Method of producing creping adhesive
This invention is method of producing a creping cylinder adhesive comprising: contacting a dry form PVOH with a liquid form PVA at a temperature of less than 80° C., maintaining the PVOH and PVA at a temperature of between 90-95° C. until the PVOH is completely dissolved into a medium, and allowing the medium to cool to below 80° C.
1. A method of preparing a composition of matter, the method comprising the steps of:
contacting a dry form polyvinyl alcohol (PVOH) with a liquid form vinylamine/N-vinyl formamide copolymer (PVA) at a temperature of less than 80° C.,
raising the temperature of the PVOH and PVA to a temperature ranging from 90° C. to 95° C. and maintaining this temperature until the PVOH is completely dissolved into a medium, and
cooling the medium to below 80° C.
2. The method of claim 1 , wherein the dry form is selected from the group consisting of a powder, a solid block, a shaving, a grinding, a slice, a molding, congealed matter and any combination thereof.
3. The method of claim 1 , wherein the liquid form is selected from the group consisting of: a solution, a dispersion, an emulsion, a suspension, and any combination thereof.
4. The method of claim 1 , wherein the medium is water.
5. The method of claim 1 , further comprising the step of adding, after the medium has cooled, an additive selected from the list consisting of: a water-soluble polyol, a preservative, a functional additive, water, and any combination thereof.
6. The method of claim 1 , wherein the PVA was prepared by polymerizing N-vinylformamide monomers and then hydrolyzing at least one amide group of the resulting polymer with an acid or a base, wherein the PVA comprises about 1 to 99 mole percent vinylamine monomer and about 99 to about 1 mole percent N-vinyl formamide monomer.
7. The method of claim 1 , further comprising adding to the composition after the medium has cooled, an additive selected from the group consisting of: a plasticizer, a humectant, an oxidative stabilizer, an inorganic phosphate, an organic phosphate, a release agent, a lubricant, a corrosion control agent, and any combination thereof.
8. The method of claim 1 , further comprising adding a fluorescent tracer to the composition after the medium has cooled.
9. The method of claim 1 , further comprising adding a crosslinking agent to the composition after the medium has cooled.
10. The method of claim 9 , wherein the crosslinking agent is selected from the group consisting of an epihalohydrin, a dialdehyde diglycidyl ether, and any combination thereof.
11. The method of claim 9 , further comprising adding to the composition an additional polymer selected from the group consisting of: polyvinyl alcohol, polyvinyl acetate, polyaminoamide, polyamide, polyamine, crosslinked polyaminoamide, polyethyleneimine, polyacrylamide, glyoxylated polyacrylamide, polyacrylate, polymethylmethacrylate, starch, carboxymthylcellulose, polyether, vinyl amine/acrylamide copolymer, vinylamine/acrylate copolymer, polyvinylpyrrolidone, synthetic protein, natural protein, and any combination thereof.
12. The method of claim 1 , further comprising adding a polymer selected from the group consisting of: polyaminoamide, polymide, polyamine, polyethyleneimine, polyacrylamide, glyoxylated polyacrylamide, polyacrylate, polymethylmethacrylate, starch, carboxymthylcellulose, polyether, vinyl amine/acrylamide copolymer, vinylamine/acrylate copolymer, polyvinylpyrrolidone, synthetic protein, natural protein, and any combination thereof,
wherein the polymer is added before cooling the medium.
13. The method of claim 1 , wherein essentially all of the PVOH and PVA have remained in a same liquid phase for over 8 months.
14. The method of claim 1 , further comprising adding to the composition, after the medium has cooled, an additive selected from the group consisting of: a dialkyl imidazolinium quaternary salt, a dialkyl diamidoamine quaternary salt, a monoalkyl trimethylammonium quaternary salt, a dialkyl dimethylammonium quaternary salt, a trialkyl monomethylammonium quaternary salt, an ethoxylated quaternary salt, a dialkyl and trialkyl ester quaternary salt, a polysiloxanes, a quaternary silicone, an organoreactive polysiloxane, an amino-functional polydimethylsiloxane, and any combination thereof.
15. The method of claim 1 , further comprising adding a polymer to the medium selected from the group consisting of: polyvinyl alcohol, polyvinyl acetate, polyaminoamide, polyamide, polyamine, polyethyleneimine, polyacrylamide, glyoxylated polyacrylamide, polyacrylate, polymethylmethacrylate, starch, carboxymthylcellulose, polyether, vinyl amine/acrylamide copolymer, vinylamine/acrylate copolymer, polyvinylpyrrolidone, synthetic protein, natural protein, and any combination thereof,
wherein the polymer is added after raising the temperature of the PVOH and PVA.
16. The method of claim 5 , wherein the water-soluble polyol is polyglycerol.