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Halogen-free polyolefin composition and product thereof

A composition and polyolefin technology, applied in the field of halogen-free polyolefin composition, can solve the problems of unsatisfactory surface resistance value, not seen in, unsuitable for coal mine application, etc., achieve excellent flame retardancy and antistatic property, good mechanical performance effect

Inactive Publication Date: 2014-07-16
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN100484993 discloses a halogen-free polypropylene composition, which has excellent flame retardancy and is suitable for manufacturing electrical equipment casings; however, this composition is not suitable for coal mine applications because its surface resistance value does not meet MT113-1995 requirements
However, such high performance polyolefin compositions have not been found in the prior art

Method used

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  • Halogen-free polyolefin composition and product thereof
  • Halogen-free polyolefin composition and product thereof
  • Halogen-free polyolefin composition and product thereof

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preparation example Construction

[0059] Preparation of compositions and articles

[0060] The thermoplastic resins according to the present invention can be prepared by conventional methods known in the art. In an exemplary embodiment, the above components (a), (b) and (c) are mixed with optional thermoplastic elastomer (d), compatibilizer (e), filler (f) and additive (g) The resulting polyolefin composition can then be prepared in the form of pellets (eg pellets) by melt extrusion in a twin-screw extruder, if necessary using a die.

[0061] The thermoplastic resin composition pellets of the present invention can be subjected to injection molding or the like to obtain desired products.

[0062] The halogen-free polyolefin composition of the present invention has excellent flame retardancy and antistatic properties, all of which meet or even exceed the requirements stipulated in MT113-1995, specifically including (i) flame retardancy, flame burning duration8 Ω; and wherein the mechanical strength of the compo...

Embodiment 1

[0074] 73.4 parts by weight of (a) polypropylene homopolymer (MFR=3.5g / 10min, weight average molecular weight approximately equal to 400,000, the same below), 15.5 parts by weight of (b) ammonium polyphosphate (molecular weight of 225,000, the same below) , (c) conductive carbon black (specific surface area 662m 2 / g, the same below) and a total of 1.4 parts by weight containing stearic acid (processing aid, 0.5 parts by weight), 2,6-tert-butyl-4-methylphenol (heat stabilizer, 0.3 parts by weight), poly Mixture of additives of vinyl wax (release agent, molecular weight 6,000, 0.5 parts by weight) and 2,2'-methylenebis(4-methyl-6-tert-butylphenol) (antioxidant, 0.1 parts by weight) Use a twin-screw extruder with a diameter of 36 mm (SHJ-36, Nanjing Jieente Electromechanical Co., Ltd., the same below) to melt and knead at 80 ° C for 30 minutes and pelletize. Then according to the aforementioned standard sample preparation, testing mechanical properties, flame retardancy and anti...

Embodiment 2

[0076] 71 parts by weight of polypropylene homopolymer (MFR=3.5g / 10min, weight average molecular weight equal to about 400,000), 19.7 parts by weight of ammonium polyphosphate (molecular weight of 225,000), 7.9 parts by weight of conductive carbon black and a total of 1.4 Parts by weight contain stearic acid (processing aid, 0.5 parts by weight), 2,6-tert-butyl-4-methylphenol (heat stabilizer, 0.3 parts by weight), polyethylene wax (release agent, molecular weight is 6,000,0.5 parts by weight) and 2,2'-methylene bis(4-methyl-6-tert-butylphenol) (antioxidant, 0.1 parts by weight) of the additive mixture with a diameter of 36mm twin-screw extruder Exit the machine to melt knead and granulate. Then according to the aforementioned standard sample preparation, testing mechanical properties, flame retardancy and antistatic properties, the results are listed in Table 2.

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Abstract

The invention relates to a halogen-free polyolefin composition, which comprises: (a) 25-75wt% of polyolefin resin; (b) 15-65wt% of a halogen-free flame retardant; and (c) 5-10wt% of an antistatic agent. The flame retardant and the antistatic agent of the composition meet the MT113-1995 specified requirements, which include: (i) flame retardance: the flame combustion duration is less than 3S (after removal of an alcohol blast burner), the flameless combustion duration is less than 30s (after removal of the alcohol blast burner), and the flame propagation length is not more than 280mm; and (ii) antistatic property: the surface impedance is less than 10<8>Ohm. And the mechanical strength of the composition meets the requirements of: notched Charpy impact strength of greater than 20kJ / m<2>, tensile strength of greater than 20MPa, and an elastic modulus of greater than or equal to 1100MPa.

Description

technical field [0001] The present invention relates to a halogen-free polyolefin composition, which contains a flame retardant that does not contain halogen atoms. More specifically, the present invention relates to a flame-retardant, antistatic, halogen-free polyolefin composition, which has the advantages of high impact strength, high tensile strength and high elastic modulus. Background technique [0002] Currently, there is a rapidly growing demand for polymeric materials to replace steel and wooden materials, especially polyolefin compositions, which offer advantages such as light weight, chemical resistance, corrosion resistance, and low cost. When polymeric materials are used in coal mining applications, due to safety concerns, the resin used should be flame retardant or self-extinguishing to prevent burning or ignition. In addition, when used in coal mines, the polymer is also required to have antistatic properties, because the accumulation of surface charges can e...

Claims

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Application Information

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IPC IPC(8): C08L23/00C08L23/12C08L53/00C08K13/02C08K3/32C08K3/22C08K3/04C08K5/09C08K5/13C08K5/101
CPCC08L23/12C08K2201/017C08L2201/02C08L2201/04C08L2201/22C08L2203/18C08L2205/03C08L2205/035C08L23/06C08K13/02C08K2003/323C08K3/04C08L23/0815C08L51/06C08K2003/2224
Inventor 马伊梁文斌孙小杰张大伟赖世耀
Owner CHNA ENERGY INVESTMENT CORP LTD
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