发明名称 |
A method for preparing low free formaldehyde methylol-hydantoins and compositions thereof |
摘要 |
<p>Compositions of dimethyloldimethylhydantoin, monomethyloldimethylhydantoin, and dimethylhydantoin having less than 0.1% by weight of free formaldehyde based upon 100% by weight of total composition; and wherein the weight ratio of dimethyloldimethylhydantoin to monomethyloldimethylhydantoin ranges from about 1:1.25 to about 3.5:1, are provided. These compositions may be prepared (1) by reacting dimethylhydantoin and a formaldehyde-containing source wherein the molar ratio of formaldehyde to dimethylhydantoin ranges from about 1.2:1 to about 1.55:1 or (2) by admixing (a) from about 80 to about 90% by weight of an aqueous solution of methyloldimethylhydantoin having greater than about 0.1% by weight of free formaldehyde with (b) about 20 to about 10% by weight of dimethylhydantoin based upon 100% weight of aqueous dimethyloldimethylhydantoin solution and dimethylhydantoin combined.</p> |
申请公布号 |
GR3021711(T3) |
申请公布日期 |
1997.02.28 |
申请号 |
GR19960403104T |
申请日期 |
1996.11.20 |
申请人 |
LONZA INC. |
发明人 |
FARINA, THOMAS E.;ROSEN, MARVIN |
分类号 |
A61K8/49;A01N43/50;A61K8/35;A61K31/415;A61K31/4166;A61L2/16;A61P31/04;C07D233/72;C07D233/78;(IPC1-7):C07D233/78 |
主分类号 |
A61K8/49 |
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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