Acylation of polyvinyl alcohols, and photopolymerizable and/or p

Details Acylation of polyvinyl alcohols, and photopolymerizable and/or p Acylation of polyvinyl alcohols, and photopolymerizable and/or p

1984-06-25

1985-09-10

Anderson, Harold D.

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

Synthetic resins

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

20415915, 525 59, C08F 810

Patent

active

045407436

ABSTRACT:
The acylation of polyvinyl alcohols is carried out by a process in which these alcohols are esterified with an activated carboxylic acid derivative in the presence of, as the catalyst, an aminopyridine derivative of the general formula (I) ##STR1## where R.sup.1 and R.sup.2 are each alkyl, or R.sup.1 and R.sup.2 together form an alkylene radical. The acylation is particularly advantageously carried out in the heterogeneous phase. The acylated polyvinyl alcohols prepared in this manner are used in photopolymerizable and/or photocrosslinkable mixtures.

REFERENCES:
patent: 2759909 (1956-08-01), Hiatt et al.
patent: 3220960 (1965-11-01), Wichterle et al.
patent: 3427161 (1969-02-01), Laridon et al.
patent: 3560465 (1971-02-01), Reynolds
patent: 4140853 (1979-02-01), Vorbrueggen
Houben-Weyl, "Methoden der Organischen Chemie", 4.Auflage, Band XIV/2, S. 725-728, 1963, Herlinger et al.
G. Hofle, W. Steglich, H. Vorbruggen, "Angewandte Chemie 90", 1978, S. 602-615.

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