process for the production of glass fibre reinforced plastics, natural or synthetic fibres

摘要

Fibre-reinforced polyacrylic or polymethacrylic acid esters are produced by a process comprising treating glass fibres or synthetic or natural fibres with a compound that contains a labile chlorine atom and, if desired, with another component of the accelerator system, especially copper naphthenate in an amount of 10-3,000 p.p.m. of the monomer, and then in a second stage treating the fibre with (A) a monomeric ester of acrylic or methacrylic acids which contains from 0.5 to 2.0% of an organic peroxide and which may contain up to 50% of a polymeric substance (B) and, if necessary, up to 80% of a further monomeric polymerizable compound (C) and finally curing the product. The compound containing a labile chlorine atom may be hydrochloric acid or a quaternary ammonium chloride such as phenyl ethyl dibutylamine hydrochloride and is preferably sprayed on to the fibres as a solution in water, methanol, acetone, methyl acetate or methyl methacrylate. At the same time organic sulphur compounds such as a -aminosulphones, a -oxysulphones or mercaptans may be applied. The polymeric substance (B) may be a polymer of an ester of acrylic or methacrylic acid which may be an unsaturated polyester resin. The compound (C) may be styrene, vinyl acetate, acrylonitrile, vinyl toluene, diallyphthalate, allyl methacrylate, ethylene glycol dimethacrylate, triallyl cyanurate or divinyl benzene. Up to 1.0% of a hydroperoxide may be present in addition to the peroxide. The organic sulphur compounds may be added with the resin instead of sprayed on to the fibre and is present up to 0.5%. Curing is carried out at room temperature. The fibres may be in the form of mats, fabrics, strands or fibres. Specification 768,843 is referred to.