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US 7,666,938 B2Granted
Nanoparticle silica filled benzoxazine compositions
AssigneeHenkel Corporation
InventorsWei Helen Li, Stanley L. Lehmann, Raymond S. Wong
Life of this patent
Estimating the term…
Abstract
Curable compositions, such as benzoxazine-based ones, are useful in applications within the aerospace industry, such as for example as a heat curable composition for use as a matrix resin or an adhesive, and form the basis of the present invention.
Claims19
A heat curable composition comprising:
- (a) a benzoxazine component comprising one or more of
- wherein o is 1-4, X is selected from the group consisting of the group consisting of a direct bond (when o is 2), alkyl (when o is 1), alkylene (when o is 2-4), carbonyl (when o is 2), thiol (when o is 1), thioether (when o is 2), sulfoxide (when o is 2), and sulfone (when o is 2), R1 is selected from the group consisting of hydrogen, alkyl, and aryl, and R4 is selected from hydrogen, halogen, alkyl, and alkenyl, or
- wherein p is 1-4, Y is selected from the group consisting of biphenyl (when p is 2), diphenyl methane (when p is 2) and derivatives thereof, diphenyl isopropane (when p is 2), diphenyl sulfide (when p is 2), diphenyl sulfoxide (when p is 2), diphenyl sulfone (when p is 2), and diphenyl kerone (when p is 2), and R4 is selected from the group consisting of hydrogen, halogen, alkyl and alkenyl;
- and
- (b) a silica nanoparticle reinforced epoxy resin component, wherein said epoxy resin is selected from the group consisting of a cycloaliphatic epoxy resin matrix, a bisphenol A epoxy resin matrix, and a bisphenol F epoxy resin matrix;
- wherein said silica nanoparticle reinforced epoxy resin component is present in an amount of from 3 to 30% by weight of the total composition.
3 more elements
A syntactic composition comprising the heat curable composition:
- (a) a benzoxazine component comprising one or more of
- wherein o is 1-4, X is selected from the group consisting of the group consisting of a direct bond (when o is 2), alkyl (when o is 1), alkylene (when o is 2-4), carbonyl (when o is 2), thiol (when o is 1), thioether (when o is 2), sulfoxide (when o is 2), and sulfone (when o is 2), R1 is selected from the group consisting of hydrogen, alkyl, and aryl, and R4 is selected from hydrogen, halogen, alkyl, and alkenyl, or
- wherein p is 1-4, Y is selected from the group consisting of biphenyl (when p is 2), diphenyl methane (when p is 2) and derivatives thereof, diphenyl isopropane (when p is 2), diphenyl sulfide (when p is 2), diphenyl sulfoxide (when p is 2), diphenyl sulfone (when p is 2), and diphenyl ketone (when p is 2), and R4 is selected from the group consisting of hydrogen, halogen, alkyl and alkenyl;
- and
- (b) a silica nanoparticle reinforced epoxy resin component, wherein said epoxy resin is selected from the group consisting of a cycloaliphatic epoxy resin matrix, a bisphenol A epoxy resin matrix, and a bisphenol F epoxy resin matrix;
- wherein said silica nanoparticle reinforced epoxy resin component is present in an amount of from 3 to 30% by weight of the total composition.
3 more elements
A process for producing a heat curable composition, steps of which comprise:
- (a) providing a benzoxazine composition comprising
- wherein o is 1-4, X is selected from the group consisting of the group consisting of a direct bond (when o is 2), alkyl (when o is 1), alkylene (when o is 2-4), carbonyl (when o is 2), thiol (when o is 1) thioether (when o is 2), sulfoxide (when o is 2), and sulfone (when o is 2), R1 is selected from the group consisting of hydrogen, alkyl, and aryl, and R4 is selected from the group consisring of hydrogen, halogen, alkyl, and alkenyl, or
- wherein p is 1-4, Y is selected from the group consisting of biphenyl (when p is 2), diphenyl methane (when p is 2) and derivatives thereof, diphenyl isopropane (when p is 2), diphenyl sulfide (when p is 2), diphenyl sulfoxide(when p is 2), diphenyl sulfone (when p is 2), and diphenyl ketone (when p is 2), and R4 is selected from the group consisting of hydrogen, halogen, alkyl and alkenyl;
- and
- (b) providing with mixing a silica nanoparticle reinforced epoxy resin component, wherein said epoxy resin is selected from the group consisting of a cycloaliphatic epoxy resin matrix, a bisphenol A epoxy resin matrix, and a bisphenol F epoxy resin matrix;
- and wherein said silica nanoparricles are pre-dispersed in the epoxy resin;
- and
- (c) mixing the benzoxazine composition of (a) and the silica component of (b) under conditions appropriate to produce the heat curable composition.
5 more elements
Dependencies are inferred from the claim text.