This standard specifies the technical requirements, test methods, inspection rules, packaging, marking, storage, transportation and other requirements for styrene-butadiene rubber (SBR) 1500. This standard applies to SBR 1500 produced by low-temperature emulsion polymerization using butadiene and styrene monomer as the main raw materials, potassium rosinate soap or its mixed soap as the emulsifier. GB 8655-1988 Styrene-butadiene rubber (SBR) 1500 GB8655-1988 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Styrene-butadiene rubber (SBR) 1500
Rubber +styrene-butadiene(SBR) 15001 Question content and scope of application
GB8655—88
This standard specifies the technical requirements, test methods, inspection rules, packaging, marking, storage, transportation and other requirements for industrial styrene rubber (SBR) 1500.
This standard applies to SBR1500 produced by low-temperature emulsion polymerization using butadiene and styrene monomer as the main raw materials, potassium rosinate soap or its mixed soap as the emulsifier.
2
Quoted standards
GB/T1232 Determination of rubber viscosity (using Mooney viscometer) GB6734 Sampling of synthetic raw rubber in packages
Synthetic rubber sample preparation| |tt||GB6735
GB/T6736 Determination of total ash content of synthetic raw rubber GB/T 6737
Determination of volatile content of synthetic raw rubber
GB/T8656 Emulsion polymerized rubber Evaluation of styrene rubber (SBR) test formula and vulcanization characteristics GB/T8657 Determination of soap and organic acid content in styrene-butadiene raw rubber GB/T8658 Determination of bound styrene content in styrene-butadiene raw rubber Refractive index method
3 technology Requirements and test methods
3.1 Appearance: SBR1500 is a polluted block glue, which does not contain coked particles, sediment, mechanical impurities, etc. 3.2 The technical requirements and test methods of SBR1500 are listed in Table 1. Table 1 SBR1500 technical requirements and test method items
Volatile content, %
Total ash, %
Organic acid, %
Soap, shrimp
Combined benzene Artene+%
Mooney viscosity of raw rubber ML1S
Mesh
Mixed rubber Mooney viscosity MI.19
Approved by Sinopec Corporation on 1988-01-15 1 | | tt | ||1.50
Qualified product
1.30
1.50
15.00~7.25
5. 00~7. 25 ↓ 5. 00~7. 25
0.50
22.5~24.5
46~58
85
0.50
22.5~24.5
45~59
85
0.50
22.5~24.5
44~60
85
Test method
CB/T6737A method
GB/T6736
GB/T 8657
GB/T8657
GB/T 8658
GB/T1232
GB/T1232
GB/T 8656
Implemented on 1988-12-01
item
300% tensile stress, MPa
Tensile strength, MPa|| tt||Elongation, %
25min
35min
50min
35min
35min
GB8655-88||tt| |Continued Table 1
refers to
excellent products
7. 1~11. 6
11.315.8
13. 2~17.7|| tt||≥22.1
≥480
standard
first-class product
5.9-~11.8
qualified product
10.3~16.2
9.8-~16. 7
12.3~18.1
≥21.1
≥480
≥21.1
≥480||tt ||Test method
GB/T 8656
GB/T 8656
GB/T 8656
Note: The stress and strain properties of vulcanized rubber listed in Table 1 are This index is based on ASTMIRBNo6 carbon black. During arbitration inspection, IRBNo6 carbon black must be used. During factory inspection, domestic standard reference carbon black SRB: No. can also be used. Appendix A provides reference values ??for the difference between ASTMIRBNo6 and SRB3.
4 Inspection Rules
4.1 The manufacturer inspects the SBR1500 shipped from the factory according to this standard to ensure that all shipped products meet the requirements of this standard. Each batch of products should be accompanied by a quality certificate in a certain format. 4.2 The user has the right to inspect and accept the SBR1500 received in accordance with this standard. If the requirements of this standard are not met, objections must be raised within two months after arrival. The user shall not raise any objection if the product quality deteriorates due to improper storage or use. If a dispute arises between the supply and demand parties, the quality arbitration unit will conduct arbitration inspection in accordance with this standard. 4.3 Sampling rules shall be carried out in accordance with GB6734-86. 4.4 During factory inspection, take a sample from the sample, take an equal amount of gel sample from each sample, mix it, and prepare the sample according to GB6735-86.
