SU1300025A1 - Butadiene-nitrile rubber-base stock - Google Patents

Abstract

The invention relates to rubber compounds based on butadiene nitrile rubbers. The invention allows to increase the tensile strength up to 7 MPa and fatigue endurance of rubber (resistance to dynamic loads up to 260 thousand cycles) due to use in a rubber mixture containing, w.ch .: nitrile 100, sulfur from 1.5 to 8 , 0, alt-tax from 1.5 to 2.0, zinc oxide from 4 to 8, stearic acid from 1 to 2, epoxy resin of Dianova from 4 to 8, canine residue produced by cij-aminophenylacetic acid as a modifier in quantity from 5 to 10 ma.ch. The modifier is pre-ground in a ball mill and injected into the rubber mixture prior to the introduction of the vulcanizing group. 2 tabl (L

Description

The invention relates to the rubber industry and concerns the development of a rubber compound formulation based on butadiene nitrile rubber, which has an improved processability and can be used to obtain vulcanizers with increased indicative tensile strength and anti-aging properties.

The purpose of the invention is to increase the tear resistance and the dynamic load resistance of rubber.

Rubber mixtures based on butadiene nitrile1 rubber are prepared on Laboratory Rollers. The AFAC resin is pre-ground in a ball mill and introduced into the rubber compounds prior to the introduction of the vulcanizing group. Recipe rubber mixtures are given in table. one

Recipes 1-7 reflect the essence of the technical solution and at the same time characterize the qualitative and quantitative ratio of the components of the modifying additive. Recipes 8-15 relate to the dosage of sulfur, altaxin zinc oxide and stearin on the properties of vulcanizers with the specified ratio of ingredients used. Recipe 16 describes the basic object recipe 17 prototype.

Vulcanizing mixtures in an electric press at 150 ° C for 60 minutes.

Claims (2)

Physico-mechanical properties of the obtained vulcanizers are given in table. 2. The formula of the invention Rubber mixture based on butadiene nitrile rubber, including sulfur altax, zinc oxide, stearic acid and a modifier, characterized in that, in order to increase the breaking strength and resistance to dynamic loads of the obtained rubber, the rubber mixture as a modifier contains the bottoms residue of the production of α-aminophene.polux acid based on oligomer general formula HE Q 4-9H-C-N-C - N -) - And I And H where n 5-30, moreover, the content of the oligomer with is 10-15%, with a value of 10-20 is 25-30%, and with a value of 20-30 is 55-65%, and epoxy resin Diano in the following ratio of components, wt.h .: 0 five 0 Butadiene nitrile rubber Sulfur Altax Zinc Oxide Stearic Acid Vat residue production of α-aminophenyl acetic acid Epoxy-Dianova resin 100 1.5-8.0 1.5-2.0 4.0-8.0 1.0-2.0 5.0-10.0 4.0-8.0 Yamsaitevi 13000256 Twistlit Recipe ) I 2 1 3 Г 4 Is TT Т; IB t "t 1OT pT | 2 T7z L 1 16 T 17 in 19 According to the i j coitre co t oit contact | I KOHTjKOHTjKOHTJKOHTjKOHTJ 1kt sont, Pdvulka iaapn by t ytm at (ZO S, Tj. min 2A 25 23 25 18 21 15 20 16 28 12 30 23 30 24 20 12 22 24 21 Panne Hall take down pa rolls calender (- sleep, - - not sticks) ---------------- + --Conditioned to read when stretched, MPa 6.7 6.3 5.9 3.2 7.0 4.18.2 6, 9 7.34.0 6.5 3.8 6.5 3.56.2 2.5 4.86.8 6.5 6.6 Relate-1 body extension at rave Shmlrv 410 420 jeO 520 250 530 720 300 280 650 410 700 400 680 430 550 260 320 440 370 Against dynamic izagruzkan ths cycles 250 260 230 220 220 80 210 70 110 60 120 250 140 130 130 260 110 80 160 250 190 Hardness PS Shora A, unit 55 58 60 51 70 58 75 65 75 54 59 55 60 52 57 .50 56 62 56 0 Note. Recipes 4-7, Yu-Ts, 16, 17 control.