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Preparation method of calcium sulfate whisker filled halogen-free flame retardant nylon alloy material

A technology of calcium sulfate whiskers and alloy materials, which is applied in the field of polymer material preparation, can solve problems such as toxic fumes and affect environmental protection, and achieve the effects of excellent heat resistance, short process steps, and less demanding equipment requirements and operation requirements.

Inactive Publication Date: 2012-10-24
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

In order to make this nylon warp alloy material reflect flame retardancy, halogen-containing flame retardants are usually added, but when the halogen-containing flame retardants are burned, toxic smoke is likely to be produced, which affects environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A) To prepare pellets, first weigh 210 parts of nylon 66 resin with a melting point of 250°C in parts by weight, 90 parts of polyethylene resin grafted with maleic anhydride as a compatibilizer, and N -5 parts of β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, 70 parts of calcium sulfate whiskers with a surface-treated aspect ratio of 120 to 150, and phosphate, namely melamine pyrophosphate Put 30 parts of salt into the mixer and mix for 20min. The mixer speed is 400n / min, and then put into the antioxidant that is weighed by parts by weight, that is, N, N'-bis-[3-(3,5-di-tert-butyl -4-hydroxyphenyl) propionyl] 0.8 parts of hexamethylenediamine, 150 parts of alkali-free chopped glass fibers with a length of 3 mm and 0.5 parts of surface modifier, i.e. bis stearic acid amide, and continue mixing for 12 minutes to obtain granules ;

[0018] B) Granulation, put the granulated material obtained in step A) into the twin-screw extruder to melt and extrude, the temperature ...

Embodiment 2

[0020] A) To prepare pellets, first weigh 250 parts of nylon 66 resin with a melting point of 250°C in parts by weight, 70 parts of polyethylene resin grafted with maleic anhydride as a compatibilizer, and N - 3 parts of β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, 60 parts of surface-treated calcium sulfate whiskers with an aspect ratio of 120 to 150, and phosphate, namely melamine pyrophosphate 35 parts of salt are put into the mixer and mixed for 15min, the mixer speed is 600n / min, and then the antioxidant that is weighed by parts by weight is put into N, N′-bis-[3-(3,5-di-tert-butyl 1.4 parts of -4-hydroxyphenyl)propionyl]hexamethylenediamine, 130 parts of alkali-free chopped glass fiber with a length of 3mm and 0.7 part of surface modifier, i.e., bisstearic acid amide, and continue mixing for 6min to obtain granulated material . All the other are the same as the description to embodiment 1.

Embodiment 3

[0022] A) To prepare pellets, first weigh 235 parts of nylon 66 resin with a melting point of 250°C in parts by weight, 65 parts of polyethylene resin grafted with maleic anhydride as a compatibilizer, and N - 3.5 parts of β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane, 80 parts of calcium sulfate whiskers with a surface-treated aspect ratio of 120 to 150, and phosphate, namely melamine pyrophosphate Put 45 parts of salt into the mixer and mix for 25min. The mixer speed is 500n / min, and then put into the antioxidant that is weighed by parts by weight, that is, N, N′-bis-[3-(3,5-di-tert-butyl -4-hydroxyphenyl) propionyl] 0.9 parts of hexamethylenediamine, 160 parts of alkali-free chopped glass fiber with a length of 3 mm and 0.9 part of surface modifier, i.e. bis stearic acid amide, and continue mixing for 8 minutes to obtain granulated material . All the other are the same as the description to embodiment 1.

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Abstract

Belonging to the technical field of high polymer material preparation, the invention provides a preparation method of a calcium sulfate whisker filled halogen-free flame retardant nylon alloy material. The method comprises the steps of: first putting 210-250 parts of nylon 66 resin, 70-79 parts of a compatilizer, 3-5 parts of a coupling agent, 60-80 parts of calcium sulfate whiskers, and 30-50 parts of a phosphate that are weighed by weight into a mixer for mixing, then putting 0.9-1.8 parts of an antioxidant, 130-170 parts of a chopped glass fiber, and 0.5-1.2 parts of a surface modifier that are weighed by weight into the mixer for further mixing for 6-12min, thus obtaining the granulation material; and putting the granulation material into a twin-screw extruder for melt extrusion, and setting the temperature of each zone of the screws, thus obtaining the calcium sulfate whisker filled halogen-free flame retardant nylon alloy material. The method provided in the invention has the advantages of: brief technological steps, and undemanding equipment and operation requirements. The nylon alloy material prepared by the method of the invention has excellent heat resistance, and is halogen free, thus reflecting green and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a preparation method of a halogen-free flame-retardant nylon alloy material filled with calcium sulfate whiskers. Background technique [0002] Nylon is an excellent resin that forms a good alloy with polyethylene. In order to make this nylon warp alloy material exhibit flame retardancy, a halogen-containing flame retardant is usually added, but when the halogen-containing flame retardant is burned, it is easy to produce toxic smoke, which affects environmental protection. Therefore, how to make nylon alloy materials embody green and environmental protection so that they can be safely applied to fields such as construction, electronics, and automobiles has always attracted people's attention. For this reason, the applicant actively explores, and the technical solutions to be introduced below are produced under this background. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L51/06C08K13/06C08K7/08C08K3/30C08K7/14C08K5/544C08K5/3492B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895
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
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