| 摘要 |
Easily removable protective coatings formed from aqueous dispersions or emulsions of synthetic copolymers that can form a salt and wherein these aqueous coating materials, in addition to water, contain the following constituents: (a) at least one copolymer which: (i) at a temperature of about 5 DEG C. and above will form a film, (ii) contains acid or amino groups wherein the copolymer is water-insoluble therewith, but wherein the copolymer becomes water-soluble when the acid or amino groups are in the form of a salt, and (iii) can exist in the form of an aqueous dispersion or emulsion. (b) at least one water-immiscible non-solvent which: (i) will not dissolve the copolymer in (a), (ii) has low volatility, and (iii) is liquid at room temperature; (c) at least one nonionic emulsifier with an HLB-value of less than 10; and (d) additional adjuvants and/or additives. The invention also relates to the application of these coating materials as temporary surface protectors, especially for metallic and/or painted surfaces, for storage in the open air with exposure to climatic and/or mechanical influences.
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