Search

CN-121975450-A - Weather-resistant polyethylene waterproof coiled material and preparation method thereof

CN121975450ACN 121975450 ACN121975450 ACN 121975450ACN-121975450-A

Abstract

The application belongs to the technical field of waterproof coiled material preparation, and particularly relates to a weather-resistant polyethylene waterproof coiled material and a preparation method thereof. According to the application, epoxy functionalized polytetrahydrofuran ether glycol is mixed into traditional bisphenol A-based epoxy resin, the adhesive prepared by adding poly epsilon-caprolactone particles and fumed silica is combined with a polyethylene base material to obtain the weather-resistant polyethylene waterproof coiled material, the anti-aging performance and the waterproof performance of the adhesive are synergistically improved by the polytetrahydrofuran ether glycol and the poly epsilon-caprolactone particles, the strength of the fumed silica is reduced in the modification process, the rheological property is improved, and the coiled material can meet the application requirements of severe working conditions such as outdoor and wet base layers.

Inventors

  • ZHANG LU
  • Dai Rongkai

Assignees

  • 杭州融融光电缆材料有限公司

Dates

Publication Date
20260505
Application Date
20260226

Claims (10)

  1. 1. A weather-resistant polyethylene waterproof coiled material is characterized by comprising an anti-sticking isolation layer (1), a self-sticking adhesive layer (2) and a polyethylene substrate layer (3), wherein the anti-sticking isolation layer (1) is PET release paper, the self-sticking adhesive layer (2) is a modified epoxy resin adhesive, the modified epoxy resin adhesive is prepared by doping epoxy functionalized polytetrahydrofuran ether glycol into traditional bisphenol A-based epoxy resin and adding poly epsilon-caprolactone particles and fumed silica.
  2. 2. The weather-resistant polyethylene waterproof roll as claimed in claim 1, wherein in the polyethylene base material layer (3), the polyethylene pellet preparation method comprises: a1, mixing maleic anhydride grafted linear low-density polyethylene, ultra-low-density polyethylene and metallocene linear low-density polyethylene, and stirring to obtain base resin; A2, adding an elastomer modifier into the base resin, premixing, adding a coupling agent, an antioxidant and a lubricant, stirring, extruding, granulating and drying to obtain polyethylene granules.
  3. 3. The preparation method of the weather-resistant polyethylene waterproof coiled material according to claim 2 is characterized in that in A1, the mass ratio of the maleic anhydride grafted linear low density polyethylene to the ultra-low density polyethylene to the metallocene linear low density polyethylene is 1 (0.5-0.6) (0.3-0.4), the stirring temperature is 180-190 ℃, in A2, the operation and parameters of extrusion granulation are that the temperature of a first area of a double-screw extruder is 140-150 ℃, the temperature of a second area of the double-screw extruder is 160-170 ℃, the temperature of a third area of the double-screw extruder is 170-180 ℃, the temperature of a machine head is 180-190 ℃, the rotating speed of a screw is 200-300 rpm, the feeding speed of the polyethylene base material is 50-80 kg/h, after the polyethylene base material is melted and plasticized by the double-screw extruder, continuous molten material strips are formed through a porous die head aperture of 2-3 mm, the material strips are directly fed into an underwater granulator, the granulating temperature of 20-30 ℃, the rotating speed of the granulator is 1000-1500 rpm, and the granulating length of the granulated material is 2-3 mm.
  4. 4. The method for preparing a weather-resistant polyethylene waterproof coiled material according to claim 2, wherein in the A2, the elastomer modifier is maleic anhydride grafted POE; the antioxidant is pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and dilauryl thiodipropionate, the mass ratio of the pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate to dilauryl thiodipropionate is 1 (0.6-1.6), the coupling agent is a silane coupling agent, the lubricant is any one or more of polyethylene wax, silicone master batch and vinyl bis-stearamide, the mass ratio of the base resin, the elastomer modifier, the antioxidant, the coupling agent and the lubricant is 1 (0.1-0.2) (0.01-0.015) (0.03-0.04) (0.026-0.038), the premixing temperature is 120-130 ℃, the speed is 80-100 rpm, the premixing time is 10-30 min, the stirring temperature is 135-145 ℃, the speed is 50-60 rpm, and the stirring time is 5-10 min.
