초록 ▼

A novel metal modified novolak resin is prepared. The metal modified novolak resin is an electron acceptor and is further characterized by its compatability with the surface properties of a paper substrate. The metal modified novolak resin comprises a reaction product of a novolak resin and a metal

A novel metal modified novolak resin is prepared. The metal modified novolak resin is an electron acceptor and is further characterized by its compatability with the surface properties of a paper substrate. The metal modified novolak resin comprises a reaction product of a novolak resin and a metal salt. The novolak resin is a reaction product of a mixture containing a para-substituted phenol selected from the group consisting of paraalkylphenols having alkyl groups of about 1 to about 12 carbon atoms, paraphenylphenol and mixtures thereof, salicylic acid and formaldehyde. The novel metal modified novolak resin is prepared by heating a mixture containing one or more para-substituted phenols, salicylic acid, formaldehyde and an acid catalyst for a period of time sufficient to substantially completely react the phenols, salicylic acid and formaldehyde to form a melted novolak resin. The melted novolak resin is mixed with a zinc salt in a inert atmosphere to form the metal modified novolak resin. The metal modified novolak resin prepared as above can be coated on a paper substrate to produce a pressure-sensitive paper.

대표청구항 ▼

A metal modified novolak resin, said metal modified novolak resin being an electron acceptor suitable for use in a pressure-sensitive copy system and being co-reactive with color precursors of the electron donor type, said metal modified novolak resin being further characterized by compatability wit

A metal modified novolak resin, said metal modified novolak resin being an electron acceptor suitable for use in a pressure-sensitive copy system and being co-reactive with color precursors of the electron donor type, said metal modified novolak resin being further characterized by compatability with the surface properties of a paper substrate, said metal modified novolak resin comprising a reaction product of a novolak resin and a metal alkanoate salt of an alkanoic acid having 1 to 3 carbon atoms, the metal being selected from the group consisting of copper, zinc, cadmium, aluminum, indium, tin, chromium, cobalt and nickel, said novolak resin being a reaction product in the presence of an acid catalyst of a mixture consisting essentially of: (a) a para-substituted phenol selected from the group consisting of para-alkylphenols having an alkyl group of from about 1 to about 12 carbon atoms, para-phenylphenol and mixtures thereof; (b) salicylic acid; and (c) formaldehyde. A pressure-sensitive paper comprising a paper substrate containing on one surface thereof a coating containing a metal modified novolak resin which is co-reactive with color precursors of the electron donor type comprising a reaction product of a novolak resin and a metal alkanoate salt of an alkanoic acid having 1 to 3 carbon atoms, the metal being selected from the group consisting of copper, zinc, cadmium, aluminum, indium, tin, chromium, cobalt and nickel, said novolak resin being a reaction-product in the presence of an acid catalyst of a mixture consisting essentially of: (a) a para-substituted phenol selected from the group consisting of para-alkyl phenols having an alkyl group of 1 to about 12 carbon atoms, para-phenylphenol and mixtures thereof, (b) salicylic acid, and (c) formaldehyde, said metal modified novolak resin being compatible with the surface characteristics of said paper substrate.