Aqueous stripping composition for metal surfaces
AssigneeEnthone Inc.
InventorFrank Noffke
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Abstract
The invention relates to an aqueous stripping composition for the removal of polymeric surface sealants on metal surfaces, said stripping composition comprising an alkalizing agent, a polymer splitting agent, a swelling agent, and a cloud point booster, wherein said polymer splitting agent is at least one gluconate wherein said swelling agent is at least one compound selected from the group consisting of glycol ethers and aliphatic alcohols having 3 to 9 carbon atoms. The inventive aqueous stripping composition is capable to remove polymeric sealants like e.g. polyurethane sealants, polyethylene sealants, polyethylene waxes, polyacrylic sealants, polysilicate sealants, and the like.
Claims25
-16. (canceled)
A method for the removal of polymeric surface sealants from a metal surface, the method comprising:
- contacting the metal surface having polymeric surface sealants thereon with an aqueous stripping composition, the stripping composition comprising an alkalizing agent, a polymer splitting agent, a swelling agent, and a cloud point booster, wherein said polymer splitting agent comprises at least one gluconate and wherein said swelling agent comprises at least one compound selected from the group consisting of glycol ethers and mono-alcohols having 3 to 9 carbon atoms;
- and
- rinsing the metal surface following contact with the aqueous stripping composition;
- wherein the metal surface is a zinc surface, a zinc alloy surface, or a steel surface;
- and
- wherein the polymeric surface sealant is a sealant of the group consisting of polyurethane sealant, polyethylene sealant, polyethylene wax, polyacryl sealant, polysilicate sealant.
An aqueous stripping composition for the removal of polymeric surface sealants on metal surfaces, said stripping composition comprising an alkalizing agent, a polymer splitting agent, a swelling agent, and a cloud point booster, wherein said polymer splitting agent is at least one gluconate and wherein said swelling agent is at least one compound selected from the group consisting of glycol ethers and mono-alcohols having 3 to 9 carbon atoms, the composition additionally comprising a surfactant.
An aqueous stripping composition for the removal of polymeric surface sealants on metal surfaces, said stripping composition comprising an alkalizing agent, a polymer splitting agent, a swelling agent, and a cloud point booster, wherein said polymer splitting agent is at least one gluconate and wherein said swelling agent is at least one compound selected from the group consisting of glycol ethers and mono-alcohols having 3 to 9 carbon atoms, wherein the could point booster is a naphthyl sulfopropyl diether according to formula II
- wherein m=1 to 11, and n=1 to 17 and M is at least one metal selected from the group consisting Li, Na, K.
Dependencies are inferred from the claim text.