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Sulphur-containing organosilicon cpds - useful as adhesion promoters in silica-reinforced fubbers and water-repellent cpd inters
Sulphur-containing organosilicon cpds - useful as adhesion promoters in silica-reinforced fubbers and water-repellent cpd inters
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机译:含硫的有机硅cpds-用作二氧化硅增强的毛坯和防水cpd内衬中的粘合促进剂
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摘要
Sulphur-contg. organosilicon cpds. Z-Alk-Sn-Alk-Z (I) (where Z =Si(R1)(R1)(R2) - Si(R1)(R2)(R2) or -Si(R2)(R2)(R2), R1 = 1-4C alkyl or phenyl, R2 = 1-8C (esp. 1-4C) alkyl or 5-8C cycloalkyl or 1-8C straight or branched alkylmercapto gp. Alk = opt. unsatd. straight or branched opt. cyclic 1-18C (esp. 1-6C or pref. 2 or 3C) hydrocarbon gp. and n = 2-6) are prepd. by reacting 2 mols. of a cpd. Z-alk-Hal where Hal = Cl, Br or I with 1 mol. of a cpd. Me2Sn in which Me = ammonium or metal atom, esp. alkali metal such as Na, pref. in an org. solvent such as acetone or an alcohol, at elevated temps. followed by filtering off the metal halide formed and distillation of the solvent under reduced pressure to leave the (I) as residue.
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