Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1984-07-13
1985-05-21
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 68, C08G 1838
Patent
active
045187606
ABSTRACT:
A novel process is provided for producing a poly(dithiocarbamate) resin chelating agent which comprises dissolving a polyimine in an alcohol solvent to form a polyimine solution. A polyisocyanate is admixed in the polyimine solution to produce a cross-linked polyamine-polyurea precursor resin. The cross-linked polyamine-polyurea precursor resin is then reacted with a mixture of NH.sub.4 OH and CS.sub.2 to produce a poly(dithiocarbamate) resin chelating agent.
The novel process can employ a polyimine in anhydrous or aqueous suspension form and uses non-hazardous solvents for the polyisocyanate reactant.
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Cochran Harvey B.
Smith Maurice R.
Clements Donald F.
Haglind James B.
Olin Corporation
Welsh Maurice J.
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