ICS 83.060 CCS G 35 T/CSTM 00538 E—2021 Liquid acrylonitrile -butadiene rubber 液体丙烯腈 -丁二烯橡胶 (English Translation) Issue d by Chinese Society for Testing & Materials, Zhongguancun Issue date: 2023-01-13 Implementation date : 2023-04-13 CSTMhQÆSÑ^Ou( 全国团体标准信息平台 T/CSTM 00538E —2021 Foreword CSTM /FC05/TC0 2 (The rubber and rubber products technical committee of chemical materials field committee of Chinese Society for Testing & Materials) is in charge of this English translation. In case of any doubt about the contents of English translation, the Chinese original shall be considered authoritative. This document is drafted in accordance with the rules given in the GB/T 1.1 —2020 Directives for standardization — Part 1: Rules for the structure and draftin g of standardizing documents . Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent right s. This document was proposed by Field Committee CSTM/FC05, Chemical materials . This document was prepared by Field Committee CSTM /FC05 , Chemical materials , Technical committee TC0 2, Rubber and rubber products . CSTMhQÆSÑ^Ou( 全国团体标准信息平台 T/CSTM 00538E —2021 Liquid acrylonitrile -butadiene rubber 1 Scope This document specifies the requirements and inspection rules of liquid acrylonitrile -butadiene rubber (L -NBR); describes the corresponding test methods; and also specifies the items on packaging, marking, transportation and storage. This document is applicable to L -NBR synthesized by emulsion polymerization process using butadiene and acrylonitrile as monomers. 2 Normative references The f ollowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 1632.1 , Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part1: General principles GB/T 4498.1 —2013 , Rubber — Determination of ash — Part 1: Muffle furnace method GB/T 8170 —2008, Rules of rounding off f or numerical values and expression and judgement of limiting values GB/T 24131.1 —2018, Rubber, raw — Determination of volatile matter content — Part 1: Hot -mill method and oven method SH/T 1149, Synthetic rubber latex — Sampling SH/T 1157.1, Rubber, raw — Determination of bound acrylonitrile content in acrylonitrile -butadiene rubber (NBR) — Part 1: Combustion (Dumas) method SH/T 1157.2, Rubber, raw — Determination of bound acrylonitrile content in acrylonitrile -butadiene rubber (NBR) — Part2: Kjeldahl metho d 3 Term and definitions No terms and definitions are listed in this document. 4 Requirements 4.1 Appearance L-NBR is light yellow or brown viscous liquid. 4.2 Technical requirements The technical requirements of L-NBR shall be as specified in Table 1. CSTMhQÆSÑ^Ou(全国团体标准信息平台