1、December 2015 English price group 16No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83.060!%Ir5“2387918www.din.deDI
2、N ISO 13226Rubber Standard reference elastomers (SREs) for characterizing the effect of liquids on vulcanized rubbers (ISO 13226:2011),English translation of DIN ISO 13226:2015-12Elastomere Standard-Referenz-Elastomere (SREs) zur Charakterisierung des Verhaltens von Flssigkeiten auf Elastomere (ISO
3、13226:2011),Englische bersetzung von DIN ISO 13226:2015-12Caoutchouc lastomres de rfrence normaliss (SRE) pour la caractrisation de leffet des liquides sur les caoutchoucs vulcaniss (ISO 13226:2011),Traduction anglaise de DIN ISO 13226:2015-12SupersedesDIN ISO 13226:2006-10www.beuth.deDTranslation b
4、y DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 33 pages11.15 A comma is used as the decimal marker. Contents Page National foreword . 3 National Annex NA (informative) Bibliography . 4 Introduction 5 1 Scope . 6 2 Normative re
5、ferences . 6 3 Composition . 7 4 Preparation 7 5 Description . 7 6 Test sheet properties 7 7 Designation . 7 8 Storaz 7 Annex A (normative) Acrylic rubbers: SRE-ACM/1 and SRE-ACM/1X . 8 Annex B (normative) Acrylonitrile-butadiene rubbers: SRE-NBR 28/P and SRE-NBR 28/PX . 10 Annex C (normative) Acryl
6、onitrile-butadiene rubbers: SRE-NBR 28/S, SRE-NBR 28/SX, SRE-NBR 34/S and SRE-NBR 34/SX . 13 Annex D (normative) Acrylonitrile-butadiene rubbers: SRE-NBR/M . 17 Annex E (normative) Acrylonitrile-butadiene rubbers: SRE-NBR/L . 18 Annex F (normative) Chlorobutyl rubbers: SRE-CIIR/1 . 19 Annex G (norma
7、tive) Chloroprene rubbers: SRE-CR/1 20 Annex H (normative) Ethylene-propylene rubbers: SRE-EPM/1 21 Annex I (normative) Fluoropolymer rubbers: SRE-FKM/1 . 22 Annex J (normative) Fluoropolymer rubbers: SRE-FKM/2X 23 Annex K (normative) Hydrogenated acrylonitrile-butadiene rubbers: SRE-HNBR/1 and SRE-
8、HNBR/1X . 26 Annex L (normative) Natural rubbers: SRE-NR/1 30 Annex M (normative) Silicone rubbers: SRE-MQ/1 . 31 Annex N (normative) Silicone rubbers: SRE-VMQ1 and SRE-VMQ/1X 32 DIN ISO 13226:2015-122National foreword This document (ISO 13226:2011) has been prepared by Technical Committee ISO/TC 45
9、 “Rubber and rubber products” (Secretariat: DSM, Malaysia). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-04-34 AA Prfung der physikalischen Eigenschaften von Kautschuk und Elastome
10、ren. The trade names given in this standard represent examples of suitable commercially available products. This is solely intended as information for users of this standard and in no way represents DINs endorsement of the products named. Attention is drawn to the possibility that some of the elemen
11、ts of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. The DIN Standards corresponding to the International Standards referred to in Clause 2 of this standard are as follows: ISO 48 DIN ISO 48 ISO 1817 DIN
12、ISO 1817 ISO 2781 DIN EN ISO 1183-1 ISO 7619-1 DIN ISO 7619-1 ISO 23529 DIN ISO 23529 Amendments This standard differs from DIN ISO 13226:2006-10 as follows: a) for some SREs, the change in volume has been specified as a requirement, and in these cases it supersedes the change in mass. b) the inform
13、ation to be given by the manufacturer has been updated. Previous editions DIN 53538-1: 1981-09, 1992-10 DIN 53538-3: 1981-09, 1992-08 DIN 53538-4: 1988-10 DIN 53538-6: 1993-08 DIN 53538-7: 1995-08 DIN ISO 13226: 2006-10 DIN ISO 13226:2015-123National Annex NA (informative) Bibliography DIN EN ISO 11
14、83-1, Plastics Methods for determining the density of non-cellular plastics Part 1: Immersion method, liquid pyknometer method and titration method DIN ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) DIN ISO 1817, Rubber, vulcanized Deter
15、mination of the effect of liquids DIN ISO 7619-1, Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness) DIN ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods DIN ISO 13226:2015-124In
16、troduction The materials covered by this International Standard are specified in Annexes A to N. The following standard reference elastomers are included: a) Acrylic rubbers: SRE-ACM/1 and SRE-ACM/1X b) Acrylonitrile-butadiene rubbers: SRE-NBR 28/P and SRE-NBR 28/PX SRE-NBR 28/S, SRE-NBR 28/SX, SRE-
17、NBR 34/S and SRE-NBR 34/SX SRE-NBR/M SRE-NBR/L c) Chlorobutyl rubbers: SRE-CIIR/1 d) Chloroprene rubbers: SRE-CR/1 e) Ethylene-propylene rubbers: SRE-EPM/1 f) Fluoropolymer rubbers: SRE-FKM/1 SRE-FKM/2X g) Hydrogenated acrylonitrile-butadiene rubbers: SRE-HNBR/1 and SRE-HNBR/1X h) Natural rubbers: S
