of dry benzene was added and heating continued at 90 C. The viscous solution thus obtained Was diluted with 50 cc. dry benzene, and the polymer precipitated as white fibers by the addition of dry n-hexane.
We take no responsibility for the content on any web site which we link to, please use your own discretion whereas surfing the hyperlinks. The course of as in claim 6 during which the isocyanato compound is toluene-2,four-diisocyanate and the triorganosilyl amine is N,N-bis piperazine. The process as in declare 6 during XNXZ which the isocyanato compound is toluene diisocyanate and the triorganosilyl amine is N,N’-bis-p-phenylenediamine. The process as in claim 6 in which the isocyanato compound is para-phenylene diisocyanate and the triorganosilyl amine is N,N’-bis -p-phenylenediamine. The course of as in claim 6 during which the isocyanato compound is toluene-2,4-diisocyanate and the triorganosilyl amine is N,N’-bis-p,p-diaminodiphenyl ether.
Included amongst such compositions used as starting materials are these having triorganosilyl piperazine substitutions by which all methyl teams are substituted by either all ethyl teams or by all phenyl groups. Example 8 To illustrate the importance of the silyl substitution on the natural diamine, toluene-2,4-diisocyanate was reacted with para-phenylene diamine in the identical manner as was described in Example 7. For solubility causes, this reaction was carried out whereas the ingredients have been dissolved in N-methyl pyrrolidone.
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The options additionally could also be used to spin fibers of the polysilylurea by way of spinnerettes and volatilizing the solvent. Polysilylureas of Formula IV have molecular weights starting from one thousand to 500,000 or more. Depending on the substituents which R, R and Z, and m represent, a lot of such polymers will have softening factors of around C.
- It is crucial that there be no substitution on the R group of reactive teams, similar to an amine, a hyn ‘5 droxy, a carboxy, or related reactive atoms or group.
- Films therefrom had a tensile of about 5845 p.s.i.
- Among compositions which the diisocyanates of Formula I may be are, for example, ethylene diisocyanate, butylene diisocyanate, pentamethylene diisocyanate, phenylene diisocyanate, toluene diisocyanate, naphthalene diisocyanate, (the place the isocyanato teams could also be alpha or beta-substituted on the identical or totally different aryl rings of the naphthalene nucleus) xylene diisocyanate; p,p-diisocyanato diphenyloxide; para,para-diisocyanato diphenylmethane, and so forth.
- Example 7 In this instance, N,N-bis-p-phenylene diamine was reacted with toluene diisocyanate in the same manner as was accomplished in Example 6, and the polymer thereby obtained was isolated in the method to offer a stable product composed of recurring items of formulation This polymer was soluble in benzene, toluene, dioxane, and tetrahydrofuran.
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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 policy against any illegal pornography. All hyperlinks, videos and images are offered by third parties. We don’t have any control over the content material of those 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 a solution of the desired polysilylurea which may be precipitated from the solvent by the addition of a non-solvent for the polysilylurea, such as n-hexane.
(Cl. ) This invention is anxious with polysilylureas, their preparation, their conversion to polyureas, and intermediates used to make these polysilylureas. More particularly the invention relates to a course of for making polysilylureas which contains effecting reaction between a diisocyanate of the method OCNRNCO with a triorganosilylamine of the formulation R3 S iN Z-N S iR Rllm R!!! the place R is a divalent organic 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 organic radicals terminated by two nitrogen atoms with Z being a divalent natural moiety, and alicyclic radicals during which Z with the 2 nitrogens types a cyclic diamine construction, and m is a whole quantity from zero to 1, in being zero only when the aforesaid grouping is alicyclic. The invention also contains polysilylureas of the formula (IV o o e m tr 81B; R”,,, R”m SiRa x the place R, R, R”, Z and m have the meanings above and x is a whole quantity in extra of l, for instance from to 10,000 or more and as excessive as a hundred,000 or greater; and the conversion of those polysilylureas to polyureas of the formulation IiI R”m R” m H the place again R, R”, Z, In and x have the meanings given above, the said polyureas being shaped by the hydrolysis of the polysilylurea to remove the -SiR teams to type the polyureas and disiloxanes of the formulation R’ OSiR’ where R has the which means given above.
In maleing the triorganosilyl amines of Formula II, a molar ratio of at least 2 and up to 6 or more mols of the trihydrocarbon substituted hydrolyzable silane of. The triorganohydrolyzable silane, corresponding to, trimethylchlorosilane, is added to the diamino compound, within the presence of a hydrohalide acceptor corresponding to, pyridine, triethylamine, etc. or some other tertiary amine usually leads to an exothermic reaction with the temperature rising as high as 4070 C. The combination of components is advantageously stirred for a period of from about one half to 2 hours and thereafter heated on the reflux temperature of the mass for an extra interval of quarter-hour to 1 hour and the hydrohalide of the hydrohalide acceptor is then filtered off and the response product thereafter fractionally distilled to obtain the specified triorganosilyl amine of Formula II.
It should be acknowledged that each the polysilylureas and the polyureas derived therefrom will undoubtedly have a terminal group. Although I do not want to be certain by this understanding, nonetheless, it’s believed that no less than one of many terminal groups, whether or not it be a polysilylurea chain or a polyurea chain, is of the formula Where one valence of the nitrogen is attached to the urea chain while the opposite valence of the nitrogen is happy by either a triorganosilyl group or a hydrogen atom, relying on whether or not one is dealing with a polysilylurea or a polyurea.
intercourse video downloadxxnxxxxxnxbfsexy bfxxxnxnxxnxxxxxx video downloadxxn#bay-dream , #soapy-sex , #step-dad-sex , #legends , #bunk , #xxx 3gp video obtain , #Vixen , #Jammu Kashmir intercourse video , #xxx hindi discuss , #xfoxxx , #Dasi intercourse video HD , #desi Bengali BF , #Xxx rape vidoe , #authorized xxx , #japani housebife pressured black cock , #canine and girls sex videos , #xnxx canine sex , #Xxx video of bangladesh , #massive ass fucked in saree , #indai intercourse hd , #Porns movies japanese , #افلام سكس.com , #fats big girl intercourse vido , #amateur perv , #chauffeurs part 2 , #dede , #obedient , #horny video BP attractive video , #angrejo ki xxx sothe huva , #latest sex movies ,Copyright © It was noted that when the silyl substituents on the polysilylurea are trimethylsilyl groups, the ensuing silanol is sufiiciently unstable to evaporate as quick as it’s fashioned. After hydrolysis the polymersare insoluble in non-polar solvents and solely solvents like N-methyl pyrrolidone, dimethyl formamide and diinethylsulfoxide will dissolve the polyureas obtained.
Such fillers could also be added in quantities ranging, by weight, from zero.1 to 200 elements of filler per elements of polymer. Suitable plasticizers could also be added as might extenders of resins, for instance, cumar, indene, and cumarindene resins. These polyureas have good warmth stability, are infusible, and insoluble in all and to widespread organic 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, adding 220 grams trimethylchlorosilane, and heating the mixture of elements in the same manner as in Example 1. This will yield a composition having the formulation Example 11 as evidenced by the analyses; p.c C, sixty six.5 (sixty six.3); % H, 8.9 (eight.9); p.c N, 8.5 (8.three); percent Si, sixteen.8 (16.6).