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CN-121975216-A - Ageing-resistant polyethylene pipe and preparation method thereof

CN121975216ACN 121975216 ACN121975216 ACN 121975216ACN-121975216-A

Abstract

The invention relates to the technical field of high polymer materials, and provides an anti-aging polyethylene pipe and a preparation method thereof, wherein the anti-aging polyethylene pipe comprises, by weight, 80-100 parts of high-density polyethylene, 20-30 parts of low-density polyethylene, 15-20 parts of polypropylene, 10-15 parts of an ethylene copolymer, 10-20 parts of a filler, 0.5-0.8 part of an antioxidant and 0.8-2 parts of a lubricant, and the raw materials of the filler comprise, by weight, 100 parts of talcum powder and 3-7 parts of 3-hydroxybenzoic acid ethyl ester. Through the technical scheme, the problem of insufficient ageing resistance of the polyethylene pipe in the related technology is solved.

Inventors

  • GU HONGQIANG
  • YANG SHILIANG
  • BAI BING

Assignees

  • 河北方盛塑业有限公司

Dates

Publication Date
20260505
Application Date
20260319

Claims (10)

  1. 1. The ageing-resistant polyethylene pipe is characterized by comprising the following raw materials, by weight, 80-100 parts of high-density polyethylene, 20-30 parts of low-density polyethylene, 15-20 parts of polypropylene, 10-15 parts of ethylene copolymer, 10-20 parts of filler, 0.5-0.8 part of antioxidant and 0.8-2 parts of lubricant; The raw materials of the filler comprise, by weight, 100 parts of talcum powder and 3-7 parts of ethyl 3-hydroxybenzoate.
  2. 2. The aging-resistant polyethylene pipe according to claim 1, wherein the mass ratio of the talcum powder to the ethyl 3-hydroxybenzoate is 100:4-5.
  3. 3. The ageing-resistant polyethylene pipe according to claim 1, wherein the preparation method of the filler comprises the steps of adding talcum powder into a solvent for uniform dispersion, adding ethyl 3-hydroxybenzoate for mixing, and drying to obtain the filler.
  4. 4. An ageing-resistant polyethylene pipe according to claim 3, wherein the temperature of the mixing is 50-60 ℃ and the time of the mixing is 1-2 hours.
  5. 5. An aging-resistant polyethylene pipe according to claim 3, wherein the solvent is absolute ethanol.
  6. 6. The aging-resistant polyethylene pipe according to claim 1, wherein the ethylene-based copolymer comprises an ethylene-vinyl acetate copolymer and an ethylene-1-octene copolymer.
  7. 7. The aging-resistant polyethylene pipe according to claim 6, wherein the mass ratio of the ethylene-vinyl acetate copolymer to the ethylene-1-octene copolymer is 5:6-7.
  8. 8. The aging-resistant polyethylene pipe according to claim 1, wherein said lubricant comprises one or more of zinc stearate, calcium stearate, polyethylene wax.
  9. 9. The aging-resistant polyethylene pipe according to claim 1, wherein the antioxidant comprises one or more of antioxidant 1010, antioxidant 1076, antioxidant 264.
  10. 10. A method for preparing an aging-resistant polyethylene pipe, which is used for preparing the aging-resistant polyethylene pipe according to any one of claims 1 to 9, and is characterized by comprising the following steps: and uniformly mixing the raw materials of the ageing-resistant polyethylene pipe, and extruding and forming to obtain the ageing-resistant polyethylene pipe.

