GB/T 8655-2019Styrene-butadiene rubber (SBR)1500, 1502 (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 8655-2006 "Styrene-butadiene rubber (SBR) 1500" and GB/T 12824-2002 "Rubber, styrene-butadiene (SBR) 1502".

Compared with GB/T 8655-2006, in addition to editorial modifications, main technical changes as follows:

- modified application scope (see Clause 1 of this Edition, Clause 1 of GB/T 8655-2006);

- about normative references, this Standard made adjustment according to current latest version; see Clause 2 "Normative references" for adjustment as follows:

- modified all normative refences to current latest version;

- deleted GB/T 6737-1997;

- added GB/T 24131.1-2018, GB/T 24797.1-2009, GB/T 25268-2010;

- modified GB/T 19188 from date reference to non-date reference;

- modified technical requirements (see Table 1 of this Edition, Table 1 of GB/T 8655-2006);

- modified inspection rules (see Clause 4 of this Edition, Clause 4 of GB/T 8655-2006);

- added marks and accompanying documents (see Clause 5 of this Edition);

- modified packaging, marks, transport and storage (see Clause 6 of this Edition, Clause 5 of GB/T 8655-2006).

Compared with GB/T 12824-2002, in addition to editorial modifications, main technical changes in this Standard are as follows:

- modified applicable scope (see Clause 1 of this Edition, Clause 1 of GB/T 12824-2002);

- about normative references, this Standard made adjustment according to current latest version; see Clause 2 "Normative references" for adjustment as follows: […]

1 Scope

This Standard specifies requirements and test methods, inspection rules, marks, packaging, transport and storage for styrene-butadiene rubber (SBR) 1500,1502 [i.e., styrene-butadiene rubber, hereinafter referred to as styrene-butadiene rubber (SBR) 1500, 1502].

This Standard is applicable to styrene-butadiene rubber (SBR) 1500 and styrene-butadiene rubber (SBR) 1502 that take butadiene and styrene as monomers, compound soap of potassium rosin acid soap and fatty acid soap, or disproportionated potassium rosin soap as emulsifier, that is produced through low-temperature emulsion polymerization, where styrene-butadiene rubber (SBR) 1500 adds color-changing anti-aging agent and styrene-butadiene rubber (SBR) 1502 adds color non-discoloring anti-aging agent.

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, the latest edition of the referenced document (including any amendments) applies.

GB/T 528-2009, Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties

GB/T 1232.1-2016, Rubber, unvulcanized - Determinations using a shearing-disc viscometer - Part 1: Determination of Mooney viscosity

GB/T 4498.1-2013, Rubber - Determination of Ash - Part 1: Muffle Furnace Method

GB/T 8656-2018, Emulsion-and solution-polymerized styrene-butadiene rubber (SBR) - Evaluation procedures

GB/T 8657-2014, Styrene-butadiene rubber, raw - Determination of soap and organic-acid content

GB/T 8658-1998, Rubber, raw styrene-butadiene, emulsion - Polymerized - Determination of bound styrene content-Refractive index method

GB/T 19187-2016, Sampling procedures for inspection of raw synthetic

4 Inspection rules

All items in Table 1 are type inspection items. Under normal circumstances, mixed-refining rubber Mooney viscosity, 300% fixed stress, tensile strength, elongation at break and vulcanization characteristics are tested at least once a week. Ash content is subjected to type inspection at least once a month.

Exit-factory inspection items for styrene-butadiene rubber (SBR) 1500, 1502 are volatile content, organic acid, soap, combined styrene, raw rubber Mooney viscosity.

5 Marks and accompanying documents

5.1 On external packaging of styrene-butadiene rubber (SBR) 1500, 1502, there shall be obvious mark. Mark contents may include product name, designation, name of production plant, plant address, registered trademark, batch number (production date), net content. […]