RU2232172C1 - Rubber compound - Google Patents

Abstract

FIELD: rubber industry.

SUBSTANCE: rubber compound for manufacturing various-destination products, including slabs for acoustic coatings, is composed of, wt parts per 100 wt parts rubber: butadiene-nitrile rubber 100.00, thiuram D 1.50, naphtam-2 1.50, zinc white 5.00, colophony 5.00, oil rubber Agris RO 10.00, chalk 25.00, carbon black P-701 75.00, sulphenamide C 2.00, N.N'-dithiodimorpholine 2.00, dibutyl phthalate 10.00, oil I 8A 5.00.

EFFECT: improved physico-mechanical characteristics.

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Description

The invention relates to the rubber industry, in particular the production of rubber compounds used for the manufacture of products for various purposes, including acoustic coatings.

Rubber compounds based on various rubbers are known. For example, an unsaturated rubber-based rubber compound comprising sulfur, a vulcanization accelerator, zinc white, stearic acid, a bulking agent and an antioxidant. The mixture further comprises 2.2 ’tetrahydrate, 6,6’-tetramethylpiperidyl fulvene or its N-oxide radical in the following ratio of components, wt.h .: unsaturated rubber 100; sulfur 0.5-2.5; vulcanization accelerator 0.7-4.5; zinc white 5; stearic acid 1-3; filler 30-80; antioxidant - 1-5; 2.2 ’, 6,6’-tetramethylpiperidylfulven tetrahydrate or its N-oxide radical 0.2-2.5 (SU No. 1510325 of January 15, 1990).

Also known is a rubber mixture composition, parts by weight: rubber SKMS-30-ARKM 15-100; sulfur 1.7-2.5; zinc oxide 4-6; altax 1.9-2.3; diphenylguanidine 0.4-0.8; stearic acid 1.2-1.7; carbon black 30-50, chlorinated epoxylignin with a chlorine content of 14-17 wt.% with an epoxy number of 3.5-3.8 (SU No. 2052472 of January 15, 1990).

Known rubber compounds based on nitrile butadiene rubber (SKN-18), including fillers, vulcanization activators, vulcanization accelerators, softeners, dispersants and sulfur (other targeted additives may be added) / Fedyukin D.L., Makhlis F.A. Technical and technological properties of rubbers. M .: Chemistry, 1985, p. 217 /.

Known oil-resistant rubber composition based on nitrile butadiene rubber containing sulfur, altax, zinc white, stearin, carbon black, dibutyl sebacinate or dibutyl phthalate. It additionally contains sulfenamide, acetonanil, thermal stabilizers, dianilide (4-phenylaminophenyl) thiophosphonic acid (B-25) and 2,4,6-tri (dibutylaminomethyl) phenol (M-9) in the following ratios of ingredients, parts by weight: butadiene- nitrile rubber 100.00; sulfur 1.80-2.00; altax 1.30-1.50; sulfenamide "C" 3.00-3.50; stearin 1.20-1.50; indencumarone resin 3.00-3.50; zinc white 3.00-5.00; dibutyl sebacinate 12.00-15.00; carbon black 50.00-55.00; acetonanil 1.00; thermostabilizer B25 0.50-1.00; thermostabilizer M-9 0.50-1.00 (SU No. 99115077).

Known rubber mixture based on nitrile butadiene rubber with a content of acrylic acid nitrile of 17-23 wt.%, Including sulfur, zinc oxide, carbon black P803 with a specific geometric surface of 12-18 m ² / g, stearic acid. It additionally contains N, N'-diphenylguanidine, di- (2-benzothiazolyl) disulfide, aldol-α-naphthylamine, N- (4-hydroxyphenyl) naphthylamine-2, N- (1,3-dimethylbutyl) -N'-phenylenediamine -1.4, dibutyl phthalate, ultrafine diamond-containing powder (UDAG) in the following ratio of components, parts by weight: butadiene-nitrile rubber with an acrylate content of 17-23 wt.% 100.00; sulfur 2.45-2.65; N, N'-diphenylguanidine 0.20-0.30; di- (2-benzothiazolyl) disulfide 2.60-2.80; zinc oxide 7.40-7.60; aldol –α- naphthylamine 3.80-4.20; N- (4-hydroxyphenyl) naphthylamine-2 0.90-1.10; N- (1,3-dimethylbutyl) -N'-phenylenediamine 1.4-0.80-1.20; carbon black P803 with a specific geometric surface of 12-18 m ² / g 128-132; stearic acid 0.80-0.20; dibutyl phthalate 18.0-22.0; ultrafine diamond-containing powder (UDAG) 0.1-1.0 (prototype - RU No. 2129132 C1 from 12.24.1996).

