Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymer of an ethylenically unsaturated reactant with a...
Patent
1988-03-07
1990-02-06
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymer of an ethylenically unsaturated reactant with a...
568591, 568598, C08G 1830
Patent
active
048989282
ABSTRACT:
Water-soluble polyacetal or polyketal having the formula ##STR1## wherein R.sub.1, and R.sub.2 are aliphatic, cycloaliphatic or aromatic groups, for ketals; R.sub.1 is hydrogen and R.sub.2 is aliphatic, cycloaliphatic, or aromatic groups for acetals; R.sub.3 and R.sub.4 are also aliphatic, alkoxy, cycloaliphatic or aromatic groups X represents groups as (CH.sub.2).sub.n, O(CH.sub.2).sub.N O or ##STR2## that connect the pendant unsaturation to the aliphatic, cycloaliphatic or aromatic R.sup.4 groups, the ratio of a to b is 0.5 to 10, and n is 10-100.
REFERENCES:
patent: 4713441 (1987-12-01), Heller et al.
Heller Jorge
Ng Steve Y.
Penhale Donald W. H.
Honor Robert S.
Jewell Walter F.
Sandoz Pharmaceuticals Corp.
Sharkin Gerald D.
Welsh Maurice J.
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