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Novel modified PA66 (polyamide 66) material and preparation method thereof

A PA66, modified technology, applied in the coating and other directions, can solve the problems of high molding shrinkage, easy embrittlement, etc., and achieve the effects of low molding shrinkage, low water absorption, and lowering low temperature embrittlement temperature

Inactive Publication Date: 2015-02-18
HANCHUN SMALL SHENLONG BABY PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of high water absorption, high molding shrinkage, easy embrittlement at low temperature, and only partial modification when the irradiated material is thick, the present invention provides a low water absorption, molding shrinkage Modified PA66 material with low rate, low temperature resistance to embrittlement, and full modification even when the irradiated material is thick, and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032]The preparation method of the modified PA66 material sequentially includes the preparation process of active nano-calcium carbonate, the preparation technology of mixed material particles, the drying process, the injection molding process and the irradiation modification process. The raw materials include nano-calcium carbonate, liquid paraffin oil and titanate coupling agent TC-114. The product obtained by the preparation process of the active nano-calcium carbonate is active nano-calcium carbonate. In the preparation process of the mixed material particles, PA66, Active nano-calcium carbonate, toughening agent, cross-linking sensitizer, cross-linking assistant, main antioxidant, auxiliary antioxidant and lubricant are used as raw materials, and the product obtained by the preparation process of the mixture particles is the mixture particles , the mixed material particles are subjected to a drying process and an injection molding process to obtain injection molding parts...

Embodiment 1

[0054] A modified PA66 material, the raw material composition and weight ratio of the modified PA66 material are: PA66 50, nano calcium carbonate 20, liquid paraffin oil 0.2, titanate coupling agent TC-114 0.2, toughening agent 20 , cross-linking sensitizer 1, cross-linking auxiliary agent 0.5, main antioxidant 0.5, auxiliary antioxidant 0.3, lubricant 1, the toughening agent is ethylene-octene copolymer POE, the cross-linking sensitizer The agent is trimethylolpropane trimethacrylate TMPTMA, and the crosslinking aid is CuI 2 , the main antioxidant is antioxidant 1010, the auxiliary antioxidant is antioxidant 168, and the lubricant is polyethylene wax;

[0055] The preparation method of the above-mentioned modified PA66 material sequentially includes the following processes:

[0056] The preparation process of active nano-calcium carbonate: firstly, the nano-calcium carbonate is added to the high-speed mixer, then the high-speed mixer is started to form the nano-calcium carbo...

Embodiment 2

[0062] The steps are the same as those in Example 1, except that the irradiation dose is 7 megarads. The tensile strength of the prepared modified PA66 material is 99MPa, the bending strength is 108MPa, and the impact strength is 420KJ m -2 , the notched impact strength is 78.6KJ m -2 , the heat distortion temperature is 210 ℃, the low temperature embrittlement temperature is -50 ℃, the water absorption rate is 0%, and the molding shrinkage rate is 0.5%.

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Abstract

The invention relates to a novel modified PA66 (polyamide 66) material. The novel modified PA66 material comprises the following components in parts by weight: 50-80 parts of PA66, 20-30 parts of nano calcium carbonate, 0.2-0.3 part of liquid paraffin oil, 0.2-0.3 part of titanate coupler TC-114, 20-30 parts of toughening agent, 1-2 parts of crosslinking sensitizer, 0.5-1 part of crosslinking auxiliary, 0.5-0.8 part of main antioxidant, 0.3-0.5 part of auxiliary antioxidant and 1-2 parts of lubricating agent; and the preparation method of the novel modified PA66 material sequentially comprises a preparation process of active nano calcium carbonate, a preparation process of mixed material granules, a drying process, an injection moulding process and an irradiation modification process, wherein irradiation dose of an electron accelerator in the irradiation modification process is 5-8Mrad. The modified PA66 material prepared by the invention has stronger toughness and heat resistance, hardly tenders at low temperature and is lower in water absorption ratio and moulding shrinkage; besides, complete modification can also be realized when an irradiated material is thicker.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, in particular to a modified PA66 material and a preparation method thereof. Background technique [0002] Nylon (PA) is a polymer material with the largest output, the largest variety and the widest application field among the five engineering plastics. Polyhexamethylene adipamide (PA66) has the advantages of excellent mechanical properties, wear resistance, self-lubrication, corrosion resistance, light weight, environmental protection and non-toxicity, and is widely used in chemical industry, automobile, construction, machinery, Research and other industries. However, PA66 has its own shortcomings, such as low impact strength at low temperature, poor toughness, high molding shrinkage, high cost, high water absorption, etc. Therefore, unmodified PA66 needs to be used in mechanical, electronic and other fields. Its ductility, notched impact strength and low temperature toughness are mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08K13/06C08K9/04C08K3/26C08K5/103C08K3/16C08J3/28C08J3/24B29C45/00B29B9/06B29B13/06B29C47/92B29C45/78B29C45/77B29C48/92
CPCB29C47/92B29C48/04B29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 罗九斤王树清
Owner HANCHUN SMALL SHENLONG BABY PROD
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