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CN-122011611-A - Composite rubber material for damping product and preparation method thereof

CN122011611ACN 122011611 ACN122011611 ACN 122011611ACN-122011611-A

Abstract

The application relates to the technical field of composite materials, in particular to a composite rubber material for shock-absorbing products and a preparation method thereof, wherein the composite rubber material comprises, by weight, 30-40 parts of chlorinated polyethylene rubber, 20-30 parts of fluororubber, 20-30 parts of chloroprene rubber, 10-15 parts of modified nano calcium carbonate, 3-5 parts of a filler, 5-8 parts of a compatibilizer, 2-4 parts of stearic acid, 3-4 parts of an anti-aging agent and 1-3 parts of a flame retardant, and the filler comprises calcium sulfate whiskers and fumed silica. The composite rubber material for the damping product has good flame retardance and wear resistance, improves the service efficiency of the composite rubber material and expands the application range through the matching and combination of the raw materials while improving the elasticity and ageing resistance of the composite rubber material.

Inventors

  • NIU GUIMING
  • LIU YANG
  • NIU YAN
  • LIU JIAN

Assignees

  • 广东明凯新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. The composite rubber material for the shock-absorbing product is characterized by comprising, by weight, 30-40 parts of chlorinated polyethylene rubber, 20-30 parts of fluororubber, 20-30 parts of chloroprene rubber, 10-15 parts of modified nano calcium carbonate, 3-5 parts of a filler, 5-8 parts of a compatibilizer, 2-4 parts of stearic acid, 3-4 parts of an anti-aging agent and 1-3 parts of a flame retardant; The filler includes calcium sulfate whiskers and fumed silica.
  2. 2. The composite rubber material for a vibration absorbing article according to claim 1, wherein the weight ratio of said calcium sulfate whiskers to said fumed silica is 2 (1-1.5).
  3. 3. The composite rubber material for a vibration damping article according to claim 1, wherein the anti-aging agent is obtained by mixing N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine and nickel N, N-di-N-butyldithiocarbamate in a weight ratio of (1-2): 1.
  4. 4. The composite rubber material for a vibration absorbing article according to claim 1, wherein the flame retardant is at least one of triethylphosphate, ammonium polyphosphate, and zinc borate.
  5. 5. The composite rubber material for shock absorbing products according to claim 1, wherein the preparation of the modified nano calcium carbonate is characterized by comprising the following steps of continuously dripping condensed phosphoric acid to carry out surface treatment on nano calcium carbonate particles to reduce the pH value of the nano calcium carbonate to below 8.0, continuously dripping titanate coupling agent, carrying out high-speed mixing, shearing and grinding to carry out dry surface coating on the nano calcium carbonate particles, and screening out coarse particles to obtain the modified nano calcium carbonate treated by the titanate coupling agent.
  6. 6. The composite rubber material for a shock absorbing article according to claim 1, wherein the preparation of the filler comprises the steps of: S1, ultrasonically dispersing calcium sulfate whiskers in a mixed solution prepared by absolute ethyl alcohol and deionized water (8-9) in a mass ratio of 1, adding gamma-aminopropyl triethoxysilane under a stirring condition, and uniformly mixing; s2, raising the temperature to 70-80 ℃, adding fumed silica, magnetically stirring at constant temperature for 5-8 hours, and obtaining the organosilicon modified filler after centrifugation, washing and drying; S3, pretreating graphene, namely placing the graphene into a mixed solution of sulfuric acid and nitric acid for ultrasonic dispersion, then refluxing for 4 hours at 80 ℃, and drying and grinding after the reaction is finished; S4, adding the graphene pretreated in the step S3 into ethanol for ultrasonic dispersion, adding the organosilicon modified filler prepared in the step S2, rapidly stirring at 25-35 ℃ to enable the organosilicon modified filler to fully react, centrifuging, washing with absolute ethanol for a plurality of times, vacuum drying, and grinding to obtain the filler.
  7. 7. The composite rubber material for a vibration absorbing article according to claim 6, wherein the fumed silica has an average particle diameter of 25 to 35nm.
  8. 8. The composite rubber material for shock absorbing products according to claim 6, wherein the weight ratio of the calcium sulfate whisker, the anhydrous ethanol and the gamma-aminopropyl triethoxysilane in the step S1 is 2 (8-12): 0.5-1.
  9. 9. A method for producing the composite rubber material for a shock absorbing article as claimed in any one of claims 1 to 8, comprising the steps of: (1) Adding chlorinated polyethylene rubber, fluororubber, chloroprene rubber, modified nano calcium carbonate, a filler, a compatibilizer, stearic acid, an anti-aging agent and a flame retardant into a strong dispersion mixer according to parts by weight, and stirring for 30-60min at the temperature of 120-140 ℃ and the vacuum degree of 0.08-0.10Mpa at the rotating speed of 100-300rpm to obtain a mixed raw material; (2) Hot-press molding, namely adding the mixed raw materials obtained in the step (1) into a mold cavity, and hot-press molding for 3-5min at the temperature of 145-165 ℃ and the pressure of 15-20MPa to obtain a crude product; (3) And (3) microwave heat treatment, namely placing the crude product obtained in the step (2) into a microwave heating device for solidification heat treatment at the temperature of 140-180 ℃, and cooling to room temperature to obtain the composite rubber material for the shock absorption product.
  10. 10. The method for producing a composite rubber material for a vibration absorbing article according to claim 9, wherein the curing heat treatment in step (3) is heat-insulating at 140 ℃, 160 ℃ and 180 ℃ for 1h, 1.5h and 2h, respectively, in this order.

