Pourable polyurethane foam with energy attenuating properties
AssigneeTextron Innovations Inc.
InventorSuvankar Mishra
Life of this patent
Estimating the term…
Abstract
Embodiments are directed to a pourable foam comprising a first resin component comprising a polymeric methylene diphenyl diisocyanate, a second resin component comprising a polyol, and a barium sulfate powder component. The barium sulfate powder component is combined with the second resin component prior to combining the first and second resin components. The barium sulfate component may comprise between 1% and 50% of the pourable foam. The pourable foam may be used to repair or create aircraft components.
Claims20
A component, comprising:
- a composite structure disposed between an upper skin and a lower skin;
- a void region between the upper skin and the lower skin;
- and
- an energy attenuating foam substantially filling the void region, the energy attenuating foam comprising a first resin component, a second resin component, and a barium sulfate component, wherein energy attenuating properties of the foam are controlled by a proportion of the barium sulfate component in the foam selected to create a foam cell size in the range of 0.006 to 0.017 inches.
A method for providing a component, the method comprising:
- preparing a pourable foam, comprising:
- combining a barium sulfate powder component with a first resin component;
- controlling energy attenuating properties of the pourable foam by selecting a proportion of the barium sulfate component in the foam to create a foam cell size in the range of 0.006 to 0.017 inches;
- and
- mixing the combination of the first resin component and the barium sulfate powder with a second resin component to create the pourable foam;
- depositing the pourable foam in a void region between an upper skin and a lower skin of a composite component;
- and
- allowing the pourable foam to cure in the void region.
A method for providing a component, the method comprising:
- preparing a pourable foam, comprising:
- combining a barium sulfate powder component with a first resin component;
- controlling energy attenuating properties of the pourable foam by selecting a proportion of the barium sulfate component in the foam to create a foam cell size in the range of 0.006 to 0.017 inches;
- and
- mixing the combination of the first resin component and the barium sulfate powder with a second resin component to create the pourable foam;
- depositing the pourable foam in a mold;
- allowing the pourable foam to form a blank shape in the mold;
- and
- machining the blank shape into a shape to substantially fill a void region between an upper skin and a lower skin of a composite component.
Dependencies are inferred from the claim text.