  5. 5. The weather-resistant polyethylene waterproof roll as claimed in claim 1, wherein the preparation method of the modified epoxy resin adhesive in the self-adhesive layer (2) comprises the following steps: b1, mixing polytetrahydrofuran glycol and toluene, adding epichlorohydrin and a phase transfer catalyst, reacting, cooling to a preset temperature, adding a sodium hydroxide aqueous solution, and stirring at the preset temperature to obtain an epoxy functionalized polytetrahydrofuran ether glycol crude product; b2, filtering the crude product of the epoxy functionalized polytetrahydrofuran ether glycol, evaporating the filtrate, and drying to obtain the epoxy functionalized polytetrahydrofuran ether glycol; And B3, adding epoxy functionalized polytetrahydrofuran ether glycol and a catalyst into the preheated bisphenol A-based epoxy resin, reacting to obtain a modified epoxy resin matrix, cooling to a preset temperature, adding poly epsilon-caprolactone particles, fumed silica and a coupling agent, shearing, dispersing and defoaming to obtain the modified epoxy resin adhesive.
  6. 6. The weather-resistant polyethylene waterproof coiled material according to claim 5, wherein in the B1, the mass ratio of polytetrahydrofuran glycol, epichlorohydrin, toluene, a phase transfer catalyst and a sodium hydroxide aqueous solution is 100 (114-152): (80-150): (0.3-1): (4.8-6), the phase transfer catalyst is tetrabutylammonium bromide, the reaction temperature is 80-90 ℃, the reaction time is 1-3 hours, the preset temperature is 65-75 ℃, the concentration of the sodium hydroxide aqueous solution is 40-50 wt.%, the stirring time is 2-4 hours, the filtrate evaporation temperature in the B2 is 50-60 ℃, the drying temperature is 50-60 ℃ and the drying time is 3-5 hours.
  7. 7. The weather-resistant polyethylene waterproof coiled material according to claim 5, wherein in the step B3, the catalyst is tetrabutylammonium bromide, the coupling agent is silane coupling agent KH-560, the preheating temperature is 68-72 ℃, the preheating time is 5-10 min, and the mass ratio of bisphenol A-based epoxy resin, epoxy functionalized polytetrahydrofuran ether glycol, catalyst, poly epsilon-caprolactone particles, fumed silica and coupling agent is 100 (12-18): (0.01-0.05): (8-12): (0.8-1.2): (0.4-0.6).
  8. 8. The weather-resistant polyethylene waterproof coiled material according to claim 5, wherein in the step B3, the reaction temperature is 80-85 ℃, the reaction time is 2-4 hours, the preset temperature is 45-50 ℃, the shearing and dispersing rotating speed is 1200-1500 rpm, the shearing and dispersing time is 15-25 minutes, and the defoaming conditions are that the rotating speed is 1500-2000 rpm, the temperature is 45-50 ℃, the vacuum degree is-0.09 MPa and the time is 2-3 minutes.
  9. 9. The method for preparing the weather-resistant polyethylene waterproof coiled material according to claim 1, wherein the method for preparing the waterproof coiled material comprises the following steps: S1, extruding polyethylene granules into a cast sheet, stretching, heat setting, and corona to obtain a polyethylene film; s2, adding a curing agent into the modified epoxy resin adhesive, stirring, coating the mixture on a polyethylene film, curing, cooling, and covering PET release paper to obtain the polyethylene waterproof coiled material.
  10. 10. The method for preparing the weather-resistant polyethylene waterproof coiled material according to claim 9, wherein in the step S1, the operation and parameters of the extrusion casting sheet are that the extrusion temperature is 180-210 ℃, a melt is extruded through a T-shaped die, and is cast to the surface of a cooling roller, the temperature of the cooling roller is 20-30 ℃, and the casting sheet with the thickness of 1.0-2.0 mm is prepared; the operation and parameters of the stretching are that a cast sheet is heated to 100-120 ℃, is longitudinally stretched at a speed of 15-30 m/min, is heated to 110-125 ℃, is transversely stretched at a speed of 10-20 m/min, is pre-cooled to 30-20 kV, is subjected to heat setting at 120-125 ℃, is set for 10-30 seconds, is cooled to 5-10 ℃ per second, is obtained by introducing a film subjected to heat setting into a position between a discharge electrode and a grounding roller of a corona treatment machine, is adjusted to a tension of 20-50N/m, is preheated to a high-voltage generator for 5-10 min, is introduced into the film, is subjected to a distance of 2-5 mm between the discharge electrode and the film, is subjected to a discharge power of 200-350 W.min/m < 2 >, is subjected to a discharge voltage of 12-20 kV, is subjected to heat setting at a temperature of 30-80 m/min, is set for 10-30 seconds in an environment of 23-25 ℃ and is subjected to humidity% >, is subjected to cooling at 5-10 ℃ per second, is subjected to corona curing, is obtained by introducing a curing agent into the corona treatment at a temperature of diethylenetriamine, is subjected to heat setting at a temperature of 45 ℃ and is subjected to primary curing at a temperature of 200-80 ℃ for 10-30 rpm (the primary curing time of 1-30 ℃ per 2).

