Method for the preparation of polymers

Details Method for the preparation of polymers Method for the preparation of polymers

C - Chemistry, Metallurgy

08

G

C08G 14/04 (2006.01) C08G 8/10 (2006.01) C08L 61/06 (2006.01) C09D 161/10 (2006.01) C09J 161/10 (2006.01)

Patent

CA 2282778

A method for the manufacture of a phenolic resin emulsion and/or dispersion, wherein an aldehyde, a phenolic compound and an alkaline catalyst are allowed to react at a temperature of 40-100°C until a desired degree of condensation is achieved, and the pH of the resin is adjusted to a value below 9 using an acid, at a temperature below 100°C, in the presence of a surface active agent or a mixture of surface active agents. A phenolic resin emulsion and/or dispersion is obtained which provides a colourless or light-coloured glue line or surface when cured.

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