Poly-vinylphosphonic acid and metal oxide or cermet or glass ion

Details Poly-vinylphosphonic acid and metal oxide or cermet or glass ion Poly-vinylphosphonic acid and metal oxide or cermet or glass ion

1989-04-27

1992-01-07

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 2, 524 5, 524123, 524124, 524414, C08K 300, C08K 553, A61K 608

Patent

active

050792776

ABSTRACT:
A glass ionomer cement composition comprises poly(vinyl phosphonic acid) dissolved in its own mass of water; and (in treble the total mass of the solution) a powder, being glass or MgO or a cermet. The powder has to be deactivated so that the setting reaction with the acid is not too fast, and this is achieved either by a raised Si:Al ratio or by heat-treating.

REFERENCES:
patent: 4758612 (1988-06-01), Wilson et al.
Patent Abstracts of Japan vol. 8 #11(c-250)[1448]1/18/84.
Patent Abstracts of Japan vol. 8 #241 (C-250)[1678] 11/6/1984.
Patent Abstracts of Japan vol. 8 #241 (C-250)[1678] 11/6/1984.

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