Abstract: An ink composition is provided which is suitable for use on plastic, bare metal, for example, tinplate or aluminum as well as on such metals having organic coatings applied to surfaces thereof. The inks are suitable for use in contact printers or in jet ink printing techniques and apparatus. The ink compositions are thermotropic, i.e. they change color in the presence of water or steam at elevated temperature and are useful as sterilization or pasteurization indicators. The inks comprise essentially a binder resin component, or mixture of such resin components, an alcohol solvent and a combination of dyes which produce a visible and permanent color change in the presence of water or steam at elevated temperatures.

Abstract: Aromatic onium salts, such as diaryliodonium salts, have been found to be effective thermal initiators for the polymerization of a variety of cationically polymerizable materials including epoxides, cyclic ethers, phenol formaldehyde resins, etc., when used in combination with various cocatalysts such as organic acids and copper salts.

Abstract: A flame-retardant phenolic resin which comprises the product obtained on(a) reacting at least one halogenated compound represented by the general formula (I) ##STR1## wherein A is --CH.dbd.CH.sub.2 or --O--CH.sub.2 --CH.dbd.CH.sub.2, X is a chlorine atom or a bromine atom, and n is an integer of 1, 2 or 3, with at least one phenol in the presence of an acidic catalyst; and(b) reacting the resulting reaction product with at least one phosphoric acid ester compound containing a phenolic OH group represented by the general formula (II), (III) or (IV). ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents an unsubstituted or substituted hydrocarbyl group, where R.sub.1 and R.sub.2 may be the same or different, and n is 1, 2 or 3, and at least one aldehyde or a precursor thereof in the presence of an acidic or alkali catalyst; and a process for producing the flame-retardant phenolic resin.

Abstract: This invention relates to an improved resin composition comprising an admixture of a phenol-aldehyde resole resin and a particular surface active rewetting agent wherein said rewetting agent being a reaction product of a polypropylene glycol and maleic anhydride.

Abstract: This invention relates to high ortho etherified resole resins. The resole resins are prepared by reacting under acidic conditions phenol with formaldehyde in the presence of a divalent electropositive metal. The resole resins are then etherified with an alcohol and dehydrated to less than 1 percent water. The novel high ortho etherified resole resins are useful in coating, bonding and adhesive compositions. Such resoles are readily curable with coreactive resins providing chemical and solvent resistance.

Abstract: There is described a new "one-step" bis A-formaldehyde resin, and a molding material containing the resin with which one may achieve molded products possessing excellent properties and almost optimum molding characteristics such as excellent molding latitude, low degree of mold shrinkage, high modulus at elevated temperature, a low degree of deformation at elevated temperatures, and excellent steam crack resistance and electrical properties. The molding material comprises a light colored bis-A formaldehyde resin and reinforcing filler for the resin. The resin is a heat convertible resin (resole) which comprises the product of the reaction of formaldehyde and bis A in the mole ratio of about 2 to about 3.75, in the presence of a catalytic amount of an alkali metal hydroxide or barium hydroxide condensation catalyst. The molding material of this invention is particularly desirable in making molded products by the injection molding or transfer molding processes.

Abstract: Rubber cement compositions which consist of rubbers and multi- (three and more) functional phenol-aldehyde modified bifunctional phenol resins, which are made by first obtaining the bifunctional phenolic resin by condensing 1 mole of bifunctional phenol with 0.5 to 3.0 moles of aldehydes in the presence of an alkaline catalyst, and then co-condensing 0.05 to 2.5 moles of multifunctional (three and more) phenols against 1 mol of the bifunctional phenols in the above-mentioned resin in the presence of an acidic catalyst, said co-condensed resin having a number average molecular weight of 700 - 1900, a resin melting point of 80.degree. - 160.degree. C, being curable and also being soluble in aromatic hydrocarbon solvents.

Abstract: Process for hardening liquid resols comprising using for the hardening, strong acids which if they are solid at room temperature are used in the form of their mixtures with inert finely divided solid diluents or if they are liquid or gaseous at room temperature adsorbed onto an adsorbing agent.