Modified intumescent flame-retardant polypropylene composition and preparation method thereof

A polypropylene composition and an intumescent flame retardant technology are applied in the fields of nano-zinc oxide modified intumescent flame retardant polypropylene composition and preparation thereof, modified intumescent flame retardant polypropylene composition and preparation thereof, polypropylene composition field, It can solve the problems of decreased mechanical properties, poor dispersion and poor compatibility, and achieve the effects of improving mechanical properties, improving flame retardant efficiency and excellent flame retardant performance.

Inactive Publication Date: 2013-10-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Intumescent flame retardant (IFR) is a newly researched halogen-free and environmentally friendly flame retardant. It has a wide range of sources and high flame retardant efficiency. Compared with other flame retardants, its addition amount is not much, but the disadvantages of using it to flame-retardant PP / EPDM system It is very obvious that the compatibility with PP is poor, the dispersion is poor, and the water resistance is poor, resulting in a rapid decline in mechanical properties

Method used

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  • Modified intumescent flame-retardant polypropylene composition and preparation method thereof
  • Modified intumescent flame-retardant polypropylene composition and preparation method thereof
  • Modified intumescent flame-retardant polypropylene composition and preparation method thereof

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Embodiment 1-8

[0026] In terms of parts by mass, each raw material was weighed as shown in Table 1 for Examples 1-8. Example 9 in Table 1 is a comparative example. The toughening agent is one or more of ethylene propylene diene monomer (EPDM), ethylene octene copolymer (POE) or styrene butadiene block copolymer (SBS). The compound intumescent flame retardant (IFR) is composed of high ammonium polyphosphate (APP), dipentaerythritol (DPER), and melamine (MEL) in a mass ratio of 40-60:10-15:15-20; among them, high Ammonium polyphosphate is selected from type II ammonium polyphosphate with a high degree of polymerization, and the degree of polymerization n>100; the purity of melamine is analytically pure; when preparing, firstly mix high ammonium polyphosphate (APP), dipentaerythritol (DPER) and melamine (MEL) Prepare an intumescent flame retardant (IFR) in proportion, dry in an oven at 90-110°C for 5-10 hours, and set aside; then mix nano-ZnO (nano-ZnO), compound intumescent flame retardant (I...

Embodiment 1

[0030] The preparation method of embodiment 1

[0031] A preparation method of a modified expanded flame-retardant polypropylene composition, comprising the steps of:

[0032] (1) Prepare APP, DPER and MEL in proportion to make intumescent flame retardant IFR, dry in an oven at 100°C for 5 hours, and set aside.

[0033] (2) Weigh nano-ZnO, IFR, A-172, and PE wax according to the ratio in Table 1 and put them into a high-speed mixer (GH100Y, produced by Beijing Plastic Machinery Factory) and mix them for 20 minutes to obtain surface modification. Composite flame retardant IFR / nano-ZnO.

[0034] (3) Add the modified IFR / nano-ZnO, PP, and EPDM into a high-speed mixer (GH100Y, produced by Beijing Plastic Machinery Factory) according to the ratio in Table 1, and then use a three-screw extruder to extrude and make pellets to obtain modified expanded flame-retardant polypropylene composition pellets. The three-screw extruder is divided into a solid conveying zone, a solid-solution ...

Embodiment 2

[0035] The preparation method of embodiment 2

[0036] A preparation method of a modified expanded flame-retardant polypropylene composition, comprising the steps of:

[0037](1) Prepare APP, DPER and MEL in proportion to make intumescent flame retardant IFR, dry in an oven at 100°C for 5 hours, and set aside.

[0038] (2) Weigh nano-ZnO, IFR, A-172, and PE wax according to the ratio in Table 1 and put them into a high-speed mixer (GH100Y, produced by Beijing Plastic Machinery Factory) and mix them for 20 minutes to obtain surface modification. Composite flame retardant IFR / nano-ZnO.

[0039] (3) Add the modified IFR / nano-ZnO, PP, and EPDM into a high-speed mixer (GH100Y, produced by Beijing Plastic Machinery Factory) according to the ratio in Table 1, and then use a three-screw extruder to extrude and make pellets to obtain modified expanded flame-retardant polypropylene composition pellets. The three-screw extruder is divided into a solid conveying zone, a solid-solution m...

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Abstract

The invention discloses a modified intumescent flame-retardant polypropylene composition and a preparation method thereof. The modified intumescent flame-retardant polypropylene composition is prepared from the following raw materials in parts by weight: 55-70 parts of polypropylene, 5-15 parts of toughener, 15-30 parts of compound intumescent flame retardant (IFR), 1-3.5 parts of nano zinc oxide, 0.1-0.2 part of vinyl silane coupling agent and 0.1-0.2 part of polyethylene wax. The preparation method comprises the following steps: proportionally preparing ammonium polyphosphate, bis-pentaerythritol and melamine into an IFR, drying, and mixing the nano zinc oxide, compound IFR, vinyl silane coupling agent and polyethylene wax to obtain the compound flame retardant; and mixing the surface-modified compound flame retardant, polypropylene and toughener, and extruding and granulating by a triple-screw extruder to obtain the modified intumescent flame-retardant polypropylene composition. The modified intumescent flame-retardant polypropylene composition disclosed by the invention can obviously enhance the flame-retardant efficiency of the IFR, and greatly enhances the mechanical properties of the polypropylene composition.

Description

technical field [0001] The present invention relates to a polypropylene composition; in particular to a modified intumescent flame-retardant polypropylene composition and a preparation method thereof; in particular to a nano-zinc oxide modified intumescent flame-retardant polypropylene composition and a preparation method thereof; It belongs to the technical field of polymer materials. Background technique [0002] Polypropylene (PP) is one of the four general-purpose plastics, second only to polyethylene and polyvinyl chloride, and ranks third in general-purpose plastics. Its wide applicability and low cost make it one of the largest and fastest growing plastics. But its notched impact toughness is poor, and it is brittle at low temperature. [0003] Thermoplastic elastomer (TPE) has the characteristics of both plastic and rubber. It has the elasticity and toughness of traditional rubber at room temperature, and it will soften after heating up. It can be easily processed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08L23/08C08L53/02C08K13/02C08K3/32C08K5/053C08K5/3492C08K3/22C08K5/5425B29C47/92B29C48/425B29C48/92
CPCB29K2105/0026B29C48/022B29C48/04B29C48/425
Inventor 文劲松亢本昊陈如锋陈逸新雷绍阔吴正环
Owner SOUTH CHINA UNIV OF TECH
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