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CN-121975205-A - High-mechanical-property regenerated rubber composite material and preparation method thereof

CN121975205ACN 121975205 ACN121975205 ACN 121975205ACN-121975205-A

Abstract

The invention relates to the technical field of high polymer materials, and discloses a regenerated rubber composite material with high mechanical properties and a preparation method thereof. The regenerated rubber composite material is prepared by mixing 100 parts of regenerated rubber and 0.3-1.5 parts of titanate coupling agent, wherein the titanate coupling agent is a chelate type titanate coupling agent and/or a monoalkoxy type titanate coupling agent, and the titanate coupling agent contains pyrophosphoric acid acyloxy. The titanate coupling agent is added, so that the tensile strength and tear resistance of the regenerated rubber can be improved simultaneously. And the process is simple, no complex equipment is needed, and the tensile strength and tear resistance can be improved by the titanate coupling agent no matter in the preparation of reclaimed rubber or reclaimed rubber of finished products.

Inventors

  • REN HUIMING
  • HUANG DAYE
  • WANG DANLING
  • CHEN LI
  • LIU HUI

Assignees

  • 中策橡胶集团股份有限公司
  • 杭州海潮橡胶有限公司

Dates

Publication Date
20260505
Application Date
20260310

Claims (10)

  1. 1. The regenerated rubber composite material with high mechanical property is characterized in that the rubber composition is prepared by mixing 100 parts of regenerated rubber and 0.3-1.5 parts of titanate coupling agent according to 100 parts of raw rubber; the titanate coupling agent is a chelate type titanate coupling agent and/or a monoalkoxy type titanate coupling agent, and contains pyrophosphoric acid acyloxy.
  2. 2. The high mechanical strength reclaimed rubber composite of claim 1, wherein the titanate coupling agent is selected from one or more of isopropyl tri (dioctyl pyrophosphoryl oxy) titanate, isopropyl tri (diisooctyl pyrophosphoryl oxy) titanate, and bis (dioctyl pyrophosphoryl oxy) ethylene titanate.
  3. 3. The high mechanical strength reclaimed rubber composite of claim 1 wherein the titanate coupling agent is selected from bis (dioctyl pyrophosphoryloxy) ethylene titanate.
  4. 4. The regenerated rubber composite material with high mechanical property according to claim 1, wherein the adding amount of the titanate coupling agent is 0.5-1.2 parts.
  5. 5. The high mechanical property reclaimed rubber composite material of claim 1, wherein the isopropyl tri (dioctyl pyrophosphoyloxy) titanate is a yellow to amber translucent viscous liquid having a flash point of 105 ℃ and a density of 1.030 to 1.080 g/cm 3 at 20 ℃; And/or, the isopropyl tri (diisooctyl pyrophosphoryloxy) titanate is yellow to amber semitransparent viscous liquid, the flash point is 170 ℃, and the density is 1.030-1.080 g/cm 3 at 20 ℃; and/or the bis (dioctyl pyrophosphoryloxy) ethylene titanate is light yellow to brown transparent viscous liquid, has a flash point of 105 ℃ and a density of 1.090-1.110 g/cm 3 at 20 ℃.
  6. 6. The high mechanical property reclaimed rubber composite material of claim 1, wherein the reclaimed rubber is at least one of tire tread reclaimed rubber, butyl reclaimed rubber or ethylene propylene diene reclaimed rubber.
  7. 7. The high mechanical property reclaimed rubber composite as claimed in claim 1, wherein the method for preparing the reclaimed rubber composite comprises the following steps: s1, plasticating the reclaimed rubber on an open mill at a temperature of 40-60 ℃; s2, uniformly adding the titanate coupling agent, and alternately stirring by a left cutter and a right cutter to fully mix the titanate coupling agent with the reclaimed rubber; and S3, performing triangular packaging and rolling for several times until the titanate coupling agent is completely dispersed, and performing thin-pass sheet feeding to obtain the regenerated rubber composite material.
  8. 8. The regenerated rubber composite material with high mechanical properties according to claim 6, wherein in the step S2, the titanate coupling agent is added in a spraying or dripping mode after being diluted by white oil or solvent oil, and preferably, the mass ratio of the titanate coupling agent to the white oil or solvent oil is selected from 1:1-1:2.
  9. 9. The regenerated rubber composite material with high mechanical property according to claim 8, wherein the white oil is colorless transparent liquid, the kinematic viscosity at 40 ℃ is 5-12mm 2 /s, the flash point is more than or equal to 130 ℃, the aromatic hydrocarbon content is less than or equal to 0.01%, and 3# white oil, 5# white oil and 7# white oil are preferable; And/or the solvent oil is colorless transparent liquid, the kinematic viscosity at 20 ℃ is 1-3mm 2 /s, the flash point is more than or equal to 40 ℃, the aromatic hydrocarbon content is less than or equal to 0.3%, and the D40 and D60 solvent oil is preferable.
  10. 10. Use of a reclaimed rubber composite of high mechanical properties according to any of claims 1 to 9 for the preparation of rubber compositions.

