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CN-117754947-B - Ultra-high weather-resistant layer, TPO waterproof coiled material and preparation method

CN117754947BCN 117754947 BCN117754947 BCN 117754947BCN-117754947-B

Abstract

The invention belongs to the field of waterproof materials, and discloses an ultra-high weather-resistant layer, a TPO waterproof coiled material and a preparation method thereof. The material of the ultra-high weather-resistant layer comprises polyester resin, an auxiliary agent, titanium pigment and a filler, wherein the acid value of the polyester resin is 30-40mg KOH/g, the softening point is 100-115 ℃, the resin viscosity is 3200-4000 mPa.s, and the glass transition temperature is 50-65 ℃. The ultra-high weather-resistant layer with excellent weather resistance can provide stronger weather resistance for the waterproof coiled material and improve the service life of the waterproof coiled material.

Inventors

  • SU QINGWEI
  • LIU ZHIWEI
  • LIU ZHENHUA
  • LI JIANJUN
  • XU DAZHOU
  • WANG CONG
  • Cai Yuangui

Assignees

  • 北京东方雨虹防水技术股份有限公司

Dates

Publication Date
20260512
Application Date
20231206

Claims (10)

  1. TPO waterproof coiled material, characterized by that, the said waterproof coiled material includes decorative layer, ultra-high weather-proof layer, low-temperature-resistant top layer, first main body material layer and low-temperature-resistant bottom layer that set up sequentially from top to bottom; Based on the total weight of the ultra-high weather-resistant layer, the content of polyester resin is 50-60%, the content of auxiliary agent is 0.5-12%, the content of titanium pigment is 15-20%, and the content of filler is 20-25%; the acid value of the polyester resin is 30-40 mg KOH/g, the softening point is 100-115 ℃, the viscosity of the resin is 3200-4000 mPa.s, the glass transition temperature is 50-65 ℃, and the low-temperature curing temperature is 140-160 ℃; the polyester resin is prepared by a double bond copolymerization method; the thickness of the ultra-high weather-resistant layer is 0.15-0.25mm; Based on the total weight of the ultra-high weather-resistant layer, the auxiliary agent comprises 4-8% of a curing agent, 0.5-1% of a first photostabilizer, 0.5-1% of a first antioxidant, 0.5-0.8% of a coupling agent and 0.5-1% of a leveling agent; the filler is heavy calcium carbonate with the granularity of 2000-2500 meshes; Based on the total weight of the low temperature resistant top layer or the low temperature resistant bottom layer, the materials of the low temperature resistant top layer and the low temperature resistant bottom layer respectively and independently comprise 50-60% of a first TPO resin, 10-25% of POE resin, 5-15% of an impact polypropylene resin, 10-18% of a first inorganic filler, 0.3-0.6% of a second antioxidant and 0.4-0.6% of a second light stabilizer; the thickness of the low temperature resistant top layer and the low temperature resistant bottom layer is respectively and independently 0.14-0.16mm.
  2. 2. The TPO waterproof coiled material according to claim 1, wherein the decorative layer is made of photochromic pigment powder particles, and the thickness of the decorative layer is 0.08-0.12mm.
  3. 3. The TPO waterproof roll material according to claim 1, wherein a glass fiber layer and a second main body material layer are further sequentially disposed between the first main body material layer and the low temperature resistant bottom layer.
  4. 4. The TPO waterproof roll according to claim 3, wherein the materials of the first main body material layer and the second main body material layer each independently comprise 70-80% of a second TPO resin, 15-20% of a second inorganic filler, 0.3-0.6% of a third antioxidant and 0.4-0.6% of a third light stabilizer, based on the total weight of the first main body material layer or the second main body material layer.
  5. 5. The TPO waterproofing membrane according to claim 3, wherein the thickness of the first and second body material layers is each independently 0.55-0.65mm.
  6. 6. The TPO waterproof roll material according to claim 3, wherein the glass fiber layer has a glass fiber gram weight of 70-80g/m 2 and a thickness of 0.1-0.3mm.
  7. 7. The TPO waterproof roll material of claim 1, wherein a non-woven layer is disposed under the low temperature resistant bottom layer.
  8. 8. The TPO waterproof roll as claimed in claim 7, wherein the non-woven fabric layer has a gram weight of 100-120g/m 2 and a thickness of 0.35-0.45mm.
  9. 9. The method for preparing the TPO waterproof coiled material according to any one of claims 1 to 8, which is characterized by comprising the following steps: s1, extruding the material of the low-temperature resistant bottom layer, then feeding the extruded material into a first calender for calendering, and then cooling and shaping the extruded material by a cooling roller set to obtain the low-temperature resistant bottom layer and feeding the low-temperature resistant bottom layer into a second calender; S2, respectively extruding the material of the low-temperature-resistant top layer and the material of the first main material layer, and then feeding the materials into a second calender; S3, sequentially extruding, cooling and shaping by a tablet press, crushing and screening the material of the ultra-high weather-resistant layer to obtain ultra-high weather-resistant particles, spraying the ultra-high weather-resistant particles on the upper surface of a low-temperature-resistant top layer to be rolled in a second calender, and carrying out composite rolling on each layer in the second calender to obtain the ultra-high weather-resistant layer; And S4, spraying the material of the decorative layer on the upper surface of the ultra-high weather-resistant layer, carrying out composite rolling again, and then cooling and shaping, correcting and metering and rolling through a cooling roller set to obtain the TPO waterproof coiled material.
  10. 10. The process for producing a TPO waterproof roll as claimed in claim 9, wherein, In step S3: The extrusion equipment comprises a double screw extruder with the length-diameter ratio of (14-18): 1; The extrusion temperature is 100-120 ℃; The tablet press is a stainless steel cooling tablet press; The equipment used for crushing is a crusher, and the rotating speed of the crusher is 2000-3000rpm; the particle size of the ultra-high weather-resistant particles is 35-45 mu m; The pressing force of the composite calendaring is 9-13KN; in step S4, the pressing force of the composite rolling is 3-7KN.

