RU2232170C1 - Rubber compound - Google Patents

Abstract

FIELD: rubber industry.

SUBSTANCE: rubber compound for manufacturing various-destination products, for instance slabs for acoustic coatings, is composed of, wt parts per 100 wt parts rubber: synthetic butadiene-styrene rubber DSSK-18 70.00, cis-isoprene rubber CKI-3 30.00, acetoneanyl-P 2.00, sulfur 2.00, 2,2'-dibenzothiazole disulfide 0.80, diphenylguanidine 0.80, zinc white 5.00, stearin 1.00, styrene-indene resin 7.00, colophony 3.00, carbon black P-514 26.60, carbon black P-803 40.00, and oil rubber 15.00.

EFFECT: improved physico-mechanical characteristics at sufficient strength of rubber compound.

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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, for example, plates for acoustic coatings.

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 /.

At the same time, the technological properties of the rubber compound (ductility, extrusion, etc.) and the technical parameters of the rubbers from this mixture (strength characteristics, oil and oil resistance) are improved. However, rubbers from this mixture have low indicators of frost resistance.

Known rubber mixture based on nitrile butadiene rubber containing carbon black 11803, stearic acid (SU 1700019 A1, 1991).

A known rubber mixture based on synthetic isoprene rubber, including sulfur, zinc oxide, a vulcanization accelerator, N-isopropyl-N'-phenyl-n-phenylenediamine, carbon black, a softener, stearic acid, a modifier, and 2-mercaptobenzthiazole, a softener as an accelerator - rosin and rubrax, modifier - molecular complex of resorcinol and hexamethylenetetramine - RU-1 and additionally contains phenyl-β-naphthylamine, butyl rubber and polyvinyl chloride in the following ratio, wt.h:

synthetic isoprene rubber - 86.3-89.7; butyl rubber - 4-6; polyvinyl chloride 6.3-7.7; sulfur - 3.5; zinc oxide - 52; mercaptobenzthiazole - 0.3; N-isopropyl-N’-phenyl-n-phenylenediamine-1 phenyl-β-naphthylamine-1; carbon black - 55; rosin - 0.5; stearic acid - 0.5. The molecular complex of resorcinol and hexamethylenetetramine-RU - 1-2; Rubrax - 4 (SU 2129575).

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, wt. h: nitrile butadiene 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 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, wt. h: nitrile butadiene rubber with a nitrile content of acrylic acid 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 2129132 C1 from 12.24.1996).

When creating the invention, the task was to obtain a rubber mixture with such characteristics that would allow the use of products from it under various conditions, namely with improved physical and mechanical properties with sufficient strength.

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

Synthetic styrene butadiene rubber

stamps-ДССК-18 70.00

Rubber cis-isoprene grade SKI-3 30.00

Acetononyl-P-oligomer 2,2,4-trimethyl-1,2-

dihydroquinoline 2.00

Sulfur 2.00

2,2’-dibenzothiazole disulfide 0.80

Diphenylguanidine 0.80

Zinc white 5.00

Stearin 1.00

Styrene indene resin 7.00

Rosin 3.00

Carbon black P-514 26.60

Carbon black P-803 40.00

Factis 15.00

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, expressed in improving the adhesion properties with sufficient durability of the rubber compound. 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, that is, the physical and mechanical properties of this rubber compound are improved compared to the known mixture (see table), we can conclude that the invention meets the patentability condition “inventive step”.

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

1. Dissolve rubbers DSSK-18, SKI-3.

2. Enter the oligomer of 2,2,4-trimethyl-1,2-dihydroquinoline, zinc white, factis.

3. Enter carbon black P-514, rosin, stearin.

4. Enter carbon black P-803, styrene-indene resin.

5. Introduce 2,2’-dibenzothiazole disulfide, diphenylguanidine.

6. Cut the mixture to cool.

7. Land the mixture on the roll.

8. Introduce sulfur.

9. Pass on a thin gap.

10. Cut off the mixture.

Main materials: SKI-3 rubber (GOST 14925-79); Synthetic butadiene styrene rubber DSSK-18 (TU 38. 103346-96); natural technical sulfur, grade 999 5.9990, class 1, 2 (GOST 127.4-96); white zinc BTs-1, BTsO, BTsOm (GOST 202-84); 2,2’-dibenzothiazole disulfide (GOST 7087-75); diphenylguanidine (TU 6-22-05763441-84-9.3); acetonanil-R - 2,2,4-trimethyl-1,2-dihydroquinoline oligomer (TU 6-02-1116-82); stearic acid (GOST 6484-96); styrene indene resin (TU 14-6-89-73); rosin (GOST 19113-84); technical carbon (GOST 7885-8b); P-514 brand, P-803 brand; Factis (TU 38.106257-79).

The rubber mixture is prepared on rollers, the temperature of the rollers of the rollers before mixing is not more than 60 ° C. The vulcanization mode of the samples to determine the physical and mechanical properties: time, minutes - 20 ± 3; temperature, ° С - 151 ± 3; the pressure on the mold, MPa (kgf / cm ² ) - 7.5 ± 0.5.

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 indicators: 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): Synthetic butadiene-styrene rubber mark-DSSK-18 70.00 Rubber cis-isoprene grade SKI-3 30.00 Acetononil-P 2.00 Sulfur 2.00 2,2'-Dibenzothiazole disulfide 0.80 Diphenylguanidine 0.80 Zinc white 5.00 Stearin 1.00 Styrene indene resin 7.00 Rosin 3.00 Carbon black P-514 26.60 Carbon black P-803 40.00 Factis 15.00