Halogen-free flame retardant polyamide hot-melt adhesive and preparation method thereof

[0026] The preparation method of the above-mentioned halogen-free flame-retardant polyamide hot-melt adhesive comprises the following steps:

[0027] Step 1, raw material weighing: weigh according to the required raw material parts by weight;

[0028] Step 2, compounding of halogen-free flame retardants: Add the required flame retardants into the high-speed mixer and stir evenly;

[0029] Step 3, kneader mixing: add dimer acid type polyamide hot melt adhesive, halogen-free flame retardant, and antioxidant into the kneader, and knead evenly;

[0030] Step 4, twin-screw extrusion granulation: performing secondary mixing on the blend obtained in step 3 through a twin-screw extruder;

[0031] Step 5, cooling and pelletizing: extruding from a twin-screw extruder and pelletizing by a pelletizer to obtain halogen-free flame-retardant polyamide hot-melt adhesive pellets;

[0032] Step 6, drying and packaging: drying the halogen-free flame-retardant polyamide hot-melt adhesive obtained

[0035] Weigh 100 parts of dimer acid type polyamide hot melt adhesive, 15 parts of halogen-free flame retardant and 1 part of antioxidant in parts by weight.

[0036] The halogen-free flame retardant consists of 10 parts of melamine polyphosphate (MPP) and 5 parts of ammonium polyphosphate (APP).

[0037] The antioxidant is composed of 0.5 part of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 0.5 part of distearyl thiodipropionate (DSTDP). .

[0038] The preparation method is as follows:

[0039] Weigh the required raw materials according to the above amount, add the required melamine polyphosphate (MPP), ammonium polyphosphate (APP), etc. into the high-speed mixer, stir for 3 minutes, pour into the kneader, add the weighed dimer Acid-type polyamide hot-melt adhesive and antioxidant, mixed for 10 minutes, the hot-melt adhesive kneaded by the kneader is transferred to the twin-screw extruder extruder for secondary mixing, cooled and diced

[0044] Weigh 100 parts of dimer acid type polyamide hot melt adhesive, 65 parts of halogen-free flame retardant and 0.3 part of antioxidant in parts by weight.

[0045] The halogen-free flame retardant is composed of 30 parts of melamine cyanurate (MCA), 15 parts of melamine polyphosphate (MPP), 15 parts of ammonium polyphosphate (APP), 4 parts of pentaerythritol, and 1 part of zinc oxide.

[0046] The antioxidant is 0.3 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester.

[0047] The preparation method is as follows:

[0048] Weigh the required raw materials according to the above amount, add the required melamine cyanurate (MCA), melamine polyphosphate (MPP), ammonium polyphosphate (APP), pentaerythritol, zinc oxide, etc. into the high-speed mixer, stir for 3 minutes and pour Put into the kneader, add the weighed polyamide hot melt adhesive and antioxidant, knead for 10 minutes, the hot melt adhesive after the kneader kneading is transferre