A preparation method of a halogen-free flame-retardant super-tough nylon 6 composite material
A composite material and super-tough technology, applied in the field of preparation of organic polymer compounds, can solve the problems of poor flame retardant effect and poor compatibility of nylon 6 composite materials
Active Publication Date: 2019-04-02
GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD
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Problems solved by technology
[0005] The present invention intends to provide a method for preparing a halogen-free flame-retardant super-tough nylon 6 composite material, which solves the technical problems of poor compatibility and poor flame-retardant effect of the nylon 6 composite material prepared by the existing preparation method
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[0030] Taking Example 1 as an example to specifically illustrate a method for preparing a halogen-free flame-retardant super-tough nylon 6 composite material of the present invention, which includes the following steps in turn:
[0031] 1) Melt 2500g of caprolactam at 100°C, then add 12.5g of ethyl orthosilicate to hydrolyze for 4 hours at this temperature to generate silicon dioxide;
[0032] 2), raise the temperature to 200°C, control the pressure in the reactor to 1Mpa, add 81.6g melamine and 87.6g cyanuric acid to the melt in step 1), stir, and generate MCA-SiO in situ 2 Core-shell structure, and pre-polymerization, reaction 3h;
[0033] 3) Raise the temperature to 220°C, evacuate the reactor until the internal vacuum is 0.08MPa, and carry out the reduced-pressure compression polymerization reaction of caprolactam, and the reaction time is 3 hours;
[0034] 4), add 3g of triglycidyl isocyanurate, continue to react for 2 hours, and get a semi-finished product;
[0035] 5)...
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The invention belongs to the technical field of preparation of organic high-molecular compounds, and discloses a preparation method of a halogen-free flame-retardant super-toughened nylon 6 composite material. The preparation method sequentially comprises the following steps: 1) melting caprolactam at a temperature of 75-150 DEG C, and adding a modifying agent to hydrolyze for 3.5-5 hours, wherein the modifying agent is one of normal silicate ester, silicate or orthosilicic acid; 2) adding melamine and cyanuric acid to perform in-situ pre-polymerization, wherein a molar ratio of the melamine to the cyanuric acid is 1 to 1, a reaction temperature is 180-260 DEG C, reaction pressure is 0.6-1.5 Mpa and reaction time is 1-5 hours; 3) rising the temperature to 200-280 DEG C, and performing vacuum-pumping to perform decompression polycondensation, wherein reaction time is 1-5 hours; 4) adding a molecular weight modifier and continuously reacting for 1-3 hours to obtain a semi-finished product; and 5) cooling, crushing, washing and drying the semi-finished product, thereby obtaining a finished product. The preparation method of the halogen-free flame-retardant super-toughened nylon 6 composite material provided by the invention solves the technical problems such as poor compatibility and a poor flame retardant effect of a nylon 6 composite material prepared by an existing preparation method.
Description
technical field [0001] The invention belongs to the technical field of preparation of organic polymer compounds, and in particular relates to a preparation method of a halogen-free flame-retardant super-tough nylon 6 composite material. Background technique [0002] Nylon 6 is polycaprolactam, also known as PA6, which is translucent or opaque milky white crystal. It has the advantages of low density, high tensile bending strength and notched impact strength, high thermal decomposition temperature and melting point, especially good wear resistance, Self-lubricating and solvent-resistant, it has been widely used in machinery, transportation, national defense and other fields, and has become one of the very important engineering plastics. [0003] At present, with the emergence of a large number of functional products, the application range of PA6 is increasing, and its use environment is becoming more and more harsh. It is often used in flammable, explosive, corrosive and high...
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IPC IPC(8): C08G69/16C08K9/10C08K3/36
CPCC08G69/16C08K3/36C08K9/10C08L2201/02C08L2201/22
Inventor 吴浪魏珊珊陈旭东唐孝芬杜惠娟李素英张奇
Owner GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD