Global Patent Index - EP 3056296 A1

EP 3056296 A1 20160817 - FOUNDRY BINDER MIXTURE

Title (en)

FOUNDRY BINDER MIXTURE

Title (de)

BINDEMITTELGEMISCH FÜR FORMSAND

Title (fr)

MÉLANGE POUR LIANT POUR SABLE DE FONDERIE

Publication

EP 3056296 A1 20160817 (EN)

Application

EP 16154978 A 20160210

Priority

IT MI20150206 A 20150213

Abstract (en)

The present invention relates to synthetic resin-based systems, such as furan resins, to be used, in combination with suitable curing agents, as binders in mixtures with silica sand or other granular masses, for the production of foundry moulds and cores. In particular, one aim of the invention consists of the use of at least one alkyl ester of phosphorous acid and/or phosphoric acid and/or a salt thereof as an acidic catalyst for the manufacture of foundry binder mixtures, for example those of the 'no-bake' type. A further aim of the invention also consists of a mixture usable as a foundry binder, for example of the no-bake type, containing: a) monomeric furfuryl alcohol in quantities below 25% by weight of the mixture; b) formaldehyde in quantities no higher than 0.5% by weight of the mixture; c) at least one alkyl ester of phosphorous acid and/or phosphoric acid and/or a salt thereof.

IPC 8 full level

B22C 1/20 (2006.01); C08L 75/04 (2006.01)

CPC (source: EP)

B22C 1/20 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3056296 A1 20160817

DOCDB simple family (application)

EP 16154978 A 20160210