When creating the invention, the task was to obtain a rubber mixture with improved physical and mechanical properties.

The problem is achieved in that the rubber mixture, characterized in that it includes in the following ratio of components, parts by weight (per 100 parts by weight of rubber):

Nitrile butadiene rubber

Brand-BNKS-40 AM, AMN 100.00

Tiuram-D-

tetramethylthiuram disulfide 1.50

N, N’-dithiodimorpholine 2.00

Sulfenamide-c-

-N-cyclohexylbenzothiazosulfenamide-2 2.00

Naftam-2-

-N-phenylnaphthylamine-2 1.50

Diafen-FP

-N-isopropyl N’-phenylphenylenediamine-1.4 1.00

Zinc white 5.00

Rosin 5.00

Chalk 25.00

Factis Agris RO 10.00

Carbon black P-701 75.00

Oil And 8A 5.00

Dibutyl phthalate 10.00

New is the new combination of well-known components used in various rubber compounds, and their new quantitative ratio, which allows to obtain a technical result.

According to the applicant, this rubber compound is unknown and it can be concluded that the invention meets the condition of patentability “novelty”.

Since the claimed combination of essential features exhibits a new property that allows to obtain a change in the quantitative measure of the result, namely, the physicomechanical parameters of this rubber compound are improved compared to the known mixture, we can conclude that the invention meets the patentability condition of “inventive step”.

Obtaining the inventive rubber compound is carried out under industrial conditions in the following sequence:

Pre-prepare the masterbatch of the following composition per 100 parts by weight rubber:

Rubber nitrile butadiene brand BNKS-40 AMN, AM 100;

N-phenylnaphthylamine-2 1.50; N-Isopropyl N’-Phenylphenylenediamine-1.4 1.00;

Zinc white 5.00; chalk 25.00, carbon black P-701 4.00.

Make the masterbatch in the following sequence:

1. Landing rubber butadiene-nitrile brand BNKS-40 AMN, AM on the roll

2. Introduce zinc white, N-phenylnaphthylamine-2. N-Isopropyl N’-Phenylphenylenediamine-1,4.

3. Enter chalk in parts, carbon black P-701, factis Agris RO.

4. Make a cut.

5. Cool the rolls of the rollers.

Make a rubber mixture in the following sequence:

1. Land on the roll of the masterbatch.

2. Enter 1/3 of carbon black P-701, dibutyl phthalate.

3. Enter 1/3 of carbon black P-701; oil And 8A.

4. Enter sulfenamide "C", 1/3 carbon black, rosin.

5. Carry out a cut for cooling.

6. The mixture is planted on the roll, N, N’-dithiodimorpholine is introduced.

7. Enter Tiuram “D”.

8. Pass on a thin gap (3 times).

9. Carry out a slice.

Vulcanization is carried out on continuous vulcanizers.

The main materials:

Nitrile butadiene rubber BNKS-40 AM, AMN (TU 38.30313-98); thiuram-D-tetramethylthiuramdisulfide (GOST 740-76); N-phenylnaphthylamine-2-naphtham-2 (GOST 39-79); N-isopropyl N’-phenylphenylenediamine-1,4-diaphen AF (TU 2492-002-05761637-99); zinc white (GOST 202-84); Rosin (GOST 19113-84); chalk MMOR, MMS-1 (GOST 12085-88); carbon black P-701 (GOST 7885-86); Factis Agris RO (TU 38106257-79); sulfenamide-C (TU 113-00-057616376-02-95); N, N’-dithiodimorpholine (TU 6-14-321-79); dibutyl phthalate (GOST 8728-88); oil I 8A (GOST 20799-88).

The properties of the rubber compound according to the known and proposed compositions are shown in the table.

Analysis of the data shown in the table shows that the proposed rubber composition according to the invention has the best results in terms of: conditional tensile strength, elongation at break and relative residual deformation. In view of the foregoing, in the applicant's opinion, the invention meets the patentability condition “industrial applicability”.

Claims (1)

The rubber mixture, characterized in that it includes in the following ratio of components, parts by weight (per 100 parts by weight of rubber): Butadiene-nitrile rubber grade-BNKS-40 AM, AMN 100.00 Tiuram “D” 1.50 Naftam-2 1.50 Diafen-FP 1.00 Zinc white 5.00 Rosin 5.00 Factis Agris RO 10.00 Chalk 25.00 Carbon black P-701 75.00 Sulfenamide “C” 2.00 NN'dithiodimorpholine 2.00 Dibutyl phthalate 10.00 Oil And 8A 5.00