Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Patent
1983-07-18
1986-01-28
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
528137, 528254, 528265, 528266, 521 39, C08G
Patent
active
045672075
ABSTRACT:
A polymeric material comprising a solid dispersion of a porous three-dimensional polymer with a pore diameter of 0.002 to 10 .mu.m and a permeability coefficient of from 2.times.10.sup.-7 to 2.times.10.sup.31 2 cm.multidot.sec.sup.-1. This material is produced by reacting formaldehyde with at least one monomer capable of forming, with formaldehyde, a polymer of a three-dimensional structure. The reaction is carried out in the presence of a polymerization catalyst in an aqueous medium at a pH of from 0.1 to 4, while maintaining the polymer concentration within the range of from 20 to 65% by mass. Thereafter the solution with the polymer is maintained for a period sufficient to form a porous polymer in the form a solid dispersion.
REFERENCES:
patent: 2460516 (1949-02-01), Fuoces
patent: 2809178 (1957-10-01), Turner et al.
Chem. Abstracts, vol. 91, Entry 124326, Khose et al.
Chem. Abstracts, vol. 92, Entry 23252, Khose et al.
Chemical Abstracts, vol. 101, Entry 91975q.
Imangazieva Gulsara K.
Kim Zinaida I.
Ljubman Nazar Y.
Nugmanova Lyalya T.
Sydykova Tokhtobubu C.
Kulkosky Peter F.
Michl Paul R.
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