Production of inorganic fiber products

Details Production of inorganic fiber products Production of inorganic fiber products

1985-05-06

1987-03-17

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524841, 528490, 252 62, C08L 6110

Patent

active

046508252

ABSTRACT:
An improved process for the production of glass and mineral fiber products bonded with a phenolic resin in which an aqueous phenol-formaldehyde resin is applied to the inorganic fiber as the bonding agent which is formed with calcium hydroxide as condensation catalyst and the mixture is thermally cured, the improvement comprising prior to processing the aqueous phenol-formaldehyde resin is adjusted to a pH of 7.5 to 11 by addition of a base and sulfate ions are added in an amount of 80 to 200% of the stoichiometric amount required for bonding the calcium ions whereby the calcium ions are converted into a water-soluble complex stable for at least three hours without any precipitation and the products produced thereby.

REFERENCES:
patent: 2748101 (1956-05-01), Shappell
patent: 3432453 (1969-03-01), Gladney et al.

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