Patent ID: 6472462
Filing Date: 2002-10-29
Classification: D04H,D06M

Abstract:
A process for prebinding fiber materials which comprises mixing a pulverulent binder composition comprisinga) a pulverulent copolymer obtained by emulsion polymerization and subsequent drying, of one or more monomers selected from the group consisting of vinyl esters, acrylic esters, methacrylic esters, vinylaromatics and vinyl chloride and 0.01 to 25% by weight, based on the total weight of the copolymer, of one or more ethylenically unsaturated carboxyl-containing monomers, the interpolymer having a glass transition temperature Tg or a melting point above 35Â° C., and optionally b) at least one pulverulent compound containing at least two reactive groups capable of reaction with the carboxyl groups mentioned under a), and having a melting point of 35Â° C. to 150Â° C., and mixing with the fibrous material and spreading out the mixture, or sprinkling the pulverulent binder on the spread-out fiber material and then binding the fiber material by raising the temperature to 50Â° C. to 250Â° C.