SU1552613A1 - Rubber mixture for producing sealing material - Google Patents

Description

one

(46) 08/07/92. Bul Number 29

(21) 4397815/05

(22) 03/28/88

(72) I.A. Sosnina, G.V. Poroshin, N.I. Voskresensk and L.V. Kropushkina

(53) 678.7 (088.8)

(56) Author's sviletelstvo USSR №1338367, cl. C 08 L 27/12, 1985, 37-92.

(54) RUBBER MIXTURE FOR THE PRODUCTION OF EXPRESSIVE MATERIAL

(57) The invention relates to the production of paronite-type gasketing materials used to seal fixed flange joints working in contact with organic

solvents, oils and acids at high temperatures. The invention allows to increase the strength of the material in the longitudinal direction up to 50 MPa, in the transverse direction up to 25 MPa, as well as the heat resistance of the material in terms of strength after exposure to air at 150 ° C. To do this, in the formulation of the composition, including, May .: a copolymer of vinylidene fluoride and hexafluoropropylene, a vulcanizing agent 0.4-1.0 magnesium oxide 1-2 and asbestos 38.9-66.50 entered iron oxide and aluminum oxide 28-38, 3 tab.

The invention relates to the production of paronite type cushioning materials used to seal stationary flange joints, working in contact with organic solvents, oils and acids at high temperatures.

The aim of the invention is to increase the strength and heat resistance of the material.

Paronite is made, solution, rubber in ethyl acetate (ethyl acetate) and mixed with it (see Table 1) with the rest of the ingredients. The mixture is molded on a paronite roller and vulcanized. Paronitupup mix is made in the horizontal mixer with 2-shaped rotors on glue technology.

All compositions are made according to the above mode.

Paronit mixture is formed on a paronit mill. The mixture is layered on a hot roll; by raising the upper cold press roll, a gradual increase in the sheet thickness occurs. The upper roll is raised at a speed of 0.035-0.054 mm per turn of the hot roll; Rolling is continued until the sheet has the required thickness. The temperature of the hot roll is 70-80 ° C, so the solvent evaporates during the layering. The duration of rolling mines depending on the thickness of the sheet. Paronite is vulcanized at 150–160 ° C for 4–8 min in a hydraulic press or continuous vulcanizer.

Data on the composition of the compositions and material properties are presented in table. 2, 3.

SP

Claims (1)

Invention Formula T and b and R.zhim mix c a 1 physical and fur characteristics of the material Conventional tensile strength under normal conditions, NPA: transverse direction18 in the longitudinal direction 36 Factor eta rn strength after exposure to air at 150 C and the current 6h0, 12h0.67 r4 cho, h7 72 cho, go Compressibility at a pressure of 35 Le after exposure to air at 350 ° C for 16.16 hours, 72 hours, 12 Recoverability after relieving pressure 35 refinery after exposure to air at 35 UeC for 24 minutes. ID 43 72 hours i 37 Weight loss of the sample after exposure to concentrated sulfuric acid under normal conditions in those 17 13 14IS 2J 25 g 24 32 36 3338 32 15 50 47 5 0.8 0.7 0.5 0.3 37 28 O, / 5 0.6 O, 0.1 0.75 0.65 0.5 0.2 0.80 0.7 0.6 0.35 0.79 0.7 0.6 0.35 7 6 0.78 0.7 0.6 0.3 0.76 0.6 O.S 0.25 1.2 1.18 MS 1.05 12 14 1.15 1.08 1.05 1.0. ten 12 1.191, 1.051, 1,051, 0.99, 10 12 38 2S 37 27 34 2b 37 26 37 21 | 38 27 And "3 46 45 44 41 8 and 45 45 Table 3 , / 5, 6,, 1 0.75 0.65 0.5 0.2 0.80 0.7 0.6 0.35 0.79 0.7 0.6 0.35 0.78 0.7 0.6 0.3 0.76 0.6 O.S 0.25 1.2 1.18 MS 1.05 1.15 1.08 1.05 1.0. 1.191.1v 1.051.15 1,051.1 0.99.05 12 14 ten 12 10 12 8 and 7 34 2b 37 26 37 21 | 38 27 And "3 46 45 44 41 45 45