DEP0023154DA - Immersion liquid - Google Patents

Description

Professor Dr * Otto Bayer and Sr. Ernst Gauer “Leverkusen

Sh / Seh Leverkusen) the 29ο November 19 ^Ä 8

Emulsion liquid

For the purpose of microscopy, to increase the resolving power, when using high magnifications, the cover glass of the object and ob; jekiivlinae a SwisohentBchiölitj which also prevents the disruptive total reflection. Liquids, which are used for these sweeks as a swisoh layer * they must have a number of essential properties. The refractive index must be matched to that of the glass of the lenses and be XUj a "I ₉ 515. The difference in the refractive indices at different wavelengths of the light must be small corrected now so _s "Sass © with a Apart SSHL (reciprocal relative Ifisperslon) of 5Oj as corresponds äem Oedernholsjöl" working "that Ismer" * sion oil the usual Linssnkitte must not attack must be easily removable with Bensin, a low © viscosity Aufwaiseftj optically clear xm. colorless aeirx ₉ at low tem peretur doesn’t crystallize and is practically non-volatile. These requirements largely met so-called Ceäernholsöl * This oil but has the Haohteil ₈ calibrated on Ideht ₉ but besonöera öeis under influence of heat tsnö oxygen su thicken ₉ h d _e. isu pause *

Attempts have therefore _f öaa 0eäernholsi51 ssu ersetJ5en _f Sun Sun B * including through RioinusöX »anisole All these substances have öen laohteilp äaß either the Broohungsindex or dispersants =" sioii not <AEEN desired value cowardly "When anisole außerdam interfere flüohtigkeit vsnü low viscosity *,

It has now become a fully-fledged ersata for Ced6rnholgöl _e which also has the disadvantages of Cedsmholsles.niefet _P in üezi more highly chlorinated all-phhe- tical hydrocarbons

Is A 61

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Claims (1)

found "to be suitable aliphatisohe hydrocarbon" have materials of predominantly straight chain Hatur proved how si © incurred-Tropsoh synthesis Pischer in aer so-called. Their carbon "atomic number should be more than δ" if possible, a fraction from C ₁ ^ to G ^ _{Q has} proven to be particularly favorable, as it is available under the trade mark "Kogaain II ^CS ο the degree of chlorination mxB see 47 $> and 55 $ * are at best has proven eioh a chlorinated Kogasin 52 # chlorine, Itarah pale of moles "@ r3Se the above-asgangs-Kohlenwasasrstoff s you have, except it in your hand, the viscosity of the final product. change * Me chlorinated hydrocarbons, which are obtained from olefin-free or olefin-containing fractions by chlorination in the light under möglichstem exclusion of metal provide clear ₉ .farblose ,, Tiskose liquids _r represents the "at a chlorinating" the degree τοπ about 52 $>& s desired refractive index of have 1,515. the dispersion is slightly lower than in Oederahols "ÖLG therefore better for the purpose of use with!" insensjste · "men _s the äesa Cederahoisöl are _adapted? dispersion can be easily ei'höht on aean desired value? by low © amounts (1 - 3 $>) of chlorinated aromatic YerMndimgen SIIG © - "SetAt weräen" Torteilhaft are crystallising chlorination "rungagemische of biphenyl with a Brechungsindez at least I ₅ 515ο For two weeks of prolonged storage under the influence of heat or other external influences, it is advantageous to use very small amounts of known stabilizers, s, B, aliphatic or aromatic tsyleaoxyöäerlvaten, in addition to the new injection fluids, which has a susceptibility of 1 $ > Phenosypropylenoxyä proven « If estrsiE low dispersion is desired, an addition of aliphatic epoxyctene is required * higher chlorinated sliphate »predominantly higher hydrocarbons with a chlorine content between 47 and 55 ί> than immersion liquid for optical