Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Medical adhesive composition comprising the following components in preferably the indicated percents by weight:2-ethoxyethyl-.alpha. -cyanoacrylate . . . 84.9-96.98Polyvinyl-n-butyl ether having the general formula, ##STR1## WHEREIN N IS A NUMBER SUFFICIENT TO PROVIDE A MOLECULAR WEIGHT OF ABOUT 4,000 TO 10,000 . . . 3-15And as a fat-soluble, green stain or dye, 1,4-bis-(p-toluidino)-anthraquinone having the formula, ##STR2## The adhesive is useful for joining soft tissues in surgical operations.

Abstract: 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.

Abstract: 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.