Thermostable metaformaldehyde containing condensate of melamine and formaldehyde, and its preparation method
The invention discloses a thermostable metaformaldehyde containing condensate of melamine and formaldehyde, and its preparation method, which consists of charging melamine and methyl aldehyde into a bottle with a stirrer, a temperature gage and a reflux condenser, charging composite disperser soluti...
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Main Author | |
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Format | Patent |
Language | English |
Published |
14.02.2007
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Subjects | |
Online Access | Get full text |
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Summary: | The invention discloses a thermostable metaformaldehyde containing condensate of melamine and formaldehyde, and its preparation method, which consists of charging melamine and methyl aldehyde into a bottle with a stirrer, a temperature gage and a reflux condenser, charging composite disperser solution 5-15 weight parts at 60-75 deg C, adjusting pH to 6.3-6.5, elevating temperature to 80-95 deg C, reacting 0.5-1.5 hrs, adjusting pH to 6.8-7.2, stopping the reaction, washing and filtering the reactant, thus obtaining MF condensate and storing at low temperature, then charging polyoxymethylene resin 100 weight parts, melamine methylene oxide condensate 0.07-1.8 weight parts, anti-oxidizing agent 0.1-0.5 part, formic acid absorbent 0.05-0.5 weight part, lubricating agent 0.1-0.5 weight part into a high speed mixing machine, melting with exhaustion type double screw bolt extrusion machine for squeezing and granulating. |
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Bibliography: | Application Number: CN200510021409 |