发明名称 |
Microencapsulated red phosphorus |
摘要 |
A method for preparing encapsulated red phosphorus is disclosed. The method entails obtaining a material system that contains dispersed particulate red phosphorus having a mean particle size of 0.1 to 100 mum in an aqueous phase that comprise urea, formaldehyde and a water-soluble silicon dioxide precursor, adding to the material system a sufficient amount of acid to lower the pH to 0 to 5 and maintaining the resulting acidic system at a temperature of 80 to 120° C. for a period longer than one hour. The encapsulated red phosphorus of the invention is suitable for using as a flame retarding agent for plastics molding compositions.
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申请公布号 |
US2002188048(A1) |
申请公布日期 |
2002.12.12 |
申请号 |
US20020155043 |
申请日期 |
2002.05.24 |
申请人 |
WAGNER MICHAEL;PODSZUN WOLFGANG;PEERLINGS HENRICUS |
发明人 |
WAGNER MICHAEL;PODSZUN WOLFGANG;PEERLINGS HENRICUS |
分类号 |
C08J5/00;B01J13/18;C01B25/00;C08K3/34;C08K7/14;C08K9/02;C08K9/08;C08K9/10;C08L101/00;C09K21/04;(IPC1-7):C08K3/32;C08K9/00 |
主分类号 |
C08J5/00 |
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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