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Copolymerized nylon 612 material
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A technology of copolymerizing nylon and nylon, which is applied in the field of materials, and can solve the problems of reduced rigidity, surface brightness, and chemical resistance that need to be improved.
Inactive Publication Date: 2020-04-03
SHANDONG DONGCHEN ENG PLASTIC
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Problems solved by technology
However, the rigidity of the product prepared by this patent is significantly reduced, and the surface brightness and chemical resistance still need to be improved.
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Embodiment 1
[0035] Example 1: Preparation of Copolymerized Nylon 612A
[0037] 1. Weigh 9.7 kg of nylon 612 monomer, 0.3 kg of nylon 6I monomer, 8 g of antioxidant, and 10 kg of distilled water into a 27L reactor, heat up to 90-105°C, start stirring, and react for 0.5 hours , continue to heat up to 205-260°C, when the pressure reaches 1.5-1.8MPa, react for 2-4 hours, then maintain the temperature at 205-260°C and exhaust to normal pressure, the reaction ends.
[0038] 2. Inject carbon dioxide or other inert gas to press out the material from the reaction kettle, cool it in a water tank, and drag it to a pelletizer for pelletizing to obtain the copolymerized nylon 612A product.
experiment example 1
[0039] Experimental example 1: Product performance test of copolymerized nylon 612A
[0040] After drying the copolymerized nylon 612A prepared in Example 1, use an injection molding machine to make various standard specimens, and place it for 24 hours for testing; injection molding machine temperature: 230°C, 235°C, 235°C; injection speed 60g / s, injection time 12s, The injection pressure is 36MPa, the holding pressure is 28MPa, and the holding time is 25s.
[0041] The test results are as follows:
[0042]
[0043]
Embodiment 2
[0044] Embodiment two: the preparation of copolymerized nylon 612B
[0045] Raw materials: nylon 612 monomer: 88 parts, nylon 6I monomer 12 parts, antioxidant 0.2 parts, distilled water: 100 parts
[0046] 1. Weigh 8.8 kg of nylon 612 monomer, 1.2 kg of nylon 6I monomer, 20 grams of antioxidant, and 10 kg of distilled water into a 27L reactor, heat up to 90-105°C, start stirring, and react for 0.5 hours , continue to heat up to 205-260°C, when the pressure reaches 1.5-1.8MPa, react for 2-4 hours, then maintain the temperature at 205-260°C and exhaust to normal pressure, the reaction ends.
[0047] 2. Inject carbon dioxide or other inert gas to press the material out of the reaction kettle, cool it in a water tank, and drag it to a pelletizer for pelletizing to obtain the copolymerized nylon 612B product.
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Abstract
The invention provides a copolymerized nylon 612 material. The copolymerized nylon 612 material is prepared from the following raw material components in parts by weight: 88-97 parts of a nylon 612 monomer, 3-12 parts of a nylon 6I monomer, 0.08 to 0.2 parts of an antioxidant and 100 parts of distilled water. Compared with the prior art, the product prepared by the invention has good surface brightness, good rigidity, a small molding shrinkage rate and good chemical resistance, can meet normal application, and can also be expanded and applied to precision products such as highlight spraying-free chemical solvent with coating resistance and the like; besides, the preparation method is simple, all reactions are carried out in one reaction kettle, and compared with the prior art, the processes of salt preparation, concentration and the like are omitted, so that the preparation method has obvious advantages in economy, environment and operation.
Description
technical field [0001] The invention relates to a copolymerized nylon 612 material, which belongs to the technical field of materials. Background technique [0002] Nylon 612, also known as polyamide 612 or PA612, has the characteristics of tensile strength, impact strength, fatigue resistance, and abrasion resistance. It also has the advantages of low water absorption, low density, and good dimensional stability. It is mainly used to prepare high-grade toothbrushes and other industrial bristles. It can also be used to make precision mechanical parts and wire and cable coatings, oil pipelines, oil-resistant ropes, liners, etc. It can be used to make gun stocks, steel helmets, and military cables in military industry. The methods currently used to prepare nylon 612 mainly include alcoholsolvent method and water solvent method. The nylon 612 prepared by the alcohol solvent method has excellent comprehensive performance, but the process route is relatively long, and due to th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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