US 4,053,519 AGranted

1,1,3,3-Tetrakis(perfluoroalkylsulfonyl)propanes

AssigneeMinnesota Mining and Manufacturing Company

InventorsRobert J. Koshar, Loren L. Barber, Jr.

Life of this patent

Estimating the term…

Abstract

1,1-Bis(perfluoroalkylsulfonyl)propanes substituted in the three position by two to three electron-withdrawing groups, particularly perfluoroalkylsulfonyl, carboxyl, carboalkoxy or cyano are catalysts for the polymerization of aromatic epoxy resins.

Claims3

Dependent claims

A substituted 1,1,3,3-tetrakis(perfluoroalkylsulfonyl)propane represented by the structure ##STR15## wherein R.sub.f, R'.sub.f and R".sub.f are perfluoroalkyl groups of 1-18 carbon atoms.

Dependencies are inferred from the claim text.

Facts

Application: 05/704,383Filed 12 Jul 1976 · division
Priority: 7 Mar 1975
Granted: 11 Oct 1977
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

C07D 209/48
Iso-indoles; Hydrogenated iso-indoles: with oxygen atoms in positions 1 and 3, e.g. phthalimide
C07C 317/04
Having sulfone or sulfoxide groups bound to acyclic carbon atoms: of an acyclic saturated carbon skeleton
C07C 317/44
Sulfones; Sulfoxides: having sulfone or sulfoxide groups and carboxyl groups bound to the same carbon skeleton
C08G 59/4064
Curing agents not provided for by the groups C08G59/42 - C08G59/66: sulfur containing compounds

Family

Serial556,494Parent of this division · filed 7 Mar 1975
US 4,053,519 AThis patent

From the US filing history. Foreign family members aren’t listed.

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