Title: Process for producing furan-epoxy powder-like binder

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Abstract: A process for producing a furan-epoxy powder-like binder comprising reaction of an epoxy diane resin (100 parts by weight) with a ketone of the furan series (40 to 500 parts by weight) and a modifying agent (60 to 500 parts by weight). As the ketone of the furan series use is made of monofurfurylideneacetone, difurfurylideneacetone, difurfurylidenecyclohexanone, a mixture of monofurfurylidenacetone with difurfurylidenacetone, 1,9-di-(.alpha.-furyl)-nonanetetraene-1,3,6,8-one-5, or 1,5-di-(.alpha.-furyl)-2,4-dimethylpentadiene-1,4-one-3. As the modifying agent use is made of a phenolformaldehyde resin or anhydrides of dibasic carboxylic acids. The reaction is carried out at a temperature within the range of from 130.degree. to 180.degree. C. in the presence, when required, of trifurylborate (10 to 30 parts by weight). The resulting product is cooled to a temperature of at most 30.degree. C. and disintegrated to a powder-like condition. The furan-epoxy binder according to the present invention is not clogging for 60 days; it is also capable of being stored for long periods, up to 12 months, without losing its initial properties. Strain heat-resistance of polymeric materials based on this binder is as high as 320.degree. C. according to Vicat. Polymeric materials based on the binder of this invention can be both inflammable and non-inflammable or can have self-extinguishing properties.


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