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White carbon black modified polyamine dispersant-containing rubber composition and applications thereof
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A rubber composition and silica technology, applied in the rubber field, can solve the problems of weak rubber bonding force, limited improvement of silica dispersion, poor compatibility, etc. The effect of good silica dispersion
Active Publication Date: 2018-12-07
RACHEM CHINA CO LTD +1
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Abstract
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Problems solved by technology
However, amino compounds are polar substances, have poor compatibility with rubber, have extremely weak bonding with rubber, and have limited improvement on the dispersion of silica
Method used
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Embodiment 1
[0057] Add 30g of polyamine (BASFLupasol WF) to a 250ml flask equipped with a stirring device, a thermometer and a reflux condenser, start stirring, and after the temperature rises to 60°C, add 90g of oleic acid dropwise to the flask. After the dropwise addition is completed, heat up to 90°C Stir at ~100°C for 10 minutes, sample A, gradually raise the temperature to 160°C and distill at atmospheric pressure for 60 minutes, and distill under reduced pressure until no fraction comes out to obtain the white carbon black modified polyamine dispersant, the pH of which is measured to be 8.02.
[0058] pH test: Dissolve 1g of white carbon black modified polyamine dispersant in 20ml of ethanol, and use Mettler FE20pH meter to measure.
[0059] Characterized by Fourier transforminfrared FT-IR, the white carbon black modified polyamine dispersant prepared by the present invention has amide structure (1647cm -1 ) generation, see attached figure 1 (1561cm -1 It is the characteristic st...
Embodiment 2-3
[0061] Except for changing the amount of organic carboxylic acid and polyamine Lupasol WF, the preparation process of the silica-modified polyamine dispersant in Example 1 was repeated. The specific parameter conditions are shown in Table 1.
[0062]
Embodiment 4
[0064] White carbon black adsorption test:
[0065] 1) Take by weighing 1g of the silica-modified polyamine dispersant prepared in Example 1-3 in a long-necked beaker, add 100ml of ethanol to dissolve;
[0066] 2) After the silica-modified polyamine dispersant is completely dissolved, add 20g of powdered silica VN3;
[0067] 3) Using IKAT25 disperser, stirring and dispersing at 3000rpm;
[0068] 4) Take a sample from the dispersion system and filter it with a suction filter bottle;
[0069] 5) Wash the suction filter cake with ethanol, and then suction filter, repeating 3 times;
[0071] 7) Sample TGA test. The results are shown in Table 2.
[0072] TGA test: TGA / DSC1 thermogravimetric analyzer from Mettler Company, sample size is about 10mg, 70ul ceramiccrucible, N2 atmosphere, temperature rise 20°C / min.
[0073] A blank ...
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Abstract
The invention discloses a white carbon black modified polyamine dispersant for rubber shown in formula (I) and a preparation method thereof, wherein the white carbon black modified polyamine dispersant is prepared by mixing and reacting polyamine with organic carboxylic acid or organic carboxylic ester. The white carbon black modified polyamine dispersant has polar amino functional group and nonpolar side chainhydrocarbon structure, and is used for preparing a rubber composition, the polar functional group and white carbon black can be formed into a hydrogen bond or a chemical bond, so that intermolecular force of white carbon black can be weakened, the clustering tendency can be reduced, the nonpolar side chainhydrocarbon structure can improve the compatibility of rubber, the dispersionof white carbon black in rubber and the lagging performance of vulcanized rubber can be improved. The invention further discloses a white carbon black modified polyamine dispersant-containing rubbercomposition, which at least comprises (i) rubber component selected from natural rubber or synthesized rubber; (ii) white carbon black component; and (iii) white carbon black modified polyamine dispersant for rubber and with a structure shown in the formula (I).
Description
technical field [0001] The invention belongs to the field of rubber and relates to a rubber composition containing a white carbon black modified polyamine dispersant and an application thereof. Background technique [0002] At present, styrene-butadiene rubber and high specific surface area silica are important raw material factors for the preparation of high-performance "green" tires. However, the compatibility between silica and styrene-butadiene rubber is poor, and it is difficult to disperse silica. Therefore, during the use of silica, there is an urgent need for some processing aids to improve its dispersion in rubber and improve the properties of silica compounds. [0003] At present, the additives to improve the dispersion of silica in rubber mainly include: silanecoupling agents, zincsoap salts and surfactants. Silanecoupling agent, such as Si69, has a remarkable effect. On the one hand, it reacts chemically with silica to reduce the surface polarity of silica; ...
Claims
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Application Information
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