Other

Vasily Vladimirovich Korshak

Irina Alexandrovna Gribova

Svetlana Vasilievna Vinogradova

Alexandr Petrovich Krasnov

Vladimir Alexandrovich Sergeev

Mikhail Mikhailovich Teplyakov

Alla Markovna Berlin

Evgenia Semenovna Krongauz

Alexandr Vasilievich Vinogradov

Georgy Viktorovich Mamatsashvili

Galina Ilinichna Gureeva

Kira Alexandrovna Mager

Olga Vladimirovna Vinogradova

Vladimir Dmitrievich Vorobiev

Antonina Mikhailovna Polyakova

Anatoly B Davydov

Lev B Sokolov

Alla Y Akimova

Jury A Leikin

Ljudmila A Tikhonova

Volf Samoilovich Etlis

Alexandr Alexandrovich Vishnevsky

Vyacheslav Nikolaevich Semyantsev

Andrei Alexandrovich Askadsky

Abdulakh Kazbulatovich Mikitaev

Ivan Pavlovich Storozhuk

Georgy Vasilievich Elerdashvili

Alla Nikolaevna Chumaevskaya

Jury Sergeevich Kochergin

Grigory Lvovich Slonimsky

Leonid Sergeevich Zakharov

Nina Ivanovna Bekasova

Petr Maximilianovich Valetsky

Ljudmila Fedorovna Nebosenko

Yakov Semenovich Vygodsky

Nikolai Danilovich Zhuravlev

Ljudmila Grigorievna Komarova

Larisa Borisovna Shirokova

Raisa Alexeevna Dvorikova

Pelageya Nikolaevna Gribkova

Zinaida Vasilievna Geraschenko

Dali Mitrofanovna Kakauridze

Irina Sergeevna Mazaeva

Saga-Silviya Alexandrovna Pavlova

Irina Vladimirovna Vlasova

Nikolai Sergeevich Zabelnikov

Maria D Suchkova

Anatoly J Neronov

Natalia Monovna Kofman

Oleg V Kabanov

Anatoly V Ryabov

Valery Panteleimonovich Chebotarev

Nikolai Nikolaevich Trofimov

Vitaly D Gorchakov

Nikita G Evseev

Vitaly Rafailovich Belkin

Martin Izrailevich Kabachnik

An adhesive composition based on a monomeric ester of .alpha.-cyanacrylic acid and a modifying agent, viz. a monomeric fluorinated ether of dimethylvinylethynylcarbinol of the formula: ##STR1## wherein R is CH.sub.2 (CF.sub.2).sub.n H or CH.sub.2 (CF.sub.2).sub.n CF.sub.3 ; n=2 to 10. Owing to the addition of a monomeric fluorinated ether of dimethylvinylethynylcarbinol as a modifying agent into the adhesive composition, mechanical strength and water-resistant of the adhesive bond are improved. Thus, an ultimate shear strength of the adhesive bond produced from the adhesive composition according to the present invention after keeping in water for 10 days is equal to 119-185 kgf/cm.sup.2.

Adhesive composition

A method of preparing blood-compatible sorbents for recovering exo- and endogenic poisons which comprises sorption of the blood-serum albumin on an anion exchange resin, cation exchange resin, activated carbon or a styrene and divinylbenzene copolymer with a specific surface area of at least 20 m.sup.2 /g. Thereafter, the sorbed albumin is subjected to polycondensation at a temperature ranging from 10.degree. to 90.degree. C. The method according to the present invention practically does not change the initial porous structure of the sorbents, thus ensuring sorption of such compounds as bilirubin, uric acid, creatinine, barbituric acid derivatives, potassium and ammonium ions, phenols, indoles, skatoles.

Method of preparing blood-compatible sorbents for recovering exo- and

The present invention relates to novel compounds, viz. poly(arylate-sulphones) and to a method of preparing same. The compounds according to the present invention have the following formula: ##STR1## WHEREIN R is a carbon-to-carbon bond in para- or meta-position; ##STR2## n, m are indices denoting statistical distribution of structures over the macrochain; n and m are statistical values ranging from 1 to 10; x is a statistical value ranging from 1 to 100; y = 3 to 20; z = 5 to 20. The method of preparing said poly-(arylate-sulphones) comprises polycondensation of dichloroanhydrides of dicarboxylic acids with a mixture of bisphenol of the formula: ##STR3## and an oligosulphone of the formula: ##STR4## wherein y = 3 to 20; ##STR5## said oligosulphone being contained in the mixture in an amount ranging from 3 to 97% by weight as calculated for the desired poly(arylate-sulphone). The reaction is conducted in a medium of chlorinated hydrocarbons, followed by isolation of the desired product. The poly(arylate-sulphones) according to the present invention have a melt viscosity within the range of from 10.sup.3.8 to 10.sup.5.0 poises at a temperature of 330.degree. C and a shear stress of 10.sup.6 dn/cm.sup.2, which substantially facilitates their processing into articles by injection-molding or extrusion; they also feature a high heat-resistance as well as high thermal and mechanical characteristics. The method according to the present invention makes it possible to prepare poly(arylate-sulphones) on existing commercial plants producing polyarylates without any changes in the process scheme.

