| http://www.w3.org/ns/prov#value | - These binders should preferably be resins containing a hydrophilic polar group such as --SO3 M, --COOM OR --PO(OM')2, wherein M is hydrogen or an alkali metal such as lithium, potassium or sodium; and M' is an alkali metal such as lithium, potassium or sodium, or a hydrocarbon residual group.
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