Quaternized teriary aminomethyl acrylamide polymer microemulsion

Details Quaternized teriary aminomethyl acrylamide polymer microemulsion Quaternized teriary aminomethyl acrylamide polymer microemulsion

1997-05-01

1999-01-26

Merriam, Andrew E. C.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524555, 524284, 524300, 524922, 528486, 210734, C08L 3326, C08K 324

Patent

active

058639829

ABSTRACT:
Quaternized tertiary aminomethyl acrylamide polymer emulsions are treated by 1) adjusting the pH to about 3.6 to about 4.8, 2) adding a formaldehyde scavenger, 3) adjusting the water content of the aqueous phase to result in about 10-45 weight percent of quaternized aminomethylated acrylamide polymer and 4) heating the resultant emulsion at from about 40.degree. C. to about 80.degree. C. for about 3 to about 20 hours so as to render them more stable, capable of inversion in water independent of water temperature or pH of the medium flocculent and superior dewatering ability.

REFERENCES:
patent: 3988277 (1976-10-01), Witschonke et al.
patent: 4073763 (1978-02-01), Tai
patent: 4120840 (1978-10-01), Hurlock et al.
patent: 4816508 (1989-03-01), Chen

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