Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Reexamination Certificate
2008-01-31
2011-11-29
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, C525S206000
Reexamination Certificate
active
08066846
ABSTRACT:
The invention relates to a stabilizing composition comprising following components(A) a polymer having the following formula:whereinR1is 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, andthe weight average molecular weight is between 500 and 20,000,000 g/mol,(B) a chelating agent,(C) a poly-alpha-hydroxyacrylic acid or an alkaline salt thereof or the corresponding polylactone thereof, and(D) optionally a polycarboxylic acid polymer or an alkaline salt thereof.The invention also relates to a process for the treatment of a fiber material.
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Aksela Reijo
Hämäläinen Hannu
Ilomäki Anna
Jäkärä Jukka
Paren Aarto
Daniels Matthew
Kemira Oyj
Minskey Jacob Thomas
Thomas Kayden Horstemeyer & Risley LLP
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