Spray-dried phenolic adhesives

Details Spray-dried phenolic adhesives Spray-dried phenolic adhesives

C - Chemistry, Metallurgy

08

G

402/40

C08G 8/10 (2006.01) C08G 8/08 (2006.01) C08G 8/28 (2006.01) C08G 8/38 (2006.01) C08J 3/12 (2006.01) C08L 61/06 (2006.01) C08L 61/10 (2006.01) C08L 3/00 (2006.01) C08L 97/00 (2006.01)

Patent

CA 1074044

Abstract of the Disclosure A method of preparing a modified phenol-formaldehyde resin in solid particulate form comprising reacting together, in an aqueous medium, phenol and formaldehyde, in a ratio of 1.0 mole phenol to between 1.8 and 3.5 moles of formaldehyde, in the presence of between 0.1 and 1.0 moles of a basic catalyst; continuing this reaction until a desired viscosity is reached; modifying the reaction system by adding thereto between 0% and 30%, based on the weight of phenol originally taken of a non-phenolic polyhydroxy compound; spray drying the thus modified liquid resin in a pressure nozzle drier, and chilling the spray dried particulate solid. These solid resins are redisper- sible in water and stable on storage, compared to the known aqueous, equivalent, systems.

259975

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