CS227316B2 - Polysiloxane based composition absorbing mechanical energy - Google Patents

Description

The present invention relates to a composition based on polysiloxanes containing mechanical energy. This device can be used to absorb energy in various types of devices intended to absorb this energy, for example in hydraulic dampers. These devices, filled with the abovementioned absorbent means, can be used to absorb energy generated by impact or vibration in the metallurgy, shipbuilding industry. , the railway industry, for example in bumpers, for the same purpose ▼ the automotive industry, as well as in the aviation, mining and engineering industries ·

Polish Patent Application No. P-198 004 discloses a composition consisting of boromethylphenylsiloxane polymers, fillers, pigments and plasticizers, for example silicone oil and glycerol.

The disadvantage of these environments, which at the same time absorb energy in both impact and vibration, is that in some cases they have too much elasticity, especially when several hundred horsepower is applied in a few seconds. some of the active fillers, such as colloidal silicic acid, so that viscosity changes during use, they also contain a large amount of pigments, which are inactive fillers and can therefore corrode the structure despite the protective effect of silicone oils and polyhydroxy alcohols

Another disadvantage of this composition lies in the great dependence of its viscoelastic properties on temperature, so that the use of the composition below -30 ° C and at a temperature above 50 ° C is adversely affected.

A composition based on polysiloxanes for absorbing mechanical energy is also known from French Patent 7,711,032. This composition contains high polymeric siloxane compounds which comprise from 90 to 99% of segments containing methyl groups, from 1 to 10% of phenyl groups and less than 1% vinyl groups.

It also contains this composition. still active fillers with a specific surface higher than 300 m / g, the type of colloidal silicic acid and filler with a specific surface meacimálně 50 m ^{2 / g, j} and caprine animals plasticizer type or ^{g h} anokřemičitýc compounds.

The adaptation of this device, which has hitherto been used as a non-vulcanized silicone elastomer in a new function, ie the impact energy transfer, has great disadvantages, which essentially result from the use of the device for another purpose.

A major disadvantage lies in the viscosity changes during storage. The composition is thixotropic and its viscosity gradually increases over time. Due to the change in the consistency of the composition during storage, there are also variations in energy transfer as well as an explosion when the composition is purged.

At lower temperatures, the devices filled with the device may behave as solid bodies, and for this reason the mechaic energy is transferred to the design of the device to be protected by the device.

Another disadvantage of this composition is that its elasticity increases over time due to the presence of vinyl groups. In the presence of vinyl groups, the energy decomposition results in a lower temperature and consequently a gradual crosslinking of the polymer used.

A further disadvantage of this composition is the erosion of the structure, so that energy decomposition changes during multi-year use.

It has unexpectedly been found that the composition of the invention does not have the above disadvantages. This composition consists of salts of silioone polymers whose chemical structure, oisekelastic properties, and greater para., Rapid absorption and decomposition of the stirrer energy in a much higher temperature range of -100 to +300 ° C at various tics. Conditions.

The composition according to the invention simultaneously fulfills two essential functions. It decomposes the impact energy into the plastic stream.

The role of the plastic buffer of the composition according to the invention is accomplished by the use of cell boron siloxin polymers or polyphenyl peroxide polymers depending on the temperature of the cell.

Depending on the temperature conditions when using dimethylene polymers, methenylphenyls, exiled polymers, polymers, exemplified polymers, they also fulfill the function of an impact energy environment. and polylyl carbonansiloxene polymers. The proportion of polymers in the energy absorbing means depends on the temperature and the desired oeekeeastic properties of the absorbent device.

The silicone polymers used to make the composition of the invention depend on the modulus of elasticity of the individual polymers during use as well as the amount of energy absorbed and the desired movement of the absorbent device.

As mentioned above, the composition of the invention suitable for use over a wide temperature and tic range includes various polymers which are selected such that the properties of the composition and changes during use in different applications types of absorbent devices exactly match the requirements of this device.

The choice of the main constituents of the polymeric salt takes into account the lowest temperature at which the composition of the present invention is to perform both the elastic bumper function and the energy-distributing viscous environment at a tensile point of 100 M?.

