| abstract |
1286725 Coated glass fibres PPG INDUSTRIES Inc 20 May 1970 [21 May 1969] 24363/ 70 Heading B2E [Also in Division C3] Glass fibres are sized by coating with aqueous compositions comprising (1) 2 to 15 weight per cent of a polypropylene or polyethylenepolypropylene emulsion, (2) a coupling agent and (3) a textile lubricant, the total solids content of the compositions being 2 to 20 weight per cent. The compositions may .be applied to the fibres directly after spinning and before grouping to form strands, by means of a roller applicator partly immersed in the size. The fibres may be further prepared for reinforcing resins and elastomers by coating with adhesive compositions comprising a rubber latex and a thermosetting resin. The coupling agent may be a silane or siloxane, a hydroxy salt of chromium, nickel, copper or lead and a strong mineral acid, or a Werner complex of a chromic salt. The lubricant may be an acid solubilised fatty acid amide, alkyl imidazoline or quaternary pyridinium compound. The size may also contain a wetting agent, e.g. an amine salt or polyoxyethylene sorbitan fatty acid ester. Examples describe the coating of glass fibres with sizes comprising water, silicone defoamer, acetic acid and (I) polypropylene, polyvinyl alcohol, imidazoline and methacryloxypropyl trimethoxysilane and (II to IV) polyethylene, polypropylene, amino ethyl ethanolamine/hydrogenated tallow fatty acid condensates, stearylamine, polyamide resin and aminopropyl triethoxysilane; and the coating of the sized fibres with adhesives comprising water, resorcinol, formaldehyde and (V) butadiene/styrene/vinyl pyridine copolymer latex, sodium and ammonium hydroxides, (VII) butadiene/styrene copolymer latex and sodium hydroxide, (VIII) neoprene latex, magnesium oxide, zinc oxide, sodium hydroxide, phenyl naphthylamine and surfactant and (IX) neoprene latex, butadiene/styrene/vinyl pyridine copolymer latex, magnesium oxide and sodium and ammonium hydroxides. |