18、RE-NR/1 i) Silicone rubbers: SRE-MQ/1 SRE-VMQ/1 and SRE-VMQ/1X Rubber Standard reference elastomers (SREs) for characterizing the effect of liquids on vulcanized rubbers DIN ISO 13226:2015-125WARNING Persons using this International Standard should be familiar with normal laboratory practice. This s
19、tandard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. IMPORTANT Certain procedures specified in this
20、International Standard might involve the use or generation of substances, or the generation of waste, that could constitute a local environmental hazard. Reference should be made to appropriate documentation on safe handling and disposal after use. 1 Scope This International Standard specifies requi
21、rements for vulcanized rubbers in sheet form for use as standards in characterizing the effect of test liquids and service fluids. Details of the individual standard reference elastomers are listed in the annexes. The compounding and preparation ensure that the property profile agrees sufficiently w
22、ith that of the material group represented, while the simple formulation ensures reliable reproducibility. The specified property changes of the SRE when in contact with a fluid under specified conditions may be included as supplementary data in specifications for the fluid concerned. This Internati
23、onal Standard is not designed to provide formulations of elastomeric-product compositions for actual service. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references
24、, the latest edition of the referenced document (including any amendments) applies. ISO 37, Rubber, vulcanized or thermoplastic Determination of tensile stress-strain properties ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 1817, Ru
25、bber, vulcanized or thermoplastic Determination of the effect of liquids ISO 2230, Rubber products Guidelines for storage ISO 2393, Rubber test mixes Preparation, mixing and vulcanization Equipment and procedures ISO 2781:2008, Rubber, vulcanized or thermoplastic Determination of density ISO 7619-1,
26、 Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness) ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods DIN ISO 13226:2015-1263 Composition The materials shall be homogeneous mixes
27、of the ingredients shown in the relevant annex, in the proportions shown, weighed to the accuracy required in ISO 2393. All ingredients shall be of recognized rubber quality. The identification of proprietary materials as suitable ingredients does not exclude the use of other materials that can be s
28、hown to meet the requirements of the standard. If necessary, the quantity of carbon black or silica may be adjusted from one consignment of rubber to another to give properties within the limits specified in the annexes. If the filler content is adjusted, the details shall be declared. 4 Preparation
29、 The mixing of compounds and the vulcanization of test sheets shall be carried out in accordance with ISO 2393 and, where appropriate, as modified by detailed conditions and procedures given in the annexes. If a mould release agent is needed, dry PTFE mould lubricant shall be used. 5 Description The
30、 vulcanized test sheets shall be 2 mm 0,2 mm thick when measured in accordance with ISO 23529, and free from surface defects and internal voids when viewed with normally corrected vision. A “lot” of sheets is those sheets made from a single batch of rubber mix vulcanized under the same conditions. A
31、 “pressing” is the quantity of sheets produced at the same time in a single moulding operation. 6 Test sheet properties The test sheets shall be characterized by one or more physical properties in accordance with the relevant ISO standard test method. Properties and tolerances for individual materia
32、ls are given in the annexes. All sheets shall be tested for compliance with the requirements of Clause 5. A sample sheet from each lot shall be tested for the properties of interest for compliance with the tolerances given in the appropriate annex. The actual values obtained shall be reported. The t
33、est pieces necessary for determining material properties shall be taken from the test sheets in such a way that a minimum distance from the edge of the sheets is maintained. Dumb-bell test pieces shall be taken with their longitudinal axis parallel to the direction of milling of the moulding blank.
