| 摘要 |
Titanium chelate compounds of the general formula: (RO)xTi(R1)4-x where x=0, 1, 2 or 3 and R is an alkyl or aryl radical, e.g. ethyl, n- or iso-propyl, n, iso, sec. or tert. butyl, 2-ethylhexyl or phenyl, and R1 is an oxy-compound capable of chelating with titanium, e.g. dihydroxy, diketo, hydroxy keto compounds, hydroxy carboxylic acids and their esters and keto carboxylic acids and their esters may be made by mixing one mole of a titanium ester e.g. tetraisopropyl titanate or tetraisobutyl titanate with 1, 2, 3 or 4 moles of the appropriate oxy-compound and removing the liberated alcohol. In examples, ethyl acetoacetate titanate is made (Example 3) by mixing one mole of tetraisopropyl titanate with two moles of ethyl acetoacetate and distilling off the liberated isopropanol in vacuo, or (Example 4) by mixing one mole of tetraisopropyl titanate with four moles ethyl acetoacetate, four moles of isopropanol then being distilled off. Acetyl acetone titanate is made (Example 6) by mixing one mole of tetrabutyl titanate with two moles of acetyl acetone. Similar methods may be used for the preparation of diacetone alcohol titanate and octylene glycol titanate.ALSO:A cigarette filter is made from a tow of 18,000 cellulose acetate filaments each of 0.8 denier, which is crimped to 20 crimps per inch, spread out to a width of two feet and sprayed with glycerol triacetate plasticizer to an increase in weight of 12%. The tow is then compacted into a cord and processed into filter rods in conventional manner. Cigarette filters 15 mm. in length are made from the rods and attached to cigarettes, which are smoked on a standard cigarette smoking machine. Analysis of the smoke yields only one half the tar and nicotine content found in the smoke from the same cigarettes without the filter. The filaments comprising the filter are made from a cellulose acetate spinning solution, containing preferably 15-23% cellulose acetate, the viscosity of which has been increased by dissolving therein a small proportion of a titanium chelate compound. For details see Division B5 abridgment.
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