Description

Weather-resistant polyethylene waterproof coiled material and preparation method thereof Technical Field The invention relates to the technical field of waterproof coiled material preparation, in particular to a weather-proof polyethylene waterproof coiled material and a preparation method thereof. Background Along with the rising of domestic underground engineering construction hot tide, the technology of the waterproof coiled material is continuously adapted to multiple scenes, and the industry develops seven pre-paving anti-adhesion application systems such as subways, underground comprehensive pipe racks, nuclear power and mountain tunnels around mainstream products. In the early stage, the asphalt felt similar to the cardboard in the main stream in China is used as a waterproof material for main engineering construction, is prepared by simply dipping asphalt, is required to be decocted on site in construction, is not only strong in smoke and is easy to cause fire, but also is afraid of sun-drying and freezing, has the service life of only 5-10 years, is required to be integrally shoveled after leakage, has extremely low efficiency, and is mainly suitable for the waterproof requirement of low-standard buildings at the time. In order to break through the performance limitation of the traditional asphalt, the representative SBS modified asphalt waterproof coiled material is produced, the elasticity and low temperature resistance of the coiled material are greatly improved by adding SBS rubber into asphalt, the coiled material can not crack at-25 ℃, the service life is prolonged to 15-20 years, and the market is still dominant. Meanwhile, the first generation of synthetic polymer coiled materials such as PVC, CPE and the like appear to mark that the domestic waterproof materials jump out of the asphalt category and develop toward the direction of diversification. Nowadays, high-performance polymer coils such as TPO and HDPE are the mainstream. TPO coiled material has rubber elasticity and plastic weldability, and its service life is up to above 30 years, and HDPE self-adhesive film coiled material is made into the water-proofing core material for underground engineering by means of pre-paving anti-sticking technology. HDPE self-adhesive film coiled material uses high density polyethylene as substrate, matches self-adhesive layer, can firmly combine with post-cast concrete after pre-paving, solves traditional coiled material problem of water-filling, but its weather resistance adaptation of exposing the scene for a long time is not enough, and the self-adhesive sealing performance of partial product is not good enough, easily forms the air flue when basic unit is uneven. Disclosure of Invention The invention aims to provide a preparation method of a weather-proof polyethylene waterproof coiled material. The waterproof coiled material prepared by the invention is of a multi-layer structure, the substrate layer is made of polyethylene, the waterproof coiled material has excellent chemical corrosion resistance and ultraviolet aging resistance, the introduction of epoxy functionalized polytetrahydrofuran ether glycol in the matched modified epoxy resin adhesive improves the flexibility and weather resistance of epoxy resin, the defects of embrittlement and easy cracking of the traditional epoxy resin are overcome, the fumed silica is used as a filler, a compact network structure can be formed on a self-adhesive layer, the penetration of ultraviolet rays and water vapor is effectively blocked, the aging rate of a polyethylene substrate is reduced, and the ageing resistance and fatigue resistance of the adhesive layer are further improved by the polyepsilon-caprolactone particles, so that the pulverization and debonding problems of the coiled material in complex outdoor environments such as cold-hot circulation, rain-snow corrosion and the like are avoided, and the service life of the coiled material is greatly prolonged. Compared with the traditional asphalt-based self-adhesive, the self-adhesive layer has stronger adhesive strength and temperature resistance stability, does not flow in a high-temperature environment and is not brittle in a low-temperature environment, and stable adhesive force can be maintained in a wide temperature range of-0 ℃ to 80 ℃. In order to achieve the aim, in a first aspect, the application provides a weather-resistant polyethylene waterproof coiled material, which comprises an anti-sticking isolation layer, a self-sticking adhesive layer and a polyethylene substrate layer, wherein the anti-sticking isolation layer is PET release paper, the self-sticking adhesive layer is a modified epoxy resin adhesive, the modified epoxy resin adhesive is prepared by mixing epoxy functionalized polytetrahydrofuran ether glycol into traditional bisphenol A-based epoxy resin, and adding poly epsilon-caprolactone particles and fumed silica. In a second aspect, the present invention provides a process f