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US 4,053,322 AGranted
Method of preparing products comprising mineral fibres and a binder
OwnerKjeld Holbekinventor
Life of this patent
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Abstract
A method of preparing products comprising mineral fibres and a binder comprising the steps of admixing a noncured binder with mineral fibres which have been subjected to a heat treatment at a temperature of between 550.degree. and 900.degree. C to improve the chemical resistance of the fibres and to improve their distribution in the binder, and allowing the binder to cure.
Claims7
A method of preparing fiber reinforced articles which consist essentially of a matrix and mineral fibers distributed in the matrix, the method comprising the steps of
- heat treating a quantity of mineral fibers at a temperature of between 550.degree. C. and 900.degree. C. for a time sufficient to cause at least partial crystallization of the mineral fibers so that the surfaces thereof become uneven causing the mineral fibers to separate from each other,
- intimately mixing a major amount of a matrix material and a minor amount of the heat treated mineral fibers so that the separated mineral fibers are uniformly distributed throughout the matrix material, and
- causing the matrix material to set whereby the matrix material is bound securely to the individual separated heat treated mineral fibers producing articles of superior physical properties.
Dependencies are inferred from the claim text.