4.5 Conduct full inspection on the prepared samples. If any of the inspection results does not meet the corresponding grade requirements, the batch of products should be downgraded or classified as unqualified products.
4.6 For volatile matter and Mooney viscosity during the arbitration inspection, each plastic package making up the sample shall be inspected separately. Other items shall be conducted according to the factory inspection methods 4.3~4.5. The volatile matter and Mooney viscosity are used to determine whether the batch is qualified or not according to Table 2. Table 2 Volatile content and Mooney viscosity batch qualification number Total number of plastic packages, N
less than 40
40~100
more than 100
number of samples, n|| tt||4
?
10
Qualification number, A.
0
1
2
When the number of unqualified products in sample n is greater than the batch qualification number A. , the batch of products is deemed unqualified, otherwise it is deemed qualified. 5 Packaging, marking, storage and transportation
5.1SBR1500 is packed in a composite bag or polypropylene woven bag lined with polyethylene film. The net weight of each pack of rubber is 25±0.25kg and 35±0.5kg.
5.2 The product name, brand number, net weight, manufacturer (company) name, registered trademark, etc. should be clearly marked on the front of each packaging bag. The manufacturing date or production batch number, etc. are printed on the label on the back or mouth of the bag. 5.3 When SBR1500 is stored, it should be stacked neatly in stacks and rows with a certain row spacing, and the stacking height should not exceed 10 pieces of glue. SBR1500 should be stored in a room temperature, ventilated, clean and dry warehouse. Open stacking and direct sunlight are strictly prohibited. 5.4 During the transportation of SBR1500, measures should be taken to prevent direct sunlight and rainwater immersion; transportation vehicles should be clean and tidy to avoid packaging damage and debris mixing.
The quality guarantee period of 5.5SBR1500 is two years from the production date. 103
Item
300% elongation stress
Tensile strength
Elongation at break
Mixed rubber Mooney viscosity||tt| |Item
GB 8655--88
Appendix A
(reference part)
ASTMIRBNO.6 carbon black and domestic synthetic rubber industry standard reference carbon black SRB3 The difference value of vulcanized rubber stress-strain performance results is
25min
35min
50min
35min
35min
MLIr| |tt||bits
MPa
MPa
%
difference
value
0.8
0.5||tt ||0.5Www.bzxZ.net
0
35
1
Note: ① This difference is in accordance with GB/T8656·-93 "Emulsion polymerized styrene-butadiene rubber (SBR) "Test formula and vulcanization characteristics evaluation" were obtained. ②IRBNO.The correction value of No. 6 is equal to the measured value of SRB No. 3 plus the difference. Additional notes:
This standard is under the jurisdiction of the Synthetic Rubber Sub-Technical Committee of the National Technical Committee for Standardization of Rubber and Rubber Products. This standard is drafted by Jihua Organic Synthesis Factory and Lanhua Synthetic Rubber Factory. GB 8655-1988 Styrene-butadiene Rubber (SBR) 1500" No. 1 modification sheet was approved by the State Bureau of Technical Supervision on August 7, 1997 in the form of Technical Supervision National Standard Letter (1997) No. 175. Since December 1997 It will be implemented from January 1st. | |tt | The difference term of the vulcanized rubber stress-strain performance results of carbon black SRB3 is compared
300% elongation stress
H
25min
35min||tt| |50 min
Tensile strength 35 min
35min
Elongation at break
Mixed rubber Mooney viscosity
Yang||tt| |MI.(1+4)100C
Single
bit
MPa
MPa
%
Difference
Value
0.8
-0.5
-0.5
0
35
1
This accurate value is based on GB /T8656-1993 "Emulsion polymerized styrene rubber (SBR) test formula and vulcanization characteristics evaluation" was obtained. The correction value of IRB No. 6 is equal to the measured value of SRB No. 3 plus the difference. 104
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