CS235193B1 - Stabilization composition for vulcanizates - Google Patents
Stabilization composition for vulcanizates Download PDFInfo
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- CS235193B1 CS235193B1 CS47484A CS47484A CS235193B1 CS 235193 B1 CS235193 B1 CS 235193B1 CS 47484 A CS47484 A CS 47484A CS 47484 A CS47484 A CS 47484A CS 235193 B1 CS235193 B1 CS 235193B1
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- vulcanizates
- composition
- mercaptobenzimidazole
- parts
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- 239000000203 mixture Substances 0.000 title claims description 29
- 230000006641 stabilisation Effects 0.000 title description 8
- 238000011105 stabilization Methods 0.000 title description 8
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 claims description 13
- 229920003052 natural elastomer Polymers 0.000 claims description 6
- 229920001194 natural rubber Polymers 0.000 claims description 6
- -1 α-methylbenzyl Chemical group 0.000 claims description 4
- WYZIVNCBUWDCOZ-UHFFFAOYSA-N 2-(1-phenylethyl)phenol Chemical compound C=1C=CC=C(O)C=1C(C)C1=CC=CC=C1 WYZIVNCBUWDCOZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920003051 synthetic elastomer Polymers 0.000 claims description 3
- 239000005061 synthetic rubber Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 description 12
- 230000000087 stabilizing effect Effects 0.000 description 12
- 230000032683 aging Effects 0.000 description 11
- 229920001971 elastomer Polymers 0.000 description 7
- 239000005060 rubber Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000010410 dusting Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- ZYSDQISYXRYGMK-UHFFFAOYSA-N n-phenyl-n-(1-phenylethyl)aniline Chemical compound C=1C=CC=CC=1C(C)N(C=1C=CC=CC=1)C1=CC=CC=C1 ZYSDQISYXRYGMK-UHFFFAOYSA-N 0.000 description 3
- 150000002989 phenols Chemical class 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 241000063973 Mattia Species 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- KSAPYRIVHFAQGR-UHFFFAOYSA-N 1-sulfanylbenzimidazole Chemical compound C1=CC=C2N(S)C=NC2=C1 KSAPYRIVHFAQGR-UHFFFAOYSA-N 0.000 description 1
- WJQOZHYUIDYNHM-UHFFFAOYSA-N 2-tert-Butylphenol Chemical compound CC(C)(C)C1=CC=CC=C1O WJQOZHYUIDYNHM-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000021168 barbecue Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- FQUNFJULCYSSOP-UHFFFAOYSA-N bisoctrizole Chemical compound N1=C2C=CC=CC2=NN1C1=CC(C(C)(C)CC(C)(C)C)=CC(CC=2C(=C(C=C(C=2)C(C)(C)CC(C)(C)C)N2N=C3C=CC=CC3=N2)O)=C1O FQUNFJULCYSSOP-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- LRCFXGAMWKDGLA-UHFFFAOYSA-N dioxosilane;hydrate Chemical compound O.O=[Si]=O LRCFXGAMWKDGLA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PEZGVBGVIASDQE-UHFFFAOYSA-N ethene;thiourea Chemical compound C=C.C=C.NC(N)=S PEZGVBGVIASDQE-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 150000002357 guanidines Chemical class 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229960004029 silicic acid Drugs 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003557 thiazoles Chemical class 0.000 description 1
- 150000003585 thioureas Chemical class 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
Vynález sa týká stabilizačně]' kompozície pre vulkanizáty z prírodného a/alebo syntetických kaučukov obsahujúcej a-metylbenzyldifenylamín, «-metylbenzylfenol, 2-merkaptobenzimidazol.The invention relates to a stabilizing composition for vulcanizates of natural and / or synthetic rubbers comprising α-methylbenzyldiphenylamine, n-methylbenzylphenol, 2-mercaptobenzimidazole.
V súčasnosti sa rieši požiadavka vysokej termooxidačnej stability vulkanizátov z prírodného a/alebo syntetických kaučukov, pri zachovaní ich svetlostálosti, používáním antidegradantov najmá zo skupiny fenolov. Najúčinnejšie sú deriváty viac jaderných fenolov. Napriek vysokej stabilizačnej účinnosti týchto zlúčenín je však ich používanie limitované obmedzenou dostupnosťou. Schodnejšou cestou k dosiahnutiu zlepšenej termooxidačnej stability vulkanizátov a tým aj životnosti výrobkov, je využitie synergického efektu niektorých zmesi stabilizátorov. Tak například Čs. AO 165 480 je chráněná kombinácia aralkylfenolu a 2-merkaptobenzimidazolu.The need for high thermo-oxidative stability of vulcanizates from natural and / or synthetic rubbers, while maintaining their lightfastness, is currently being addressed by the use of antidegradants, in particular from the phenol group. More nuclear phenol derivatives are most effective. However, despite the high stabilizing activity of these compounds, their use is limited by limited availability. A more viable way to achieve improved thermo-oxidative stability of the vulcanizates and thus product durability is to utilize the synergistic effect of some stabilizer mixtures. For example, Cs. AO 165 480 is a protected combination of aralkylphenol and 2-mercaptobenzimidazole.
