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Halogen-free flame-retardant polypropylene pipe and preparation method thereof
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A flame retardant polypropylene, polypropylene technology, applied in the field of PPR flame retardant, can solve the problems of toxic and corrosive gases, human body and environmental hazards, and achieve uniform distribution, prevent combustion, and facilitate combustion.
Active Publication Date: 2022-04-29
LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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[0005]
In view of the above problems, the present invention provides a non-halogen flame retardant polypropylene pipe and its preparation method, which solves the technical problems that the use of traditional halogen flame retardant materials is easy to generate toxic and corrosive gases, and cause harm to the human body and the environment.
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preparation Embodiment 1
[0025] A preparation method of the above-mentioned non-halogen flame-retardant polypropylene pipe, comprising the steps of:
[0026] (1) Preparation of ZnMgAl-LDHs compound; dissolve 0.1mol zinc salt, 0.3mol magnesium salt, and 0.2mol aluminum salt in 250ml deionized water, turn on the magnetic stirring water bath, stir evenly, adjust the pH value to 10.3, and the reaction is completed After standing still, and then performing centrifugation, the obtained precipitate is washed with deionized water, placed in an oven for drying, and after drying, the obtained powder is subjected to grinding treatment to obtain the ZnMgAl-LDHs compound.
[0027] (2) Add polypropylene pellets, maleic anhydride grafted polypropylene, non-halogen flame retardant (aluminophosphate flame retardant, such as aluminum hypophosphite) and ZnMgAl-LDHs compound to the mixer in proportion Mixing in the middle; the speed is 70rpm, the mixing temperature is 180°C, and the mixing time is 8 minutes;
[0028] (3...
preparation Embodiment 2
[0030] In this embodiment, the pH is adjusted to 10.5 in step (1), the mixing parameters in step (2) are 60 rpm, the mixing temperature is 185°C, and the mixing time is 10 minutes; planetary screw is selected in step (3). Extruder, other are with preparation embodiment 1.
preparation Embodiment 3
[0032] In this example, step (1) adjusts the pH to 10.7, the mixing parameters in step (2) are 80 rpm, the mixing temperature is 170° C., and the mixing time is 6 minutes; others are the same as in Preparation Example 1.
[0033] Proportioning example
[0034] Mix maleic anhydride grafted polypropylene (PP-g-MA), non-halogen flame retardant (M) and ZnMgAl-LDHs compound according to different proportions, see Table 1 for the proportion; polypropylene (PP ), maleic anhydride grafted polypropylene (PP-g-MA), non-halogen flame retardant (M) and ZnMgAl-LDHs compound, the proportions are shown in Table 2; mixing is carried out, and after mixing, scrape and mix evenly materials.
[0035] Table 1 Proportion of PP-g-MA / M / LDHs flame retardant materials
[0036]
[0037] Table 1 Proportion of PP / PP-g-MA / M / LDHs flame retardant materials
[0038]
[0039] Taking each proportion as an example, mixing and granulating, pipe extrusion after granulation, the extruder is divided into 6 ...
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Abstract
The invention discloses a halogen-free flame-retardant polypropylenepipe which comprises the following components in percentage by mass: 18-22% of polypropylene; 8-12% of maleic anhydride grafted polypropylene; 61-67% of a non-halogenflame retardant; and 3 to 9% of a ZnMgAl-LDHs compound. The invention also discloses a preparation method of the halogen-free flame-retardant polypropylene pipe. According to the invention, the ZnMgAl-LDHs compound is used as a filling material, the non-halogen flame retardant (M) is added as a flame retardant to be mixed with the maleic anhydride grafted polypropylene (PP-g-MA), and the mixture is used as a composite flame retardant, so that good flame retardance can be obtained, the use of the halogen flame retardant is reduced, and the environment is protected. In addition, polypropylene is subjected to maleic anhydridegrafting treatment, so that the associativity is improved, and combustion prevention is more facilitated. Moreover, the process raw materials are convenient to select and low in price, and the production cost is reduced.
Description
technical field [0001] The invention belongs to the field of PPR flame retardant, and in particular relates to a non-halogen flame retardant polypropylene pipe and a preparation method thereof. This kind of pipe is difficult to burn and easy to self-extinguish when encountering an open flame during actual use, and no toxic substances will be generated during the combustion process. Background technique [0002] Polypropylene is a colorless, odorless and non-toxic solid material. It is a thermoplasticsynthetic resin with excellent performance, so it shines in the fields of machinery, construction, agriculture, forestry and food packaging. And because of its excellent plasticity, polypropylene materials are widely used in construction, water pipes, and structural supports. However, polypropylene is very easy to burn in the event of high temperature or fire, and is a flammable material, which makes the fire more difficult to control, which is a potential safety hazard. [00...
Claims
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Application Information
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