The function of the fillers in the composition is quite different from the role of the same substances in the curable silicone elastomers.

Fillers contained in the composition of the invention reduce the effect of temperature on changes in volume of the composition and increase thermal conductivity. Therefore, fillers with a special crystalline structure, preferably in the form of low internal friction plates, are used in the composition of the invention. of the composition and no thixotropic properties. The device of this type is then fully capable of compensating for impacts and damping the impact energy due to its plasticity.

Over the long term, energy absorption devices, in particular high pressure, result in the role of compositions which contain other additives such as emollients, non-adhesive additives and glidants.

Emollients are, for example, silicone oils, aliphatic acids and their salts, organic tin salts and other substances which have a stabilizing effect on the viscosity of the composition with respect to the mobility of the individual layers of the composition during movement of the piston into the absorbent device. These plasticizers have an additional function, since under their influence the adhesion of the composition to the inner surfaces of the absorbent device increases, and for this reason the tightness of the absorbent device is increased during use. The glidants used in the composition according to the invention are in particular solid, finely powdered polyhydride dihydride and graphite which protect the device from erosion. These glidants must, like fillers, have a specially selected crystallographic structure in order to ensure good glidant properties during the high pressure generated by the use of the compositions.

The composition according to the invention comprises as a main component a blend of polymers having properties which need to be adjusted according to the type of application and, in particular, depending on the desired temperature range. The above-mentioned binders, plasticizers, antiadhesives and glidants are added to the polymer mixture.

Accordingly, the present invention provides a polysiloxane-based energy-absorbing composition comprising a plurality of polymer polymers, fillers, and a plasticizer, characterized in that not more than 100 parts by weight of polymeric polymers;

the polymorphic parts of the methyl chloropolysiloxic polymers or the methoxysiloxene polymers having elongated properties having a viscosity of 10 ° to siloxene

5.1 ¹⁰ Pa. 98 CZ ^ ^ ^ по п п ^! ^ Vitikelčtticlých polysiloxmových parts. polymers from meeylfenylpolysikxxnkových polymers eimet ^y lpolysikxxlnlových polymers meetllriflulrprc) p ^y l ^p l ^{y about} xčnlxvých pol ^ e ^ in ^ZDY of vikozi ^ ¹⁰ θ e ^f 5.10 ^ θ ^p and Neto oe ^ey l ^to Ar ^at kran ^p ( эl ^about xxιmc ^{y> h} after se ^ Me ^ vistazitou to ^10? C ^{from P} · ^ C to jednoUivě or SMMS EŽ hmoOniltních 80 parts silikonovéhk oeeylfenyltnlilonový oils from oil ^and vit kzitlu third ¹⁰ ^ ^{e? 10} and · ^ ^p ^ ^ metylsl.l xnový oil · St Zita fifth ^^ ¹ ° CZ ^ ^p ^ .s. No. methyl сЬ г ^ ^ ^ Н ^ пу хшуу oil with vinyl kozltou second ¹⁰ "^ ^M e ^{1 p} and ^ with the following ingredients:

EŽ 10 h oor ^ ^^ S ^ S ^ i ^^ ch parts člifatiklých acid 5 EŽ 30 carbon atoms or with] !, EŽ hIno0niltních 10 parts organic TOLI preferably eilut ^y leilčjrάtu oktenátu or tin,

0.01 to 30 parts by weight of powdered glidant and up to 1000 parts by weight of filler having a maximum surface area of 200 m ² / g.

The polysiloxene composition for operating in the temperature range of -100 to +100 ° C is based on a blend of polymers with the following components based on 100 parts by weight of the blend of polymers.

about ^1-98 parts of methyl hrnobnotních nyltors ^ ^ ^ o ^p oxníov of ^poly mer vis ou ^ z ^ 10 ° ^and

5.10 ¹⁰ Pa. ^the »up 5β tanotních Tano-diisopropyl methyl O ^{O f} tnylsi oxιnlového. of a polymer having a 10? 5.1010 ^, ^1-50 Tao totiotních says ^profiles butterfly enylsi ^{f i} i ^O onového oils with VI Zita third ^^ ¹⁰ ^ to 10® Pa.s.

