FIELD: casting manufacture. SUBSTANCE: carbamidofuran binder is synthesized by two-stage condensation of carbamide, formaldehyde and furfuryl alcohol. At the first stage condensation of carbamide and formaldehyde is carried out firstly in alkaline and then in acid medium; at the second stage of condensation tetrahydrofuran is added together with furfuryl alcohol at concentration 1.5-3.0 wt.-% of furfuryl alcohol level. EFFECT: decreased hygroscopicity of rods and forms, prevention of their weakening at increased relative air humidity. 2 tbl
Title | Year | Author | Number |
---|---|---|---|
METHOD OF SYNTHESIS OF CARBAMIDOFURAN BINDER FOR MAKING CASTING RODS BY HEATING EQUIPMENT | 1993 |
|
RU2048951C1 |
CARBAMIDOPHENOLFURAN-BASED BINDER FOR MANUFACTURING CASTING CORES IN HEATED EQUIPMENT | 1992 |
|
RU2044590C1 |
METHOD FOR PREPARING CARBAMIDE-PHENOL-FORMALDEHYDE-FURAN BINDING AGENT FOR CASTING SHELL FORMS AND RODS | 2005 |
|
RU2292982C1 |
BLEND FOR MANUFACTURING CORES AND MOLDS IN HEATED EQUIPMENT | 1994 |
|
RU2073583C1 |
METHOD OF PREPARING PHENOL-UREA-FURAN BINDER | 2004 |
|
RU2268897C1 |
SYNTHETIC RESIN-BASED BINDER HARDENED BY ACID CATALYSTS AND USED FOR MANUFACTURING OF CORES AND CASTING MOLDS IN COLD EQUIPMENT | 1992 |
|
RU2044589C1 |
COLD-SETTING COMPOSITION FOR MAKING MOULDS AND CORES | 0 |
|
SU1321510A1 |
BINDER FOR PRODUCING CASTING MOULDS AND CORES HARDENED IN COLD EQUIPMENT | 0 |
|
SU959889A1 |
ACID COMPLEX HARDENING AGENT FOR CORE MIXTURE WITH POLYCONDENSATION RESIN BINDER OF HOT HARDENING | 1993 |
|
RU2048949C1 |
MIXTURE FOR MANUFACTURE OF CASTING CORES AND MOLDS IN HEATED RIGS | 1995 |
|
RU2087244C1 |
Authors
Dates
1995-11-27—Published
1993-08-30—Filed