Vinyl alcohol polymer and process for producing vinyl...

Details Vinyl alcohol polymer and process for producing vinyl... Vinyl alcohol polymer and process for producing vinyl...

2005-11-08

2005-11-08

Lipman, Bernard (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S060000, C525S061000, C525S062000

Reexamination Certificate

active

06962955

ABSTRACT:
A polyvinyl alcohol having hydrolyzed silyl group functionalized monomer units. The polyvinyl alcohol satisfies the following formulae (I) and (II) and the pH of an aqueous 4% solution of the polyvinyl alcohol is between 4 and 8:in-line-formulae description="In-line Formulae" end="lead"?20<P×S<370  (I)in-line-formulae description="In-line Formulae" end="tail"?wherein P is the viscosity-average degree of polymerization of the polyvinyl alcohol, and S is the content of the silyl group functionalized monomer units in the polyvinyl alcohol,in-line-formulae description="In-line Formulae" end="lead"?0.1/100≦(A−B)/(B)≦50/100  (II)in-line-formulae description="In-line Formulae" end="tail"?wherein A is the silicon atom content of the polyvinyl alcohol, B is the silicon atom content of the polyvinyl alcohol that has been washed with sodium hydroxide-containing methanol and then washed through Soxhlet extraction with methanol. The polyvinyl alcohol may be readily dissolved in water in the absence of sodium hydroxide or an acid; the aqueous solution has good viscosity stability; the binding force with inorganic substances is high; and a film formed of its mixture with an inorganic substance is excellent in resistance to water. The polyvinyl alcohol is favorable for coating agents for inkjet recording materials and thermal recording materials.

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