The rubber mixture based on fluoro

 

The invention relates to the rubber industry. The rubber mixture based on fluoro SCF-26 contains, by weight.h.: GFR 26-100; magnesium oxide 13,0-14.4V, calcium hydroxide 0,6-1,2, barium sulfate 20 of calcium fluoride, 15, resorcinol of 0.6-0.7, triethylmethylammonium chloride of 0.3. The resulting mixture vulcanizer in the press at 150-160oC for 30 min Incubated at 200oC for 24 h Technical result consists in improving formemost rubber compound, the reduction of residual deformation, the increase in the relative elongation at break, improving appearance and reducing defective products. table 2.

The invention relates to the rubber industry, in particular to the rubber mixtures based on fluoro.

Known rubber mixtures based on fluoro SCF - 26 described in the publication "Forecaster", authors: S. P. Novitskaya, H. N. Nudelman, A. A. Dontsov, Moscow, Chemistry, 1988, page 60-129, which include magnesium oxide, calcium hydroxide, resorcinol and triethylmethylammonium chloride - (TEBAH).

The analogue may be taken USSR author's certificate 790742, MKI 08 L 27/12, "a method of manufacturing a rubber compound based on fluoro", in which the PR>

As the closest analogue may be adopted rubber compound, described in the journal "Rubber and rubber", 3, 1980, pp. 10-12, in the article "effect of the chemical nature of diatomic phenols and Quaternary ammonium salts of rubber vulcanizates SCF-26", containing fluoropolymer elastomer SCF - 26, magnesium oxide, calcium hydroxide, resorcinol, triethylmethylammonium chloride - (TEBAH) and fillers.

The disadvantages of the known rubber compounds are poor formability, and high residual strain, low elongation at break, low quality appearance and a large number of defective products obtained by vulcanization of the mixtures.

The technical result of the invention is to improve formemost rubber compounds, and reduction of residual deformation, the increase in the relative elongation at break, higher quality appearance and reducing the number of defective items received by the vulcanization of these mixtures.

The technical result is achieved by the use of a rubber mixture based on fluoro SCF-26, including magnesium oxide, calcium hydroxide, resorcinol, triethylmethylammonium chloride (TEBAH), characterized in that it Doc SCF-26 - 100 magnesium Oxide - 13-14,4 calcium Hydroxide - 0,6-1,2 barium Sulfate - 20 calcium Fluoride - 15 Resorcinol - 0,6-0,7 TABAH - 0,3 Examples 1-4. According to the invention using the fluoro SCF - 26, which as vulcanised agent add resorcinol and the filler is barium sulfate and calcium fluoride. As the vulcanization accelerator used triethylmethylammonium chloride (TEBAH). As the acceptor of the hydrogen halides and a vulcanization activator use a combination of magnesium oxide and calcium hydroxide. The rubber mixture is prepared in the mill PD 630, when the temperature of the rolls not exceeding 40-50oC. the resulting mixture vulcanized in a press at a temperature of 150-160oC for 30 min, and then incubated at a temperature of 200oC for 24 h To allow comparison of preparing rubber compounds with different combination of magnesium oxide and calcium hydroxide.

Conditions of preparation of the mixtures and the conditions of vulcanization of the same.

Table 1 shows the compositions of the comparison compounds, and table 2 - technical characteristics of the mixtures after vulcanization.

From each mixture produced in 30 parts, including the number of defective parts of the first mixture was 28 units, of the second mixture - 0 items, from triceram 2 and 3, have superior formability compared with the control mixtures, because the number of defective products produced from them significantly less. In addition, the proposed mixture reduce residual deformation, increase the elongation at break and to improve the appearance quality of the parts.

Claims

The rubber mixture based on fluoro SCF-26, including magnesium oxide, calcium hydroxide, resorcinol, triethylmethylammonium chloride, characterized in that it further comprises barium sulfate and calcium fluoride in the following ratio, wt. including :
Fluoropolymer elastomer SCF-26 - 100
Magnesium oxide - 13,0-14.4V
Calcium hydroxide - 0,6-1,2
Barium sulfate - 20
Calcium fluoride - 15
Resorcinol - 0,6-0,7
Triethylmethylammonium chloride - 0,3

 

Same patents:

The rubber mixture // 2199560
The invention relates to rubber mixtures based on fluoro SCF-26 and can be used for making rings, gaskets, seals, oil seals and products, operating at temperatures up to 200oC

The rubber mixture // 2193583
The invention relates to the rubber industry, in particular to the compounds based on fluorine, and can be used for manufacturing, for example, Salnikov

The invention relates to the field of production of rubber mixtures and vulcanizates from fluoro and can be used in aviation, automotive and other industries to obtain rubber resistant to ageing at high temperatures, to impacts of fuels, oils, greases, hydraulic fluids and acids

The invention relates to a new rubber mixtures based on fluoro

The invention relates to a new rubber compound based on silicone elastomer and can be used in aviation, automotive and other industries to obtain rubber resistant to ageing at high temperatures, to impacts of fuels, oils, greases, hydraulic fluids and acids

The rubber mixture // 2097393

The invention relates to compositions based on fluorinated polymers, and method of production thereof

The invention relates to utverzhdennym forecaster - copolymers vinylidenefluoride and hexaferrite, which are used for production of industrial products such as gaskets, seals for shafts, sleeves and seals with metal inserts

The invention relates to polymeric compositions tribological purposes, intended for use in friction units of machines and equipment

The invention relates to a new rubber compound based on silicone elastomer and can be used as anti-friction coatings on metal and rubbers

The invention relates to the field of production of abrasion resistant compositions based vinylidenechloride copolymers and can be used in the chemical, automotive, food processing and other industries

The rubber mixture // 2097393

The invention relates to compositions for coextrusion with poly (vinylidene fluoride) - based poly (vinylidene fluoride) (PVDF), polyalkylacrylate and acrylic and/or methacrylic elastomer, providing adhesion PVDF polymer incompatible polymer resin
Up!