PL100293B1 - RUBBER BLEND OF SILICONE RUBBER - Google Patents

RUBBER BLEND OF SILICONE RUBBER Download PDF

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PL100293B1
PL100293B1 PL18503075A PL18503075A PL100293B1 PL 100293 B1 PL100293 B1 PL 100293B1 PL 18503075 A PL18503075 A PL 18503075A PL 18503075 A PL18503075 A PL 18503075A PL 100293 B1 PL100293 B1 PL 100293B1
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Poland
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rubber
parts
silicone
weight
blend
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PL18503075A
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Polish (pl)
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Przedmiotem wynalazku jest mieszanka gumowa z kauczuku silikonowego, zawierajaca napelniacze, zmiekczacze i srodki wulkanizujace, której wulka¬ nizatory maja wyzsze wlasnosci mechaniczne od po¬ wszechnie znanych mieszanek na bazie tego rodzaju elastomerów.The invention relates to a rubber compound made of silicone rubber, containing fillers, softeners and vulcanizing agents, the volcano nators have higher mechanical properties than well-known mixtures based on this kind elastomers.

Znane mieszanki gumowe skladaja sie z napelnia- czy w postaci krzemionki koloidalnej, krzemianów cyrkonowych, liptonu, tlenku tytanowego, tlenku cynkowego lub tlenku magnezowego, a w szczegól¬ nych przypadkach wlókna szklanego i azbestu oraz ze zmiekczaczy i srodków wulkanizujacych. Najcze¬ sciej mieszanki silikonowe sporzadza sie z elasto¬ meru metylo-winylo-silikonowego, 2,5 dwu — III rz. -butylo-peroksy — 2,5 dwumetyloheksanu, krze¬ mionki koloidalnej typu Aerosil i tlenku cynkowego, badz tez tlenku magnezu i tlenku tytanowego. Takie mieszanki gumowe z elastomerów silikonowych ma¬ ja niskie wlasnosci mechaniczne, uniemozliwiajace ich stosowanie do wyrobów pracujacych w trudnych warunkach, na przyklad do uszczelnien stosowanych w ruchu posuwisto-zwrotnym lub obrotowym w sro¬ dowisku agresywnym, szczególnie niepalnych cieczy hydraulicznych. Wytrzymalosc wulkanizatu na roz¬ dzieranie jest jedna z wazniejszych wlasnosci me¬ chanicznych oraz stosowaniu wyrobów.Known rubber compounds consist of a filling or in the form of colloidal silica, silicates zirconium, liptone, titanium oxide, oxide zinc or magnesium oxide, in particular other cases of glass fiber and asbestos and with softeners and vulcanizing agents. Most often more often silicone mixtures are made of elastics methyl-vinyl-silicone meromer, 2.5 two - third row -butyl-peroxy-2,5-dimethylhexane, silica Aerosil type colloidal muffin and zinc oxide, or also magnesium oxide and titanium oxide. Such rubber compounds made of silicone elastomers ma¬ I low mechanical properties, preventing their application to products working in difficult conditions conditions, for example applied seals in reciprocating or rotary motion in sro¬ aggressive environment, especially non-flammable liquids hydraulic. Resistance of the vulcanizate to dissolution knitting is one of the most important properties of men chanical and use of products.

Niska wielkosc tego parametru jest w wiekszosci przypadków powodem uszkodzen i niesprawnosci elementów gumowych. Wulkanizaty z mieszanek silikonowych charakteryzuja sie niska wytrzymalo- 2 scia na rozdzieranie. Dla powszechnie stosowanych mieszanek z elastomerów metylo-winylo-silikono- wych uzywanych najczesciej do tego typu wyrobów wartosc tego parametru wynosi od kilku do kilku- nastu kG/cm, podczas gdy inne rodzaje niesilikono- wych elastomerów daja wulkanizaty o wytrzyma¬ losci na rozdzierania rzedu kilkudziesieciu kG/cm.The low magnitude of this parameter is for the most part cases, the cause of damage and malfunctions rubber elements. Compound vulcanizates silicone materials are characterized by low strength 2 tearing. For commonly used mixtures of methyl-vinyl-silicone elastomers most often used for this type of product the value of this parameter ranges from a few to kG / cm, while other types of non-silicone of elastomers are given by vulcanizates of strength fate of tears in the order of several dozen kg / cm.

