C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/1322, 400/54
C08G 12/36 (2006.01) C08G 12/12 (2006.01) C08L 61/24 (2006.01)
Patent
CA 1212493
ABSTRACT OF THE DISCLOSURE A cross-linked urea-formaldehyde polymer matrix is formed by catalyzing, using a buffered acid as the catalyst, an aqueous mixture of a urea-formaldehyde concentrate, urea-form- aldehyde resin, and powdered urea. The resulting thermoset polymer which possesses, in part, a cyclic structure, is of unusual hardness and has utility, with or without fillers, as a molding or casting material possessing controllable shrinkage characteristics because of uniform molecular structure and formula versatility.
428258
Chem-Nuclear Systems Inc.
Smart & Biggar
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