Polyvinyl alcohol powder

Details Polyvinyl alcohol powder Polyvinyl alcohol powder

1997-05-30

1998-09-22

Michl, Paul R.

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

Synthetic resins

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

525 62, C08F11606

Patent

active

058114882

ABSTRACT:
The present invention provides a polyvinyl alcohol powder which comprises a pore having an average diameter of 0.1 to 10 .mu.m in the range of 0.05 to 0.4 cc/g.
Since the PVA powder of the present invention has an excellent solubility in water, an aqueous solution thereof can easily be prepared industrially.
Since the PVA powder of the present invention has a low content of an organic volatile component and a low content of a nonvolatile component such as a carboxylic acid salt or the like which is derived from a basic catalyst, it has an excellent industrial handleability.

REFERENCES:
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patent: 3296236 (1967-01-01), Tanner
patent: 3487060 (1969-12-01), Bristol
patent: 4104208 (1978-08-01), Kido
patent: 4314032 (1982-02-01), Murayama
patent: 4388442 (1983-06-01), Taniguchi
patent: 5256400 (1993-10-01), Froix
patent: 5397815 (1995-03-01), Carlin
patent: 5502082 (1996-03-01), Unger

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