A composition based on polysiloxanes for use in the temperature range -60 to +100 ° C is obtained from SMOS polymer with the following components, based on 100 parts of ^{the poly} hmoonnotních € m) irní SMOS:

10 parts of methyl až'98 hmoonnotních lborsilox ^y <sponding polymer having a viscosity of 10 Pa.s to 5.10 * 8-98 parts hmnonnotních metylftnylsiOoxnoového polymer having a viscosity of 10 to

5.10 ¹⁰ Pa. ^s , g

up to 50 parts by weight of dimethylpolysiooxno polymer having a viscosity of from 10 to 100

5.10 ¹⁰ Pa « ^s .

The polysiloxane-based composition for the temperature range of -40 to +60 ° C can be obtained from a polymer blend containing successor components based on 100 parts by weight of the polymorph blend:

up to 98 parts by weight of methylborsiloxem polymer with a viscosity of 10 ° to ⁵ · ¹⁰¹⁰ Pa.s, g

up to 98 nmmo. parts of a dimethylpolysionx polymer having a viscosity of 10 ° to 10 ° C

5.10 ¹⁰ Pa.

up to 50 parts by weight of methylsilyl oil having a viscosity of 5.10 ° to 10 ° Pa.s.

The polysilox mandrel composition for the temperature range of -20 to +80 ° C can be obtained from a blend of polymers with the following components, based on 100 parts by weight of the polymer blend;

g to 98 parts by weight of methyl borosoxime polymer having a viscosity of 10 to 5.10 ^{10 10} Pa · ^s , g

up to 98 parts by weight of dimethylpolysionxime polymer having a viscosity of 10 ° to 5.10 ¹⁰ Pa. ^s to 50 oot ^ ^^ ^ i ^^ axes of those parts ^of metylftnylsiliOonov ^eh of oil viscosities and the third ^10-F 10® Pa.s.

Polymer compositions for a temperature range of -20 to +150 ° C can be obtained from a polymer blend containing the successor of the component based on 100 parts by weight of the polymer composition:

to 97 parts by weight of polymer with metylboreiloxwiového vi.skozi.tou to 10 ^e

5.10 ¹⁰ Pa. ^s ,

Q to 97 haoonoot parts of a methylphthylsulfonic polymer having a viscosity of 10 to 100

5.10 ¹⁰ Pa. ^s ,

O to 97 parts by mass otních oetnltrifluoipropylsiooxnoového polymer with a viscosity of 10 ^and 5.10 ¹⁰ mbar. ^with up to 50 parts per million of oettlchlorophthilosilicone oil having a viscosity of 2.10 to 10 ¹ Pa.is.

The polysiloxide composition for a temperature range of +20 to +300 ° C can be obtained from a polyolytic SO2, which contains the successor components, based on the ox 100 parts of the polyol salts.

Ί to 97 parts by weight of the ethylphenyl borosoxime polymer having a viscosity of 10 to 5.10 ¹⁰ Pa. ^s to 97 parts hmoknoktních oeeyl (oetylfeoyl) kбrboranzi0ox1nlového polymer having a viscosity of 10 ^{7 and} 10 ¹⁰ Pa. ¹ ^ and ⁸⁰ ^ п Ьоо'Ьк! ^ <iílů oety ^ e ^ lsll.fonovítoo oils Vol ^^ Z ^ ou 5 · ¹⁰ ^ to ^{107 p}

Polysiloxem composition,. 10 MPa under the above-mentioned temperature conditions contains about 100 parts by weight of this salt and the following additives:

0.01 to 10 parts by weight of 5 to 30 carbon atoms of the polyfatolic acids or their salts, the acids selected in particular being oleic, erucic, paloitic, x stearic or their salts, preferably in a ratio of 1: 1 x advantage of stearao litho,

0.01 to 10 parts by weight of organic tin salts, preferably tin eibutyleilaurate or its dioctenate,

0.01 to 10 parts by weight of solid glidants, preferably about 100% by weight of ploldel with a specific area of not more than 200 m / g, preferably bridges.

