Polysilicate microgels as retention/drainage aids in papermaking

  • US 4,954,220 A
  • Filed: 08/07/1989
  • Issued: 09/04/1990
  • Est. Priority Date: 09/16/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for improving retention and drainage in a papermaking process of the type wherein aqueous paper furnish containing pulp is formed and dried which comprises adding to the pulp a water soluble polysilicate microgel formed by partial gelation of an alkali metal silicate in combination with at least about 0.001 wt percent, based on the dry weight of the paper furnish, of a water soluble cationic polymer.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×