C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/5413
C08L 61/06 (2006.01)
Patent
CA 1074478
ABSTRACT OF THE DISCLOSURE Disclosed is a method for forming an aldehyde-phenolic condensation copolymer, which comprises: forming an essentially linear and non-cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25°C by reacting an aldehyde with a phenolic compound in the presence of an alkali catalyst, forming a highly thermosettable and cross-linkable aldehyde condensation prepolymer having a viscosity of 5 cps to 75 cps at 25°C by reacting an aldehyde with a phenolic com- pound in the presence of an alkali catalyst; admixing from 90% - 10% by weight of the linear aldehyde prepolymer with l0% - 90% by weight of the highly thermosettable! prepolymer; and co- polymerizing the mixture thereby obtaining a copolymer having a viscosity of 30 to 3000 cps at 25°C. The invention also includes the condensation compolymer produced by the inventive method.
233561
Chen Chia M.
Rice James T.
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