RU1770328C - Fire-resistant rubber mixture - Google Patents

Abstract

Usage: the manufacture of fire-resistant conveyor belts. SUMMARY OF THE INVENTION: The rubber composition comprises, h: synthetic cis-isoprene rubber 70; styrene butadiene rubber 30; sulfur 2-4; Y-cyclohexyl-2-benzthiazolylsulfanamide 1-3; 2,21-dibenzothiazole disulfide 1-2; zinc oxide 0.5-1.5; carbon black (with a specific geometric surface of 75-82 m2 / g) 10-30; kaolin 30-40; white soot (with a specific surface area of 75-100 m / g) 10-15; antimony trioxide 4-6; chloroparaffin (with bound chlorine content of 45-49%) 15-25; chloroparaffin (with a bound chlorine content of 68-72%) 15-25; indencumarone resin 9-13; synthetic fatty acid monoethanolamides (do-Cie fractions) 0.5-1.5; synthetic fatty acids (fractions C21-C25) 2-3; 2,2,4-trmmethyl-1,2-dihydroquinoline 1-2 polymer; modifying additive 2-3. As a modifying additive, the bottom residue is used to produce the dye of bright green-green C based on the resinous compounds of a polycyclic structure — the condensation products of the derivatives of violantrone and chlorophenols. The bond strength of rubber with the TK-200 synthetic fabric is 5.2-6.7 kN / m. Relative tensile strength of rubber is 11.8-12.6 MPa, elongation at break of 680-750%, fire resistance of rubber is 1.9-2.2. 2 tab. (L C x & VS o so u 00

Description

The invention relates to the rubber industry, in particular to the development of a mixture based on unsaturated rubbers, and can be used in the production of flame-retardant conveyor belts.

Known vulcanizable rubber mixture based on unsaturated rubber, including as modifying

additives modifier RU-1. which is an equimolecular compound of resorcinol and urotropin. However, rubbers from this mixture are characterized by insufficient bond strength with textile polyamide cord.

Also known is a vulcanizable rubber mixture based on unsaturated rubber, including resin SF-281 - product

condensation of the alkylresorcinol fraction with formaldehyde. The rubbers from this mixture also have insufficient bond strength with the textile tulimide material.

A rubber mixture based on unsaturated rubber is known which contains, as a modifier, a propylene oxide oligomer with terminal cyclocarboate groups. The rubbers from this mixture have a sufficiently high bond strength with a textile material, but do not have flame retardant properties.

Closest to the invention in technical essence is a rubber mixture based on a combination of isoprene and butadiene-methylstyrene rubbers, including modifying additives - resin SF-281 and modifier RU-1.

The bond strength of such textile cord rubbers is also insufficient. Thus, for example, in alternating bends, a partial breakage of the rubber bond with the cord occurs; in addition, such rubber compounds have a high cost.

The purpose of the invention is to increase the bond strength of rubber with synthetic textile material and the disposal of industrial waste.

The goal is achieved in that the rubber mixture based on a combination of synthetic cis-isoprene and butadiene-methyl styrene rubbers in a mass ratio of 70:30, including sulfur, N-cyclohexyl-2-benzthiazolylsulfenamide (sulfenamide), 2,2-dibenzothiazole disulfide , zinc oxide, carbon black with a specific geometric surface of 75-82 m2 / g (P-324), kaolin, white soot with a specific surface of 75-100 m2 / g (BS-100), antimony trioxide, chlorinated paraffin with bound chlorine 45-49 wt.% (KP-470), chloroparaffin with a content of bound chlorine 68-7 2 wt.% (CP-1100), indencumarone resin, monoethanolamides of synthetic fatty acids of the Ciu-C1b fractions, synthetic fatty acids of the Cai-Cas fraction, 2,2,4-trimethyl-1,2-dihydrochiiolin polymer (acet- Nanil P) and a modifying additive, contains as the last bottoms the production of dyes of bottoms bright green C in the following ratio of components. wt.%:

Cube bright green C6.0-8.6

Tar organic

impurities 56.2-58.2

Organic impurities 3.2-5.6

Inorganic impurities 4.3-7.5

Potassium carbonate 0.6-1.0

Potassium Formate / 4.5-6.7

Potassium salt of benzenesulfonic acid 12.2-14.8

Potassium Bicarbonate 5.0-5.6

VAT residue is formed in the trichlorobenzene regeneration step and is a uniform, brittle, black product. Melting onset temperature 65 ± 0.5 ° C. It is soluble in sulfuric acid, acetone, dimethylformamide, pyridine, worse in methanol.

