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CN-122011564-A - High-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for polyethylene film and preparation method thereof

CN122011564ACN 122011564 ACN122011564 ACN 122011564ACN-122011564-A

Abstract

The invention relates to a high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for a polyethylene film and a preparation method thereof. The flame retardant has high-temperature processing resistance, and meanwhile, the compounding auxiliary agent can play a role in high-dispersion flame retardance, and the high-efficiency coupling agent added into the formula is beneficial to improving the filling amount of flame retardant master batches and the dispersibility of the master batches, and meanwhile, plays a certain role in coating the flame retardant, improves the processability of low-melt-index resin, ensures that the filler is dispersed more uniformly, reduces extrusion pressure during plastic processing, reduces energy consumption and reduces mechanical abrasion.

Inventors

  • Hang Laibao
  • ZHANG DI
  • LIU QING
  • YAO CHENG

Assignees

  • 创合新材料科技江苏有限公司

Dates

Publication Date
20260512
Application Date
20260401
Priority Date
20251101

Claims (9)

  1. 1. The high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for the polyethylene film is characterized by comprising, by mass, 20-30 parts of linear low density polyethylene (LLDPE 8320), 60-70 parts of flame retardant, 10-20 parts of light stabilizer, 0.1-1 part of coupling agent, 0.1-1 part of nano zinc oxide, 0.1-1 part of lubricant and 0.2-1 part of antioxidant; The coupling agent is a plastic powder processing additive containing polyhydroxy structures, the melting temperature is 50-60 ℃, and the decomposition temperature is more than or equal to 330 ℃.
  2. 2. The high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for the polyethylene film according to claim 1, wherein the coupling agent is a plastic processing aid containing a polyhydroxy structure, and the plastic processing aid is commercially available from TMA-13 produced by new materials of Jiangsu Tianma Gaokui family, wherein the hydroxyl content is more than or equal to 9.5wt%, and the molecular weight is 800-1200g/mol.
  3. 3. The high temperature and high filling and high dispersion flame retardant weather resistant master batch for polyethylene film according to claim 1, wherein the linear low density polyethylene resin melt index is between 1 and 20g/10 min.
  4. 4. The high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for the polyethylene film according to claim 1, wherein the flame retardant is one or more of decabromodiphenyl ethane, ethylene bis-tetrabromophthalimide, decabromodiphenyl ether, piperazine pyrophosphate, antimony trioxide, ammonium polyphosphate and melamine cyanurate.
  5. 5. The high temperature resistant, high filled, high dispersion, flame retardant and weatherable master batch for polyethylene film according to claim 1, wherein the light stabilizer is one or more of light stabilizer 944, light stabilizer 770, light stabilizer 622, light stabilizer 2020 and light stabilizer 119.
  6. 6. The high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for the polyethylene film according to claim 1, wherein the nano zinc oxide is commercially available nano zinc oxide produced by Shandong Xingxingjimaterial, the specific surface area of the nano zinc oxide is more than 15m < 2 >/g, and the particle size of the nano zinc oxide is 30-50 nm.
  7. 7. The high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for the polyethylene film according to claim 1, wherein the lubricant is one or more of ethylene bis stearamide, silicone powder, zinc stearate, calcium stearate, stearic acid and polyethylene wax.
  8. 8. The high temperature resistant, high-filled, high dispersion, flame retardant and weather resistant masterbatch for polyethylene films of claim 1 wherein the antioxidant is a compound of hindered phenolic antioxidant 1010 and phosphite antioxidant 168 in a 1:1 ratio.
  9. 9. The preparation method of the high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for the polyethylene film is characterized by comprising the following steps of: 1) Adding the resin, the coupling agent and the flame retardant in the formula into a high-speed mixer, and stirring for 15-25min at normal temperature; 2) Adding the light stabilizer, the lubricant and the antioxidant into the step 1), and continuously stirring for 8-15min at high and low speed and normal temperature by a high-speed mixer; 3) And (3) adding the materials uniformly mixed in the step (2) through a main feed inlet of a double-screw extruder, extruding and granulating, and controlling the temperature of each region from a feeding section to a die surface to be 80-185 ℃.

