Polyvinyl alcohol polymer and method for producing the same
AssigneeKuraray Co., Ltd.
InventorsMasaki Kato, Masato Nakamae, Yuta Taoka
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Abstract
The present invention provides a polyvinyl alcohol polymer having excellent water solubility, compared to conventional polyvinyl alcohol polymers, and having a high cloud point even when the polyvinyl alcohol polymer is partially saponified. The present invention is a polyvinyl alcohol polymer having, at its end, a group represented by the general formula (I) and/or having, in its main chain, a group represented by the general formula (II). In the formulae, R denotes a hydrogen atom or an OM group, and M denotes a hydrogen atom, an alkali metal atom, a 1/2 alkaline earth metal atom, or an ammonium group.
Claims12
A polyvinyl alcohol polymer, comprising:
- (i) at its end, a group represented by formula (I):
- (ii) in its main chain, a group represented by formula (II):
- (iii) the group of formula (I) and the group of formula (II),
- wherein
- R represents a hydrogen atom or an OM group;
- and
- M represents a hydrogen atom, an alkali metal atom, a 1/2 alkaline earth metal atom, or an ammonium group.
Dependencies are inferred from the claim text.