Treatment of the bottom residue with an alkaline hydrosulfite solution shows that it contains 57.2-1.0% polycyclic organic resinous (non-cube) compounds.

The active principle of the bottom residue is the polycyclic molybdenum organic compounds, the condensation products of volantron derivatives with chlorophenols of various structures, formed as a result of hydrolysis.

The bottom residue contains about 7% of the dye of bright green-green C (16.17-dimethoxybenzontron) of the following structure OCHj

The characteristics of the components of the rubber compound:

Rubber SKI-3GOST 14295-79

Rubber SKMS-30

AR KM-15GOST 11138-78

Acetononil RTU 6-02-1116-77

SEROST GOST 127-76

Sulfenamide CTU 6-14-868-281

Dibenzothiazole disulfide GOST 7087-75 Zinc oxide GOST 202-84

Carbon black - P-324 GOST 7885-77

Kaolin KRGOST 19608-84

Bela soot BS-100GOST 18307-78

Antimony trioxide TU 48-14-1-82

Chloroparaffin HP-470 TU 6-01-568-76 Indenkumaronova resin OST 1430-77 Monoethanolamide FFA fraction Cio-CieТУ 38.10716-75

Synthetic fatty acids fraction Cai-Cas TU 6-01-59776

The rubber mixtures are prepared in a laboratory re-mixer at 70-80 ° C for 7-10 minutes and cured in a VP-9024 press at 143 ° C for 30 minutes. The modifier is added to the rubber composition along with the bulk solids.

the additive is introduced into the rubber composition along with the solids

The compounding of rubber compounds is given in table 1, the properties of rubber are indicated on table 2.

Claims (1)

Formula of the invention Fire-resistant rubber mixture based on a combination of synthetic cis-isoprene and butadiene-methylstyrene styrene in a weight ratio of 70:30, including sulfur, Y-cyclohexyl-2-benzthiazolyl-sulfenamide, 2.21 -fibenzothiazole disulphide, zinc oxide geometric surface 75-82 m2 / g. kaolin, white soot with a specific surface area of 75-100 m / g, antimony trioxide, chlorine paraffin with a content of bound chlorine of 45-49 wt.%, chlorine paraffin with a content of bound chlorine of 68-72 wt.%, indencumarone resin, synthetic fatty acid monoethanolamides acids of the Ciu-Cie fraction, synthetic fatty acids of the C21-C25 fraction, a 2,2,4-trimethyl-1,2-dihydroquinoline polymer and a modifying additive, characterized in that, in order to increase the bond strength of the rubber with synthetic textile material and waste management, rubber compound as modif iruyuschey additive comprises a bottoms production dye vat bright green C-based compounds resinification polycyclic structure - the condensation products of derivatives with violantrona lorfenols in the following ratio of the components of the rubber composition, wt.h: synthetic cis-isoprene rubber70 styrene butadiene rubber30 sulfur 2-4 M-cyclohexyl-2-benzthiazolylsulfenamide 1-3 2,2-dibenzothiazole disulfide 1-2 zinc oxide 0.5-1.5 carbon black with a specific geometric surface of 75-82 m2 / g 10-30 kaolin 30-40 white soot with a specific surface area of 75-100 m2 / g 10-15 antimony trioxide 4-6 chloroparaffin with a content of bound chlorine 45-49 wt.% 15-25 chloroparaffin with a content of bound chlorine 68-7215-25 wt.% indencumarone resin 9-13 monoethanolamides of synthetic fatty acids of the CicrCi60.5-1.5 fraction synthetic fatty acids fraction C21-C252-3 2,2,4-trimethyl-1,2-dihydroquinoline polymer 1-2 specified bottoms2-3  717703288 T a 6 l and a 1 Formulation of rubber compounds