Description

Ultra-high weather-resistant layer, TPO waterproof coiled material and preparation method Technical Field The invention belongs to the field of waterproof materials, and in particular relates to an ultra-high weather-resistant layer, a TPO waterproof coiled material and a preparation method thereof. Background The waterproof material of the field has higher requirements for waterproof materials, and in recent years, the Thermoplastic Polyolefin (TPO) waterproof coiled material has good low-temperature performance, weldability, high joint peeling strength, corrosion resistance and root penetration resistance by virtue of the waterproof coiled material gradually enters the main stream of the waterproof field of the industrial building roof, and the high-end manufacturing process of the waterproof coiled material also leads the progress of the industry. Although the weather resistance is superior to that of the traditional material, the weather resistance is greatly reduced due to the increase of the age and the change of the environment. In addition, the decorativeness of the current roofing TPO is mainly reflected in that the difference of upper surface layer colors is used for decorating, the variability is less, more materials are needed to be used for color switching in the production process, and waste of raw materials and energy sources is caused. Disclosure of Invention The invention aims at overcoming the defects of the prior art and provides an ultrahigh weather-resistant layer, a TPO waterproof coiled material and a preparation method thereof. The ultra-high weather-resistant layer with excellent weather resistance can provide stronger weather resistance for the waterproof coiled material and improve the service life of the waterproof coiled material. In order to achieve the aim, the first aspect of the invention provides an ultra-high weather-resistant layer, which comprises the following components of polyester resin, auxiliary agent, titanium pigment and filler; The acid value of the polyester resin is 30-40mg KOH/g, the softening point is 100-115 ℃, the viscosity of the resin is 3200-4000 mPa.s, and the glass transition temperature is 50-65 ℃. In the invention, the polyester resin is a main base material of the ultra-high weather-resistant layer, the polyester resin with the indexes (acid value, softening point, resin viscosity and glass transition temperature) can be cured at a low temperature of 140-160 ℃, and the temperature can be overlapped with the extrusion temperature range of the waterproof coiled material production, so that the ultra-high weather-resistant layer can form compact combination with the waterproof coiled material. According to the present invention, preferably, the polyester resin is 50 to 60%, the auxiliary agent is 0.5 to 12%, the titanium pigment is 15 to 20%, and the filler is 20 to 25% based on the total weight of the ultra-high weather-resistant layer. According to the present invention, preferably, the thickness of the ultra-high weather resistant layer is 0.15 to 0.25mm. According to the present invention, preferably, the polyester resin is prepared by a double bond copolymerization method; According to the invention, preferably, the auxiliary agent comprises 4-8% of curing agent, 0.5-1% of first light stabilizer, 0.5-1% of first antioxidant, 0.5-0.8% of coupling agent and 0.5-1% of leveling agent based on the total weight of the ultra-high weather-resistant layer. In the present invention, the coupling agent functions as a dispersant. In the invention, the leveling agent can enable the surface of the ultra-high weather-resistant layer to be full and free of orange lines. According to the invention, the filler is preferably ground calcium carbonate of particle size 2000-2500 mesh. The second aspect of the invention provides a TPO waterproof coiled material, which comprises a decorative layer, an ultra-high weather-resistant layer, a low-temperature-resistant top layer, a first main body material layer and a low-temperature-resistant bottom layer which are sequentially arranged from top to bottom; the ultra-high weather-resistant layer is the ultra-high weather-resistant layer. According to the present invention, preferably, the materials of the low temperature resistant top layer and the low temperature resistant bottom layer each independently include 50 to 60% of a first TPO resin, 10 to 25% of a POE resin, 5 to 15% of an impact polypropylene resin, 10 to 18% of a first inorganic filler, 0.3 to 0.6% of a second antioxidant and 0.4 to 0.6% of a second light stabilizer, based on the total weight of the low temperature resistant top layer or the low temperature resistant bottom layer. According to the present invention, preferably, the thickness of the low temperature resistant top layer and the low temperature resistant bottom layer is each independently 0.14 to 0.16mm. According to the invention, the material of the decorative layer is preferably photochromic pig