Process for the preparation of a polyvinyl alcohol complex compo

Details Process for the preparation of a polyvinyl alcohol complex compo Process for the preparation of a polyvinyl alcohol complex compo

1981-01-09

1982-05-25

Levin, Stanford M.

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

Synthetic resins

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

C08F 812

Patent

active

043317812

ABSTRACT:
With polybasic inorganic acids, for example boric acid, polyvinyl alcohol forms complex compounds, which, in the form of a gel, are suitable as adhesives. PVAL complex compounds are prepared in simple manner by subjecting to alcoholysis a polyvinyl ester in the presence of an organic boric acid derivative complexing agent. The reaction is carried out in alcoholic solution and the complexing agent should be soluble in alcohol. As starting material polyvinyl acetate is preferred, and methanol is preferred as alcohol. The PVAL complex compounds prepared in this way are used, inter alia, as binders and thickening agents for coating substances.

REFERENCES:
patent: 2607765 (1952-08-01), Czerwin et al.
patent: 3135648 (1964-06-01), Hawkins
patent: 3320200 (1967-05-01), Kane
patent: 3409598 (1968-11-01), Takigawa et al.
patent: 3488337 (1970-01-01), Jones
patent: 4098969 (1978-07-01), Zimmermann et al.

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