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A nylon resin, polymerized monomer technology, applied in the field of resin, can solve the problems of affecting mechanical properties, low resin viscosity, etc.
Active Publication Date: 2014-04-02
ZHUZHOU TIMES NEW MATERIALS TECH
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However, this patent uses a single carboxyl structure flame retardant, which is equivalent to an end-capping agent in nylon polymerization, so that the viscosity of the prepared resin is low, which in turn affects its mechanical properties
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preparation example Construction
[0024] The embodiment of the present invention discloses a kind of preparation method of nylon resin, comprises the following steps:
[0025] Mix the polymerized monomer, catalyst, reactive flame retardant, and char-forming agent for polycondensation reaction to obtain nylon resin;
[0026] The polymerized monomer includes one or more of compounds containing both amino and carboxyl groups and lactams;
[0027] The reactive flame retardant is one or more of the compounds with the structures of formulas (I) to (IV):
[0028]
[0029] where R 1 is an alkylene group of 1 to 4 carbon atoms, R 2 and R 3 Any selected from -H, -CH 2 COOH,-CH 2 CH 2 COOH,-CH 2 CH 2 CH 2 COOH or an alkyl group with 1 to 4 carbon atoms, preferably R 2 and R 3 not simultaneously an alkyl group of 1 to 18 carbon atoms, R 4 is an alkylene or arylene group of 1 to 12 carbon atoms.
[0030] In the present invention, the nylon resin is prepared from polymerized monomers, catalysts, reactive fla...
Embodiment 1～7
[0043] (1) The polymer monomer, catalyst, reactive flame retardant and char-forming agent are formulated into materials in a certain proportion. See Table 1 for details.
[0044] (2) Put the prepared materials into the high-pressure reaction kettle, close the feeding cover tightly, connect the cooling water of the jacket of the polymerization kettle; pressurize the kettle with high-purity nitrogen to make the pressure in the kettle positive, open the pressure relief valve to evacuate the kettle Reduce the pressure to negative pressure, do this several times, and finally pass high-purity nitrogen to normal pressure, and then close the exhaust valve tightly.
[0045] (3) Heating the high-pressure reactor filled with materials, when the temperature reaches 200°C-280°C and the pressure of the kettle is 0.2Mpa-2.0Mpa, the reaction time is 1h, 3h, 5h, 6h, 8h, 10h, 12h.
[0046] (4) Open the pressure relief valve to reduce the pressure of the kettle to normal pressure, and then the ...
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Abstract
The invention provides a preparation method of nylon resin, which comprises the following steps of mixing a polymer monomer, a catalyst, a reaction type flame retardant and a charring agent, and performing a condensation polymerization reaction to obtain the nylon resin, wherein the polymer monomer is one or more of compounds containing amino and carboxyl and lactam, or the polymer monomer is diacid and diamine; the reaction type flame retardant is one or more of the compounds with the structures of formulas (I)-(IV). According to method provided by the invention, the reaction type flame retardant is a phosphorus-containing flame retardant; after being copolymerized with a monomer, the reaction type flame retardant is stably stored in the polymer without being transferred or lost and has a permanent flame retardant property. Moreover, the reaction type flame retardant is polymerized in a polymer, causes little influence on the viscosity of the nylon resin and has excellent mechanical properties.
Description
technical field [0001] The invention relates to the field of resins, in particular to a nylon resin and a preparation method thereof. Background technique [0002] Polyamide fiber, commonly known as nylon, is a general term for thermoplastic resins containing repeated amide groups on the main molecular chain. With its excellent mechanical properties, friction resistance, heat resistance, electrical insulation and weather resistance, nylon is widely used in textile fibers, automobiles, electronic appliances, construction machinery and other fields. However, its burning speed is fast and its heat release is high, especially when it burns, it produces flaming droplets, which greatly increases the risk of fire transmission and endangers the safety of human production and life. Therefore, the research on its flame retardancy has always been a topic of great concern in the industry. [0003] The flame retardancy of nylon materials is mainly obtained through blending and copolyme...
Claims
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