US 2015/0175740 A1 · PROCESSING-FRIENDLY DIANHYDRIDE HARDENER FOR EPOXY RESIN SYSTEMS BASED ON 5,5'-CARBONYLBIS(ISOBENZOFURAN-1,3-DIONE)

Abstract

The present invention provides a composition comprising 5,5′-carbonylbis(isobenzofuran-1,3-dione), 3,3′,4,4′-benzophenonetetracarboxylic acid and at least one monoanhydride compound selected from the group consisting of methylhexahydroisobenzofuran-1,3-dione, 5-methyl-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1,3-dione, 5-methyl-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione, 3-methylfuran-2,5-dione, 3,3,4,4,5,5-hexafluorodihydro-2H-pyran-2,6(3H)-dione and 3,3-dimethyldihydrofuran-2,5-dione. The invention also provides a hardener system for an epoxy resin, said hardener system comprising said composition. The invention also provides a method for hardening an epoxy resin employing the inventive composition.

Claims16

Dependent claims

A composition comprising:

5,5′-carbonylbis(isobenzofuran-1,3-dione);
3,3′,4,4′-benzophenonetetracarboxylic acid;
and
a monoanhydride compound selected from the group consisting of methylhexahydroisobenzofuran-1,3-dione, 5-methyl-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1,3-dione, 5-methyl-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione, 3-methylfuran-2,5-dione, 3,3,4,4,5,5-hexafluorodihydro-2H-pyran-2,6(3H)-dione and 3,3-dimethyldihydrofuran-2,5-dione.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/575,397Filed 18 Dec 2014

Priority

DE 102013226601.419 Dec 2013

Published

25 Jun 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

C08G 59/4284
Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof: together with other curing agents
C08G 59/4007
Characterised by the curing agents used: curing agents not provided for by the groups C08G59/42 - C08G59/66
C08G 59/4223
Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof: aromatic
C08G
Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds

Processing-friendly dianhydride hardener for epoxy resin systems based on 5,5'-carbonylbis(isobenzofuran-1,3-dione)

Life of this patent

Processing-friendly dianhydride hardener for epoxy resin systems based on 5,5'-carbonylbis(isobenzofuran-1,3-dione)

Life of this patent

Abstract

Claims16