Resin manufacture

Details Resin manufacture Resin manufacture

C - Chemistry, Metallurgy

08

G

402/70

C08G 12/12 (2006.01) C08L 61/24 (2006.01) C08L 61/28 (2006.01)

Patent

CA 1238998

Abstract A solid urea-formaldehyde resin is provided, having a degree of condensation of 25% to 45%. A process for making the resin is also described and includes several steps. Urea and formaldehyde is first reacted with a molar ratio of U:F of 1:2.5 or more then concentrated. Further urea is added to reduce the ratio to the range 1:1.1 to 1:2 and further concentration is achieved without precipitation of solid resin by the use of a stabilization agent.

474900

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