Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1992-11-17
1997-01-07
Sellers, Robert E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
525524, 525525, 525527, 528103, 204489, 204502, C08G 5914, C08L 6302
Patent
active
055917887
ABSTRACT:
An advanced epoxy cationic resin useful as a cathodic electrodeposition coating is prepared by reacting in the presence of a suitable catalyst (A) a composition comprising (1) at least one diglycidyl ether of (a) an oxyalkylated aromatic diol or (b) an oxyalkylated cycloaliphatic diol or (c) certain oxyalkylated aliphatic diols and (2) at least one diglycidyl ether of a dihydric phenol with (B) at least one dihydric phenol and optionally (C) a monofunctional capping agent. Components (A-1) and (A-2) are employed in quantities such that from 10 to 75 weight percent of the diglycidyl ethers contained in component (A) are contributed by component (A-1), and from 25 to 90 weight percent of such glycidyl ethers are contributed by component (A-2). The terminal oxirane groups in the thus formed advanced epoxy resin are converted to cationic groups by reacting the resin with a nucleophilic compound and adding an organic acid and water at at least one point in the reaction.
REFERENCES:
patent: 4737553 (1988-04-01), Gannon et al.
patent: 4845172 (1989-07-01), Brytus et al.
patent: 4857567 (1989-08-01), Laugal et al.
patent: 4883830 (1989-11-01), Kitatabake et al.
Chem. Abs. 112:8764d (1990).
Copending application Ser. No. 07/464,501 filed Jan. 12, 1990 by Richard A. Hickner titled "Cationic, Advanced Epoxy Resin Compositions Incorporating Glycidyl Ethers of Oxyalkylated Aromatic or Cycloaliphatic Diols".
Anderson Kenneth W.
Hickner Richard A.
Sellers Robert E.
The Dow Chemical Company
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