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CN-122011578-A - Fluorine-free halogen-free flame retardant polypropylene composition and preparation method and application thereof

CN122011578ACN 122011578 ACN122011578 ACN 122011578ACN-122011578-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 polypropylene composition comprises, by weight, 55-70 parts of polypropylene resin, 24-30 parts of a compound flame retardant, 9-15 parts of SBS resin and 0.2-2 parts of an active auxiliary agent, wherein the melt flow rate of the SBS resin is more than or equal to 4g/10min under the load of 5kg at the temperature of 190 ℃, and the compound flame retardant comprises piperazine flame retardant, melamine salt flame retardant and phosphines/phosphates flame retardant. According to the invention, the SBS resin with specific melt flow rate and the active auxiliary agent are added into the polypropylene resin system, and the polypropylene composition prepared by combining the compound flame retardant has good flame retardant property and better mechanical property.

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: 55-70 parts of polypropylene resin; 24-30 parts of compound flame retardant; 9-15 parts of SBS resin; 0.2-2 parts of active auxiliary agent; The melt flow rate of the SBS resin is more than or equal to 4g/10min at 190 ℃ under a 5kg load, preferably, the melt flow rate of the SBS resin is 5-15 g/10min at 190 ℃ under the 5kg load, 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 acrylate polymer and/or an epoxy resin, preferably wherein the co-agent comprises an acrylate polymer and an epoxy resin.
  3. 3. The fluorine-free halogen-free flame retardant polypropylene composition according to claim 2, wherein at least one of the following four is satisfied: (a) The mass ratio of the acrylic polymer to the epoxy resin in the active auxiliary agent is 1 (0.3-3); (b) The acrylic polymer comprises pentaerythritol triacrylate, trimethylolpropane triacrylate one or more of trimethylolpropane trimethacrylate or glycerol trimethylolpropane ether triacrylate; (c) The epoxy resin comprises one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, polyphenol type glycidyl ether epoxy resin, aliphatic glycidyl ether epoxy resin or aliphatic glycidyl ester epoxy resin; (d) The number average molecular weight of the epoxy resin is 800-2000.
  4. 4. 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).
  5. 5. The fluorine-free halogen-free flame retardant polypropylene composition according to claim 1 or 4, 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/phosphate flame retardant comprises one or more of aluminum hypophosphite, calcium hypophosphite or aluminum diethylphosphinate.
  6. 6. The fluorine-free halogen-free flame retardant polypropylene composition according to claim 1, wherein the polypropylene resin has a melt flow rate of not less than 28g/10min at 230 ℃ under a load of 2.16 kg.
  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 prepared from the 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 (PP) is one of five general plastics, has the advantages of easy processing, good electrical insulation, chemical solvent resistance and the like, and is widely applied to the fields of automobiles, household appliances, wires and cables, packaging materials and the like. However, polypropylene resins are very susceptible to oxidative degradation at high temperatures and to drips with fire during combustion, and fluorine-containing anti-drip agents are usually added to solve the problem of flame retardant drips, whereas REACH ban aims to prohibit the manufacture, marketing and use of all perfluoroalkyl compounds and polyfluoroalkyl compounds (PFAS) in the european union. Although the traditional halogen-free flame retardant such as nitrogen and phosphorus series flame retardants, inorganic oxides and the like has excellent flame retardant effect, the content of the flame retardant is generally required to be properly increased in order to realize V-0 flame retardance on the premise of not adding anti-dripping agents, but the mechanical property of the material is obviously reduced due to the compatibility difference between the flame retardant and matrix resin. 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 high melt strength content results in a system with lower melt index, which makes the processing of the material difficult. Disclosure of Invention The invention aims to overcome the defect that the fluorine-free 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. The invention also aims to provide application of the fluorine-free halogen-free flame retardant 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: 55-70 parts of polypropylene resin; 24-30 parts of compound flame retardant; 9-15 parts of SBS resin; 0.2-2 parts of active auxiliary agent; The melt flow rate of the SBS resin is more than or equal to 4g/10min at 190 ℃ under a 5kg load, preferably, the melt flow rate of the SBS resin is 5-15 g/10min at 190 ℃ under the 5kg load, and the compound flame retardant comprises piperazine flame retardant, melamine salt flame retardant and phosphines/phosphates flame retardant. The invention provides a fluorine-free halogen-free flame-retardant polypropylene composition, which adopts polypropylene resin as matrix resin, styrene-butadiene-styrene (SBS resin) with specific melt flow rate is added to uniformly disperse in a system, meanwhile, the SBS resin contains an active double bond structure, can co-act with a reactive auxiliary agent in the combustion process, is connected with free radicals generated by the breakage of the polypropylene resin, and combines with a compound flame retardant to ensure that the prepared polypropylene composition has better flame retardant property and good mechanical property. The fluorine-free halogen-free flame-retardant polypropylene composition provided by the invention has the advantages that the fluorine content of 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 polypropylene resin content is preferably not less than 50wt%. 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