Description

High-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for polyethylene film and preparation method thereof Technical Field The invention belongs to the field of polymer composite materials, and particularly relates to a high-temperature-resistant high-filling high-dispersion flame-retardant master batch for a polyethylene film and a preparation method thereof. Background Polyethylene has the advantages of excellent temperature resistance, good chemical stability, resistance to most of acid and alkali attack and good processing fluidity. The polyethylene is widely used in the plastic weaving field, municipal engineering pipe industry and the like at present, but the independent polyethylene has the problems of poor flame retardant property and insufficient mechanical property in the use process, so the polyethylene is usually modified in the aspect of necessary flame retardance and weather resistance before use, the polyethylene at present not only reaches the specified flame retardant level, but also meets the weather resistance stability requirement, and also has certain technical difficulties, mainly expressed as antagonism effect between the flame retardant and the light stabilizer, so the flame retardant and/or the light stabilizer are subjected to certain coating treatment, the antagonism effect is reduced, and the flame retardance and weather resistance requirement of the polyethylene is met. The common organic flame retardant in polyethylene is decabromodiphenyl ethane, decabromodiphenyl ether, ethylene bis tetrabromophthalimide, melamine polyphosphate, ammonium polyphosphate, piperazine pyrophosphate, etc., and the inorganic flame retardant is mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon flame retardant, etc. Light stabilizers commonly used in polyethylene include light stabilizer 770, light stabilizer 944, light stabilizer 119, light stabilizer 2020, light stabilizer 622, and the like. The flame retardant and the light stabilizer are used together to have antagonistic effect, so that the mechanical property is easy to be met, the flame retardant efficiency is low, the UL-94V-0 level cannot be achieved, meanwhile, the organic flame retardant and the inorganic flame retardant are reused, the problems of difficult dispersion, poor compatibility with resin and the like exist, the prepared flame retardant master batch has the problems of uneven dispersion of the resin auxiliary agent, defects on the surface of the master batch, increased extruder current, high head pressure and the like. For example, chinese patent CN201910512467.7 discloses a novel high-efficiency flame-retardant weather-proof master batch and a preparation method thereof, the master batch is mainly composed of polypropylene, ammonium polyphosphate, light stabilizer 944, ultraviolet absorber 531, antioxidant B215, processing aid and the like which are mixed and extruded according to a certain proportion, chinese patent CN103509263a discloses an environment-friendly additive type polyethylene flame-retardant master batch and a preparation method thereof, and the master batch is mainly composed of polyethylene, chlorinated polyethylene, decabromodiphenyl ethane, antimony trioxide, TBC flame retardant, MCA flame retardant, flame-retardant synergist, lubricant and antioxidant which are mixed and extruded according to a certain proportion. Chinese patent CN110643098 discloses a special flame-retardant synergistic functional master batch for modifying polyethylene and a preparation method thereof, wherein the master batch is prepared by mixing and extruding polyethylene, decabromodiphenyl ethane, antimony trioxide, ethylene-octene copolymer, styrene-acrylonitrile copolymer coated polytetrafluoroethylene, dispersing agent and lubricant according to a certain proportion. The problems that flame retardance and weather resistance cannot be achieved simultaneously, flame retardance efficiency is low, flame retardants are unevenly dispersed, powder is easy to fall off during high filling, processing is difficult and the like are solved. Disclosure of Invention The invention aims to provide a high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for a polyethylene film and a preparation method thereof. The invention adopts the technical scheme that the high-temperature-resistant high-filling high-dispersion flame-retardant weather-resistant master batch for the polyethylene film comprises, by mass, 20-30 parts of linear low density polyethylene (LLDPE 8320), 60-70 parts of flame retardant, 10-20 parts of light stabilizer, 0.1-1 part of coupling agent, 0.1-1 part of nano zinc oxide, 0.1-1 part of lubricant and 0.2-1 part of antioxidant; The coupling agent is a plastic powder processing additive containing polyhydroxy structures, the melting temperature is 50-60 ℃, and the decomposition temperature is more than or equal to 3