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Preparation method of green and environmental-friendly black nylon material

A green and environmentally friendly nylon technology, applied in the field of black nylon material preparation, can solve the problems of poor flame retardancy and environmental impact

Inactive Publication Date: 2013-07-24
苏州宇度医疗器械有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, nylon products have poor flame retardancy. In order to make them flame-retardant, some halogen-containing flame retardants are often added. For example, Chinese Patent Publication No. CN10153570A uses decabromodiphenylethane and antimony trioxide as flame retardants. Good flame retardant performance, but it releases toxic smoke when burning and affects the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First, weigh 39 parts by weight of nylon resin with a melting point of 230°C or higher and a viscosity index of 2.4, 12 parts of polypropylene resin with a melting index of 2-6g / 10min and a melting point of 170°C, and maleic anhydride grafted And the grafting rate is 0.8% polypropylene 7 parts, aminopropyl ethoxysilane 0.3 parts, melamine urate 12 parts, melamine pyrophosphate 10 parts, tris(2,4 di-tert-butylbenzene) Base) 0.5 part of phosphite, 26 parts of alkali-free chopped glass fiber with a length of 3mm, and 3 parts of carbon black prepared by the groove method are put into a high-speed mixer and mixed for 12 minutes. The speed of the high-speed mixer is 600n / min to obtain a mixture. Then, the mixture is transferred to a parallel twin-screw extruder for melt extrusion, and the temperature of the first to sixth zones of the screw of the twin-screw extruder are respectively: 210°C in the first zone, 220°C in the second zone, and 230 in the third zone. ℃, 235℃ in four...

Embodiment 2

[0018] First, weighed in parts by weight, 48 parts of nylon resin with a melting point of 230°C or higher and a viscosity index of 2.4, 10 parts of polypropylene resin with a melting index of 2-6g / 10min and a melting point of 170°C, and maleic anhydride grafted And the grafting rate is 0.8% polypropylene 9 parts, aminopropyl ethoxysilane 0.5 parts, melamine urate 9 parts, melamine pyrophosphate 7 parts, tris (2,4 di-tert-butyl benzene Base) 0.7 parts of phosphite, 15 parts of alkali-free chopped glass fibers with a length of 3mm, and 2 parts of carbon black prepared by the groove method are put into a high-speed mixer and mixed for 8 minutes. The speed of the high-speed mixer is 700n / min to obtain a mixture. Then, the mixture is transferred to a parallel twin-screw extruder for melt extrusion, and the temperature of the first to sixth zones of the screw of the twin-screw extruder are respectively: 210°C in the first zone, 220°C in the second zone, and 230 in the third zone. ℃, ...

Embodiment 3

[0020] First, weighed in parts by weight 43 parts nylon resin with a melting point above 230°C and a viscosity index of 2.4, 7 parts polypropylene resin with a melting index of 2-6 g / 10min and a melting point of 170°C, and maleic anhydride grafted And the grafting rate is 0.8% polypropylene 8 parts, aminopropyl ethoxysilane 0.9 parts, melamine urate 17 parts, melamine pyrophosphate 15 parts, tris (2,4 di-tert-butyl benzene Base) 0.4 parts of phosphite, 21 parts of alkali-free chopped glass fibers with a length of 3mm, and 2.5 parts of carbon black prepared by the groove method are put into a high-speed mixer and mixed for 9 minutes. The speed of the high-speed mixer is 680n / min to obtain a mixture. Then, the mixture is transferred to a parallel twin-screw extruder for melt extrusion, and the temperature of the first to sixth zones of the screw of the twin-screw extruder are respectively: 210°C in the first zone, 220°C in the second zone, and 230 in the third zone. ℃, 235℃ in fo...

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Abstract

The invention relates to a preparation method of an environmental-friendly black nylon material, and belongs to the technical field of preparation of high-molecular materials. The preparation method comprises the following steps of: firstly adding the following materials in parts by weight: 39-48 parts of nylon 66 resin, 7-12 parts of polypropylene resin, 6-9 parts of compatilizers, 0.3-0.9 part of coupling agents, 9-17 parts of fire retardants, 7-15 parts of phosphate, 0.3-0.7 parts of antioxidants, 15-26 parts of glass fibers and 2-3 parts of carbon black to a high-speed mixer, and mixing for 8-12 minutes, wherein the rotation speed of the high-speed mixer is 600-700 nanometers / minute; and then transferring a mixture to a parallel double-screw extruder for smelting and extrusion, and respectively controlling the temperature of a screw rod from a first zone to a sixth zone at 210 DEG C in the first zone, at 220 DEG C in a second zone, at 230 DEG C in a third zone, at 235 DEG C in a fourth zone, at 240 DEG C in a fifth zone and at 230 DEG C in the sixth zone to obtain a finished product. The environmental-friendly black nylon material provided by the invention has the advantages that the tensile strength is higher than 120-140 MPa, the bending strength is higher than 210-230 MPa, the cantilever notch impact strength is higher than 11-16 kj / m<2>, and the fire retardance achieves V-0(UL-94-1.6 mm).

Description

Technical field [0001] The invention belongs to the technical field of polymer material preparation, and specifically relates to a method for preparing a green and environmentally friendly black nylon material. Background technique [0002] Nylon is a kind of engineering plastic with a wide range of uses. Due to the shortcomings of pure nylon resin, such as low temperature brittleness, high water absorption, and poor dimensional stability, it has greatly affected the application of pure nylon resin. The modification of nylon resin with polypropylene resin can improve the above-mentioned shortcomings of nylon and improve the toughness of nylon products, which has good practical significance. In addition, nylon products have poor flame retardancy. In order to make them flame retardant, some halogen-containing flame retardants are often added. For example, Chinese Patent Publication No. CN10153570A uses decabromodiphenylethane and antimony trioxide as flame retardants. It has good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L23/12C08L51/06C08K13/04C08K7/14C08K3/32C08K3/04B29C47/92B29C48/92
CPCB29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895
Inventor 陶渭清沈兴元颜卫峰陶立强
Owner 苏州宇度医疗器械有限责任公司