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US 3,944,515 AGranted
Molding compounds
AssigneeOwens-Corning Fiberglas Corporation
InventorsKevin M. Foley, Frank Paul McCombs, Reuben H. Bell
Life of this patent
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AssigneeOwens-Corning Fiberglas Corporation
InventorsKevin M. Foley, Frank Paul McCombs, Reuben H. Bell
Estimating the term…
A method for producing a phenolic molding is disclosed. The method includes the steps of mixing phenol, formaldehyde and a hydraulic cement, forming the resulting composition to a predetermined shape and maintaining the composition in the predetermined shape until an insoluble, infusible article is formed by condensation. At least 10 percent of the hydraulic cement must be Portland cement. The mole ratio of formaldehyde to phenol must be at least 1:1, and the amount of hydraulic cement must be sufficient for reaction with from 1 to 9 times the sum of the water of condensation of the phenol with the formaldehyde and the water charged to the mix. The use of reinforcing glass fibers in producing phenolic moldings is also disclosed, as well as the use of urea and resorcinol in addition to the phenol, formaldehyde and hydraulic cement.
A method for producing a phenolic molding which includes the steps of mixing phenol, formaldehyde and a hydraulic cement at least 10 percent of which is Portland cement in such proportions that the mole ratio of formaldehyde to phenol is at least 1:1 and the weight of the hydraulic cement is from one to nine times the sum of the weight of the water charged to the mix and three-fifths of the weight of the formaldehyde charged to the mix, forming the resulting composition to a predetermined shape and maintaining the composition in the predetermined shape until an insoluble, infusible article is formed by condensation.
Dependencies are inferred from the claim text.