Other

Mikhail Mikhailovich Teplyakov

Vasily Vladimirovich Korshak

Vladimir Alexandrovich Sergeev

Irina Alexandrovna Gribova

Alexandr Petrovich Krasnov

Galina Ilinichna Gureeva

Georgy Vasilievich Elerdashvili

Valery Panteleimonovich Chebotarev

Raisa Alexeevna Dvorikova

Dali Mitrofanovna Kakauridze

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

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

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Moscow, Russia

Mikhail Mikhailovich Teplyakov