Rutgerswerke Aktiengesellschaft

Rolf Muller

Karl Jellinek

Gerhard Wisomirski

An improved moisture-stable phenolic resin binder with calcium ions from the catalyst complexed with the phenolic resin and a process for its preparation and laminate boards with the said binder as the binding agent.

Novel calcium hydroxide catalyzed phenolic resin binder and method

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.

Production of inorganic fiber products

A binder for cellulose fiber reinforced board material comprising a mixture of:

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Duisburg, Germany

Rolf Muller