Patent GB-1087902-A (GB)
Title: Glass fibre-elastomer assembly with metal oxide anchoring agents
IPC: C03C25/40
Filed: 1963-12-05
Abstract: An elastomer is bonded to glass fibres through an anchoring agent that is a metal oxide, can bond to the glass-fibre surfaces under the action of heat and can act as a catalyst in the curing of the elastomeric material.  Examples are magnesium oxide, zinc oxide and mixtures of these two.  The anchoring agent is first applied to 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.  Elastomers referred to are neoprene, chlorobutyl rubber and combinations of these with natural rubber compositions containing resinous acids.  The term "glass fibres" includes continuous filaments formed by attenuation from molten streams of glass, staple fibres formed by attenuation of molten streams of glass by blasts of air or steam, strands, yarns and fabrics formed of such filaments or staple, and thin flexible glass flakes.  The metal oxides can be applied from aqueous suspensions of the hydroxides or aqueous solutions of the chlorides, the pH being then lowered to deposit the hydroxide on the fibres, or an ammoniacal solution of the hydroxides can be deposited on the fibres.  In either case, the deposit is heated to convert it to the oxide.  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 soyabean oil, pelargonamide solubilized with acetic acid, an emulsifying agent and magnesium hydroxide.  The product may take the form of a glass-fibre-reinforced elastomer, an elastomeric-coated glass-fibre fabric or a laminate.ALSO:An elastomer is bonded to glass fibres through an anchoring agent that is a metal oxide, can bond to the glass-fibre surfaces under the action of heat and can act as a catalyst in the curing of the elastomeric material. Examples are magnesium oxide, zinc oxide and mixtures of these two. The anchoring agent is first applied to surfaces of the glass fibres, and the fibres are thereafter combined with the elastomer in an uncured or partly cured condition. The term "glass fibres" includes continuous filaments formed by attenuation from molten streams of glass, staple fibres formed by attenuation of molten streams of glass by blasts of air or steam, strands, yarns and fabrics formed of such filaments or staple, and thin flexible glass flakes.  The metal oxides can be applied from aqueous suspensions of the hydroxides or aqueous solutions of the chlorides, the pH being then lowered to deposit the hydroxide on the fibres, or an ammoniacal solution of the hydroxides can be deposited on the fibres.  In either case, the deposit is heated to convert it to the oxide.  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 soyabean oil, pelargonamide solubilized with acetic acid, an emulsifying agent and magnesium hydroxide.ALSO:An elastomer is bonded to glass fibres through an anchoring agent that is a metal oxide, can bend to the glass-fibre surfaces under the action of heat and can act as a catalyst in the curing of the elastomeric material. Examples are magnesium oxide, zinc oxide and mixtures of these two. The anchoring agent is first applied to 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.  Elastomers referred to are neoprene, chlorobutyl rubber and combinations of these with natural rubber compositions containing resinous acids.  The term "glass fibres" include continuous filaments formed by attenuation from molten streams of glass, staple fibres formed by attenuation of molten streams of glass by blasts of air or steam, strands, yarns and fabrics formed of such filaments or staple, and thin flexible glass flakes.  The metal oxides can be applied from aqueous suspensions of the hydroxides or aqueous solutions of the chlorides, the pH being then lowered to deposit the hydroxide on the fibres, or an ammoniacal solution of the hydroxides can be deposited on the fibres.  In either case, the deposit is heated to convert it to the oxide.  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 soyabean oil, pelargonamide solubilized with acetic acid, an emulsifying agent and magnesium hydroxide.ALSO:An elastomer is bonded to glass fibres through an anchoring agent that is a metal oxide, can bond to the glass-fibre surfaces under the action of heat and can act as a catalyst in the curing of the elastomeric material.  Examples are magnesium oxide, zinc oxide and mixtures of these two.  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.  Elastomers referred to are neoprene, chlorobutyl rubber and combinations of these with natural rubber compositions containing resinous acids.  The term "glass fibres" includes continuous filaments formed by attenuation from molten streams of glass, staple fibres formed by attenuation of molten streams of glass by blasts of air or steam, strands, yarns and fabrics formed of such filaments or staple, and thin flexible glass flakes.  The metal oxides can be applied from aqueous suspensions of the hydroxides or aqueous solutions of the chlorides, the pH being then lowered to deposit the hydroxide on the fibres, or an ammoniacal solution of the hydroxides can be deposited on the fibres.  In either case, the deposit is heated to convert it to the oxide.  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 soyabean oil, pelargonamide solubilized with acetic acid, an emulsifying agent and magnesium hydroxide.  The product may take the form of a glass-fibre-reinforced elastomer, an elastomeric-coated glass-fibre fabric or a laminate.