Phosphorus-containing flame-retardant hardener, and epoxy resins cured by the same
AssigneeNational Science Council
InventorsChun-Shan Wang, Jeng-Yueh Shieh
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Abstract
The present invention discloses an active-hydrogen-containing curing agent having a phosphorus group, and a flame retardant cured epoxy resin which can be prepared via an addition reaction between the active hydrogen and the epoxide group of an epoxy resin. The cured flame retardant epoxy resin is environmentally friendly and is suitable for printed circuit board and semiconductor encapsulation applications. The phosphorus group of the curing agent has a chemical structure as follows: 1 wherein Ar is a substituted or un-substituted phenyl or phenoxy.
Claims66
A phosphorus-containing hardener having a formula selecting from the group consisting of (a), (b), (c) and (d):
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- R1, R2 independently are H, C1˜C18 alkyl, C6˜C18 aryl, C6˜C18 substituted aryl, C6˜C18 aryl methylene, or C6˜C18 substituted aryl methylene;
- n′=0˜11;
- Z=—NH2, —NHR, or —R;
- o=1˜3;
- o′=3˜10;
- r=0˜6;
- R, Q and p are defined as above;
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- wherein R and r are defined as above;
- wherein either all the A or A′ in each formula of (a) to (d) are H, and at least one of the A is not H when all the A′ are H in each formula of (a) to (d), and at least one of the A′ is not H when all the A are H in each formula of (a) to (d).
Dependencies are inferred from the claim text.