Polysiloxam compositions for use at pressures greater than 10 MPa at the above-mentioned temperature ranges can be obtained from polymeric compositions containing about 100 parts by weight as a result of the additive:

p up to 1000 ЬооОпоо ^! ^ ploldel parts with a specific surface area of not more than 200 m / g, preferably at least,

0.1 to 30 parts by weight of solid lubricants, preferably of hydrogen sulfide or graphite.

The composition of the invention is composed of readily obtainable polymers, fillers x other components x, and is prepared locally in a mixing apparatus for 3 to 5 hours. In order to improve the combing effect, eos is possible. Heat nx 50 to 80 ° C.

The polymers used as constituents of the composition according to the invention can be obtained by known methods, in particular by condensation of siloxanedioles or by copolymerization of cyclosiloxenes using chain-length controlling agents to obtain the desired viscosity.

*

The necessary data for all components of the compositions according to the invention will be given below.

Borsiloxtrin polymers

The methylborsiloxarn polymers were prepared by condensation of the polydimeethers with boric acid at 100-120 ° C in a mixer. The same polymer can be obtained by the method of British Patent No. 947,847, US Patent No. 2,541,851, and Germany Patent No. 1,045,092. Borsiloxene polymer US 4046 (Miland Silicones UK) and polymer RP 724A can be used from commercially available polymers. (Rione-Poulenc FriacCe).

Methylphenol borosilicate polymers can be obtained in an analogous manner, in particular by condensation of oetylfinililoxenediol with boric acid. For example, the method described in Polish Patent Application No. P-198004 may be used.

Methylphenyl siloxene polymers

These polymers can be obtained by copolymerization of the corresponding cyclosiloxanes in the presence of alkali catalysts. They can also be produced by the process of Polish Patent No. 105,234, French Patent No. 1,188,495, Soviet Patent No. 197,173, and US Patent Nos. 2,875,172 and 2,954,357.

Commercially available E 350 polymers (ICI United Kingdom) as well as other polymers having a phenyl group additionally may be used in the preparation of the composition of the invention.

Dimethyl polycloxiloxene polymers

Dimethylpolytiloxene polymers can conveniently be obtained by polymerizing octemethylcyclotetiasiloxines at 120-150 ° C in the presence of alkali catalysts and molar monovalent tanoonotone regulators, typically the hexamethylsiloxane is used as the regulator. The same polymers can also be obtained by the process of Polish Patent Specification No. 105,234, French Patents Nos. 1,354,443 and 1,474,899 and 1,108,764, and U.S. Pat. Nos. 2,875,172 and 2,954,357.

The polymers Gomme 400 (Rionn-Poulenc France) or SISS (F ^ ia ^ <^ c.e) or E 300 (1C1 United Kingdom) or (Dow Corning United

Ββ ^ ΙπΟθ). Methyltrifluoripiopyltiloxyl polymers

Methyltrifluoropylsiloxyl polymers can be obtained by copolymerization of cyclohexyl in the presence of alkali catalysts at 100 ° C.

These compounds can also be obtained by the method of U.S. Patent No. 105,234, U.S. Patent Nos. 3,061,545 and 3,127,433.

Is also. commercially available Silastic LS (Dow Cooriing USA) can be used.

Methylphenylcarboransiloxane polymers

These polymers can be obtained by condensation of bismethoxydimethylsilo-m-carboranes with 8 methyl chlorosilanes.

These compounds can also be obtained by the method of U.S. Patent Nos. 3,388,090, 3,388,091 and 3,388,092.

Commercially available polymer Dexil 300, Dexil 400, and preferably Dexil 201 (Oil Matison Corp. USA) may also be used.

Methylsilicone oils

Methyl silicone oils are commonly available in Poland under the trade names Silol and Polsil 0M, in France under the names RHodorsil 47 V and in the US under the names DC-200 and DC-331 ·

Methylphenylsilicone oils

These oils are also commercially available, including Rhodorsil 633 V5 (Rhone-Poulenc, France) and DC-510 (Dow Corning USA).

