Low smoke halogen-free flame retardant reinforced nylon composite material and manufacture method

Abstract

The invention relates to a low smoke halogen-free flame retardant reinforced nylon composite material and a manufacture method. The composite material comprises the following components, namely, 30-70 parts of nylon, 8-25 parts of fire retardants, 0.5-20 parts of smoke suppression modifying agents A, 0.5-5 parts of smoke suppression modifying agents B, 2-12 parts of stem grafting type toughening modification agents, 10-30 parts of glass fibers, 0.2-1 part of antioxygen, 0.2-1 part of lubrication dispersing agent. Raw materials are put in a high mixing machine for mixing for 3-5 minutes and discharged, and a mixture is obtained. The machining temperature within a range of 230 DEG C to 250 DEG C of a twin-screw extruder is controlled. The number of revolutions is 180-600 turns per minute, and the mixture is placed in the twin-screw extruder, particles are extruded and a product is obtained. Compared with the prior art, low smoke halogen-free flame retardant nylon 66 meets the requirement for low fuming amount, inflaming retarding performance achieves a UL94V0 level, mechanical performance and electric performance are good, and the low smoke halogen-free flame retardant reinforced nylon composite material and the manufacture method can be applied to devices of a circuit breaker, a low voltage switch, an arc extinguishing cover and the like.

Description

technical field

[0001] The invention relates to the preparation of a nano-nylon composite material, in particular to a low-smoke, halogen-free, flame-retardant reinforced PA66 composite material and a preparation method thereof. Background technique

[0002] Polyamide has good mechanical strength and rigidity, good wear resistance and other advantages, and is widely used in automotive parts, mechanical parts, electronic and electrical fields, etc., becoming the first of the five engineering plastics, replacing traditional metal materials in many applications . However, unmodified PA66 is flammable, which limits its application in the electrical and electronic fields, so it needs to be modified for flame retardancy. The brominated flame retardant system used in traditional materials has a small amount of addition and high flame retardant efficiency, but the amount of smoke is large, and the corrosive gas produced causes secondary hazards. Many people use halogen-free flame ...

Examples

Embodiment 1-3

[0034] A method for preparing a low-smoke, halogen-free flame-retardant reinforced PA66 composite material, comprising the following steps:

[0035] (1) Prepare materials according to the components and contents in Table 1, wherein the nylon is nylon 66, the intrinsic viscosity is 2.6, the flame retardant is red phosphorus, and the flame retardant inhibitor A is Mg(OH) 2 , the flame retardant inhibitor B is nano-montmorillonite, which is a montmorillonite aluminosilicate with a purity greater than 98%, a particle size of 200-500 mesh, an interlayer distance of >1.9nm, a disperse phase of montmorillonite of 10-100nm, and a cation exchange The capacity is 60-200meq / 100g, the glass fiber is alkali-free glass fiber, the surface is soaked in γ-aminopropyltriethoxysilane, and the graft toughening modifier is ethylene-octene graft copolymer. The antioxidant is compounded by HD98 and 168 in a weight ratio of 1:1, and the lubricating and dispersing agent is silicone.

[0036] (2) Put ...

Embodiment 4

[0044] A method for preparing a low-smoke, halogen-free flame-retardant reinforced PA66 composite material, comprising the following steps:

[0045] (1) Prepare materials according to the following components and content (wt%):

[0046] Nylon 30;

[0047] Flame retardant 25;

[0048] Smoke suppression modifier A 20;

[0049] Smoke suppression modifier B 1

[0050] Fiberglass 10;

[0051] Graft type toughening modifier 12;

[0052] Antioxidant 1;

[0053] Lubricant Dispersant 1.

[0054] Among them, nylon is nylon 66, the intrinsic viscosity is 2.4Pa.S, the flame retardant is melamine phosphate, and the flame retardant inhibitor A is MoO 3 , the flame retardant inhibitor B is nano-montmorillonite, which is a montmorillonite aluminosilicate with a purity greater than 98%, a particle size of 200-500 mesh, an interlayer distance of >1.9nm, a disperse phase of montmorillonite of 10-100nm, and a cation exchange The capacity is 60-200meq / 100g, the glass fiber is alkali-free g...

Embodiment 5

[0057] A method for preparing a low-smoke, halogen-free flame-retardant reinforced PA66 composite material, comprising the following steps:

[0058] (1) Prepare materials according to the following components and content (wt%):

[0059] Nylon 51.5;

[0060] Flame retardant 25;

[0061] Smoke suppression modifier A 2;

[0062]Smoke suppression modifier B 0.5;

[0063] Glass fiber 18.6;

[0064] Graft toughening modifier 2;

[0065] Antioxidant 0.2;

[0066] Lubricant dispersant 0.2.