Od danej přísady sa naviac vyžaduje aj dobrá spracovateínosť a solidná skladovatelnosť, nakolko súčasné požiadavky na hygienu práce a bezproblémová manipuláciu s produktom sú stále vyššie.In addition, good workability and solid shelf life are required from the additive, as the current requirements for work hygiene and trouble-free product handling are increasing.
Uvedené nároky spíňa stabilizačná kompozícia pre vulkanizáty z prírodného a/alebo SyntfitiGfeýCtl toňGúkov na báze «-metylbenzylfenolu a 2-merkaptobenzimidazolu podía vynálezu.The aforementioned claims are based on a stabilizing composition for the vulcanizates of natural and / or synthetic sulfonates based on N-methylbenzylphenol and 2-mercaptobenzimidazole according to the invention.
Podstata vynálezu spočívá v tom, že stabilizačná kompozícia obsahuje 30 až 65 % hmot. «-metylbenzyldifenylamínu všeobecného vzorca I.The stabilizing composition comprises 30 to 65 wt. N-methylbenzyldiphenylamine of formula I.
ll) v ktorom(ll) in which:
R znamená vodík alebo α-metylbenzyl a n znamená celé číslo 1 až 3 a 15 až 40 % 15 až 35 % ihmot. a-metylbenzylfenolu vzorca II.R is hydrogen or α-methylbenzyl and n is an integer of 1 to 3 and 15 to 40% 15 to 35% ihmot. of α-methylbenzylphenol of formula II.
(II) v ktorom n znamená celé číslo 1 až 3 a 15 až 40 °/o hmot. 2-merkaptobenzimidazolu vzorca III(II) wherein n is an integer of 1 to 3 and 15 to 40% by weight of the composition; 2-mercaptobenzimidazole of formula III
Zistilo sa tiež, že stabilizačná kompozícia móže byť upravená vhodným inertným plnidlom (například hydratovaným kysličníkem křemičitým) s obsahom 40 až 70 °/o hmot. účinnej látky.It has also been found that the stabilizing composition can be treated with a suitable inert filler (e.g. hydrated silica) containing 40 to 70% by weight of the composition. of the active substance.
Ďalej sa zistilo, že takto upravená stabilizačná zmes sa móže pridať ku kaučukovej zmesi v množstve 0,5 až 5,0 hmot. dielov s výhodou 1,0 až 3,0 hmot. dielov na 100 hmot. d ..Ίοv kaučuku.Furthermore, it has been found that the stabilizer mixture so treated can be added to the rubber mixture in an amount of 0.5 to 5.0 wt. preferably 1.0 to 3.0 wt. parts per 100 wt. d ..Ίοv rubber.
Stabilizačná kompozícia sa používá spolu s běžnými urýchlovačmi vulkanizácie, ako sú například guanidíny, tiazoly, tiurány, ditlokarbamáty, deriváty tiomočoviny a pod.The stabilizing composition is used in conjunction with conventional vulcanization accelerators, such as guanidines, thiazoles, thiuranes, ditocarbamates, thiourea derivatives, and the like.
Použitie stabilizačnej kompozície podlá vynálezu má mnohé výhody. Vzhladom na to, že ide o pevnú látku a navýše v neprášivej úpravě, možno využit pre přípravu surových kaučukových zmesi polo- alebo plnoautomatické navažovanie, čo podstatné zlepšuje hygienu pracovného prostredia.The use of the stabilizing composition of the invention has many advantages. As a solid and, moreover, in a non-dusting treatment, semi-automatic or fully automatic weighing can be used to prepare the raw rubber mixtures, which substantially improves the hygiene of the working environment.
Nakolko stabilizačná kompozícia podlá vynálezu vykazuje vyššie antioxidačné účinky ako skór používaná binárna kombinácia a podstatné vyššie, ako pri použití samotných zložiek, získajú sa jej aplikáciou vulkanizáty so zvýšenou odolnosťou proti termooxidačnému stárnutiu.Since the stabilizing composition of the present invention exhibits higher antioxidant effects than the binary combination used earlier and substantially higher than the components alone, vulcanizates with increased resistance to thermo-oxidative aging are obtained by its application.
