Method for the production of water-absorbing polymer...

Details Method for the production of water-absorbing polymer... Method for the production of water-absorbing polymer...

2008-08-25

2011-10-25

Wu, David W (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S235000

Reexamination Certificate

active

08044158

ABSTRACT:
A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase, wherein the monomer solution comprises at least 0.0002% by weight of oxygen and the oxygen content of the gas phase is at least 0.5% by volume.

REFERENCES:
patent: 7727586 (2010-06-01), Bruhns et al.
patent: 2010/0010176 (2010-01-01), Losch et al.
patent: 2010/0016505 (2010-01-01), Losch et al.
patent: 2010/0029866 (2010-02-01), Losch et al.
patent: 2010/0035059 (2010-02-01), Losch et al.
patent: 2010/0062932 (2010-03-01), Losch et al.

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