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CN-121975206-A - Rubber composite material and preparation method and application thereof

CN121975206ACN 121975206 ACN121975206 ACN 121975206ACN-121975206-A

Abstract

The invention belongs to the technical field of compositions of high molecular compounds, and particularly relates to a rubber composite material and a preparation method and application thereof. The rubber composite material is prepared from 85-92 parts of rubber powder, 1-2 parts of ethylene-vinyl acetate copolymer, 1.2-1.8 parts of epoxidized natural rubber, 1-3.5 parts of activating agent, 3-6 parts of modifier, 1.5-3 parts of compatibilizer and 0.5-1 part of compatibility accelerator according to parts by weight, wherein the modifier is prepared by compounding disulfide-bismaleimide ethane, p-benzoquinone dioxime, hydrogenated castor oil and hyperbranched polyglycidyl ether. When the rubber modified asphalt is prepared by the invention, the compatibility of the asphalt and the rubber powder is effectively improved by adding the modifying component under the environment of high blending amount of the rubber powder.

Inventors

  • ZHANG GUANGKUN
  • ZHANG LEI
  • WANG JUNLEI
  • DU SUHONG
  • MENG NANA
  • REN XIAOHU

Assignees

  • 博信(山东)橡胶科技有限公司

Dates

Publication Date
20260505
Application Date
20260330

Claims (10)

  1. 1. The rubber composite material is characterized by comprising, by mass, 85-92 parts of rubber powder, 1-2 parts of ethylene-vinyl acetate copolymer, 1.2-1.8 parts of epoxidized natural rubber, 1-3.5 parts of an activator, 3-6 parts of a modifier, 1.5-3 parts of a compatibilizer and 0.5-1 part of a compatibility promoter, wherein the modifier is compounded by disulfide-bismaleimide ethane, p-benzoquinone dioxime, hydrogenated castor oil and hyperbranched polyglycidyl ether.
  2. 2. The rubber composite according to claim 1, wherein the activator is zinc oxide and stearic acid, and the mass ratio of stearic acid to zinc oxide is (3.5-5): 1.
  3. 3. The rubber composite according to claim 1, wherein the mass ratio of the disulfide-bismaleimide ethane, the p-benzoquinone dioxime, the hydrogenated castor oil and the hyperbranched polyglycidyl ether is (10-18): 5-6): 1-3): 1.
  4. 4. The rubber composite according to claim 1, wherein the compatibilizer is a naphthenic oil.
  5. 5. The rubber composite of claim 1, wherein the compatibilizing promoter is maleic anhydride grafted EVA.
  6. 6. The rubber composite according to claim 1, wherein the mesh number of the rubber powder is 40-80 mesh, the vinyl acetate content in the ethylene-vinyl acetate copolymer is 15-28 wt%, and the epoxidation ratio of the epoxidized natural rubber is 25-50%.
  7. 7. A method for preparing the rubber composite material according to any one of claims 1 to 6, which is characterized in that rubber powder, ethylene-vinyl acetate copolymer, epoxidized natural rubber, an activator, a modifier, a compatibilizer and a compatibility accelerator are mixed to prepare the rubber composite material, wherein the mixing temperature is 60-80 ℃ and the mixing time is 15-30 min.
  8. 8. The use of the rubber composite according to any one of claims 1 to 6 for the preparation of a rubber modified asphalt, comprising the steps of heating the asphalt, adding the rubber composite, mixing, and shearing to obtain the rubber modified asphalt.
  9. 9. The use of the rubber composite according to claim 8, wherein the mass ratio of asphalt to the rubber composite is 100 (30-35).
  10. 10. The use of the rubber compound according to claim 8, characterized in that the shearing temperature is 175-185 ℃, the shearing rate is 2500-2500 r/min, and the shearing time is 20-30 min.

