Polyhydroxy aromatic coating compositions for reinforcing glass fibers used in cementitious products
Patent 4109051 Issued on August 22, 1978. Estimated Expiration Date: 
January 6, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 6, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2294826 3502610 3698935 3725123 3783092 3790606 InventorAssigneeApplicationNo. 05/646785 filed on 01/06/1976US Classes:428/375, Coated or with bond, impregnation or core106/664, Portland type cement containing106/711, Mineral fibers or glass fibers containing (e.g., slag wool, cotton wool, mineral wool, rock wool, etc.)106/724, Organic material containing106/802, Organic material containing106/808, Organic nitrogen428/378, Coating on discrete and individual rods, strands or filaments428/391, Silane, silicone or siloxane in coating428/392Artificial fiber or filamentExaminersPrimary: Kendell, Lorraine T.Attorney, Agent or FirmInternational ClassesC03C 13/00 (20060101)C03C 25/10 (20060101) C04B 20/10 (20060101) C04B 20/12 (20060101) C04B 20/00 (20060101) C04B 24/38 (20060101) C04B 28/00 (20060101) C04B 24/02 (20060101) C04B 24/00 (20060101) C04B 24/12 (20060101) C04B 24/06 (20060101) C04B 28/02 (20060101) Foreign Application Priority Data1973-07-03 GBAbstractA composition for coating glass fibers intended for use as reinforcement in cementitious products, containing, as a protective material, at least one monocyclic or polycyclic aromatic compound which has at least three hydroxyl groups on the aromatic ring or (in a polycyclic compound) on at least one of the aromatic rings, said composition, when applied to a strand of glass fibres which is subsequently encased in a block of ordinary Portland cement paste which is allowed to cure and kept for 28 days at 50° C, producing an improvement of at least 10% in the tensile strength of the strand as compared with that of a strand similarly treated and tested but without application of said composition. Preferably, the aromatic compound is soluble in a calcium hydroxide solution. A preferred compound is pyrogallol. | |