Description

High-mechanical-property regenerated rubber composite material and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a regenerated rubber composite material with high mechanical properties and a preparation method thereof. Background The reclaimed rubber is a rubber material with plasticity obtained by crushing, desulfurizing and other processing treatments on waste rubber products. The wide application of the black pollution-free paint is helpful for solving the problems of black pollution and resource recycling. However, as the reclaimed rubber undergoes chain scission and degradation during production, its molecular network structure is destroyed, resulting in its mechanical properties, in particular the combined mechanical index-tensile product (product of tensile strength and elongation at break) and tear resistance, being far lower than virgin rubber, which severely limits its application in high value articles. Currently, methods for improving the performance of reclaimed rubber have focused on adding reinforcing agents (e.g., carbon black, white carbon black), plasticizers, or other rubbers and compensating for them. Although these methods have some effects, it is often difficult to synergistically increase tensile strength and elongation at break, and improvement of tear properties is limited, sometimes sacrificing processability or greatly increasing costs. Therefore, a new technology which can effectively and synergistically improve the tensile property and tear resistance of the reclaimed rubber, has simple process and controllable cost and has important industrial application value is developed. The Chinese patent CN201410073731.9 discloses a preparation process of high-strength reclaimed rubber, which comprises the steps of powder breaking, desulfurization and refining, wherein auxiliary materials added in the desulfurization step comprise 10 parts of rosin, 1 part of an activating agent, 5 parts of tall oil, 5 parts of a regenerating agent, 2 parts of ferric chloride, 5 parts of diethylene glycol diethyl ether, 5 parts of liquid phosphite ester, 3 parts of linoleic acid, 5 parts of 4-methoxyphenylethylamine and 2 parts of a titanate coupling agent. According to the invention, ferric chloride, diethylene glycol diethyl ether, liquid phosphite, linoleic acid, 4-methoxyphenethylamine and titanate coupling agent are added into the reclaimed rubber, so that the tensile strength and the stretch-break elongation of the reclaimed rubber are effectively improved. In the scheme, auxiliary materials are added in the process of preparing the reclaimed rubber to improve the mechanical properties of the reclaimed rubber, but the auxiliary material formula is quite complex, and the tear resistance of the reclaimed rubber is not considered. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the regenerated rubber composite material with high mechanical property and the preparation method thereof, and the tensile strength and tear resistance of the regenerated rubber can be effectively improved through a simple process and a titanate coupling agent. In order to achieve the above purpose, the present invention adopts the following technical scheme: the regenerated rubber composite material with high mechanical property is prepared by mixing 100 parts of regenerated rubber and 0.3-1.5 parts of titanate coupling agent according to 100 parts of raw rubber; the titanate coupling agent is a chelate type titanate coupling agent and/or a monoalkoxy type titanate coupling agent, and contains pyrophosphoric acid acyloxy. Preferably, the titanate coupling agent is selected from one or more of isopropyl tri (dioctyl pyrophosphoyloxy) titanate, isopropyl tri (diisooctyl pyrophosphoyloxy) titanate and bis (dioctyl pyrophosphoyloxy) ethylene titanate. Preferably, the titanate coupling agent is selected from bis (dioctyl pyrophosphoryloxy) ethylene titanate. Preferably, the addition amount of the titanate coupling agent is 0.5-1.2 parts. Preferably, the isopropyl tri (dioctyl pyrophosphoryloxy) titanate is yellow to amber semitransparent viscous liquid, has a flash point of 105 ℃ and a density of 1.030-1.080 g/cm 3 at 20 ℃; And/or, the isopropyl tri (diisooctyl pyrophosphoryloxy) titanate is yellow to amber semitransparent viscous liquid, the flash point is 170 ℃, and the density is 1.030-1.080 g/cm 3 at 20 ℃; and/or the bis (dioctyl pyrophosphoryloxy) ethylene titanate is light yellow to brown transparent viscous liquid, has a flash point of 105 ℃ and a density of 1.090-1.110 g/cm 3 at 20 ℃. Preferably, the reclaimed rubber is at least one of tire tread reclaimed rubber, butyl reclaimed rubber or ethylene propylene diene reclaimed rubber. Preferably, the preparation method of the reclaimed rubber composite material comprises the following steps: s1, plasticating the reclaimed rubber on an open mill at a temp