Patent GB-1087904-A (GB)
Title: Glass fibre-elastomer assembly
Inventor: MARZOCCHI ALFRED
IPC: C03C25/26
Filed: 1963-12-05
Abstract: An elastomer is bonded to glass fibres through an anchoring agent that is a partially polymerized polyfunctional organic compound and a solvent or plasticizer for the elastomeric material, when the latter is at an uncured or partly cured stage. The anchoring agent is first applied to the surfaces of the glass fibres, and the fibres are thereafter combined with the elastomer in an uncured or partly cured condition. The elastomer is a natural or synthetic rubber or rubber-like plastics material, e.g. neoprene or chlorobutyl rubber. The polyfunctional organic compound may contain groups that can react chemically with the elastomeric material, and may be caused to polymerize further in contact with the elastomeric material. Suitable polyfunctional compounds are partially polymerized divinylbenzene, dialkylbenzene, or ethylene dimethacrylate, or condensation products of formaldehyde and piperidine.  They may be applied to bare glass fibres as solutions in volatile solvents, e.g. their own monomers.  They may be applied during the forming process for the glass fibres or subsequently by impregnation of the glass fibres in which case the size normally applied to the fibres may be removed by heat cleaning.  The term "glass fibres" includes fibres in bundled, strand, yarn or fabric forms. The anchoring agent may be incorporated in a size, which is then applied to the glass fibres. A suitable size comprises partially dextrinized starch, hydrogenated vegetable oil, a cationic wetting agent and partially polymerized dialkylbenzene.ALSO:An elastomer is bonded to glass fibres through an anchoring agent that is a partially polymerized polyfunctional organic compound and a solvent or plasticizer for the elastomeric material, when the latter is at an uncured or partly cured stage. The anchoring agent is first applied to the surfaces of the glass fibres, and the fibres are thereafter combined with the elastomer in an uncured or partly cured condition.  The elastomer is a natural or synthetic rubber or rubber-like plastics material, e.g. neoprene or chlorobutyl rubber.  The polyfunctional organic compound may contain groups that can react chemically with the elastomeric material, and may be caused to polymerize further in contact with the elastomeric material.  Suitable polyfunctional p  compounds are partially polymerized divinylbenzene, diallylbenzene, or ethylene dimethacrylate, or condensation products of formaldehyde and piperidine.  They may be applied to bare glass fibres as solutions in volatile solvents, e.g. that own monomers.  They may be applied during the forming process for the glass fibres or subsequently by impregnation of the glass fibres in which case the size normally applied to the fibres may be removed by heat cleaning.  The term "glass fibres" includes fibres in bundled, strand, yarn or fabric forms.  The anchoring agent may be incorporated in a size, which is then applied to the glass fibres.  A suitable size comprises partially dextrinized starch, hydrogenated vegetable oil, a cationic wetting agent and partially polymerized diallylbenzene.