Photoinitiated Resins for Prepregs and Coatings
Original Publication Date: 1988-Mar-01
Included in the Prior Art Database: 2005-Feb-14
Resins and resin mixtures are selected to cure only when photoinitiated, thereby providing a potentially indefinite storage period for the resins and items treated by the resins. Single resins may be employed in combination with a photoinitiator, while mixtures of resins permit selection of softening points and viscosity. Standard glass fiber mats may be impregnated as prepregs well before treatment to achieve the hardened (C-cured) state. The materials may act as permanent resist coatings. Typically, prepregs cure under the action of heat alone, and storage life and the like is quite limited. The following materials may be stored indefinitely as B-stage, or uncured prepregs, assuming storage in the dark or under yellow light.