Nylon composition and its preparation method
A technology of composition and nylon, applied in the field of nylon composition, can solve the problems of non-provided nylon composition and high water absorption rate of nylon-6, and achieve the effects of good other mechanical properties, good comprehensive performance and high heat discoloration resistance
Inactive Publication Date: 2005-12-28
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0008] It can be seen that although the above patents are related to modified nylon, none of them proposes a relevant improvement method for the high water absorption of nylon-6, nor does it provide a nylon composition that can effectively block water.
Method used
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Experimental program
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Embodiment 1～4
[0037] Polyethylene (produced by Shanghai Petrochemical, trade mark: low density 200J), polyethylene grafted with maleic anhydride (produced by Meichen Plastic Co., Ltd., graft rate 3.5%) and antioxidant (mixed, kneaded by Booth Machine-made masterbatch (kneading temperature 200-230°C). Then mix the masterbatch with nylon 6 (produced by Ube, Japan, brand 1013B), talcum powder (commercially available, 325 mesh pharmaceutical grade), methoxy silicone oil (Beijing Chemical Industry Co., Ltd. No. 3 factory, grade 1000S) are uniformly mixed, and then extruded and granulated by ZSK-25 twin-screw extruder of German WP company. head temperature). The specific formula is shown in Table 1, and the consumption of each component is represented by the parts by weight of 100 parts by weight of nylon 6. After the pellets are dried, they are made into standard specimens by injection molding, and various performance tests are carried out. The test standards and performance results are shown in...
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Abstract
The invention provides a nylon-6 composition with low water absorption, heat and humidity resistance, and boiling water extraction resistance and a preparation method thereof, and relates to the field of modified nylon. The nylon composition of the present invention includes the following components blended: 100 parts by weight of nylon-6 resin, 3 to 13 parts by weight of maleic anhydride or glycerol acrylate grafted polyethylene, 3 to 10 parts by weight of polyethylene and composite anti- 0.3-3 parts by weight of oxygen agent. The antioxidant is selected from hindered phenolic antioxidants, phosphite antioxidants, or a mixture of both. Among them, polyethylene, grafted polyethylene and antioxidant can be added in the form of masterbatch. The preparation method of the nylon composition of the present invention has a simple process, and the obtained nylon-6 composition has lower water absorption rate, higher heat discoloration resistance and boiling water extraction resistance, and its water absorption rate is 0.8-1.1%; After being boiled in boiling water at 100°C for 16 hours and baked in an oven at 120°C for 8 hours, the product does not change color; the average size change is less than 0.8mm. It is mainly used in the fields of electronics and electrical appliances.
Description
technical field [0001] The present invention relates to a nylon composition, more particularly, relates to a nylon-6 composition which is resistant to water boiling and has high barrier property to water and a preparation method thereof. Background technique [0002] Nylon-6 has excellent comprehensive performance, excellent wear resistance, self-lubrication, heat resistance, low temperature resistance and high mechanical strength, and can resist various chemicals such as hydrocarbons, ketones, esters (including phosphates) , Oil resistance is particularly excellent. However, due to its high water absorption rate, poor barrier property to water, and poor dimensional stability after water absorption, nylon-6 is greatly restricted in its application in harsh environments such as humidity and heat. [0003] Therefore, many companies at home and abroad are scrambling to develop nylon-6 composites with barrier properties. The research directions include direct synthesis, glass ...
Claims
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IPC IPC(8): C08K5/524C08L77/00
Inventor 丁树岩金滟蔡涛李杰郭世华骆嘉瑛郑同利张静
Owner CHINA PETROLEUM & CHEM CORP