发明名称 |
Process for the preparation of partially etherified methylolmelamines |
摘要 |
Process for the preparation of monomeric methylolmelamine which is partially etherified with methanol or ethanol and which contains at least 4 moles of formaldehyde per mole of melamine, by reacting melamine, paraformaldehyde and methanol or ethanol in a single stage reaction, the molar ratio of melamine to formaldehyde to alcohol being 1:5 to 10:6 to 20, in a virtually anhydrous medium, under a nitrogen atmosphere, at a pH of 7 to 8 and a temperature from 50 DEG to 90 DEG C. and with a reaction time of from 3 to 30 hours.
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申请公布号 |
US4408045(A) |
申请公布日期 |
1983.10.04 |
申请号 |
US19820361308 |
申请日期 |
1982.03.23 |
申请人 |
CHEMIE LINZ AKTIENGESELLSCHAFT |
发明人 |
DOBRAMYSL, WILHELM;STERN, GERHARD;RAML, WALTER |
分类号 |
C07D251/64;(IPC1-7):C07D251/70 |
主分类号 |
C07D251/64 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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