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US 7,351,302 B2Granted
Method for binding particulate, water-absorbing, acid group-containing polymers to a base material
AssigneeBASF SE
InventorsRüdiger Funk, Ulrike Hoss
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AssigneeBASF SE
InventorsRüdiger Funk, Ulrike Hoss
Estimating the term…
A process for binding particulate water-absorbing acid-functional polymers to a carrier material by means of compounds comprising amino groups, which comprises contacting the carrier material with particulate water-absorbing acid-functional polymers whose acid groups have been 0 to not more than 55 mol % neutralized with alkali metal and/or ammonium bases and then raising the degree of neutralization of these polymers to not less than 60 mol % by treatment with amino-containing compounds. The use of compounds comprising amino groups and selected from the group of the compounds consisting of the alkanolamines and compounds which contain ethyleneimine and/or vinylamine units to neutralize and bind particulate water-absorbing acid-functional polymers neutralized 0 to not more than 55 mol % with alkali metal and/or ammonium bases to a carrier material.
A process for binding a particulate water-absorbing acid-functional polymer to a carrier material by means of a compound comprising amino groups, which comprises contacting the carrier material with a particulate water-absorbing acid-functional polymer whose acid groups are 15 to 55 mol % neutralized with an alkali metal and/or ammonium base and then applying the amino-containing compound to raise the degree of neutralization of the polymer to not less than 60 mol % by treatment, wherein the amino-containing compound is a compound containing vinylamine units.
Dependencies are inferred from the claim text.