Patents Assigned to PaperChem Inc. Betz
  • Process and composition for deinking dry toner electrostatic printed wastepaper
    Patent number: 5302242
    Abstract: A process and composition for deinking dry toner electrostatic printed wastepaper is disclosed. The composition comprises a combination of at least two of the following components: (a) aliphatic petroleum distillates, (b) an alkylphenoxypoly-(ethyleneoxy) ethanol and (c) an ethoxylated polyoxypropylene glycol.The process comprises administering a sufficient amount of the composition to a sample of electrostatic printed wastepaper for which treatment is desired.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: April 12, 1994
    Assignee: PaperChem Inc. Betz
    Inventors: Sandra K. Richmann, Mary Beth Letscher