GB/T 46327-2025Neodymium-catalysed butadiene rubber (English PDF)
钕系丁二烯橡胶
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 5, 2025
Implementation date
May 1, 2026
Scope
GB/T 46327-2025 is the English-translated version of 钕系丁二烯橡胶.
GB/T 46327-2025 is the Chinese national standard covering the neodymium-catalysed polybutadiene — the very high cis content that the rare earth catalyst gives and the low branching that comes with it, the Mooney viscosity, the volatiles and ash, and the properties that make it the rubber of choice for a tyre sidewall.
First edition, in force from 1 May 2026. Issued on 5 October 2025, it has been in force since 1 May 2026.
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Document preview — GB/T 46327-2025
National Standard of the People's Republic of China
- ICS
- 83.060
- Classification
- G 35
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Product Brands
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Rubber and Rubber Products (SAC/TC35).
This document was drafted by: Dushanzi Petrochemical Branch of China National Petroleum Corporation (CNPC) and China National Petroleum Corporation (CNPC).
Research Institute of Petrochemical Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Beijing Yanshan Branch of China Petroleum & Chemical Corporation, China PetroChina Sichuan Petrochemical Co., Ltd., China National Petroleum Corporation Jinzhou Petrochemical Branch, and Zhejiang Transfar Synthetic Materials Co., Ltd.
Limited Liability Company, Zhongce Rubber Group Co., Ltd., Sailun (Dongying) Tire Co., Ltd., Double Coin Group (Xinjiang) Kunlun Tire Co., Ltd. company.
The main drafters of this document are: Zhan Xuqin, Li Ji, Cong Rixin, Dong Zhijun, Hu Bin, Bi Jifu, Yu Hongguang, Gou Ke, Li Chuangguang, and Yang Guangming.
Du Yang, Wang Shining, Wang Danling, Wang Kun, Zhou Junjie, Yang Changhui, Dong Jing, Zhang Zhongming, Yang Liang, Liu Yuliang, Li Qiang, Wen Jiahui. Neodymium butadiene rubber
1 Scope
This document specifies the product grades, technical requirements, inspection rules, marking and accompanying documents, packaging, transportation and storage of neodymium butadiene rubber.
The document describes the corresponding test methods for the technical specifications.
This document applies to high cis polybutadiene rubber prepared by solution polymerization of 1,3-butadiene in a neodymium-based catalyst system.
2 Normative references
GB/T 528-2009
GB/T 1232.1
GB/T 4498.1-2025
GB/T 5577
GB/T 8660-2018
GB/T 9869.3
GB/T 15340
GB/T 19187
GB/T 19188
GB/T 24131.1-2018
GB/T 24131.2
GB/T 24797.1
3 Terms and Definitions
This document does not contain any terms or definitions that need to be defined.
4 Product Brands
Neodymium butadiene rubber product grades should comply with the provisions of GB/T 5577.The product grades specified in this document are consistent with the original brands of some manufacturers.
See Appendix A for the corresponding information for the number.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 528-2009Rubber, vulcanized or thermoplastic -- Determination of tensile stress-strain properties
- GB/T 1232.1Rubber, unvulcanized -- Determinations using a shearing-disc viscometer -- Part 1: Determination of Mooney viscosity
- GB/T 4498.1-2025Rubber - Determination of ash - Part 1: Muffle furnace method
- GB/T 5577Specification for the codification of synthetic rubber
- GB/T 8660-2018Solution polymerized butadiene rubber (BR) -- Evaluation procedures
- GB/T 9869.3Rubber - Measurement of vulcanization characteristics using curemeters - Part 3: Rotorless curemeter
Editions of GB/T 46327
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 46327-2025 | Neodymium-catalysed butadiene rubber | current edition | Current |
This page sells the current edition, GB/T 46327-2025. Earlier editions are listed for reference only.
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Related Standards
GB/T 1232.1-2016 — Rubber, unvulcanized -- Determinations using a shearing-disc viscometer -- Part 1: Determination of Mooney viscosity
GB/T 15340-2025 — Rubber, raw natural and raw synthetic - Sampling and further preparative procedures
GB/T 19187-2016 — Sampling procedures for inspection of raw synthetic rubber
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