Z hladiska praktického uplatnenia je možné připravit zmesný stabilizátor, spolu s inertným nosičom, v práškovej formě a neprášivej úpravě, ktorý je podstatné efektivnější ako používaná binárna kombinácia, respektive už spomínané bisfenoly.From a practical point of view, it is possible to prepare a mixed stabilizer, together with an inert carrier, in powder form and in a non-dusting treatment, which is substantially more effective than the binary combination or bisphenols mentioned above.
Kompozícia stabilizátorov samotná, popřípadě s dalším antidegradentom, sa zpracovává do kaučukovej zmesi běžnými spracovatefskými postupmi ako iné přísady.The stabilizer composition alone, optionally with an additional antidegradent, is formulated into the rubber mixture by conventional processing procedures as other additives.
Vlastnosti surových zmesi a vulkanizátov bolí sledované a hodnotená běžnými testami, používanými v technologii kaučuku a gumy.The properties of the raw mixtures and vulcanizates have been observed and evaluated by conventional tests used in rubber and rubber technology.
Ďalej uvádzané příklady ilustrujú predmet vynálezu.The following examples illustrate the invention.
Příklad 1Example 1
Vulkanizát z prírodného kaučuku podlá nasledujúcej receptúry:Natural rubber vulcanizate according to the following recipe:
dielov dielov dielov dielov dielov dielov dielov a obsahujúci vždy 2,0 hmotnostně diely antidegradantu bol připravený lisováním do optima pri 145 °C.parts by parts parts by parts parts by parts and each containing 2.0 parts by weight of antidegradant was prepared by pressing to the optimum at 145 ° C.
Vulkanizačné charakteristiky surových zmesi, ktoré sa sledovali podlá metodiky fy MONSANTO pri 145 °C, neboli prídavkom kompozície stabilizátorov ovplyvnené.The vulcanization characteristics of the raw mixtures, which were monitored according to the MONSANTO methodology at 145 ° C, were not affected by the addition of the stabilizer composition.
Priebeh stárnutia vulkanizátov sa sledoval na základe změny základných fyzikálno-mechanických vlastností, ako sú modul 300 °/o, pevnost v tahu, tažnost a pod., po stárnutí v horúcom vzduchu pri 90 °C metódou skúmavkového stárnutia podlá GEER-a a (ČSN 62 15 21) po dobu 1, 3, 5 dní.The aging of the vulcanizates was monitored on the basis of a change in the basic physical-mechanical properties, such as modulus 300 ° / o, tensile strength, elongation, etc., after aging in hot air at 90 ° C by the tube aging method according to GEER. 62 15 21) for 1, 3, 5 days.
Nadobudnuté výsledky sú zhrnuté v tabulke vo formě závislosti změny pevnosti od doby stárnutia (pevnost tahu je pri stárnutí prírodného kaučuku kritickou veličinou — v priebehu stárnutia sa najviacej mění.). Stabilizačný systém (hmot. diely na 100 hmotn. dielov kaučukuThe results obtained are summarized in the table in the form of the dependence of the change in strength versus aging time (tensile strength is a critical factor in the aging of natural rubber - it changes most during aging). Stabilization system (parts by weight per 100 parts by weight of rubber
Účinnost stabilizačných systémov, vyjádřené pevnosťou v tahu po stárnutí pri 90 °CEfficiency of stabilization systems, expressed as tensile strength after aging at 90 ° C
Para- Stabilizačný systém meter — 1 234567Para- Stabilization system meter - 1 234567
Tabulka č. 1 zvyšková pevnost po stárnutí (%)Table no. 1 residual strength after aging (%)
Stabilizačný systém, obsahujúci stabilizačnú kompozicím porlla vynálezu, je súčasne aj najefektívnejší, pretože představuje aj ekonomicky nevýhodnejšiu kombináciu jednotlivých zložiek.The stabilizing system comprising the stabilizing compositions according to the invention is at the same time the most effective as it also represents the economically disadvantageous combination of the individual components.
Praktickým využitím vyšeuvedených výsledkov je zmesný stabilizátor v práškovej formě a neprášivej úpravě, připravený na základe kombinácie stabilizátorov podía vzorcov (lj až (III), uvedených v úvode:A practical use of the above results is a mixed stabilizer in powder form and a non-dusting treatment, prepared on the basis of a combination of stabilizers according to the formulas (Ij to (III)), introduced at the beginning:
37.5 % hmotnostných a-metylbenzyldifenylamín37.5% by weight of α-methylbenzyldiphenylamine
12.5 % hmotnostných «-merkaptobenzimidazol12.5% by weight of N-mercaptobenzimidazole
12.5 % hmotnostných a-metylbenzylfenol12.5% by weight of α-methylbenzylphenol
37.5 % hmotnostných hydratovaný kysl. křemičitý37.5% hydrated acid. silica
Příklad 2Example 2
Stabilizačná kompozícia, zloženie ktorej je uvedené na konci příkladu 1, tvořené zmesou podía vynálezu, přidaná v koncentrácií 1,5 hmotnostných dielov do zinesi podía receptury z příkladu 1, chráni vulkanizát účinnejšie ako zmesný stabilizátor na báze binárnej kombinácie antidegradantov a účinkami sa vyrovná bisíenolu.The stabilizing composition shown at the end of Example 1, consisting of a composition of the invention, added at a concentration of 1.5 parts by weight to the formulation of Example 1, protects the vulcanizate more effectively than a binary combination antidegradant stabilizer and is equal to bisenenol.
