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Nauchno-proizvodstvennoe Obiedinenie 'norplast'

Anatoly I Nepomnyaschy

Nikolai S Enikolopov

Valentin P Krasnokutsky

Mikhail G Brusilovsky

Susanna M Karpacheva

Semen F Sholk

Viktor A Pekarsky

Khristofor A Markarian

Arkady L Iljushin

Elena L Akopian

Suleiman K Matkarimov

Tatyana A Pekarskaya

Svetlana A Gavrilina

Vilitary B Pavlov

Leonid I Kurakin

Mikhail A Markevich

Pavel P Sherstnev

Saibdzhan S Negmatov

Valeryan M Muratov

Yury A Polivanov

Naum D Lerman

Lidia P Khorkhorina

Oleg K Maimur

Lidia A Filmakova

There is provided a method wherein the source material, rubber or vulcanization products is pulverized in an extruder wherein it is first compressed by a force of 0.2 to 0.7 MPa, then subjected simultaneously to a pressure ranging from 0.2 to 50 MPa and a shear force ranging from 0.03 to 5 N/mm.sup.2 while heating the material to a temperature ranging from 80.degree. to 250.degree. C. and then cooling said material to a temperature ranging from 15.degree. to 60.degree. C. The source materials can be used rubber goods, such as used tires and rejects of tire industry, footwear and industrial rubber production.

Method of making powder from rubber and vulcanization products

A process for preparing epoxy resin comprises a step of allowing a mixture of epichlorohydrin, 2,2-bis(p-hydroxyphenyl)propane, and a solvent in the presence of an alkali used in an amount of from 0.4 to 5% by weight of the epichlorohydrin to stay at a temperature of from 45.degree. to 70.degree. C. to obtain a homogeneous mass. Subsequently an alkali used in an amount of from 45 to 50% by weight of the epichlorohydrin is added to the resultant mass, and polycondensation is conducted at a temperature of 70.degree. to 90.degree. C. under stirring to obtain the end product.

Process for preparing epoxy resin

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Anatoly I Nepomnyaschy