PROCESS FOR PREPARING LEAFS AND COATING MATERIALS ON THE BASE OF UNSATURATED POLYESTER RESINS

摘要

1504369 Coated paper SPRELA-WERKE SPREMBERG VEB 24 June 1975 [28 June 1974] 26714/75 Heading B2E A paper web is coated on one side with a pore-filling coating e.g. of polyurethane, then with a further coating of a separating agent e.g. polyvinyl alcohol, and then the other side is impregnated with a catalysed unsaturated polyester resin, the first side then being coated with an accelerator for polymerising the polyester resin, and the web is rolled up to bring the accelerator coated surface into contact with the polyester coated surface and allowed to harden.