Methyltrifluoropropylsilicone oils

These oils are available under the trademark FS-1265 (Dow Corning USA).

Aliphatic acids and their salts

These substances are commonly supplied, oleic acid, palmitic acid, lithium stearate is supplied by a number of companies. A mixture of oleic acid and erucic acid can be obtained by hydrolysis of rapeseed oil.

Fillers

Low specific surface area fillers such as talc, graphite, boron nitride and the like are commercially available.

Organic salts of tin

These salts are commonly supplied. Tin tibutyl dilaurate is used in the plastics industry as a stabilizer for PVC under the trademarks Stawinor or Stancler.

Solid lubricants

Molybdendisulfide and graphite are commercially available. Molykote Z (Dow Corning USA) is also readily available.

The energy absorbing polysiloxane compositions containing the above ingredients can be used over a wide temperature range of -100 to +300 ° C and their viscoelastic properties can be adjusted according to the type of absorbent device in which they are to be used.

The composition according to the invention has a constant viscosity in use and is suitable for absorbing both low and high energies.

The examples which follow illustrate the composition of the composition depending on the operating conditions, in particular temperature, pressure and the amount of energy absorbed according to the intended use.

Example 1

A polysiloxin composition intended for a temperature range of -100 to +100 ° C to absorb energy in the event of an impact, e.g. aviation can be prepared as follows:

The mixer mixes the hour metylfenylborsiUoxanového 400 g of polymer having a viscosity of ^{1000 P} 000'- aa 5 ^{00 g of} methyl ^e ylfenylsi oaimového polymer with Zita ^vis-10 ® ^P. К ^then this mixture was added 1 i ^e alkyl ® quinolinyl and 1 g of tin dibutyldilaurate and the mixture was stirred for an additional hour. As soon as the viscosity begins to decrease, 100 g of methylphenylsilylion oil having a viscosity of 30 Pa and 200 g of quartz flour with 5 molybdenum disulphide are added.

After thoroughly mixing the entire reaction mixture for an hour, the composition is degassed in vacuo and then filled, for example, with the absorption device described in Polish patent application P-198 005.

Example 2

A liquid composition for a temperature range of -100 to +100 ° C, suitable for energy absorption, for example as a buffer for movement obstruction, can be obtained as follows:

The mixer mixes 500 g íetylfem ^of 18iliUonovéhu oil visiuzituu 30 mbar, 250 g íeeylfenУl · iliUonovéhu polymer with viskuzituu 30 10 ⁷ Pa, and 250 g of methyl ^ ll ^ i ^ inll ^ t ^ o ^ c ^ i ^ iloosnov ^ about a polymer with a charge of ¹⁰ ? ^P and. ^ Js QMS was mixed for 3 ⁰ minutes and then ^p s ^ ^{afford 1 g of} petroleum jelly oil, 5 g of dibutyltin dilaurate, 100g of talc A.5 íoUybdetOiiuUfidu g. The mixture is stirred for an additional hour at 50 ° C, then allowed to cool, degassed in vacuo to provide a means for filling the cylinders known as Polish Energy Application No. P-198 005 .

Example 3

The polysiloxane composition for temperatures ranging from -60 to +100 ° C for filling bumpers for climbing cars from Polish patent application No. P-206 170 can be obtained as follows:

The blender was mixed 1,000 g diíitylpollsiOoxmu) véhu polymer having a viscosity of Pa 10®, 70 ^g íeeylft ^nl LSIL -ones ^with it ^{s p} o ^{l y} ^^ ^ ru vistaHou with ^{20 P} 10® about aa ⁵⁰⁰ g ^ interpolymer metylborsilkkonového having a viscosity of ⁵⁰ to ¹⁰ aa ® ^P ^ it was stirred nu. ^{P k} к ^tet SIIS added 500 g of talc and 100 g íoUybbet0i8uUfidu. The mixture was stirred at 50 ° C for 2 hours and then degassed in vacuo. This net is filled with bumper cylinders for railroad cars weighing 100 tons.