Poly/arylate-sulphones/and method of preparing same

The proposed composition contains from 5 to 98 parts by weight of polyphenylquinoxaline, from 1 to 94 parts by weight of an antifriction filler, from 0 to 40 parts by weight of a reinforcing filler, and from 0.1 to 10 parts by weight of a modifying dopant such as terephthalaldehyde, tetranitrile of pyromellitic acid, metal polyphosphinates or carborane-containing compounds. The antifriction material on the basis of said composition features a low and stable coefficient of friction and provides for the operation of dry-friction assemblies constructed therefrom at temperatures of up to 350.degree. C.

Composition for antifriction material

An antifriction polymer material which is a product of hardening of a composition consisting of a filler in amounts of 10-95 wt.% and a binder in amounts of 5-90 wt.%, a mixture of polyphenylenes being used as a binder containing ketal and/or acetyl groups of the general formula ##STR1## R.sub.3 and R.sub.4 being identical or different, the fraction with n =2-15 amounting to 4-20% of the binder weight. The proposed antifriction polymer material possesses high heat and thermal resistance of about 350.degree.C and 450.degree.C, respectively, which ensures a stable friction coefficient and a high wear resistance of the material at temperatures of up to 320.degree. C.

Antifriction polymer material

An antifriction self-lubricating material comprising fusible polyimides or polyphenylquinoxalines taken in a quantity of from 5 to 95 percent by weight of the antifriction material, and a filler of molybdenum disulphide modified with phosphorus-containing acids or phosphorus-containing esters, the phosphorus content in the modified molybdenum disulphide being within the range from 0.01 to 2 percent by weight, and the modified molybdenum disulphide being taken in a quantity of from 5 to 95 percent by weight of the antifriction material. The modified molybdenum disulphide employed as the filler imparts improved antifriction properties to the material.

Antifriction self-lubricating material

Polymers of the polyphenylene type comforming to the general formulas ##STR1## WHERE X is any number; ##STR2## WHERE N = 1-4 AND R is a simple bond; (CH.sub.2).sub.m with m = 1-20; CH=CH; C.tbd.C; CR.sub.1 R.sub.2 ; ##STR3## WITH P = 1-10, R.sub.1 and R.sub.2 standing for H, lower alkyls or phenyl; O; S; CO; ##STR4## WHERE R.sub.4 is H, Cl, Br, phenyl, ##STR5## with n, R, R.sub.1 and R.sub.2 as defined above. A method for producing said polymers of the polyphenylene type, which comprises polycyclocondensaton of diacetylbenzenes, diacetylnaphthalenes, diacetyl compounds of the general formula ##STR6## with n, R and R.sub.1 as defined above, triacetylbenzenes, 1,3,5-tri(acetylphenyl)benzenes or tri- or tetraacetyloligophenyls, or comprises copolycyclocondensation of the above-said acetyl-substituted aromatic compounds with methylarylketones of the general formula ##STR7## WHERE R.sub.4 is H, Cl, Br, phenyl, ##STR8## with n, R, R.sub.1 and R.sub.2 as defined above, or with monoacetylnaphthalenes in the presence of acid catalysts in a solution, melt or solid phase. The herein-proposed polymers of polyphenylene type feature high thermostability and heat-resistance, are chemically stable and have a number of other valuable properties.

Method of preparing polymers of polyphenylene type

Medical adhesive composition comprising the following components in preferably the indicated percents by weight:

Medical adhesive

An adhesive composition containing monomeric .alpha.-cyan acrylates - alkyl -.alpha.-cyan acrylates having from 1 to 7 carbon atoms, and/or allyl-.alpha.-cyan acrylate, as well as a modifying additive comprising fluorinated methacrylate or fluorinated acrylate of the general formula ##STR1## wherein n=1-3, R is H, CH.sub.3, or CH.sub.2 --C-- COOH.sub.2 (CF.sub.2)n.sub.1 CF.sub.3, wherein n.sub.1 =1-2 and R has the abovementioned significances. Monomeric .alpha.-cyan acrylates are used in an amount of 70-90 w.% and the modifying additive in an amount of 10-30 w.%. A strength of adhesive bond obtained using the adhesive compositions according to the invention attains 180-190 kp/cm.sup.2. The adhesive bond exhibits a considerable flexibility and hydrolytic stability.

A method of preparing polyimides by polycondensation of diamines and dianhydrides of tetracarboxylic acids in the presence of a catalyst, viz. a carboxylic acid such as acetic, benzoic, a tetracarboxylic acid taken in an amount of from 0.25 to 10, preferably from 0.8 to 2.5 COOH groups per one unit of a polyimide in a polar organic solvent medium which is inert with respect to the starting diamines and dianhydrides and immiscible with water at a temperature within the range of from 100.degree. to 220.degree. C.

Method of preparing polyimides

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Moscow, Russia

Vasily Vladimirovich Korshak