摘要:
Broadly, the present invention relates to furan no-bake foundry binders where bisphenol A tar (BPAT) is used to replace a portion of the furfuryl alcohol and any conventional filler optionally included in for binder formulation. Reduction in the amount of furfuryl alcohol in the foundry binder formulation may lead to a reduction in the cost and an improvement in early strength of these formulations. Accordingly, in a furan no-bake foundry binder of a resin derived from a major proportion of furfuryl alcohol and optionally fillers, the improvement which comprises at least a fraction of said furfuryl alcohol being bisphenol A tar. Bisphenol A tar also can replace at least a fraction of any filler included in the binder formulation.
摘要:
Broadly, the invention provides for newly available bio-derived formaldehyde-free furanic materials for aggregate binding. A specific example is aggregate binding for forms used in the metal casting process. The inventive binder formulations involve the use of 2,5-furan dimethanol and other “filler” components for high productivity and fast tensile development without formaldehyde, urea, urea-formaldehyde or formaldehyde containing compositions.
摘要:
Broadly, the invention provides for newly available bio-derived formaldehyde free furanic materials for aggregate binding. The specific example case is aggregate binding for forms used in the metal casting process. The new materials make possible higher productivity and lower phenol, formaldehyde, urea, and/or furfuryl alcohol content in the metal casting form-making process. It is expected that the formulations will work well in other aggregate binding situations as well.
摘要:
Broadly, the invention provides for a cold-box aggregate binder typically being a mixture of phenolic or urea resin and a furanic material selected from one or more of the group consisting of 5-hydroxymethyl furfural (HMF); 2,5-furan dimethylol (FDM); 2,5-furan dicarboxylic acid (FDCA); 2,5-diformyl furan (DFF); FDCA monoalkyl ester (hemiester); FDM-ether; and HMF-ether; that cures in the presence of a catalyst gas.
摘要:
Broadly, the invention provides for newly available essentially formaldehyde-free furanic materials for lower-staining, higher reactivity, chemically resistant grout formulations.
摘要:
Broadly, the invention provides for apparatus to form and gas-cure composite and or aggregate materials while controlling the flow of compound at a desired concentration and pressure.
摘要:
The invention relates to an ester cured no-bake foundry binder system preferably comprising as separate components (a) an aqueous basic solution of a phenolic resole resin; (b) a hardener comprising (i) an epoxy resin, and (ii) a liquid ester.
摘要:
A method for conducting the game of football is disclosed. In this method, each player is given a designation consisting of a combination of a single letter and certain selected numbers worn on his uniform that directly identifies the player and his assigned position.
摘要:
An adhesive paste composition containing in admixture a resin component, a hardener component, a hydrophobic filler component and a curing agent. The resin component includes a polyol having at least two hydroxyl groups and the hardener component includes a liquid polyisocyanate containing at least two isocyanate groups. The admixture may be made by mixing together a premixed resin component contianing a filler and a catalyst and a premixed hardener component containing a hydrophobic filler. The fluid in the resin component, the hardener component, or both may be a thixotropic agent.
摘要:
An adhesive paste composition containing in admixture a resin component, a hardener component, a hydrophobic filler component and a curing agent. The resin component includes a polyol having at least two hydroxyl groups and the hardener component includes a liquid polyisocyanate containing at least two isocyanate groups. The admixture may be made by mixing together a premixed resin component containing a filler and a catalyst and a premixed hardener component containing a hydrophobic filler. The filler in the resin component, the hardener component, or both may be a thixotropic agent.