| http://www.w3.org/ns/prov#value | - A molding of claim 3, wherein the substantially aqueous solution of the water-soluble prepolymer comprising crosslinkable groups is free or substantially free from undesired constituents, such as especially monomeric, oligomeric or polymeric starting compounds used for the preparation of the prepolymer, or secondary products that have formed during the preparation of the prepolymer.
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