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US 4,226,962 AGranted
Production of novel metal modified novolak resins and their use in pressure sensitive papers
AssigneeThe Mead Corporation
InventorJohn J. Stolfo
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AssigneeThe Mead Corporation
InventorJohn J. Stolfo
Estimating the term…
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, para-phenylphenol 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 an 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.
A process for the preparation of 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 comprising:
A novolak resin, said novolak resin being useful in the preparation of 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 novolak resin being further characterized by compatability with the surface properties of a paper substrate, said novolak resin being a reaction product of a mixture consisting essentially of:
A process for the production of a novolak resin, said novolak resin being useful in the preparation of 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 novolak resin being further characterized by compatability with the surface properties of a paper substrate, said process comprising heating a mixture consisting essentially of:
Dependencies are inferred from the claim text.