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CN-122011579-A - Fluorine-free halogen-free flame retardant polypropylene composition and preparation method and application thereof

CN122011579ACN 122011579 ACN122011579 ACN 122011579ACN-122011579-A

Abstract

The invention provides a fluorine-free halogen-free flame retardant polypropylene composition, and a preparation method and application thereof. The fluorine-free halogen-free flame-retardant polypropylene composition comprises, by weight, 56-70 parts of a first polypropylene resin, 6-12 parts of a second polypropylene resin, 24-28 parts of a compound flame retardant and 0.2-2 parts of a co-agent, wherein the tangent value tg delta of the second polypropylene resin is less than or equal to 2 when the frequency of the second polypropylene resin is 0.1Hz at 180 ℃, and the compound flame retardant comprises a piperazine flame retardant, a melamine salt flame retardant and a phosphines/phosphates flame retardant. According to the invention, a small amount of specific second polypropylene resin is added into the polypropylene resin, and the compound flame retardant and the active auxiliary agent are added, so that the prepared fluorine-free halogen-free flame retardant polypropylene composition has good flame retardant property and mechanical property, and good processability.

Inventors

  • SU JUANXIA
  • YE NANBIAO
  • YANG BO
  • ZHENG YIQUAN
  • JIANG XIANGXIN
  • ZHOU YUBIN

Assignees

  • 金发科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260227

Claims (10)

  1. 1. The fluorine-free halogen-free flame retardant polypropylene composition is characterized by comprising the following components in parts by weight: 56-70 parts of first polypropylene resin; 6-12 parts of a second polypropylene resin; 24-28 parts of compound flame retardant; 0.2-2 parts of active auxiliary agent; Wherein the tangent value tg delta of the loss angle delta of the second polypropylene resin at the frequency of 0.1Hz at 180 ℃ is less than or equal to 2, and the compound flame retardant comprises piperazine flame retardant, melamine salt flame retardant and phosphines/phosphates flame retardant.
  2. 2. The fluorine-free halogen-free flame retardant polypropylene composition according to claim 1, wherein the co-agent comprises an acrylic metal salt, preferably the co-agent comprises one or more of zinc acrylate, zinc methacrylate or aluminum acrylate.
  3. 3. The fluorine-free halogen-free flame retardant polypropylene composition according to claim 1, wherein the mass ratio of piperazine flame retardant, melamine salt flame retardant and phosphines/phosphates flame retardant in the compound flame retardant is (1.4-2.2): 1 (0.3-0.6).
  4. 4. A fluorine-free halogen-free flame retardant polypropylene composition according to claim 1 or 3, wherein the piperazine based flame retardant comprises one or more of piperazine phosphate, piperazine pyrophosphate or piperazine polyphosphate, the melamine salt flame retardant comprises melamine pyrophosphate flame retardant and/or melamine polyphosphate flame retardant, and the phosphines/phosphates flame retardant comprises one or more of aluminum hypophosphite, calcium hypophosphite or aluminum diethylphosphinate.
  5. 5. The fluorine-free halogen-free flame retardant polypropylene composition according to claim 1, wherein the second polypropylene resin has a tangent tg delta of 0.8 to 1.8 at a frequency of 0.1Hz at 180 ℃, preferably the second polypropylene resin has a tangent tg delta of 1.0 to 1.6 at a frequency of 0.1Hz at 180 ℃.
  6. 6. The fluorine-free halogen-free flame retardant polypropylene composition according to claim 1, wherein the melt flow rate of the polypropylene resin at 230 ℃ under a load of 2.16kg is not less than 28g/10min, preferably the melt flow rate of the polypropylene resin at 230 ℃ under a load of 2.16kg is 30-70 g/10min.
  7. 7. The fluorine-free halogen-free flame retardant polypropylene composition according to claim 1, further comprising 0.5-2 parts of a processing aid, wherein the processing aid comprises one or more of an antioxidant, a lubricant or a toner.
  8. 8. A method for preparing the fluorine-free halogen-free flame retardant polypropylene composition according to any one of claims 1 to 7, comprising the steps of: the components are uniformly mixed according to the proportion, and the fluorine-free halogen-free flame retardant polypropylene composition is obtained through melt extrusion and granulation.
  9. 9. Use of the fluorine-free halogen-free flame retardant polypropylene composition according to any one of claims 1 to 7 for preparing a household appliance housing material.
  10. 10. An article of manufacture characterized by being made from the fluorine-free halogen-free flame retardant polypropylene composition of any one of claims 1 to 7.

