Stable wet strength resin

Details Stable wet strength resin Stable wet strength resin

2007-11-06

2007-11-06

Boykin, Terressa (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

C162S164600, C524S608000, C528S310000

Reexamination Certificate

active

10818269

ABSTRACT:
A method of stabilizing an aqueous solution of polyaminoamide-epichlorohydrin resin comprising adjusting the pH of the solution to less than about 3 with strong acid and then adding to the solution a weak acid in a mole ratio of total protons available from the weak acid to total protons available from the strong acid of about 0.05 to about 2.

REFERENCES:
patent: 3197472 (1965-07-01), Schmaiz
patent: 4853431 (1989-08-01), Miller
patent: 0320121 (1989-06-01), None
patent: 0320121 (1989-06-01), None

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