Resin formulation
OwnerJohn A. Campese, Peter J. Fritzinventors
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Abstract
The invention provides a composite part comprising a matrix and coated, hollow microspheres. The coated, hollow microspheres are generally polymeric spheres with an inorganic exterior coating such as calcium carbonate. In one embodiment, the composite part is a fenestration component formed by a pultrusion process, and may include reinforcing fiber material such as roving or mat. In some embodiments, the matrix is made from a curable precursor that includes a thermosetting resin and coated, hollow microspheres. A method for making a pultruded composite part incorporating coated, hollow microspheres is also provided.
Claims68
A pultruded composite part having a matrix containing coated, hollow microspheres.
The pultruded composite part of claim I having a wall thickness of about 0.075 inches or less.
A composite part comprising a matrix including a plurality of coated, hollow microspheres, the composite part having an exterior surface with an arithmetic mean roughness of less than about 55 microinches.
A precursor composition for making fenestration components comprising a curable mixture of:
- a polymeric resin;
- a plurality of coated, hollow microspheres;
- and
- a low-profile additive.
A method of making a pultruded composite part comprising:
- shaping strands of roving to provide a shaped reinforcement;
- contacting the shaped reinforcement with a curable composition comprising coated, hollow microspheres to provide an impregnated reinforcement;
- pulling the impregnated reinforcement into a die to provide a green part;
- and
- curing the green part in the die to provide a pultruded composite part.
Dependencies are inferred from the claim text.