Description

Composite rubber material for damping product and preparation method thereof Technical Field The application relates to the technical field of composite materials, in particular to a composite rubber material for a damping product and a preparation method thereof. Background The rubber is an ideal material for shock absorption, buffering and sound insulation due to the characteristics of good viscoelasticity, strong deformation adaptability, easy compounding and the like, is widely applied to the fields of automobiles, buildings, living goods and the like, and is a common rubber type of natural rubber, butyl rubber, chloroprene rubber, nitrile rubber, ethylene propylene rubber and silicone rubber. However, single rubber often has obvious short plates in performance, such as poor oil resistance of natural rubber, poor cold resistance of nitrile rubber, and cannot meet the higher requirements of rubber materials in reality. The composite rubber material obtains better performance by blending different rubbers or compounding with other materials, can overcome the performance limitation of single rubber, and is suitable for higher performance requirements and more application scenes. However, the preparation of the composite rubber material faces the problems of material selection limitation, complex component collocation, control of a preparation process and the like, and the general composite rubber material still has difficulty in considering the comprehensive properties of elasticity, flame retardance, weather resistance and the like. Disclosure of Invention The application aims at overcoming at least one of the defects in the prior art, provides a composite rubber material for shock-absorbing products and a preparation method thereof, the composite rubber material for shock-absorbing products is prepared by matching and combining raw materials, the composite rubber material has good flame retardance and wear resistance, improves the use efficiency of the composite rubber material and expands the application range while improving the elasticity and ageing resistance of the composite rubber material. In a first aspect, an embodiment of the present application provides a composite rubber material for a shock absorbing product, which is implemented by the following technical scheme: The composite rubber material for the shock-absorbing product comprises, by weight, 30-40 parts of chlorinated polyethylene rubber, 20-30 parts of fluororubber, 20-30 parts of chloroprene rubber, 10-15 parts of modified nano calcium carbonate, 3-5 parts of a filler, 5-8 parts of a compatibilizer, 2-4 parts of stearic acid, 3-4 parts of an anti-aging agent and 1-3 parts of a flame retardant; The filler includes calcium sulfate whiskers and fumed silica. The composite rubber material for the shock-absorbing product has at least the following beneficial effects: According to the composite rubber material, the chlorinated polyethylene rubber, the fluororubber and the chloroprene rubber are compounded, the fluororubber has good high-temperature resistance and corrosion resistance, the chlorinated polyethylene rubber has excellent flame resistance, ozone resistance and weather resistance, the chloroprene rubber has excellent weather resistance, flame resistance, oil resistance and acid and alkali resistance, and the mechanical strength is good, so that the comprehensive performance of the composite rubber material can be improved by matching the chlorinated polyethylene rubber, the fluororubber and the chloroprene rubber. The fumed silica can form a silica cover when the material burns, the cover has the functions of heat insulation and shielding, heat transfer and combustible material escape can be prevented, the addition of the fumed silica can also increase the carbon residue of the material, and the carbon residue of the composite material is gradually increased along with the increase of the consumption of the fumed silica, so that the carbon layer is gradually compact and complete, and the flame retardant property is improved. The calcium sulfate whisker is taken as microfiber, a stable framework is formed in rubber, the strength, the hardness and the modulus are obviously improved, the fiber structure can prevent crack propagation, absorb impact energy and improve the wear resistance of the rubber, and meanwhile, the calcium sulfate whisker is high-temperature resistant and nonflammable, so that the overall flame retardant effect of the rubber is enhanced; The compatibilizer can be enriched at the interface, so that the repulsive force of two phases is reduced, the aggregation of dispersed phase particles is prevented in the blending process, and the compatibility of each component is improved. The composite rubber material for the damping product has good flame retardance and wear resistance, improves the service efficiency of the composite rubber material and expands the application range through the matching and combination of