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    發布日期:2018-11-07 作者:摘引 點擊:

                                                                               RETARDER RSF

    DESCRIPTION:

    A non-staining and non-discoloring retarder for natural and synthetic rubber compounds. Use from 0.50 to 1.3

    parts per 100 phr, depending on polymer and accelerator system used. Very effective with sulfenamide

    systems. Effective in thiazole systems as well as low sulfur/thiuram cures. Also useful for replasticizing of slightly

    scorched stocks by cold mill mixing. Replaces Retarder SAFE in many applications at a lower cost. When

    Retarder RSF is used in natural rubber, reversion is minimized.

    Does not bloom at recommended amounts and no odor occurs from the use of Retarder RSF. Does not

    significantly change the fully cured characteristics of the compound. State-of-cure is effected less than with most

    other retarders.

    TYPICAL PROPERTIES:

     Composition..........................................................Proprietary Blend

     Appearance...........................................................Cream to Tan Powder

     Odor .....................................................................Slight, typical

     Specific Gravity......................................................1.31

     Moisture................................................................0.5% maximum

     Melting Range........................................................77o

    - 83o

    C*

     Storage Stability.....................................................Stable

    TOXICITY:

    Not considered hazardous for normal industrial use. However, as with most rubber chemicals, avoid ingestion

    and wash with soap and water after use.

    * tentative range

    t-retrsf

    sb030702 Included with its product literature and upon the request of its customers, Akrochem provides product specifications and

    evaluations, suggested formulations and recommendations and other technical assistance, both orally and in writing

    (collectively the "Technical Information"). Although Akrochem believes all Technical Information to be true and correct, it

    makes no warranty, either express or implied, as to the accuracy, completeness, or fitness of the Technical Information for

    any intended use, or the results which may be obtained by any person using the Technical Information. Akrochem will not

    be liable for any cost, loss or damage, in tort, contract or otherwise, arising from customer's use of Akrochem products or

    Technical Information. It is the customer's sole responsibility to test the products and any Technical Information provided to

    determine whether they are suitable for the customer's needs. Before working with any product, the customer must read

    and become familiar with available information concerning its hazards, proper use, storage and handling, including all

    health, safety, and hygiene precautions recommended by the manufacturer. Nothing in the Technical Information is

    intended to be a recommendation to use any product, method, or process in violation of any intellectual property rights

    governing such product, method, or process. No license is implied or granted by Akrochem as to any such product, method,

    or process. AKROCHEM CORPORATION DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS AND IMPLIED,

    INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR

    PURPOSE, RELATED TO ANY PRODUCTS OR TECHNICAL INFORMATION PROVIDED BY AKROCHEM.RUBBER CHEMICALS

    -RETARDERS-

     RETARDER RSF vs. RETARDER SAFE

    Due to the escalating price of Retarder SAFE, an effort was made to find a reasonable substitute at a lower

    cost. SAFE performs best in sulfenamide cures (CBTS, OBTS, BBTS). It is notable for the retention of the

    state-of-cure of the compound due to an activating effect. SAFE also reduces reversion in natural rubber.

    SAFE’s ability as a scorch retarder is moderate overall. We feel Retarder RSF is a good replacement for

    Retarder SAFE in most cure systems. Here are a few test formulas and the results comparing Retarder SAFE

    with Retarder RSF.

    Sulfenamide Cure in SBR

    SBR 1805 212.5 Rheometer @ 340°F RSF SAFE No Retarder

    ZnO 5.0 T2 2.48 2.50 2.23

    Stearic 1.0 T90 5.67 7.12 5.17

    Sulfur 1.8 Max Torque 48.30 47.10 46.10

    BBTS 1.5

    TMTD 0.3 Scorch @ 270°F 15.95 15.79 11.11

    Retarder 1.0

    223.1

     

    In SBR, SAFE tends to increase cure time (T90). This will also be seen again in a thiazole-cured SBR.

    Scorch time and state-of-cure are comparable.

    Included with its product literature and upon the request of its customers, Akrochem provides product specifications and

    evaluations, suggested formulations and recommendations and other technical assistance, both orally and in writing

    (collectively the "Technical Information"). Although Akrochem believes all Technical Information to be true and correct, it

    makes no warranty, either express or implied, as to the accuracy, completeness, or fitness of the Technical Information for

    any intended use, or the results which may be obtained by any person using the Technical Information. Akrochem will not

    be liable for any cost, loss or damage, in tort, contract or otherwise, arising from customer's use of Akrochem products or

    Technical Information. It is the customer's sole responsibility to test the products and any Technical Information provided to

    determine whether they are suitable for the customer's needs. Before working with any product, the customer must read

    and become familiar with available information concerning its hazards, proper use, storage and handling, including all

    health, safety, and hygiene precautions recommended by the manufacturer. Nothing in the Technical Information is

    intended to be a recommendation to use any product, method, or process in violation of any intellectual property rights

    governing such product, method, or process. No license is implied or granted by Akrochem as to any such product, method,

    or process. AKROCHEM CORPORATION DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS AND IMPLIED,

    INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR

    PURPOSE, RELATED TO ANY PRODUCTS OR TECHNICAL INFORMATION PROVIDED BY AKROCHEM.Sulfenamide Cure in Natural Rubber

    Material PHR Rheometer @ 340°F RSF SAFE No Retarder

    SMR CV60 70.00 T2 2.07 2.10 1.88

    SBR 1500 30.00 T90 3.55 4.03 2.92

    N550 90.00 Max Torque 65.80 62.80 60.30

    Aromatic Oil 32.00

    ZnO 5.00 Scorch @ 270°F 13.52 13.43 9.62

    Stearic 1.50

    Sulfur 1.80

    CBTS 1.00

    TMTD 0.40

    Retarder 1.00

     231.70

    Again, scorch is equivalent to SAFE. Cure time is a little faster. Reversion is reduced by both retarders. Higher

    state-of-cure of the Retarder RSF resulted in a slight change in subsequent formulas to lower cured maximum

    torque.

