| http://www.w3.org/ns/prov#value | - H. Polyethylene oxide of molecular weight one million or more is preferred. [0013] High molecular weight water soluble vinyl polymers, such as those of the formula ???(CH2???CRR???)n ??? , where R and R??? may be any moiety which can confer water solubility and n is an integer sufficient to provide a molecular weight of one million or higher.
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