Printing screen cleaning and reclaiming compositions

Details Printing screen cleaning and reclaiming compositions Printing screen cleaning and reclaiming compositions

1985-12-11

1987-05-12

Metz, Andrew H.

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 29, 134 38, 134 40, 252542, 252364, 252153, 252170, 252171, 101424, B08B 3000, B08B 700, C11D 118

Patent

active

046647210

ABSTRACT:
Ink cleaning compositions are disclosed which degrade or solubilize broad classes of printing ink residues on printing screens for quick removal by a pressurized water stream. The compositions are essentially non-aqueous and contain N-methyl-2-pyrrolidone (NMP), an oxygenated solvent, such as butyl cellosolve and cyclohexanone, and a surfactant. Alternatingly, compositions containing NMP and tetrahydrofurfuryl alcohol as the primary components are disclosed. Methods of cleaning and reclaiming printing screens which provide synergistic activities are also disclosed. The compositions meet health and safety standards due to their biodegradability, lack of flammability and high threshold limit values.

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