Abstract: A radiation-sensitive composition comprising an admixture in a solvent of: at least one alkali-soluble binder resin, at least one photoactive compound and an effective sensitivity enhancing amount of at least one dimeric or trimeric unit formed by the condensation reaction of an aldehyde with sesamol; the amount of said binder resin being about 60 to 95% by weight, the amount of said photoactive component being about 5% to about 40% by weight, based on the total solids content of said radiation-sensitive composition.

Abstract: An etchant solution comprised of water and:(a) about 65% to 75% by weight phosphoric acid;(b) about 1% to 5% by weight nitric acid;(c) about 0% to 15% by weight acetic acid; and(d) about 0.005% to about 5% of an amine oxide surfactant having the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are each independently selected from the group consisting of lower alkyl group having 1-4 carbon atoms and lower alkoxy groups having 1-4 carbon atoms and R.sub.3 is a higher alkyl group having 8 to 18 carbon atoms or a mixture thereof.

Abstract: A charge director composition dispersed in at least one solvent comprising:A. a salt mixture comprised of 1-10 parts by weight each of:(i) a chromium salt of a C.sub.14-18 alkyl salicylic acid;(ii) a calcium didecyl sulfosuccinate; and(iii) a salt of the didecyl ester of sulfosuccinate acid and at least 50% of the basic nitrogen radicals of a copolymer of lauryl methacrylate, stearyl methacrylate and 2-methyl-5-vinyl pyridine, said copolymer having a vinyl pyridine content of 20-30% by weight and an average molecular weight of 15,000-250,000; andB. a salt-free copolymer of (i) laurylmethacrylate and (ii) a monomer selected from 2- or 4-vinylpyridine, styrene and N,N-dimethylaminoethylmethacrylate and mixtures thereof, said copolymer having a molecular weight from about 15,000 to about 100,000, and the weight ratio of monomers B(i) to B(ii) is from about 4:1 to about 50:1; and wherein the weight ratio of B:A is from 10:3 to about 40:3.

Abstract: Disclosed is a process for producing a zinc pyrithione product having an acceptable white or off-white color and containing substantially no undesired 2-hydroxypyridine-N-oxide or metal salt complexes thereof, by(1) making sodium pyrithione by reacting a 2-halopyridine-N-oxide with sodium hydrosulfide and sodium carbonate (or a mixture of sodium carbonate and sodium hydroxide) under selected addition temperatures and reaction temperatures and in selected mole ratios; followed by(2) making zinc pyrithione by reacting the sodium pyrithione with a zinc salt.

Abstract: Disclosed is a method for removing dissolved oxygen from a liquid (e.g., aqueous) system which comprisesadding to said liquid system an effective amount of an oxygen-scavenging chemical selected from 1,2-dihydro-1,2,4,5-tetrazines of the formula ##STR1## wherein R.sub.1 and R.sub.2 are individually selected from lower alkyl groups having 1 to 4 carbon atoms and phenyl.

Abstract: Improved liquid crystal compositions comprise a major portion by weight of at least three different p-alkoxybenzylidene-p'-aminophenylalkanoates and a minor portion by weight of p-methoxybenzylidene-p'-butylaniline and p-ethoxybenzylidene-p'-butylaniline. The compositions have broader nematic ranges than either ternary mixtures of the alkanoates or binary mixtures of the other two compounds. In addition, when certain dopants are added to the compositions, optimum improvement in properties is obtained using less dopant than that required by prior art compositions.