Claims
- 1. An aqueous activating composition to be added to an aqueous alkaline solution for the removal of coatings or finishes at elevated temperatures consisting essentially of:
- A. At least one of the following activator constituents
- (i) An ethoxylated compound of the formula R'O(CH.sub.2 CH.sub.2 O).sub.n H wherein R' is tetrahydrofurfuryl and n is about 0.5 to 10;
- (ii) A mixture of the ethoxylated compound of the formula
- R'O(CH.sub.2 CH.sub.2 O).sub.n H
- wherein R' is tetrahydrofurfuryl and n is about 0.5 to about 10 and an ethoxylated compound of the formula
- R"O(CH.sub.2 CH.sub.2 O).sub.n H
- wherein R" is furfuryl and n is about 0.5 to about 10;
- wherein each of the activators is present in an amount of from about 0.1 to 20% by weight of the composition; and
- B. At least one of the following accelerator constituents
- (i) Furfurylamine, optionally in combination with N-phenyl-diethanolamine;
- (ii) Tetrahydrofurfurylamine, optionally in combination with N-phenyl-diethanolamine;
- wherein each of the accelerators is present in an amount from about 0.1 to 20% by weight of the composition; said constituents A and B being present in an amount sufficient to activate the aqueous alkaline solution when added to the solution.
- 2. An activating composition according to claim 1 comprising at least one of a sequestering agent, a surfactant, a stabilizing agent and a coupling agent, wherein said sequestering agent is present in an amount of from about 0.1 to 20% by weight of the composition and said surfactant, stabilizing agents, and coupling agent are each present in an amount of from about 0.1 to 10% by weight of the composition.
- 3. An activating composition according to claim 1 wherein component A comprises 3 to 15% by weight, and component B comprises 2 to 15% by weight of the composition.
- 4. An activating composition according to claim 1 wherein in the component A
- R'O(CH.sub.2 CH.sub.2).sub.n H compound
- n is about 3 to 8.
- 5. An activating composition according to claim 1 wherein in the component A
- R'O(CH.sub.2 CH.sub.2 O).sub.n H compound
- n is about 0.5 to 1.5.
- 6. An activating composition according to claim 1 wherein Component A consists essentially of a mixture of
- R'O(CH.sub.2 CH.sub.2 O).sub.n H
- wherein R' is tetrahydrofurfuryl and n is about 3 to 8, and
- R"O(CH.sub.2 CH.sub.2 O).sub.n H
- wherein R" is furfuryl and n is about 0.5 to 1.5.
- 7. An activating composition according to claim 6 wherein Component B consists essentially of N-phenyl-diethanolamine in an amount of about 4 to 8% by weight.
- 8. An activating composition according to claim 6 wherein component A consists essentially of a mixture of compound
- R'O(CH.sub.2 CH.sub.2 O).sub.n H in an amount of about 3 to 10% by weight, and compound
- R"O(CH.sub.2 CH.sub.2 O).sub.n H in an amount of about 3 to 12% by weight.
- 9. An activating composition according to claim 1 wherein component A consists essentially of compound
- R'O(CH.sub.2 CH.sub.2 O).sub.n H in an amount of about 15% by weight.
- 10. An activating composition according to claim 2 wherein the sequestering agent comprises a hydroxycarboxylic acid.
- 11. An activating composition according to claim 2 wherein the stabilizing agent comprises tetraethylene glycol.
- 12. An activating composition according to claim 2 comprising a coupling agent which is the monobutyl ether of diethylene glycol in an amount of about 0.1 to 10% by weight.
- 13. An activating composition according to claim 1 wherein component A consists essentially of
- a mixture of
- R'O(CH.sub.2 CH.sub.2 O).sub.n H
- wherein R' is tetrahydrofurfuryl and
- n is about 3 to 8; and
- R"O(CH.sub.2 CH.sub.2 O).sub.n H
- wherein R" is furfuryl and
- n is about 0.5 to 1.5; and at least one of
- N-methyl-2-pyrrolidone and
- N-(2-hydroxyethyl)-2-pyrrolidone.
- 14. An activating composition according to claim 1 wherein component B consists essentially of at least one of
- Furfurylamine
- Tetrahydrofurfurylamine;
- each in an amount of about 2 to 15% by weight.
- 15. An activating composition according to claim 14 wherein component B consists essentially of at least one of
- Furfurylamine
- in an amount of about 4 to 8% by weight, and
- Tetrahydrofurfurylamine
- in an amount of about 4 to 8% by weight.
- 16. An activating composition according to claim 15 comprising at least one of a sequestering agent, a surfactant and a stabilizing agent wherein said sequestering agent is present in an amount of from about 0.1 to 20% by weight of the composition and said surfactant and stabilizing agents are each present in an amount of from about 0.1 to 10% by weight of the composition.
- 17. An activating composition according to claim 16 wherein the sequestering agent comprises a hydroxycarboxylic acid in an amount of about 2 to 10% by weight.
- 18. An activating composition according to claim 16 wherein the surfactant comprises sodium butoxyethoxy acetate in an amount of about 1 to 5% by weight.
- 19. An activating composition according to claim 16 wherein the stabilizing agent comprises at least one of thiodiethylene glycol in an amount of about 2 to 12% by weight and tetraethylene glycol in an amount of about 2 to 12% by weight.
- 20. An aqueous alkaline solution for removing a siccative coating from a substrate coated therewith at an elevated temperature comprising
- I about 2 to about 5 volumes of the composition of claim 1, and
- II about 10 volumes of an aqueous alkaline solution containing from about 10 to about 50% by weight of an alkali metal hydroxide.
- 21. An activating composition according to claim 20, wherein the alkali metal hydroxide is sodium hydroxide, potasium hydroxide or mixtures thereof and the concentration of the alkali metal hydroxide is about 45 to 50% by weight.
- 22. A method of removing a siccative coating from a substrate coated therewith comprising the steps of
- (1) contacting said coated substrate with an effective quantity of the composition of claim 6 at an elevated temperature until the siccative coating is removed from the coated substrate; and
- (2) removing the substrate from contact with the composition.
- 23. A method of removing a siccative coating from a substrate coated therewith comprising the steps of
- (1) contacting said coated substrate with an effective quantity of the composition of claim 13 at an elevated temperature until the siccative coating is removed from the coated substrate; and
- (2) removing the substrate from contact with the composition.
Parent Case Info
This application is a continuation-in-part of Applicants' copending application Ser. No. 553,337, filed Nov. 18, 1983, now abandoned, the disclosure of which is incorporated herein in its entirety by reference thereto.
US Referenced Citations (18)
Non-Patent Literature Citations (1)
Entry |
Miranol Amphoteric Imidazoline Derivatives; Technical and Product Development Data, 8th Edition, pp. 1, 3, 57. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
553337 |
Nov 1983 |
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