Method for removing polymer films in the manufacture of aqueous compositions containing acrylates copolymer
View Patent ↗This invention relates to a method to facilitate the removal of adherent polymeric films from a hard surface occasioned by the evaporation of solvent from compositions containing an anionic acrylates copolymer, the method comprising incorporating a phosphate ester surfactant into the compositions, and washing the film from the surface to which it adheres.
1. A method of cleaning a surface on to which a polymeric film of acrylates copolymer has formed upon evaporation of solvent from an aqueous composition containing said polymer, the method comprising:
(a) incorporating in said aqueous composition during its preparation from about 0.5% to about 5% by weight of said aqueous composition of a phosphate ester surfactant, and
(b) washing the surface with a cleaning composition to substantially remove said polymeric film.
2. The method of claim 1 in which the surface is selected from the group consisting of glass and metal.
3. The method of claim 2 wherein the surface is metal.
4. The method of claim 3 wherein the surface is steel.
5. The method of claim 4 wherein the surface is stainless steel.
6. The method of claim 5 in which the composition comprises hydrogen peroxide and has an acidic pH.
7. A method of cleaning a stainless steel surface used in the manufacture, transfer and storage of an aqueous acidic composition containing acrylates copolymer and an oxidizing agent and to which surface said polymer has formed an adherent film, the method comprising
(a) incorporating in said aqueous acidic composition during its preparation from about 0.5% to about 5% by weight of said aqueous acidic composition of a phosphate ester surfactant of the formula I
wherein R, R 1 and R 2 are each independently selected from the group consisting of hydrogen, an alkyl of from 1 to about 22 carbons, and an alkoxylated alkyl of from 1 to about 22 carbons and having from about 1 to about 25 moles ethylene oxide, with the proviso that at least one of R, R 1 and R 2 is an alkyl or alkoxylated alkyl as previously defined but having at least 6 alkyl carbons in said alkyl or alkoxylated alkyl group, and
(b) washing the stainless steel surface with a cleaning composition to substantially remove said film.
8. The method of claim 7 wherein the oxidizing agent is hydrogen peroxide.
9. The method of claim 7 wherein the cleaning composition is an alkaline solution having a pH of from about 8 to about 10.
10. The method of claim 9 wherein the cleaning composition is applied under moderate pressure of from about 20 to about 40 psig.
11. A developer composition comprising on a weight basis by weight of the composition:
(a) from about 6% to about 15% of a hydrogen peroxide oxidizing agent;
(b) from about 0.5% to about 5% of a phosphate ester surfactant,
(c) from about 0.1% to about 10% of acrylates copolymer; and
(d) water,
wherein said developer composition has an acidic pH.
12. The composition of claim 11 wherein the pH is from about 2.5 to about 6.5.
13. The composition of claim 11 further comprising an organic cosolvent selected from the group consisting of C 2 to C 6 mono- and polyhydric alcohols.
14. The composition of claim 11 wherein the phosphate ester surfactant is selected from the group consisting of C12-16 Pareth-6 Phosphate, C8-10 Alkyl Ethyl Phosphate, C9-15 Alkyl Phosphate, Ceteareth-2 Phosphate, Ceteareth-4 Phosphate, Ceteareth-5 Phosphate, Ceteareth-10 Phosphate, Ceteth-8 Phosphate, Ceteth-10 Phosphate, Cetyl Phosphate, C6-10 Pareth-4 Phosphate, C12-13 Pareth-10 Phosphate, C12-15 Pareth-2 Phosphate, C12-15 Pareth-3 Phosphate, C12-15 Pareth-6 Phosphate, C12-15 Pareth-8 Phosphate, C12-15 Pareth-10 Phosphate, C12-16 Pareth-6 Phosphate, DEA-Ceteareth-2 Phosphate, DEA-Cetyl Phosphate, DEA-Oleth-3 Phosphate, DEA-Oleth-5 Phosphate, DEA-Oleth-10 Phosphate, DEA-Oleth-20 Phosphate, Deceth-9 Phosphate, Deceth-4 Phosphate and Deceth-6 Phosphate.