Stabilizačný systémStabilization system
8. 2,2‘-metylén-bis(4-metyl,6-terc.butylfenol)8. 2,2‘-methylene-bis (4-methyl, 6-tert-butylphenol)
9. zmesný stabilizátor, pozostávajúci z 49 percent hmotnostných aralkylovaného fenolu, 21 % hmotnostných 2-merkaptobenzimidazolu s 30 % inertného kysl. křemičitého9. A mixed stabilizer consisting of 49 weight percent aralkylated phenol, 21 weight percent 2-mercaptobenzimidazole with 30 weight percent inert acid. silica
10. stabilizačná kompozícia, zloženie ktorej je uvedené na konci příkladu 110. A stabilizing composition, the composition of which is given at the end of Example 1
Tabulka č. 2Table no. 2
Fyzikálno-mechanické vlastnosti vulkanizátov po stárnutí, GEER 90 °CPhysical-mechanical properties of vulcanizates after aging, GEER 90 ° C
Parameterparameter
Stabilizačný systémStabilization system
9 109 10
Vulkanizát, obsahujúci predmetnú stabilizační! kompozíciu, so stupňom zafarbenia nadobunutým po expozícii pod zdrojom UV, žiarenie, neodlišuje od stupňa zafarbenia nechráněného vulkanizátu, pričom súčasne zabraňuje tvorbě „crazing efektu“.A vulcanizate containing the said stabilizing agent. the composition, with the degree of coloration acquired after exposure to a UV source, radiation does not distinguish from the degree of coloration of the unprotected vulcanizate, while at the same time preventing the formation of a "crazing effect".
Příklad 3Example 3
Vulkanizát z chlóroprénového kaučuku podlá receptury:Chloroprene rubber vulcanizate according to the recipe:
hmotu, dielymass, parts
3 5 19 a obsahujúci vždy 2,5 hmotnostně diely stabilizátoru, bol připravený lisováním do optima pri 160 °C.3 19 and containing in each case 2.5 parts by weight of a stabilizer, was prepared by pressing to the optimum at 160 ° C.
Použitý stabilizačný systémStabilization system used
11. 4,4‘-tiobis(6-terc.butyl,3-metylfenolj11. 4,4‘-Thiobis (6-tert-butyl, 3-methylphenol)
12. zmesný stabilizátor, pozostávajúci z 49 % hmotnostných aralkylovaného fenolu, 21 °/o hmotnostných 2-merkaptobenzimidazolu a 30 % hmotnostných inertného kysl. křemičitého12. Mixed stabilizer consisting of 49% by weight of aralkylated phenol, 21% by weight of 2-mercaptobenzimidazole and 30% by weight of inert acid. silica
13. Stahilizačná kompozícia, ktorej zloženie je uvedené na konci příkladu 113. A composition according to the invention at the end of Example 1
Tabulka č. 3Table no. 3
Vlastnosti vulkanizátov, obsahujúcich rožne stabilizované systémyProperties of vulcanizates containing barbecue stabilized systems
Parameter Stabilizačný systém — 11 12 13 zvyšková tažnosť (%) expozícia 120 °CParameter Stabilization system - 11 12 13 residual elongation (%) exposure 120 ° C
Vulkanizát, obsahujúci predmetnú slabili- neodlišuje od stupňa zafarbenia nechránenézačnú kompozíciu, sa stupňom zafarbenia ho vuikanizátu.The vulcanizate containing the subject weakly does not differ from the degree of coloring of the unprotected composition, with the degree of coloring of the vulcanizate.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS47484A CS235193B1 (en) | 1984-01-20 | 1984-01-20 | Stabilization composition for vulcanizates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS47484A CS235193B1 (en) | 1984-01-20 | 1984-01-20 | Stabilization composition for vulcanizates |
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| Publication Number | Publication Date |
|---|---|
| CS235193B1 true CS235193B1 (en) | 1985-05-15 |
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ID=5336895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS47484A CS235193B1 (en) | 1984-01-20 | 1984-01-20 | Stabilization composition for vulcanizates |
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| Country | Link |
|---|---|
| CS (1) | CS235193B1 (en) |
-
1984
- 1984-01-20 CS CS47484A patent/CS235193B1/en unknown
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