Description

Ageing-resistant polyethylene pipe and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to an anti-aging polyethylene pipe and a preparation method thereof. Background Polyethylene pipe is widely used in the fields of urban water supply, gas transportation, agricultural irrigation, water and sewage discharge and the like due to the characteristics of excellent chemical corrosion resistance, good flexibility, light weight, convenient installation and the like. However, in the practical application process, the pipes are generally buried underground or exposed to the outdoor environment, and are subjected to the effects of heat, oxygen and other factors for a long time, and under the influence of heat and oxygen, the polyethylene base material can undergo free radical chain reaction, so that the mechanical properties of the polyethylene pipe are reduced, the surface is embrittled, the cracking and the joint sealing are invalid, and the preparation of the ageing-resistant polyethylene pipe has important significance. Disclosure of Invention The invention provides an aging-resistant polyethylene pipe and a preparation method thereof, which solve the problem of insufficient aging resistance of the polyethylene pipe in the related technology. The technical scheme of the invention is as follows: The invention provides an aging-resistant polyethylene pipe, which comprises the following raw materials, by weight, 80-100 parts of high-density polyethylene, 20-30 parts of low-density polyethylene, 15-20 parts of polypropylene, 10-15 parts of an ethylene copolymer, 10-20 parts of a filler, 0.5-0.8 part of an antioxidant and 0.8-2 parts of a lubricant; The raw materials of the filler comprise, by weight, 100 parts of talcum powder and 3-7 parts of ethyl 3-hydroxybenzoate. As a further technical scheme, the mass ratio of the talcum powder to the ethyl 3-hydroxybenzoate is 100:4-5, for example, 25:1, 100:4.5, 20:1, and preferably 100:4.5. The preparation method of the filler comprises the following steps of adding talcum powder into a solvent for uniform dispersion, adding ethyl 3-hydroxybenzoate for mixing, and drying to obtain the filler. As a further technical scheme, the mixing temperature is 50-60 ℃, and the mixing time is 1-2 h. As a further technical scheme, the solvent is absolute ethyl alcohol. As a further technical scheme, the ethylene-type copolymer comprises ethylene-vinyl acetate copolymer and ethylene-1-octene copolymer. The ethylene-vinyl acetate copolymer and the ethylene-1-octene copolymer are added as the ethylene copolymer, so that the impact strength of the polyethylene pipe is improved, and the ethylene-vinyl acetate copolymer has good compatibility with a polyethylene matrix due to the fact that the ethylene-vinyl acetate copolymer contains polar vinyl acetate groups in molecular chains, meanwhile, a flexible molecular chain segment can absorb impact energy, microcrack generation under the action of external force is reduced, the ethylene-1-octene copolymer is used as a polyolefin elastomer, the impact energy is dissipated through self elastic deformation when the external force is impacted, and the ethylene-vinyl acetate copolymer optimizes interface compatibility and matrix toughness under the synergistic effect of the ethylene-vinyl acetate copolymer and the ethylene-1-octene copolymer, so that the energy dissipation function is improved, the flexibility of the material is improved, the combination stability with the polyethylene matrix is ensured, and the impact strength of the polyethylene pipe is improved. As a further technical scheme, the mass ratio of the ethylene-vinyl acetate copolymer to the ethylene-1-octene copolymer is 5:6-7, for example, may be 5:6, 5:6.5, 5:7, and is preferably 5:6.5. As a further technical scheme, the lubricant comprises one or more of zinc stearate, calcium stearate and polyethylene wax. As a further technical scheme, the antioxidant comprises one or more of antioxidant 1010, antioxidant 1076 and antioxidant 264. The invention also provides a preparation method of the aging-resistant polyethylene pipe, which is used for preparing the aging-resistant polyethylene pipe and comprises the following steps: and uniformly mixing the raw materials of the ageing-resistant polyethylene pipe, and extruding and forming to obtain the ageing-resistant polyethylene pipe. The working principle and the beneficial effects of the invention are as follows: According to the invention, the ageing resistance of the polyethylene pipe is improved by adding the talcum powder modified by the 3-hydroxybenzoic acid ethyl ester, and the talcum powder has excellent heat ageing resistance, so that the ageing resistance of the polyethylene pipe can be improved, however, the talcum powder is easy to agglomerate and difficult to fully exert the heat ageing resistance, so that the ageing resistance of the polyethylene pip