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Halogen-free flame-retardant nylon 66 composition and preparation method thereof

A technology of flame-retardant nylon and its composition, which is applied in the field of flame-retardant materials, can solve the problems of easy collapse and low melt strength of nylon, and achieve the effects of not easy to collapse, good flame-retardant effect, and improved melt strength

Pending Publication Date: 2022-04-12
合肥科拜尔新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melamine cyanurate flame retardant has high requirements on the addition amount, which needs to be more than 14%, and the melt strength of nylon itself is low, and it is easy to collapse during combustion, which will cause cotton to burn and promote further combustion of the material

Method used

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  • Halogen-free flame-retardant nylon 66 composition and preparation method thereof
  • Halogen-free flame-retardant nylon 66 composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 88.35kg nylon 66, 7kg melamine cyanurate, 0.25kg lubricant, 0.4kg antioxidant, 1kgNi 2 o 3 , 3kg of liquid silicone rubber, after blending, melt, mix and disperse in a twin-screw extruder with a length-to-diameter ratio of 38:1, extrude and granulate, and the temperature of each section from the feeding port to the machine head is 240°C in the first zone and 240 in the second zone. Zone 270°C, Zone 3 275°C, Zone 4 275°C, Zone 5 270°C, Zone 6 270°C, Zone 7 265°C, Zone 8 265°C, Zone 9 260°C, and finally obtained a halogen-free flame-retardant nylon 66 composition 1 .

Embodiment 2

[0039] 88.35kg nylon 66, 7kg melamine cyanurate, 0.25kg lubricant, 0.4kg antioxidant, 1kgNi 2 o 3 , 3kg of liquid silicone rubber, after blending, melt, mix and disperse in a twin-screw extruder with a length-to-diameter ratio of 42:1, extrude and granulate. Zone 270°C, Zone 3 270°C, Zone 4 280°C, Zone 5 270°C, Zone 6 270°C, Zone 7 270°C, Zone 8 265°C, Zone 9 265°C, and finally obtained a halogen-free flame-retardant nylon 66 composition 2 .

Embodiment 3

[0041] 88.65kg of nylon 66, 6kg of melamine cyanurate, 0.15kg of lubricant, 0.2kg of antioxidant, 1.5kg of Ni 2 o 3 , 3.5kg of liquid silicone rubber, after blending, melt, mix and disperse in a twin-screw extruder with an aspect ratio of 40:1, extrude and granulate. The second zone is 275°C, the third zone is 265°C, the fourth zone is 265°C, the fifth zone is 265°C, the sixth zone is 270°C, the seventh zone is 270°C, the eighth zone is 260°C, and the ninth zone is 260°C, and the halogen-free flame-retardant nylon 66 composition is finally obtained. 3.

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Abstract

The invention discloses a halogen-free flame-retardant nylon 66 composition and a preparation method thereof. The halogen-free flame-retardant nylon 66 composition comprises the following components in parts by weight: 81.1-93.3 parts of nylon 66, 5-10 parts of a halogen-free flame retardant, 0.1-0.3 part of a lubricant, 0.1-0.6 part of an antioxidant, 0.5-3 parts of a flame-retardant synergist and 1-5 parts of liquid silicone rubber. The product provided by the invention has excellent flame-retardant effect and good comprehensive mechanical property, can prepare a modified material with flame-retardant property of UL94 V0 level under the condition that the usage amount of the flame retardant is small, and has obvious cost advantage compared with the traditional flame-retardant material in the market; meanwhile, the halogen-free flame retardant is used, so that the prepared material meets the environment-friendly requirement and can be applied to the fields of automobiles, electronic appliances and the like.

Description

technical field [0001] The invention belongs to the technical field of flame retardant materials, and more specifically relates to a halogen-free flame retardant nylon 66 composition and a preparation method thereof. Background technique [0002] As one of engineering plastics, nylon is widely used. Because of its good rigidity, impact resistance, self-lubrication, oil resistance and other characteristics, it is widely used in automotive parts, electronic appliances, connectors and other fields. With the development of these fields, the requirements for materials are also increasing, and the requirements for the flame retardancy of nylon materials are becoming more and more stringent. [0003] The main method currently used in the field of nylon flame retardant is to add halogen-containing flame retardants to the resin matrix, but halogen-containing flame retardant materials will produce a lot of smoke and toxic gases during the combustion process, causing secondary damage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L83/04C08K3/22C08K5/3492
Inventor 姜之涛郝文涛
Owner 合肥科拜尔新材料股份有限公司
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