Non-halogen flame-retardant polypropylene composite material and preparation thereof

A flame retardant polypropylene and composite material technology, applied in the field of halogen-free flame retardant polypropylene composite material and its preparation, polypropylene composite material and its preparation field, can solve the problem of large amount of addition and great impact on mechanical properties of polypropylene. , reducing flame retardant properties and other issues, to achieve the effects of high heat distortion temperature, good comprehensive mechanical properties, and low shrinkage rate

Inactive Publication Date: 2009-04-22
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, polypropylene halogen-free flame retardant products with flame retardant properties reaching UL94 V-0 level have been industrialized, but because polypropylene uses intumescent flame retardants, the addition amount is large, which affects the mechanical properties of polypropylene, especially the impact properties. Therefore, there is an urgent need for a polypropylene composite material whose mechanical properties are comparable to those of acrylonitrile-butadiene-styrene copolymers without reducing the flame retardancy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 82.5 parts by weight of polypropylene with a molecular weight of 150,000, heat stabilizer 1,3,5-trimethyl-2,4,6-three (3,5-di-tert-butyl-4-hydroxybenzyl) Benzene (trade name Irganox 1010, produced by Switzerland Ciba Specialty Chemicals AG) 0.3 parts by weight, processing aid butyl stearate 0.2 parts by weight, toughening agent ethylene-propylene-butadiene terpolymer 1 parts by weight 10 parts by weight of flame retardant ammonium polyphosphate, 1 part by weight of glass fiber compatibilizer glycidyl methacrylate (GMA) grafted polypropylene are melted in a twin-screw extruder with an aspect ratio of 45:1 Mixing and dispersing, adding 5 parts by weight of alkali-free glass fiber from side feeding, extruding and granulating at 170°C.

[0038] The above products have excellent flame retardant effect, good comprehensive mechanical properties, low shrinkage rate and high heat distortion temperature. The flame retardant performance can reach 1.6mm V0, and the tensile strength...

Embodiment 2

[0040] 12 weight parts of polypropylene with a molecular weight of 150,000, 2 weight parts of heat stabilizer bisphenol A, 1 weight part of processing aid monoglyceride stearate, and 10 weight parts of a copolymer of toughening agent styrene and butadiene part, 40 parts by weight of flame retardant pentaerythritol, 5 parts by weight of glass fiber compatibilizer maleic anhydride grafted polyethylene in the twin-screw extruder that length-to-diameter ratio is 35:1 melt mixing dispersion, alkali-free glass fiber 30 weight parts Portions were added from side feed and extrusion pelletized at 240°C.

[0041]The above products have excellent flame retardant effect, good comprehensive mechanical properties, low shrinkage rate and high heat distortion temperature. The flame retardant performance can reach 2.0mm V0, and the tensile strength (ISO527 / 2-93) is 58MPa , flexural strength (ISO178-93) is 85MPa, elongation at break (ISO527 / 2-93) is 4%, flexural modulus (ISO178-93) is 3300MPa, ...

Embodiment 3

[0043] 50 parts by weight of polypropylene with a molecular weight of 150,000, 1 part by weight of heat stabilizer bisphenol C, 0.5 part by weight of glyceryl tristearate as a processing aid, and 5 parts by weight of a copolymer of styrene and butadiene as a toughening agent Parts by weight, 25 parts by weight of flame retardant dipentaerythritol, 3 parts by weight of glass fiber compatibilizer fumaric acid grafted polypropylene in a twin-screw extruder with a length-to-diameter ratio of 40:1, melt-mixed and dispersed, alkali-free glass fiber 20 parts by weight were added from the side feeding, extruded and granulated at 200°C.

[0044] The above products have excellent flame retardant effect, good comprehensive mechanical properties, low shrinkage rate and high heat distortion temperature. The flame retardant performance can reach 1.6mm V0, and the tensile strength (ISO527 / 2-93) is 57MPa , flexural strength (ISO178-93) is 87MPa, elongation at break (ISO527 / 2-93) is 5%, flexur...

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Abstract

The invention provides a halogen-free flame-retardant polypropylene composite material, which is characterized by consisting of the following raw materials in weight portion: 82.5 to 12 portions of polypropylene, 0.3 to 2 portions of heat stabilizer, 0.2 to 1 portion of processing aid, 1 to 10 portions of toughening agent, 10 to 40 portions of flame retardant, 1 to 5 portions of glass fiber compatibilizer and 5 to 30 portions of glass fiber. The invention also provides a method for preparing the material. The material has the flame retardancy up to 1.6mm V0, the tensile strength higher than or equal to 50 MPa, the flexural modulus higher than or equal to 3,000 MPa, the notched impact strength more than or equal to 8KJ/m<2>, the shrinkage between 4 and 6 per thousand, the heat distortion temperature higher than or equal to 140 DEG C, as well as the other technical indexes up to or exceeding the standard of flame-retardant acrylonitrile-butadiene-styrene copolymer materials. As the material uses the phosphorus-nitrogen flame retardant containing no halogen, the flame-retardant effect of the material completely reaches UL94-V0 grade.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant polypropylene composite material and a preparation method thereof, in particular to a polypropylene composite material with high flame retardancy, low shrinkage rate and excellent comprehensive mechanical properties used in the field of household appliances and a preparation method thereof, belonging to Polymer material technology field. Background technique [0002] Acrylonitrile-butadiene-styrene copolymer (ABS) plastic is a kind of engineering plastic with excellent performance. Acrylonitrile-butadiene-styrene copolymer resin is a terpolymer of polyacrylonitrile (A), butadiene (B) and styrene (S), and is a thermoplastic engineering plastic developed in the 1940s. It introduces acrylonitrile to retain the rigidity and chemical resistance of acrylonitrile-butadiene-styrene copolymer, and the introduction of butadiene improves the flexibility and impact resistance of acrylonitrile-butadiene-styre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/04C08K7/14B29B9/02B29C47/92B29C47/10C08K3/32C08K5/053C08K3/38C08K5/098C08K5/3492B29C48/92
CPCB29C48/92B29C2948/92704B29C2948/92895
Inventor 孙刚易庆锋王灿耀吉继亮苏妤
Owner SHANGHAI KINGFA SCI & TECH
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