Patent GB-1087905-A (GB)
Title: Glass fibre-elastomer assembly with catalytically-activated anchoring materials
IPC: C07F7/08
Filed: 1963-12-05
Abstract: An elastomer is bonded to glass fibres through an anchoring agent that comprises either magnesium chloride or a Friedel-Crafts catalyst and an anchoring material which can by chemical interaction (a) attach to the surfaces of the fibres and (b) interact with the elastomer.  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 one which, at least before it is fully cured, contains olefinic groups or halogen substituents or both, e.g. neoprene or chlorobutyl rubber.  The term "glass fibres" includes bundled strands of attenuated glass fibre or yarns, cords or fabrics formed therefrom; also included are flakes comprising extremely thin and flexible films of glass.  The anchoring material may be an organic compound which has an olefinic group or an aromatic group capable of undergoing Friedel-Crafts addition with the elastomer. Suitable organic compounds include vinyltrichlorosilane, allyltriethoxysilane, phenyldichlorosilane, methacrylato-chromic chloride and diphenyldihydroxysilane.  The two components of the anchoring agent may be applied together, e.g. by including them in a size applied to the fibres during formation, or succesively, in which case the catalyst may be applied over the anchoring material, or may be incorporated as a component in the elastomeric material. The anchoring agent may act as a curing or hardening agent for the elastomeric material.  In Example 1, glass fibres are sized with an aqueous solution containing ammonia, aluminium chloride and vinyltrichlorosilane. In Example 3, glass fibres are treated with an aqueous solution of diphenyl-dihydroxysilane and then laminated with uncured neoprene containing 2% of aluminium chloride along with other fillers and pigments.ALSO:An elastomer is bonded to glass fibres through an anchoring agent that comprises either magnesium chloride or a Friedel-Crafts catalyst and an anchoring material which can by chemical interaction (a) attach to the surfaces of the fibres and (b) interact with the elastomer.  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 one which, at least before it is fully cured, contains olefinic groups or halogen substituents or both, e.g. neoprene or chlorobutyl rubber.  The term "glass fibres" includes bundled strands of attenuated glass fibre or yarns, cords or fabrics formed therefrom; also included are flakes comprising exteremely thin and flexible films of glass. The anchoring material may be an organic compound which has an olefinic group or an aromatic group capable of undergoing Friedel-Crafts addition with the elastomer.  Suitable organic compounds include vinyltrichlorosilane, allyltriethoxysilane, phenyldichlorosilane, methacrylate - chromic chloride and diphenyldihydroxysilane.  The two components of the anchoring agent may be applied together, e.g. by including them in a size applied to the fibres during formation, or successively, in which case the catalyst may be applied over the anchoring material, or may be incorporated as a component in the elastomeric material. The anchoring agent may act as a curing or hardening agent for the elastomeric material.  In Example 1, glass fibres are sized with an aqueous solution containing ammonia, aluminium chloride and vinyltrichlorosilane.  In Example 3, glass fibres are treated with an aqueous solution of diphenyldihydroxysilane and then laminated with uncured neoprene containing 2% of aluminium chloride along with other fillers and pigments.