Preparation method for low-smoke halogen-free flame retardant material

A technology of flame retardant and flame retardant, which is applied in the field of preparation of low-smoke, halogen-free fuel, can solve the problems of unsatisfactory flame retardant effect, achieve the effects of reducing unqualified, complete cross-linking reaction, and reducing pollution

Inactive Publication Date: 2013-05-08
HANGZHOU RONGRONG OPTICAL CABLE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame retardant effect of the flame retardants on the existing market is often not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of low-smoke and halogen-free flame-retardant fuel adopts the following steps:

[0026] (1) Add aluminum hydroxide to a high-speed mixer for dehydration, heat up to 100°C while stirring, then add silane coupling agent, heat up to 110°C while stirring, the amount of aluminum hydroxide is 35 parts by weight, silane coupling The consumption of agent is 4 parts by weight;

[0027] (2) Add the flame retardant, EVA, flow modifier and compatibilizer that are evenly stirred into the pressurized kneader, and heat up to 145°C while pressurizing and kneading. The amount of EVA is 65 parts by weight, and the flow modifier The consumption of neutralizing agent is 2 weight parts, and the consumption of compatibilizer is 5 weight parts;

[0028] (3) The kneaded material is fed into the twin-screw extruder through the cone double feeder;

[0029] (4) The kneaded raw materials are extruded in a twin-screw extruder. The temperature in the feeding area of ​​the tw...

Embodiment 2

[0034] The preparation method of low-smoke and halogen-free flame-retardant fuel adopts the following steps:

[0035] (1) Add aluminum hydroxide to a high-speed mixer for dehydration, heat up to 90°C while stirring, then add silane coupling agent, heat up to 105°C while stirring, the amount of aluminum hydroxide is 30 parts by weight, silane coupling The consumption of agent is 3 parts by weight;

[0036] (2) Add the flame retardant, EVA, flow modifier and compatibilizer that are evenly stirred into the pressurized kneader, and heat up to 135°C while pressurizing and kneading. The amount of EVA is 60 parts by weight, and the flow modifier The consumption of neutralizing agent is 2 weight parts, and the consumption of compatibilizer is 5 weight parts;

[0037] (3) The kneaded material is fed into the twin-screw extruder through the cone double feeder;

[0038] (4) The kneaded raw materials are extruded in the twin-screw extruder. The temperature of the feeding zone of the twi...

Embodiment 3

[0043] The preparation method of low-smoke and halogen-free flame-retardant fuel adopts the following steps:

[0044] (1) Add aluminum hydroxide to a high-speed mixer for dehydration, heat up to 95°C while stirring, then add silane coupling agent, heat up to 100°C while stirring, the amount of aluminum hydroxide is 40 parts by weight, silane coupling The consumption of agent is 5 parts by weight;

[0045] (2) Add the flame retardant, EVA, flow modifier and compatibilizer that are evenly stirred into the pressurized kneader, and heat up to 155°C while pressurizing and kneading. The amount of EVA is 70 parts by weight, and the flow modifier The consumption of agent is 3 parts by weight, and the consumption of compatibilizer is 6 parts by weight;

[0046] (3) The kneaded material is fed into the twin-screw extruder through the cone double feeder;

[0047](4) The kneaded raw materials are extruded in a twin-screw extruder. The temperature in the feeding area of ​​the twin-screw ...

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Abstract

The invention belongs to the technical field of the synthesis of composite materials and in particular relates to a preparation method for a low-smoke halogen-free flame retardant material. The preparation method for the low-smoke halogen-free flame retardant material comprises the following steps of: dehydrating aluminum hydroxide and enabling the dehydrated aluminum hydroxide to be compatible with a silane coupling agent to obtain a flame retardant; heating up and kneading the flame retardant, EVA (Ethylene-Vinyl Acetate) and other auxiliaries until the materials are heated up to 135 DEG C to 145 DEG C; extruding the kneaded material through a double-screw extruder and a single-screw extruder in sequence; and pelletizing by using an air-cooling mould surface to prepare the low-smoke halogen-free flame retardant material. According to the preparation method disclosed by the invention, the aluminum hydroxide particles can be enabled to be fully compatible with the EVA by adjusting the raw material ratio of the flame retardant material and controlling the temperature in the kneading process and the extruding process, so that the adding amount of the aluminum hydroxide is reduced and the flame retardant effect is ensured. Meanwhile, the pollution of the aluminum hydroxide dust is greatly reduced, the cross-linking reaction of the flame retardant and auxiliaries is more complete, and the strain rate, the elongation at break and the ageing resistance of the halogen-free flame retardant material are further improved.

Description

technical field [0001] The invention belongs to the technical field of composite material synthesis, and in particular relates to a preparation method of a low-smoke, halogen-free flame retardant fuel. Background technique [0002] Among halogen-free flame retardants, aluminum hydroxide Al(OH) 3 The representative inorganic hydroxide is very important and the most used flame retardant. Aluminum hydroxide itself has three functions of flame retardancy, smoke elimination and filling. Because it is non-volatile, non-toxic, and can produce synergistic flame retardancy with various substances, it is known as a pollution-free inorganic flame retardant. However, since aluminum hydroxide is a strong polar inorganic filler, the primary particles are easy to agglomerate and have poor compatibility with organic polymers. Therefore, when a large amount of polymer materials such as resins are filled, the viscosity of the material will increase, making molding and processing difficult. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08K9/06C08K3/22B29C47/92B29C48/92
CPCB29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895
Inventor 屠洪敏
Owner HANGZHOU RONGRONG OPTICAL CABLE MATERIALS CO LTD
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