    Included with its product literature and upon the request of its customers, Akrochem provides product specifications and

    evaluations, suggested formulations and recommendations and other technical assistance, both orally and in writing

    (collectively the "Technical Information"). Although Akrochem believes all Technical Information to be true and correct, it

    makes no warranty, either express or implied, as to the accuracy, completeness, or fitness of the Technical Information for

    any intended use, or the results which may be obtained by any person using the Technical Information. Akrochem will not

    be liable for any cost, loss or damage, in tort, contract or otherwise, arising from customer's use of Akrochem products or

    Technical Information. It is the customer's sole responsibility to test the products and any Technical Information provided to

    determine whether they are suitable for the customer's needs. Before working with any product, the customer must read

    and become familiar with available information concerning its hazards, proper use, storage and handling, including all

    health, safety, and hygiene precautions recommended by the manufacturer. Nothing in the Technical Information is

    intended to be a recommendation to use any product, method, or process in violation of any intellectual property rights

    governing such product, method, or process. No license is implied or granted by Akrochem as to any such product, method,

    or process. AKROCHEM CORPORATION DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS AND IMPLIED,

    INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR

    PURPOSE, RELATED TO ANY PRODUCTS OR TECHNICAL INFORMATION PROVIDED BY AKROCHEM.Thiazole Cure in SBR

    Material PHR Rheometer @ 340°F RSF SAFE No Retarder

    SBR 1805 212.50 T2 1.82 2.03 1.53

    ZnO 5.00 T90 5.22 9.47 5.77

    Stearic 0.90 Max. Torque 51.73 47.92 44.27

    Sulfur 1.50

    MBTS 1.50 Scorch @ 270°F 9.10 11.10 7.88

    DPG 0.60

    Retarder 1.00

    223.00

    Retarder RSF does not delay scorch as much as SAFE in this thiazole cure. However, most of the SAFE

    retarding is related to the slowing of the overall cure rate. T90 is slowed significantly. This seems to be a function

    of the SBR, since a thiazole-cured natural rubber showed minimal loss of T90. State-of-cure is raised slightly by

    the new retarder. Again, the formula has been adjusted to reduce these differences in torque.

    Included with its product literature and upon the request of its customers, Akrochem provides product specifications and

    evaluations, suggested formulations and recommendations and other technical assistance, both orally and in writing

    (collectively the "Technical Information"). Although Akrochem believes all Technical Information to be true and correct, it

    makes no warranty, either express or implied, as to the accuracy, completeness, or fitness of the Technical Information for

    any intended use, or the results which may be obtained by any person using the Technical Information. Akrochem will not

    be liable for any cost, loss or damage, in tort, contract or otherwise, arising from customer's use of Akrochem products or

    Technical Information. It is the customer's sole responsibility to test the products and any Technical Information provided to

    determine whether they are suitable for the customer's needs. Before working with any product, the customer must read

    and become familiar with available information concerning its hazards, proper use, storage and handling, including all

    health, safety, and hygiene precautions recommended by the manufacturer. Nothing in the Technical Information is

    intended to be a recommendation to use any product, method, or process in violation of any intellectual property rights

    governing such product, method, or process. No license is implied or granted by Akrochem as to any such product, method,

    or process. AKROCHEM CORPORATION DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS AND IMPLIED,

    INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR

    PURPOSE, RELATED TO ANY PRODUCTS OR TECHNICAL INFORMATION PROVIDED BY AKROCHEM.Low sulfur/high thiuram cure in NBR

    Material PHR Rheometer @ 340°F RSF SAFE No Retarder

    Krynac 34E35 100.00 T2 2.35 2.38 1.97

    Q325 Whiting 40.00 T90 8.27 6.62 7.10

    HC-75 Clay 20.00 Max Torque 60.14 73.40 62.62

    ZnO 5.00

    Stearic 0.50 Scorch @ 270°F 13.72 11.51 10.39

    MC-98 Sulfur 0.50

    TMTD 1.50

    TETD 1.50

    Retarder 1.00

    170.00

    SAFE has been known to have unusual effects in NBR. It does activate the cure and raises the state-of-cure

    significantly. Retarder RSF has about the same state-of-cure as the control and retards better than SAFE.

    Unfortunately the SAFE and RSF differ from one another in this type of cure system. They would each have

    certain advantages and disadvantages here.

    Retarder RSF may bloom if used in combination with Retarder CTP (PVI) due to similar (-imide) chemistry.

    No bloom should occur if RSF is used alone at less than 1.3 phr.


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