A kind of rubber composition containing white carbon black modified polyamine dispersant and its application

A technology of silica and dispersant, applied in the field of rubber, can solve the problems of weak rubber binding force, limited improvement of silica dispersion, and poor compatibility, so as to improve tire grip and weaken the intermolecular interaction of silica force, improve the effect of dispersion

Active Publication Date: 2021-06-25
RACHEM CHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of rubber composition containing white carbon black modified polyamine dispersant and its application
  • A kind of rubber composition containing white carbon black modified polyamine dispersant and its application
  • A kind of rubber composition containing white carbon black modified polyamine dispersant and its application

Examples

Experimental program
Comparison scheme
Effect test

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 transform infrared 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;

[0070] 6) Dry the filter cake at 110°C to constant weight, and cool it to room temperature in a desiccator to obtain adsorbed white carbon black;

[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 ceramic crucible, N2 atmosphere, temperature rise 20°C / min.

[0073] A blank sa...

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PUM

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Abstract

The invention discloses a white carbon black modified polyamine dispersant for rubber represented by formula (I) and a preparation method thereof, which is prepared by mixing and reacting polyamine with organic carboxylic acid or organic carboxylic acid ester. The silica-modified polyamine dispersant of the present invention has a polar amino functional group and a non-polar side chain hydrocarbon group structure, which is used to prepare a rubber composition, and its polar functional group can form a hydrogen bond or a chemical bond with silica , weaken the intermolecular force of silica and reduce its tendency to agglomerate, and the non-polar side chain hydrocarbon group can improve the compatibility with rubber, improve the dispersion of silica in rubber, and the hysteresis of vulcanized rubber. The invention also discloses a rubber composition containing a white carbon black modified polyamine dispersant, at least comprising (i) a rubber component selected from natural rubber or synthetic rubber; (ii) a white carbon black component; (iii ) a silica-modified polyamine dispersant for rubber with a structure such as 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: silane coupling agents, zinc soap salts and surfactants. Silane coupling 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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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/06C08L7/00C08K13/06C08K9/04C08K3/36C08G73/02
CPCC08G73/02C08L9/06C08L7/00C08K13/06C08K9/08C08K3/36
Inventor 王万兴赵燕超侯远杨董栋
Owner RACHEM CHINA CO LTD
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