Amphoteric latexes containing pH independent and pH dependent bo

Details Amphoteric latexes containing pH independent and pH dependent bo Amphoteric latexes containing pH independent and pH dependent bo

1985-06-11

1986-04-15

Schofer, Joseph L.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Bulk deposition of particles by differential fluid pressure

162156, B27N 100

Patent

active

045826633

ABSTRACT:
A selectively stable latex has discrete polymer particles which have present as bound charges both a pH independent charge (such as sulfonium) and a pH dependent charge of opposite polarity of the pH independent charge (such as carboxyl), wherein the two charges are present in such proportion that the latex is stable in at least one pH range and controllably unstable in at least one pH range. The latexes of the invention are extremely useful in the preparation of fibrous composites such as highly-filled composite paper and fine printing paper.

REFERENCES:
patent: 3424706 (1969-01-01), Smith et al.
patent: 3580880 (1971-05-01), Clarke et al.
patent: 3637565 (1972-01-01), Sheetz
patent: 3759861 (1973-09-01), Shimokawa
patent: 3760035 (1973-09-01), Kelley
patent: 4225383 (1980-09-01), McReynolds
patent: 4265977 (1981-05-01), Kawamura et al.
patent: 4325856 (1982-04-01), Ishikawa et al.
patent: 4337185 (1982-06-01), Wessling et al.

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