Flame-retardant polyolefin composition and preparation method thereof

A composition and polyolefin technology, applied in the field of olefin resins, can solve problems such as poor flame retardancy, toxic gas release, and poor low temperature resistance

Active Publication Date: 2022-01-21
湖南省新基源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the flame-retardant polypropylene technology is mainly based on the compound system of halogen and antimony trioxide. The disadvantage of toxic gas is easy to cause secondary damage
Halogen-free flame-retardant polypropylene, especially the halogen-free flame-retardant po...

Method used

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  • Flame-retardant polyolefin composition and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of flame retardant:

[0028] Step A11, mix pentaerythritol and dioxane, add phosphorus oxychloride at a temperature of 95°C, stir and react for 6 hours, filter after the reaction, and wash the filter cake with dioxane and n-hexane in sequence, and the washing is completed Finally, dry to constant weight at 70°C under vacuum conditions to obtain intermediate 1; wherein, the amount ratio of pentaerythritol, phosphorus oxychloride and dioxane is 3g: 1mL: 35mL; the mass fraction of phosphorus oxychloride is 50%;

[0029] Step A12. Mix intermediate 1, triethylamine and dichloromethane, then add acryloyl chloride, stir and react at 35°C for 16 hours, after the reaction is completed, cool to room temperature, filter, and concentrate the obtained filtrate under reduced pressure to remove Solvent to obtain intermediate 2; wherein, the ratio of intermediate 1, acryloyl chloride, triethylamine and dichloromethane is 2g: 1g: 1.1g: 20mL;

[0030] Step A13. Mix intermed...

Embodiment 2

[0032] Prepare the filler:

[0033] Step S11, mix talc powder and sodium hydroxide solution, stir at 90°C for 6h, then cool to room temperature, filter, wash with deionized water, after washing, dry at 80°C to constant weight to obtain hydroxyl To talcum powder, mix hydroxylated talc powder, ethanol and deionized water, adjust the pH value to 4 with acetic acid, disperse ultrasonically for 30 minutes, then add 3-aminopropyltrimethoxysilane, and react for 6 hours at 85°C. After the reaction, cooling, centrifugal washing, and drying were performed to obtain aminoated talcum powder; wherein, the mass fraction of sodium hydroxide solution was 30%, and the ratio of talcum powder and sodium hydroxide solution was 10g:150mL; hydroxylated talc powder, The dosage ratio of 3-aminopropyltrimethoxysilane, ethanol and deionized water is 10g: 2g: 75mL: 10mL;

[0034] Step S12, mix p-hydroxybenzaldehyde and absolute ethanol, then add aminoated talc powder, heat and reflux for 4 hours, after...

Embodiment 3

[0037] Prepare the filler:

[0038] Step S11, mix talc powder and sodium hydroxide solution, stir at 90°C for 6h, then cool to room temperature, filter, wash with deionized water, after washing, dry at 80°C to constant weight to obtain hydroxyl To talcum powder, mix hydroxylated talc powder, ethanol and deionized water, adjust the pH value to 4 with acetic acid, disperse ultrasonically for 30 minutes, then add 3-aminopropyltrimethoxysilane, and react for 6 hours at 85°C. After the reaction, cooling, centrifugal washing, and drying were performed to obtain aminoated talcum powder; wherein, the mass fraction of sodium hydroxide solution was 30%, and the ratio of talcum powder and sodium hydroxide solution was 10g:150mL; hydroxylated talc powder, The dosage ratio of 3-aminopropyltrimethoxysilane, ethanol and deionized water is 10g: 2g: 75mL: 10mL;

[0039] Step S12, mix p-hydroxybenzaldehyde and absolute ethanol, then add aminoated talc powder, heat and reflux for 4 hours, after t...

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Abstract

The invention relates to a flame-retardant polyolefin composition and a preparation method thereof, and belongs to the technical field of olefin resin. The composition comprises 100 parts of polyolefin resin, 5-8 parts of a flame retardant and 6-10 parts of a processing aid, and the processing aid comprises 2-5 parts of a compatibilizer, 0.5-1 part of a lubricant and 6-8 parts of a filler. The preparation method comprises the following steps: uniformly mixing the polyolefin resin, the flame retardant and the processing aid, and extruding and granulating to obtain the flame-retardant polyolefin composition. According to the filler, talcum powder serves as a raw material and is modified through a common silane coupling agent, a rigid C=N imino group of Schiff base is introduced, and resonance stability has a good promoting effect on the thermal stability of a polymer; and then a phosphorus-containing reactant is introduced, namely, a phosphate flame-retardant structure is introduced, so that a synergistic effect is achieved on the flame-retardant effect of the talcum powder, and meanwhile, the compatibility between the talcum powder and a polymer is improved.

Description

technical field [0001] The invention belongs to the technical field of olefin resins, and in particular relates to a flame-retardant polyolefin composition and a preparation method thereof. Background technique [0002] Polyolefin resins include polyethylene, polypropylene, polyvinyl acetate and various olefin copolymers, among which polypropylene has become one of the most widely used general-purpose plastics due to its excellent comprehensive performance, good cost performance, and wide processing and molding conditions. one. Most polyolefin resins are flammable materials. For example, the limiting oxygen index of polypropylene is 17-18%. Flame retardant modification is required. [0003] At present, the flame-retardant polypropylene technology is mainly based on the compound system of halogen and antimony trioxide, which has a good flame-retardant effect, but has the disadvantages of large smoke volume and toxic gas release during combustion, which is easy to cause seco...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L51/06C08L43/02C08K9/06C08K3/34
CPCC08L23/12C08L2201/02C08L2201/08C08L51/06C08L43/02C08K9/06C08K3/34
Inventor 孟洪量吴言张园园潘晓东胡雁
Owner 湖南省新基源新材料科技有限公司
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