Flame-retardant resin composition and prepreg and laminate using the same
AssigneeSumitomo Bakelite Co., Ltd.
InventorsAkihiko Tobisawa, Tomoyoshi Honjoya
Life of this patent
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Abstract
The present invention provides a flame-retardant resin composition having high flame retardancy without using any halogen compound and suited for printed circuit boards. Specifically, it provides a flame-retardant resin composition containing as its essential constituents: (A) a novolak epoxy resin, (B) a novolak resin, and (C) a phosphorus compound reactable with said epoxy resin or novolak resin, and also provides prepregs and laminates or copper-clad laminates using this resin composition.
Claims11
A flame-retardant resin composition containing as its essential constituents:
- (A) a novolak epoxy resin,
- (B) a triazine-modified novolak resin represented by the formula 4:
- wherein R is NH2, alkyl group or phenyl group;
- and m and n are each a natural number, and
- (C) a 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide.
A flame-retardant resin composition containing as its essential constituents:
- (A) a novolak epoxy resin,
- (B) at least one member selected from the group consisting of a phenolic aralkyl resin represented by the formula 5, a naphthalene aralkyl resin represented by the formula 6, a biphenyl-modified novolak resin represented by the formula 7 and a toluene-, xylene- or mesitylene-modified novolak resin represented by the formula 8:
- wherein n is a natural number,
- wherein n is a natural number,
- wherein n is a natural number,
- wherein m and n are each a natural number, and l is a number of 1, 2 or 3, and
- (C) a 9, 10-dihydro-9-oxa-10phosphaphenanthrene-10-oxide.
A flame-retardant resin composition containing as its essential constituents:
- (A) a novolak epoxy resin,
- (B) a novolak resin and a bisphenol S compound represented by the formula 9:
- wherein R1, R2, R3 and R4 are each a hydrogen, an alkyl group or an aryl group, and
- (C) a 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide.
Dependencies are inferred from the claim text.