34、7 Designation Each elastomer shall be designated as ISO 13226 SRE-A/B where ISO 13226 is this International Standard, SRE is the abbreviation for standard reference elastomer and, after the hyphen, A is a set of code-letters designating the polymer type and B is a descriptor identifying the particul
35、ar compound. Some designations end with the letter X to signify that additional test requirements apply. 8 Storage Test sheets shall be stored in accordance with ISO 2230. After one year, they shall be retested or disposed of. If the sheets still meet the test requirements, they may be stored and us
36、ed for a further year. NOTE The yearly tests apply irrespective of the type of rubber used. DIN ISO 13226:2015-127Annex A (normative) Acrylic rubbers: SRE-ACM/1 and SRE-ACM/1X A.1 Purpose These SREs are representative of ACM materials such as are used, for instance, for parts in contact with petrole
37、um products in the mechanical-engineering and automobile sectors. They are used for the characterization of service fluids such as mineral oils, fuels, lubricants, hydraulic fluids, coolants and refrigerants with regard to their effect on vulcanized acrylic rubbers. The changes in mass, volume, hard
38、ness, tensile strength and elongation at break of the SRE when in contact with the service fluid under specified conditions may be included as supplementary data in specifications for the fluid concerned. A.2 Composition Table A.1 Composition of the SRE Ingredients Parts by mass Acrylic rubberaStear
39、ic acid Pentaerythrite stearatebOctylated diphenylamine (ODPA)cCarbon black, N550 Sodium stearate Quaternary ammonium saltsd100,0 1,0 2,0 2,0 65,0 4,0 2,0 Total 176,0 aHyTemp 4051from Zeon Chemicals L.P., or equivalent. bStruktol WB 222from Schill ISO 13226 SRE-NBR 34/S and SRE-NBR 34/SX (ACN conten
40、t 34 %). The changes in mass, volume, hardness, tensile strength and elongation at break of the SRE when in contact with the service fluid under specified conditions may be included as supplementary data in specifications for the fluid concerned. C.2 Composition Table C.1 Composition of the SRE Ingr
41、edients Parts by mass 28/S28/SX 34/S 34/SX NBR (ACN content 28 %)aNBR (ACN content 34 %)bPolymerized 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ)cZinc oxide, precipitateddStearic acid Carbon black, N550 Tetramethylthiuram disulfide (TMTD)eN-cyclohexylbenzothiazole-2-sulfenamide (CBS)fSulfur 100,0 2,0
42、5,0 1,0 65,0 2,5 1,5 0,2 100,0 2,0 5,0 1,0 65,0 2,5 1,5 0,2 Total 177,2 177,2 aPerbunan NT 2845from Lanxess AG, or equivalent. bPerbunan NT 3445from Lanxess AG, or equivalent. cVulkanox HS/LGfrom Lanxess AG, or equivalent. dZinkoxyd aktivfrom Lanxess AG, or equivalent. eVulkacit Thiuram/Cfrom Lanxes
43、s AG, or equivalent. fVulkacit CZ/Cfrom Lanxess AG, or equivalent. DIN ISO 13226:2015-1213C.3 Recommended mixing procedures Prepare a masterbatch without the TMTD, CBS and sulfur in an internal mixer followed by homogenizing and addition of vulcanizing ingredients on a two-roll mill (see C.6.1). To
44、obtain good sulfur dispersion, use about 10 % of the rubber to make a sulfur masterbatch. Alternatively, mix completely on a two-roll mill. Prepare a sulfur masterbatch and store it for between 30 min and 24 h before proceeding with the main mix (see C.6.2). C.4 Vulcanization Condition the sheeted c
45、ompound at ambient temperature for 2 h to 24 h. Press-cure at 160 C 2 C for 20 min 1 min. C.5 Test sheet properties SRE-NBR 28/S and SRE-NBR 34/S materials shall fulfil the basic property given in Table C.2. Additional properties may be specified (see Table C.3). SRE-NBR 28/SX and SRE-NBR 34/SX mate
46、rials shall fulfil both the basic and the additional properties. Table C.2 Basic property Property Unit Requirement Test method 28/S 28/SX 34/S 34/SX Increase in mass in test liquid B for fuels, as in ISO 1817 % 26 to 29 17 to 20 ISO 1817, three type 2 dumb-bell test piecesaimmersed for 22 h 0,5 h a
47、t 23 C 2 C Test piece/test liquid volume ratio: 1/(30 5) aAs specified in ISO 37. Table C.3 Additional properties in the initial state Property Unit Requirement Test method 28/SX 34/SX Tensile strength Elongation at break MPa % 20 to 25 300 to 400 20 to 25 300 to 400 ISO 37, five type 2 dumb-bell te
48、st pieces Hardness Shore AIRHD 76 to 81 76 to 81 77 to 82 77 to 82 ISO 7619-1, three type 2 dumb-bell test piecesa, three plies ISO 48, three type 2 dumb-bell test piecesa, three plies Density Mg/m31,19 to 1,23 1,20 to 1,24 ISO 2781:2008, method A, three test pieces aAs specified in ISO 37. DIN ISO
49、13226:2015-1214C.6 Mixing procedures The following mixing procedures can be used to produce SRE-NBR 28/SX and SRE-NBR 34/SX materials: C.6.1 Internal mixer and subsequent two-roll mill Use an internal mixer to prepare a masterbatch, without the vulcanizing ingredients, e.g. as specified in Table C.4. Homogenize using a two-roll mill and add the vulcanizing ingredients, e.g. as
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