weight based on the total dry weight.
11 . The composition of claim 9 wherein the emulsion polymer comprises a polyvinyl acetate (PVAc).
12 . The composition of claim 1 further comprising a diluent.
13 . The composition of claim 12 , wherein the diluent is selected from the group consisting of glycerol, ethylene glycol, propylene glycol, neopentyl glycol, polymeric versions thereof and combinations thereof.
14 . The composition of claim 12 , wherein the diluent is glycerol.