Example 4

The polysiloxide agent for use at a temperature of -60 to +100 ° C, intended to be used as a buffer to limit movement, for example in bridges or gates, can be obtained from the following mixture:

The mixer was thoroughly pnmíaí metylfenylsilikonového 1000 g of polymer having a viscosity of ^{5,000,000 p} · 200 ^grams of polymer meeyltorsHoxarového St. Zita ^^ I ^{0? p} aa 100 ^{g of} dimethyl siloxime polymer having a viscosity of 10 Pa. Then 1 g of erucic acid, 2 g of tin octanoate and 25 g of graphite are added.

After thoroughly grinding the ingredients for 2 hours, 100 g of silica flour is added and the mixture is stirred for an hour.

The mixture is then degassed in vacuo and used to fill mechanical energy absorbing devices.

Example 5

A polysiloxide composition for operating at a temperature range of -40 to +60 ° C, for example. for filling car bumpers according to Polish patent application. No. P 206 170 can be obtained as follows:

The aphids apparatus stirred for 1 hour 1000 g dimetylpllysiloxшlového polymer having a viscosity of ²⁰ x ¹⁰ ^ ^P, and ^{100 g} meeyl ^b orsi0oxιowv ^s hl polymer with vistozitou ²⁰ * ¹⁰ ^ ^P a and ^{500 g} of talc at 50 ° C followed by portionwise 500 g of silicone oil having a viscosity of 100 Pa and 30 g of molybdenum sulfide are added. The mixture was stirred for an additional hour, then degassed in vacuo. The resulting means is used to fill the rollers for absorbing impact energy.

Example 6

The polysiloxic agent, designed to operate in the temperature range of -40 to +60 ° C for filling buffers to limit movement in gates and mechanical engineering, can be obtained as follows:

In a blender, 100 .mu.g of dimethylplysiloxyl polymer with viscosity is mixed.

1 ° ⁷ ^^ ⁵ ^ ^{00 g} meeyltorsil ornnrého polymer with vistozitau x ⁵⁰ W · ^P AA 3 ^{00 g} ^ new methylsilicone oil having a viscosity of 500 Pa. The mixture was stirred for 2 hours. 5 g of a 1: 1 ratio of oleic acid and erucic acid and 2 g of tin dibutyldilaurate, 20 g of molybdenum disulphide and 500 g of talc are then added. Then stir the mixture for an hour, get rid of it! It is used for filling cylinders in a motion limitation device as described in Polish application δ. P 198 005

Example 7

The polysiloxide agent for operating in the temperature range of -20 to +80 ° C, intended for filling motion reduction devices in electric turntables, can be obtained as follows:

In a mixer, 200 g of methyl siloxiloxide polymer having a viscosity of 10 Pa, 500 g of dimethyl polysiloxone polymer of viscosity of 5,000,000 Pa and 100 g of methylphenol-8-ol oil are mixed with a viscosity of 1000 Pa and mixed for 2 hours. Then add yet. 100 g of talc, 5 g of oleic acid, 1 g of tin dibutyldilaurate and 10 g of graphite, and the mixture is stirred for a further hour. It is filled with the restraint buffer used in turntables.

She said d 8

The polysiloxide agent for operating in the temperature range of -20 to +80 ° C for filling brake systems in calculating machines can be obtained as follows:

10 g of talc and 5 g of graphite are added to 100 g of the polymer mixture obtained by the method of Example 7. The resulting mixture was stirred at 50 ° C for 1 hour. The brakes for computer braking systems are then filled in this way.

Example 9

Polysiloxide agent for working in a temperature range of -20 to -20 ° C. . + 150 ° C, designed to fill the buffer systems used in meealurgy, can be obtained as follows:

The mixer 3 hours mixed 100 g meeylborsiooximového polymer having a viscosity ^{of 50} of Ю ⁶ aa ²⁰ g methylphenylamino ^ lsilitonovétoo ^{the poly} mer containing ¹ 5% ^{f ene-yl-voltage} 'groups as vistozitou 20 ¹⁰ ® ^P and ^{30 g of} methyltriethoxysilane Fluoropropene polymer having a viscosity of 1,000,000 Pa and 10 g of methyl chlorophenylnyl oil having a viscosity of 700 Pa. Then 20 g of chrome green and 5 g of graphite are added. The mixture was stirred for an hour, then evacuated and used to fill the rollers with a motion-limiting device.