Celem wynalazku jest uzyskanie wulkanizatorów z kauczuku silikonowego o lepszych wlasnosciach mechanicznych, a w szczególnosci o zwiekszonej wy¬ trzymalosci na rozdzieranie. Cel ten osiagnieto za pomoca mieszanki gumowej zawierajacej znane na¬ pelniacze, zmiekczacze i srodki wulkanizujace oraz policzterofluoroetylen w ilosci od 0,5 do 10, najko- rzystniej 1 do 5 czesci wagowych na 100 czesci wa¬ gowych polimeru.The object of the invention is to obtain vulcanizers made of silicone rubber with better properties mechanical, and in particular with increased performance tear strength. This goal was achieved by by means of a rubber mixture containing known na na fillers, softeners and vulcanizing agents, and polytetrafluoroethylene in an amount from 0.5 to 10, the most More preferably 1 to 5 parts by weight per 100 parts of shaft polymer.

Dodatek policzterofluoroetylenu nieoczekiwanie zwieksza okolo dwukrotnie wytrzymalosc wulkani- tów na rozdzieranie. Wulkanizaty z mieszanek wedlug wynalazku odznaczaja sie niezmienionymi podstawowymi wlasnosciami fizyko-chemicznymi, przy jednoczesnym wzroscie wlasnosci mechani¬ cznych.The addition of polytetrafluoroethylene was unexpectedly doubles the strength of volcanoes tearing. Compound vulcanizates according to the invention, they are not changed basic physico-chemical properties, while increasing the property of the mechanism civic.

Przyklad 1. Do 100 czesci wagowych elasto- meru metylo-winylo-silikonowego dodaje sie 0,4 czesci wagowe 2,5 dwu — III rz. — butylo — pero- ksy — 2,5 dwumetyloheksanu, 50 czesci wagowych krzemionki koloidalnej typu Aerosil, 2 czesci wago¬ we policzterofluoroetylenu i 5 czesci wagowych tlen- ku cynkowego. 100 2933 100 293 4 Przyklad 2. Do 100 czesci wagowych elasto¬ meru metylo-winylo-silikonowego dodaje sie 0,4 czesci wagowe 2,5 dwu-III rz.-butylo-peroksy-2,5 1 i 2 w porównaniu z powszechnie stosowanymi mie¬ szankami gumowymi z kauczuku silikonowego po¬ daje tabela.Example 1. Up to 100 parts by weight of elasto 0.4 is added with methyl vinyl silicone mer parts by weight 2.5 double - third row - butyl - pero- xy - 2.5 dimethylhexane, 50 parts by weight Aerosil type colloidal silica, 2 parts by weight in polytetrafluoroethylene and 5 parts by weight of oxygen towards zinc. 100 2933 100 293 4 Example 2. Up to 100 parts by weight of elasto 0.4 is added with methyl vinyl silicone mer parts by weight 2.5 two-third order -butyl-peroxy-2.5 1 and 2 compared to commonly used mixtures silicone rubber shafts gives the table.