[0067] Among them, nylon is nylon 66, the intrinsic viscosity is 3.2Pa.S, the flame retardant is cyanurate, the flame retardant inhibitor A is MOM, and the flame retardant inhibitor B is nano-montmorillonite with a purity greater than 98% montmorillonite silicon Aluminate, particle size 200-500 mesh, interlayer spacing > 1.9nm, montmorillonite dispersed phase size 10-100nm, cation exchange capacity 60-200meq / 100g, glass fiber is alkali-free glass fiber, surface treated with γ-ammonia Propy...

technical field

[0001] The invention relates to the preparation of a nano-nylon composite material, in particular to a low-smoke, halogen-free, flame-retardant reinforced PA66 composite material and a preparation method thereof. Background technique

[0002] Polyamide has good mechanical strength and rigidity, good wear resistance and other advantages, and is widely used in automotive parts, mechanical parts, electronic and electrical fields, etc., becoming the first of the five engineering plastics, replacing traditional metal materials in many applications . However, unmodified PA66 is flammable, which limits its application in the electrical and electronic fields, so it needs to be modified for flame retardancy. The brominated flame retardant system used in traditional materials has a small amount of addition and high flame retardant efficiency, but the amount of smoke is large, and the corrosive gas produced causes secondary hazards. Many people use halogen-free flame ...

Examples

Embodiment 1-3

[0034] A method for preparing a low-smoke, halogen-free flame-retardant reinforced PA66 composite material, comprising the following steps:

[0035] (1) Prepare materials according to the components and contents in Table 1, wherein the nylon is nylon 66, the intrinsic viscosity is 2.6, the flame retardant is red phosphorus, and the flame retardant inhibitor A is Mg(OH) 2 , the flame retardant inhibitor B is nano-montmorillonite, which is a montmorillonite aluminosilicate with a purity greater than 98%, a particle size of 200-500 mesh, an interlayer distance of >1.9nm, a disperse phase of montmorillonite of 10-100nm, and a cation exchange The capacity is 60-200meq / 100g, the glass fiber is alkali-free glass fiber, the surface is soaked in γ-aminopropyltriethoxysilane, and the graft toughening modifier is ethylene-octene graft copolymer. The antioxidant is compounded by HD98 and 168 in a weight ratio of 1:1, and the lubricating and dispersing agent is silicone.

[0036] (2) Put ...

Embodiment 4

[0044] A method for preparing a low-smoke, halogen-free flame-retardant reinforced PA66 composite material, comprising the following steps:

[0045] (1) Prepare materials according to the following components and content (wt%):

[0046] Nylon 30;

[0047] Flame retardant 25;

[0048] Smoke suppression modifier A 20;

[0049] Smoke suppression modifier B 1

[0050] Fiberglass 10;

[0051] Graft type toughening modifier 12;

[0052] Antioxidant 1;

[0053] Lubricant Dispersant 1.

[0054] Among them, nylon is nylon 66, the intrinsic viscosity is 2.4Pa.S, the flame retardant is melamine phosphate, and the flame retardant inhibitor A is MoO 3 , the flame retardant inhibitor B is nano-montmorillonite, which is a montmorillonite aluminosilicate with a purity greater than 98%, a particle size of 200-500 mesh, an interlayer distance of >1.9nm, a disperse phase of montmorillonite of 10-100nm, and a cation exchange The capacity is 60-200meq / 100g, the glass fiber is alkali-free g...

Embodiment 5

[0057] A method for preparing a low-smoke, halogen-free flame-retardant reinforced PA66 composite material, comprising the following steps:

[0058] (1) Prepare materials according to the following components and content (wt%):

[0059] Nylon 51.5;

[0060] Flame retardant 25;

[0061] Smoke suppression modifier A 2;

[0062]Smoke suppression modifier B 0.5;

[0063] Glass fiber 18.6;

[0064] Graft toughening modifier 2;

[0065] Antioxidant 0.2;

[0066] Lubricant dispersant 0.2.

[0067] Among them, nylon is nylon 66, the intrinsic viscosity is 3.2Pa.S, the flame retardant is cyanurate, the flame retardant inhibitor A is MOM, and the flame retardant inhibitor B is nano-montmorillonite with a purity greater than 98% montmorillonite silicon Aluminate, particle size 200-500 mesh, interlayer spacing > 1.9nm, montmorillonite dispersed phase size 10-100nm, cation exchange capacity 60-200meq / 100g, glass fiber is alkali-free glass fiber, surface treated with γ-ammonia Propy...