Example 10

The polysiloxarn composition for working at a temperature range of -20 to +150 ° C, intended for filling equipment for restricting movement in automatic production lines, in particular for filling hydraulic presses operating at high frequency, can be obtained as follows:

To 100 g of the polymer blend mentioned in Example 9 were added 0.3 g oleic acid, 1 g tin octanoate, 3 g lead and 100 g talc. The mixture was stirred for 2 hours and the composition was then filled with the rollers of the motion-limiting device.

Example 11

The composition for use in the temperature range of +20 to +300 ° C can be obtained as follows:

The mixer was 1000 g meeylfenylboгilliOonového polymer having a viscosity of 50 oo ¹⁰ ® ^P for stdlého stirring thoroughly ^p Romis 5 ^{00 g} mee ^{yl f} en ^y l ^k arborsni ^l l ⁱ Konov ^s him ^{the poly} mer of viskozltě 100,000 Ps and 100 g of methylphenylillione oil containing 40% phenyl groups having a viscosity of 10,000 Pa. After thoroughly mixing these polymers for 1 hour, 20 g of oleic acid, 50 g of tin dibutyldilsurate, 200 g of graphite with 15 g of zinc white are added. The mixture was stirred at 100 ° C for 2 hours and then degassed in vacuo. The composition thus obtained is used for filling energy absorbing devices in metallurgical plants.

1

Example 12

The polysiloxane composition for working at a temperature range of +20 to +300 ° C can be obtained as follows:

000 g of the polymer blend described in Example 11 was mixed with 500 g of zinc white and 50 g of molybdenum disulfide. The mixture was stirred at 100 ° C for 2 hours and then degassed in vacuo. The means thus obtained is used to fill the rollers of the bumpers operating at high temperatures.

Claims (5)

SUBJECT OF THE INVENTION A mechanical energy-absorbing polysiloxane-based composition composed of polysiloxane polymers, fillers and plasticizers, characterized in that it contains, per 100 parts by weight, the following blend of polymers: up to ¹⁰ weight siloxane 5.Ю Pa.s parts metylborpolysiloxanových e metylfenglborpolypolymerů polymers or elastic properties and viscosity of 10 to 1 to 98 parts by weight of viscoelastic polysiloxane polymers from the group of methylphenylpolysiloxane polymers, dimethylpolysiloxane polymers, methyltrifluoropropylpolysiloxane polymers having a viscosity of from 10 to 5 * 10 ¹⁰ Pa.s or methylcarboranpolysiloxane polymers with a viscosity of 10 up to 10 θ Pa _e a, individually or in a mixture, 1 to 80 parts by weight of silicone oil from the oil metylfenylsilikonový в viscosity 3.10 ^ ^3-10 cps, methyl silicone oil and a viscosity of ³ to 5.10 ** ΙΟ Pa.sa metylchlorfenylsilikonový oil having a viscosity of 10 2 _e '^ _e to 1 Pa s, with the following ingredients: 0 to 10 parts by weight of aliphatic acids having 5 to 30 carbon atoms or their salts, 0 to 10 parts by weight of organic salts, preferably dibutyldilaurate or tin octenate, 0.01 to 30 parts by weight of a powdered glidant; and 1 to 1000 parts by weight of a filler having a maximum specific surface area 200 m ^ / go 2. A composition according to claim 1, wherein the aliphatic acid comprises oleic, erucic, palmitic, stearic or lithium salts of these acids individually or in admixture. 3. A composition according to claim 1 wherein the inorganic tin salt is tin dibutyldilauret or tin octenate. 4. A composition according to claim 1, wherein the lubricated glidant comprises modybindisulfide or graphite. 5. The composition of item 1i, wherein the composition is a bdouaulj imaten.