Tabela Porównawcze zestawienie wlasnosci mieszanek gumowych Sklad mieszanki A. mieszanka znana: 100 cz. wag. elastomeru me¬ tylo-winylo-silikonowego 0,4 cz. wag. 2,5 dwu-III rz. bu- tylo-peroksy-2,5 dwumety- lo-heksanu + 50 cz. wag. krzemionki koloidalnej ty¬ pu Aerosil + 50 cz. wag. tlenku cynkowego. mieszanka wg przykladu 1: powyzsza mieszanka „A" + 2 cz. wag. policztero- fluoroetylenu B. mieszanka znana: 100 cz. wag. elastomeru me¬ tylo-winylo-silikonowego + 0,4 cz. wag. 2,5 dwu-III rz.- -butylo-peroksy-2,5 dwume- tyloheksanu + 50 cz. krze¬ mionki koloidalnej typu Aerosil + 4 cz. wag. tlenku magnezu, 5 cz. wag. tlenku tytanowego mieszanka wedlug przykladu 2: powyzsza mieszanka „B" + 5 cz. wag. policztero- | fluoroetylenu Wytrzy¬ malosc na rozrywanie kG/cm* 70 84 81 95 Wydluzenie wzgledne przy zerwaniu % 130 145 220 215 'l Rozdzier- nosc kG/cm 13,0 ,7 14,0 ,1 Odksztal¬ cenie trwale po zerwaniu % 1,3 1,8 1,2 1,7 Zmiany po starzeniu w 100°C 24h w Reo- | lube HYD 110 w % masy/ 3,5 3,4 3,5 2,6 objetosci ,5 ,4 ,0 4,9 dwumetyloheksanu, 5 czesci wagowych krzemionki koloidalnej typu Aerosil, 5 czesci wagowych poli- czterofluoroetylenu, 4 czesci wagowe tlenku magne¬ zu i 5 czesci wagowych tlenku tytanowego.Table Comparative list of properties of rubber compounds Composition of the mixture A. mixture known: 100 pcs. wt. elastomer metric Tylo-vinyl-silicone 0.4 part wt. 2.5 two-third row bu- tylo-peroxy-2,5 dimety- lo-hexane + 50 parts wt. colloidal silica, such as pu Aerosil + 50 pcs. wt. zinc oxide. mixture according to example 1: the above mixture "A" + 2 pcs. wt. polyther- fluoroethylene B. known mixture: 100 pcs. wt. elastomer metric tylo vinyl silicone + 0.4 parts wt. 2.5 two-third row - -butyl-peroxy-2,5 dimm- tylohexane + 50 parts silence type colloidal muon Aerosil + 4 pcs. wt. oxide magnesium, 5 parts wt. oxide titanium mix by example 2: the above mixture "B" + 5 pcs. wt. polyther- | fluoroethylene Hold littleness on tearing kG / cm * 70 84 81 95 Elongation relative at breaking up % 130 145 220 215 'l Tear- nosc kg / cm 13.0 , 7 14.0 , 1 Deform I appreciate permanently after breaking up % 1.3 1.8 1.2 1.7 Changes after aging at 100 ° C 24h in Reo- | lube HYD 110 in% masses / 3.5 3.4 3.5 2.6 volumes , 5 , 4 , 0 4.9 dimethylhexane, 5 parts by weight of silica colloidal type Aerosil, 5 parts by weight of polyurethane tetrafluoroethylene, 4 parts by weight of magnesium oxide zu and 5 parts by weight of titanium oxide.

Podstawowe wlasnosci wytrzymalosciowe oraz wplyw trudno palnych cieczy hydraulicznych na mieszanki gumowe otrzymane wedlug przykladów 45 50Basic strength properties as well effect of non-flammable hydraulic fluids on rubber mixtures obtained according to the examples 45 50

Claims (1)

1. Zastrzezenie patentowe Mieszanka gurr^wa z kauczuku silikonowego za¬ wierajaca napeln^acze, zmiekczacze, srodki wulkani¬ zujace, znamienna tym, ze zawiera policzterofluoro- etylen w ilosci od 0,5 do 10, najkorzystniej 1 do 5 czesci wagowych na 100 czesci wagowych polimeru. PZG Bydg., zam. 184/79, nakl. 105+20 Cena 45 zl1. Patent claim A silicone rubber mixture containing fillers, softeners, and vulcanizing agents, characterized in that it contains polytetrafluoroethylene in an amount from 0.5 to 10, preferably 1 to 5 parts by weight per 100 parts by weight of the polymer. PZG Bydgoszcz, residing in 184/79, nakl. 105 + 20 Price PLN 45
PL18503075A 1975-11-25 1975-11-25 RUBBER BLEND OF SILICONE RUBBER PL100293B1 (en)

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