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US 6,207,786 B1Granted
Ternary systems of benzoxazine, epoxy, and phenolic resins
AssigneeEdison Polymer Innovation Corporation
InventorsHatsuo Ishida, Sarawut Rimdusit
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Abstract
Low viscosity ternary mixtures of benzoxazine, epoxy and phenolic resins have been developed. The blends render homogeneous and void free cured specimen with a wide range of properties. Melt viscosity values as low as 0.3 Pa.s at 100° C. can be achieved. The phenolic resin acts as a cure accelerator to the system, besides its typical function as a hardener of epoxy resin. Glass transition temperatures Tg as high as 170° C. can also be obtained.
Claims20
A ternary composition comprising:
- a) from about 10 to about 80 weight percent of a benzoxazine monomer,
- b) from about 10 to about 80 weight percent of an epoxy reactant, and
- c) from about 1 to about 80 weight percent of a phenolic resin or phenolic compound wherein said weight percents are based upon the total binder from a, b, and c in said composition, and said benzoxazine monomer comprising on average at least two benzoxazine rings per molecule.
A ternary composition consisting essentially of:
- a) from about 10 to about 80 weight percent of a benzoxazine monomer;
- b) from about 10 to about 80 weight percent of an epoxy reactant;
- c) from about 1 to about 80 weight percent of a phenolic resin or phenolic compound wherein said weight percents are based upon the total binder from a, b, and c in said composition;
- d) optionally, a cationic ring opening initiator for polymerizing said benzoxazine;
- e) optionally, an initiator and/or catalyst for polymerizing said epoxy resin;
- and
- f) optionally, a curing agent or cure accelerator for the phenolic resin.
4 more elements
Dependencies are inferred from the claim text.