us patent for high solids glyoxalated polyacrylamide in britain

us patent for high solids glyoxalated polyacrylamide in britain
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  • What is glyoxalated polyacrylamide polymer?
  • In various embodiments, the glyoxalated polyacrylamide polymer can be the reaction product of glyoxal and a base polymer comprising the acrylamide monomer and the cationic monomer in a weight ratio, ranging, for example, from about 0.01 to about 0.6:1, and, for example, from about 0.10 to about 0.30:1.
  • Can glyoxalated polyacrylamide be used as a strengthening agent?
  • A method for making a storage-stable glyoxalated polyacrylamide composition suitable for use as a strengthening agent for paper in which the glyoxal is added to the base polyacrylamide polymer in two portions and a scavenger for aldehyde groups is used.
  • Is glyoxalated polyacrylamide a cationic monomer?
  • The exemplified glyoxalated polyacrylamide products in U.S. Pat. No. 4,605,702 have a concentration of about 20% by weight cationic monomer, but were indicated as being used in much higher dosages to compare wet strength properties with exemplified products in U.S. Pat. No. 3,556,932.
  • What is glyoxalated polyacrylamide (G-Pam)?
  • Glyoxalated polyacrylamide (G-PAM) is used in a variety of paper grades to provide paper with dry and temporary wet strength. For example, glyoxalated polyacrylamide increases the initial wet strength of many household tissues which come in contact with water in use.