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of dry benzene was added and heating continued at ninety C. The viscous resolution thus obtained Was diluted with 50 cc. dry benzene, and the polymer precipitated as white fibers by the addition of dry n-hexane.

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Included among such compositions used as starting materials are those having triorganosilyl piperazine substitutions in which all methyl teams are substituted by either all ethyl groups or by all phenyl groups. Example eight To illustrate the significance of the silyl substitution on the natural diamine, toluene-2,four-diisocyanate was reacted with para-phenylene diamine in the same manner as was described in Example 7. For solubility causes, this response was carried out whereas the ingredients were dissolved in N-methyl pyrrolidone.

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Thus, one is ready to make use of basically all the atoms within the polysilylurea in the formation of helpful polyureas. It will in fact be obvious to these skilled in the art that in addition to the situations or intermediate elements which had been employed above for making the polysilylureas and the polyureas, other circumstances and components may be employed with out departing from the scope of the invention.

• This will yield a composition having the formulation Example 11 as evidenced by the analyses; % C, sixty six.5 (sixty six.3); % H, eight.9 (8.9); percent N, 8.5 (eight.three); p.c Si, sixteen.8 (16.6).
• Depending on the substituents which R, R and Z, and m represent, lots of such polymers will have softening factors of round C.
• Polysilylureas of Formula IV have molecular weights ranging from one thousand to 500,000 or extra.
• The solutions also could also be used to spin fibers of the polysilylurea by way of spinnerettes and volatilizing the solvent.

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R may be hydrogen or a monovalent hydrocarbon radical the same as those recited for R. Disclaimer — We have zero tolerance coverage towards any illegal pornography. All links, videos and pictures are offered by third parties. We don’t have any control over the content material of these websites.

In order to form the polysilylurea, the diisocyanate is then reacted with the triorganosilylamine of Formula II employing a molar ratio of about 1 mol of the triorganosilylamine per mol of the diisocyanate. There is thus obtained an answer of the specified polysilylurea which could be precipitated from the solvent by the addition of a non-solvent for the polysilylurea, such as n-hexane.

(Cl. ) This invention is worried with polysilylureas, their preparation, their conversion to polyureas, and intermediates used to make these polysilylureas. More significantly the invention relates to a process for making polysilylureas which contains effecting reaction between a diisocyanate of the formulation OCNRNCO with a triorganosilylamine of the formula R3 S iN Z-N S iR Rllm R!!! where R is a divalent natural radical, R is a monovalent hydrocarbon radical, R is a member selected from the category consisting of hydrogen and monovalent hydrocarbon radicals, and the grouping lTIZ-1TT- (R /I)m (RI/)m is a divalent organic radical selected from the class consisting of natural radicals terminated by two nitrogen atoms with Z being a divalent natural moiety, and alicyclic radicals in which Z with the 2 nitrogens types a cyclic diamine construction, and m is a whole quantity from 0 to 1, in being zero only when the aforesaid grouping is alicyclic. The invention additionally contains polysilylureas of the formulation (IV o o e m tr 81B; R»,,, R»m SiRa x where R, R, R», Z and m have the meanings above and x is a whole number in excess of l, as an example from to 10,000 or extra and as high as 100,000 or greater; and the conversion of those polysilylureas to polyureas of the formulation IiI R»m R» m H where once more R, R», Z, In and x have the meanings given above, the mentioned polyureas being formed by the hydrolysis of the polysilylurea to take away the -SiR teams to type the polyureas and disiloxanes of the method R’ OSiR’ the place R has the which means given above.

These movies had a tensile strength of about 6485 p.s.i. Exposure of the polysilylurea to moist air gave a strong polyurea of recurring models of the formulation This polyurea, which might be heated at temperatures up to nearly 260 C. earlier than any proof of decomposition, was resistant to most solvents, though soluble in such solvents as dimethyl formamide. Films and fibers were useful as electrical insulation and for high temperature cloths, respectively, could be solid or spun from options of this polyurea in dimethyl formamide. By utilizing the diamine because the hydrolyzing agent, it is transformed immediately into a disilyl diamine which can then be used to make additional polysilylureas by reaction with the suitable diisocyanate. In addition, when Z with the 2 nitrogens in a cyclic natural radical containing the nitrogen in the ring structure such groupings could be, for example, the piperazyl radical of the formulation where R is a monovalent hydrocarbon radical corresponding to these recited for R , and p is a whole quantity from to 4, inclusive.

This polymer when dried under vacuum underneath anhydrous situations, was a polysilylurea composed of recurring units of the formula. The formation of the polyurea containing fewer silyl groups than the beginning polysilylurea, or a polyurea completely free of silyl groups, could be achieved by exposing the polysilylurea to air, preferably of from 70 to relative humidity. This results hydrolysis of the triorganosilyl teams to kind the corresponding disiloxane with the substitution of a hydrogen atom instead of the triorganosilyl group on a nitrogen atom. Where the polysilylurea is pretty thick in cross-part, the scission of the triorganosilyl teams by hydrolysis is more rapid on the floor than within the matrix of the polysilylurea article.

Washing the options of the polys’ilylurea with Water will elTect primarily complete removal of the triorganosilyl teams. After hydrolysis with the moisture or water-containing environment, the disiloxane is removed from the polyurea by washing with suitable solvents or by heating at temperatures high enough to volatilize the disiloxane.

Such fillers may be added in amounts ranging, by weight, from 0.1 to 200 parts of filler per parts of polymer. Suitable plasticizers may be added as may extenders of resins, for instance, cumar, indene, and cumarindene resins. These polyureas have good heat stability, are infusible, and insoluble in all and to common natural solvents. Example 10 The compound N,N-bis-p,p-diaminodiphenyl is ready by forming a suspension of 184 grams of p,p’-diaminodiphenyl in 1.5 liters of dry benzene with 250 grams triethylamine, including 220 grams trimethylchlorosilane, and heating the mixture of elements in the identical method as in Example 1. This will yield a composition having the method Example 11 as evidenced by the analyses; p.c C, 66.5 (sixty six.3); percent H, 8.9 (eight.9); % N, eight.5 (eight.three); % Si, 16.eight (sixteen.6).