Description

Rubber composite material and preparation method and application thereof Technical Field The invention belongs to the technical field of compositions of high molecular compounds, and particularly relates to a rubber composite material and a preparation method and application thereof. Background Rubber modified asphalt is widely applied to road engineering due to excellent performance, and is prepared by doping rubber powder treated by cracking, desulfurizing, surface modifying and the like and other high polymer materials on the basis of asphalt, and the effects of improving the low-temperature crack resistance, the high-temperature rutting resistance, the shock absorption, the noise reduction, the driving comfort and the like of the asphalt are achieved through doping. However, under the high-temperature processing and high-doping amount environment, the compatibility of the rubber powder and the asphalt is insufficient, and the problems that the rubber powder is easy to separate, has higher viscosity and is not easy to use during storage are presented, so that the development of the rubber composite material with better compatibility with the asphalt under the high-temperature processing and high-doping amount environment has important significance. Chinese patent CN120051536a discloses a composite comprising bitumen, ground tyre rubber and a compatibilizer, the composite comprising vulcanized rubber, in an amount of 5 to 20% by weight of the composite, pure bitumen, in an amount of 70 to 93% by weight of the composite, the compatibilizer comprising 2 to 10% by weight of the composite, and the compatibilizer comprising a. A hydroxy-functionalized propylene-based copolymer having a melting temperature of 60 to 100 ℃ and preferably having a degree of hydroxy functionalization of 0.1 to 0.6mol%, b. An aluminium-containing residue comprising elemental aluminium content of 0.1 to 1.5% by weight of the hydroxy-functionalized propylene-based copolymer. The hydroxy-functionalized propylene-based copolymer is selected from the group consisting of poly (propylene-co-5-hexen-1-ol), poly (propylene-co-10-undecen-1-ol), and the like. According to the patent, Δsp should satisfy +.5 ℃ when used for road asphalt, whereas Δsp=6 ℃ in example 1 and Δsp=10 ℃ in example 3 are clearly determined to be unsuitable for road applications, which means that the technical solution has limited product versatility at common proportions. In addition, the synthesis of hydroxy-functionalized propylene-based copolymers relies on hafnium, zirconium or titanium complex catalysts and solution polymerization processes, respectively, which are costly and sensitive to water and oxygen. Chinese patent CN103351630A discloses an epoxy resin modified rubber asphalt which is a mixture composed of A, B components, wherein the A component is prepared by adding rubber powder accounting for 18% of the weight of matrix asphalt into the matrix asphalt at 170-180 ℃, shearing and stirring, reducing the temperature to 130 ℃, adding a compound curing agent accounting for 40% of the weight of the matrix asphalt, 2,4, 6-tris (dimethylaminomethyl) phenol accounting for 5% of the weight of the matrix asphalt and a compatibilizer accounting for 5% of the weight of the matrix asphalt, wherein the B component is E-51 epoxy resin, the compound curing agent is methyl hexahydrophthalic anhydride and tung oil anhydride which react according to the weight ratio of 1:1, and the compatibilizer is epoxy resin E-51. The excessive use of the curing agent in the patent can cause the viscosity of the component A to be increased, affect the processing workability and be unfavorable for the compatibility of the two components in the subsequent A, B compounding process. Disclosure of Invention The invention aims to provide a rubber composite material, so that asphalt and rubber powder have excellent compatibility under the conditions of high mixing amount of rubber powder and high-temperature processing. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The rubber composite material is prepared from, by mass, 85-92 parts of rubber powder, 1-2 parts of an ethylene-vinyl acetate copolymer, 1.2-1.8 parts of an epoxidized natural rubber, 1-3.5 parts of an activator, 3-6 parts of a modifier, 1.5-3 parts of a compatibilizer and 0.5-1 part of a compatibility promoter, wherein the modifier is compounded from disulfide-bismaleimide ethane, p-benzoquinone dioxime, hydrogenated castor oil and hyperbranched polyglycidyl ether. The activating agent is zinc oxide and stearic acid, and the mass ratio of the stearic acid to the zinc oxide is (3.5-5): 1. The mass ratio of the disulfide-bismaleimide ethane, the p-benzoquinone dioxime, the hydrogenated castor oil and the hyperbranched polyglycidyl ether is (10-18): 5-6): 1-3): 1. The compatibilizer is naphthenic oil. The compatibility promoter is maleic anhydride grafted EVA. The mesh number of the ru