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US 7,649,060 B2Granted
Curable compositions
AssigneeHenkel Corporation
InventorsWei Helen Li, Stanley L. Lehmann, Raymond S. Wong
Life of this patent
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Abstract
The present invention relates to curable compositions of benzoxazines, a combination of adducts one of which is prepared from hydroxy-containing compounds, isocyanate-containing compounds and phenolic compounds and the second of which is prepared from the first adduct and epoxy-containing compounds and phenolic compounds, epoxy resins and optionally tougheners.
Claims31
A curable composition comprising:
- A) a benzoxazine component,
- B) a combination of two adducts a first adduct of which is prepared from hydroxy-containing compounds, isocyanate-containing compounds, and an amino phenolic compound, wherein the first adduct has a molecular weight in the range of 55,000 to 90,000 Mn, and a second adduct of which is prepared from the first adduct, an epoxy-containing compound and a phenolic compound,
- C) an epoxy resin component, and
- D) one or more tougheners in addition to the combination of adducts of B).
1 more element
Dependencies are inferred from the claim text.