Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Reexamination Certificate
2005-05-10
2011-11-01
Daniels, Matthew (Department: 1741)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
C162S005000, C162S078000, C210S696000, C210S700000, C252S180000, C525S205000
Reexamination Certificate
active
08048264
ABSTRACT:
The present invention relates to a stabilizing composition comprising following components (A) a polymer having following formulawherein R1is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2is —COOM or —CH2COOM, M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof, n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol, (B) a chelating agent, and (C) an alkaline earth metal compound. The invention also relates to a process for the treatment of a fiber material.
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Ahlgren Jonni
Jäkärä Jukka
Paren Aarto
Rautiainen Jukka
Renvall Ilkka
Daniels Matthew
Kemira Oyj
Minskey Jacob Thomas
Thomas Kayden Horstemeyer & Risley LLP
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