| 主权项 |
1. A process for curing a prepreg, comprising the steps of
Providing a prepreg comprising a thermosetting resin composition and fiber; Placing the prepreg under reduced pressure Exposing the prepreg under reduced pressure to a first elevated temperature for a time sufficient to:
remove about 1% by weight to about 3% by weight volatile materials in the prepreg, based on the total weight of the prepreg andincrease viscosity of the prepreg to a range of about 1 to about 40,000 Poise; Optionally, exposing the prepreg under reduced pressure to a second elevated temperature for a time sufficient to remove any remaining volatile materials in the prepreg; Exposing the prepreg under reduced pressure to a third elevated temperature for a time sufficient to cure the prepreg; and Exposing the cured prepreg to a fourth elevated temperature condition that is less than any one or more of the first, second or third elevated temperature conditions with or without reduced pressure. |
