PHENOL FORMALDEHYDE RESOLES AND LAMINATES.

专利名称：PHENOL FORMALDEHYDE RESOLES AND

LAMINATES.

发明人：GILLERN, M. FRANK,OITA, KATASHI,TENG,

ROBERT J.,TIEDEMAN, GEORGE T.

申请号：EP81901024申请日：19801106公开号：EP0064055A4公开日：19830406

摘要：Low-color or white, dilutable condensation products of formaldehyde andphenol in molar ratios of 1.9-5.0:1, characterized by carbon-13 nuclear magneticresonance spectra as having at least about 30 molar percent of the total formaldehydecontent of the resin bound to phenol nuclei in benzyl formal groups of the form Ph-(CHuO)u-CHuOH wherein n //cB6 1, and less than about 40 molar percent of the totalformaldehyde content of the resin bound to phenol nuclei in methylol groups of theform Ph-CHuOH, wherein Ph is a phenol nucleus. Phenol, water and an alkaline catalyst,limited to 05-2.2 moles of catalyst per 100 moles of phenol and preferably lithiumcarbonate, are mixed with formaldehyde at 1.9-5.0 formaldehyde to phenol ratios. Thereaction mixture is heated at a uniform rate over 1 hour to reflux temperature andrefluxed until a viscosity of 400-500 centipoise at 50-75% solids is attained. The mixture iscooled to 50`C and neutralized with acid to a pH of 3-7, preferably with citric acid. Theresulting resin may be employed, without solvent dilution, to make resin-fiberglasslaminates that have strengths comparable to polyester or epoxy laminates. Thelaminates have exceptional fire resistance and low smoke evolution when exposed to

flame.

申请人：WEYERHAEUSER COMPANY

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