Description

Fluorine-free halogen-free flame retardant polypropylene composition and preparation method and application thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a fluorine-free halogen-free flame retardant polypropylene composition, a preparation method and application thereof. Background The polypropylene resin has better impact resistance and corrosion resistance, and is widely applied to materials such as electronic appliances, automobile materials, office supplies and the like. However, polypropylene resins have the disadvantage of being flammable, being very susceptible to degradation at high temperatures, being prone to dripping with fire during combustion, and generally require the addition of fluorine-containing anti-dripping agents to address the problem of flame retardant dripping, and REACH ban aims to prohibit the manufacture, marketing and use of all perfluoroalkyl and polyfluoroalkyl compounds (PFAS) in the european union. The nitrogen-phosphorus flame retardant has high flame retardant efficiency and is environment-friendly, and is an effective solution for halogen-free flame retardance. When no anti-dripping agent is added, it is generally necessary to appropriately increase the content of the flame retardant in order to achieve V-0 flame retardance. When more than 30% of the flame retardant is used in the polypropylene resin, the mechanical property and the processing property of the system are obviously deteriorated. Prior art CN117730121a discloses a fluorine-free halogen-free flame retardant polypropylene by adding a high melt strength polypropylene (HMS) having a melt strength of at least 20CNPP) as an anti-drip agent, wherein the high melt strength PP is added in an amount of above 10%, achieving a 1.6mm spline V-0 flame retardance, and similar mechanical properties to the sample to which the anti-drip agent was added. However, the melt index of the system is lower and the processability is poorer due to higher melt strength content. Disclosure of Invention The invention aims to overcome the defect that the fluorine-free halogen-free flame retardant polypropylene composition in the prior art cannot have better flame retardant property and mechanical property, and provides the fluorine-free halogen-free flame retardant polypropylene composition. The invention also aims to provide a preparation method of the fluorine-free halogen-free flame retardant polypropylene composition. It is a further object of the present invention to provide the use of the above polypropylene combination group. In order to achieve the above purpose, the invention adopts the following technical scheme: The fluorine-free halogen-free flame retardant polypropylene composition comprises the following components in parts by weight: 56-70 parts of first polypropylene resin; 6-12 parts of a second polypropylene resin; 24-28 parts of compound flame retardant; 0.2-2 parts of active auxiliary agent; Wherein the tangent value tg delta of the loss angle delta of the second polypropylene resin at the frequency of 0.1Hz at 180 ℃ is less than or equal to 2, and the compound flame retardant comprises piperazine flame retardant, melamine salt flame retardant and phosphines/phosphates flame retardant. The fluorine-free halogen-free flame-retardant polypropylene composition provided by the invention has the advantages that a small amount of second polypropylene resin and active auxiliary agent are added, and different types of flame retardants are compounded, so that the entanglement of molecular chains in the polypropylene composition can be effectively increased, the melt elasticity is improved, the sliding of the molecular chains at high temperature is delayed, and the prepared polypropylene composition has better flame retardance and mechanical property and good processability. The fluorine-free halogen-free flame-retardant polypropylene composition provided by the invention has the advantages that the fluorine content in the auxiliary agent with a flame-retardant function is not more than 10ppm, the total content of chlorine and bromine is not more than 1500ppm, and when the single content of chlorine and bromine is not more than 900ppm, the flame retardance of 1.5mmV-0 is achieved. In the fluorine-free halogen-free flame retardant polypropylene composition of the present invention, the first polypropylene resin content is preferably not less than 60wt%. It should be noted that, the co-agent is 0.2 to 2 parts, for example, but not limited to, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts, etc., and specific point values among the above point values are not exhaustive, and for brevity, the specific point values included in the range are not listed in the present invention. Preferably, the co-agent comprises a