| 摘要 |
1325115 Resin compositions TALLINSKY POLITEKHNICHESKY INSTITUT 23 Dec 1971 60042/71 Headings C3R and C3T A stencil-print colour composition comprises 100 p.b.w. of a varnish selected from a linseed oil varnish which is essentially polymerized linseed oil, a pentaphthalic varnish which is essentially polypentaerythritol-phthalate modified by linseed, tung or castor oil, and which is dissolved in said oil, a glyptal varnish, which is essentially polyglycerol-phthalte by linseed, tung or castor coil, and which is dissolved in said oil or a mixture of said varnishes, 75-125 p.b.w. of a phenol-HCHO resin or a phenol- HCHO resin modified with colophony, 2-25 p.b.w. of metal salts of carboxylic acids having more than 6 carbon atoms; 5-120 p.b.w. of organic and/or inorganic pigments; 1-20 p.b.w. of a polymethylspirocyclosiloxane of the formula where n = 2-7, and 75-175 p.b.w. of an organic solvent, the p.b.w. specified being the preferred amount of each component. Suitable metal salts include the resinates, linoleates and naphthenates of Ca, Mn, Pb, Co, Al and suitable solvents include toluene, ethyl- and butylacetate, cyclohexanone, ethylene glycol monoethyl (and monobutyl) ether. The composition may additionally contain tetrahydronaphthalene, decahydronaphthalene, methyl-cyclohexanol or mixtures thereof in an amount of 1-10 p.b.w. per 100 p.b.w. of varnishes used, or it may contain a pentaphthalic varnish additive which is essentially polypentaerythritol-phthalate modified by linseed oil and dissolved in the oil in an amount of 5-50 p.b.w. per 100 p.b.w. of the varnishes. A filler, which is aluminium hydroxide alone or in a mixture with barium sulphate, may also be added in an amount of 1-50 p.b.w. per 100 p.b.w. of the varnishes. A pentaphthalic varnish used in the compositions of the examples is prepared by first heating a mixture of linseed oil and pentaerythritol in the presence of lead oxide, and then adding phthalic anhydride, triphenyl phosphite and xylene and heating further. The diphenylolpropane-HCHO resin modified by colophony used in the compositions is prepared by first reacting diphenylolpropane, paraform and HCHO in the presence of Ca(OH) 2 , then adding colophony, free from terpenes, to the mixture and heating. Glycerol is then added and the mixture heated further. The resin formed has the structure Uses.-Stencil-print colours for printing on polymer materials, glass, metal and regenerated cellulose.
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