Patent Number: 8,822,579

Title: Frost-resistant rubber based on propyleneoxide rubber and natural bentonites

Abstract: A rubber compound based on propylene-oxide rubber SKPO, including sulfur, stearic acid, zinc oxide, thiuram disulphide, carbon black P-803. The compound is characterized by replacement of 2-mercaptobenzothiazole (kaptax), as well as fluoroplastic F-4, with dibenzothiazyl disulfide (altax), phenyl-.beta.-naphthylamine (neozone D), dibutoxyethyl adipate, and natural bentonites. Use of a rubber compound with the proposed composition increases the service life of rubber seals during their operation in sealing devices, due to higher frost resistance and a lower residual compressive strain value. Also, the compound can be manufactured by a simpler method compared to modern production technology, eliminating the stage of joint mechanical activation of zeolite and dibutyl phthalate.

Inventors: Petrova; Nataliya Nikolaevna (Yakutsk, RU), Portnyagina; Viktoriya Vitalievna (Yakutsk, RU)

Assignee: North-Eastern Federal University

International Classification: C08K 13/02 (20060101)

Expiration Date: 9/02/12018