Patent GB-907302-A (GB)
Title: Improved glass fibre structures
IPC: C03C25/26
Filed: 1958-12-18
Abstract: An aqueous composition for coating and bonding glass fibres comprises (1) a binder material of high molecular weight or polymeric nature having free hydroxyl, amino and/or carboxyl groups and (2) 0,02-2,0% of gammaamino propyl triethoxysilane.  Specified binder materials include phenol formaldehyde resins, urea formaldehyde resins, melamine formaldehyde resins, urea-boric acid-formaldehyde-polyhydric alcohol condensation reaction products, polyesters, acrylic acid and alkyl-acrylic acid polymers, epoxy resins, polyurethanes and cellulose ethers and esters.  In the examples the compositions are prepared from water and (1) phenol-formaldehyde A-stage resin, alcohol insoluble residue of pinewood pitch, petroleum oil and gamma-amino propyl triethoxysilane and (2)-(4) a urea borate (i.e. the condensation product of urea, boric acid, formaldehyde and ethylene glycol), melamine-formaldehyde resin, phenol formaldehyde resin, an alkyd resin prepared from phthalic anhydride and glycol, lubricating oil and gamma-amino propyl triethoxysilane.ALSO:An aqueous composition for coating and bonding glass fibres comprises (1) a binder material of high molecular weight or polymeric nature having free hydroxyl, amino and/or carboxyl groups and (2) 0.02-2.0% of gamma-amino-propyl triethoxysilane. Specified binder materials include synthetic resins as well as cellulose ethers and esters, starches and other carbohydrates, albumens, gelatin and alginates.ALSO:Glass fibres are coated with an aqueous mixture of (1) a binder material of high molecular weight or polymeric nature having free hydroxyl, amino and/or carboxyl groups and (2) 0.02-2.0% of g -aminopropyl triethoxysilane.  Specified binder materials include phenol-formaldehyde resins, urea-formaldehyde resins, melamine-formaldehyde resins, urea-boric acid-formaldehyde-polyhydric alcohol condensation reaction products, polyesters, e.g. the reaction products of phthalic anhydride and glycol, acrylic acid and alkyl-acrylic acid polymers, epoxy resins, polyurethanes, cellulose ethers and esters, starches and other carbohydrates, albumens, gelatin and alginates.  The phenol-formaldehyde resin can be admixed with the insoluble residue of pinewood pitch.  The glass fibres may be discontinuous or staple fibres or continuous textile fibres.  In the examples the coating compositions are prepared from water and (1) phenol-formaldehyde A-stage resin, alcohol insoluble residue of pinewood pitch, petroleum oil and g -aminopropyl triethoxysilane, (2)-(4) a urea-borate (i.e. the condensation product of urea, boric acid, formaldehyde and ethylene glycol), melamineformaldehyde resin, phenol-formaldehyde resin, an alkyd resin prepared from phthalic anhydride and glycol, lubricating oil and the silane and (5) partially dextrinised starch, hydrogenated coconut oil, butyl stearate (wetting agent), a polyglycol ester of oleic acid (emulsifying agent) and the silane.ALSO:An aqueous composition for coating and bonding glass fibres comprises (1) a binder material of high molecular weight or polymeric nature having free hydroxyl, amino and/or carboxyl groups and (2) 0,02-2,0% of gamma-aminopropyl triethoxysilane. Specified binder materials include synthetic resins as well as cellulose ethers and esters, starches and other carbohydrates, albumens, gelatin and alginates.  In Example 5, the composition comprises water and dextrinized starch, hydrogenated coconut oil, butyl stearate, a polyglycol ester of oleic acid and the silane. The glass fibres coated may be discontinuous or staple fibres in which case they are allowed to fall through a collecting hood on to a moving belt to form a mat of interfelted fibres which is then compressed to give a board-like product.