发明名称 |
Flame retardant B-staged epoxy resin prepregs and laminates made therefrom |
摘要 |
A prepreg useful in flame resistant copper clad printed circuit boards is made by impregnating a porous substrate with an impregnant containing: either a prebrominated epoxy resin or a mixture of a non-halogenated epoxy resin and flame retarding additive containing bromine, and phenolic hydroxyl groups. A phenolic novolac oligomer having an average of over 2.5 phenolic hydroxyl groups per oligomeric unit is used as curing agent. Optionally, a suitable catalyst may be included. The impregnated substrate is heated to cure or advance the resin to the "B"-stage.
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申请公布号 |
US4501787(A) |
申请公布日期 |
1985.02.26 |
申请号 |
US19830490098 |
申请日期 |
1983.04.29 |
申请人 |
WESTINGHOUSE ELECTRIC CORP. |
发明人 |
MARCHETTI, JOSEPH R.;THOMAS, WILBUR R. |
分类号 |
C08L61/00;B32B15/08;B32B15/092;C08G59/00;C08J5/10;C08J5/24;C08L61/04;C08L63/00;C08L77/00;H05K1/03;(IPC1-7):B32B7/00;B32B17/10;H05K1/00 |
主分类号 |
C08L61/00 |
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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