Ultra-soft B1-level low-smoke halogen-free flame-retardant sheath material and preparation method thereof

A flame-retardant sheath, ultra-soft technology, applied in the direction of plastic/resin/wax insulators, organic insulators, electrical components, etc., can solve the problems of not being able to meet the softness and B1-level flame retardancy at the same time, and achieve the effect of improving soft performance

Active Publication Date: 2021-05-07
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a supersoft B1-grade low-smoke halogen-free flame-retardant sheathing material in order to overcome the defect that the softness and B1-grade flame retardancy described in the above-mentioned prior art cannot be satisfied at the same time.

Method used

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  • Ultra-soft B1-level low-smoke halogen-free flame-retardant sheath material and preparation method thereof
  • Ultra-soft B1-level low-smoke halogen-free flame-retardant sheath material and preparation method thereof
  • Ultra-soft B1-level low-smoke halogen-free flame-retardant sheath material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0060] The preparation of the SEBS grafted maleic anhydride adopts twin-screws with a length-to-diameter ratio of 48:1, side feeds the initiator and maleic anhydride in proportion, and the processing temperature of the twin-screw extruder is 175-200°C . Select commercially available grades of SEBS with a molecular weight of 300,000 and different styrene contents for melt grafting;

[0061] Ethylene-octene copolymer: Dow Chemical’s POE 58750 is used, density: 0.870, melt index: 1g / 10min at 190°C*2.16Kg;

[0062] Polyphenylene ether: Bluestar Chemical LXR-045 brand used;

[0063] Magnesium hydroxide: Magnesium hydroxide adopts the magnesium hydroxide brand F5 of Shandong Aifer Company, and the average particle size is 1.5 μm;

[0064] Magnesium hydroxide coating; in a high mixer, heat magnesium hydroxide to 60°C, add 3-aminopropyltriethoxysilane in proportion; mix at high speed for 30 minutes;

[0065] Aluminum hypophosphite: Lidao new material brand is M-116H, coated with me...

Embodiment 1～5

[0080] The formula (part) of table 1 embodiment 1~5

[0081] Example 1 Example 2 Example 3 Example 4 Example 5 Ethylene-methyl acrylate copolymer B 25 25 25 25 25 Ethylene-octene copolymer 25 25 25 25 25 Hydrogenated Styrene-Butadiene Block Copolymer B1 30 — — — — Hydrogenated Styrene-Butadiene Block Copolymer B2 — 30 — — — Hydrogenated Styrene-Butadiene Block Copolymer B3 — — 30 — — Hydrogenated Styrene-Butadiene Block Copolymer B4 — — — 30 — Hydrogenated Styrene-Butadiene Block Copolymer B5 — — — — 30 SEBS grafted maleic anhydride B 4 4 4 4 4 Rubber filling oil A 8 8 8 8 8 Polyphenylene ether 8 8 8 8 8 magnesium hydroxide 160 160 160 160 160 Aluminum hypophosphite 25 25 25 25 25 smoke suppressant 4 4 4 4 4 antioxidant 2 2 2 2 2 lubricant 2 2 2 2 2

Embodiment 6～12

[0083] The formula (part) of table 2 embodiment 6~12

[0084]

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Abstract

The invention provides an ultra-soft B1-level low-smoke halogen-free flame-retardant sheath material and a preparation method thereof. The sheath material comprises the following components in parts by weight: 15-35 parts of an ethylene-methyl acrylate copolymer; 15-35 parts of an ethylene-octylene copolymer; 25-40 parts of a hydrogenated styrene-butadiene block copolymer; 5-15 parts of rubber filling oil; 3-8 parts of SEBS grafted maleic anhydride; 3-8 parts of polyphenyl ether; 120-170 parts of magnesium hydroxide; 10-35 parts of aluminum hypophosphite; 3-8 parts of a smoke suppressant; 1-3 parts of an antioxidant; 1-3 parts of a lubricant; the content of styrene in the hydrogenated styrene-butadiene block copolymer is 20-40 wt%; the aluminum hypophosphite is subjected to coating treatment. The maximum shore A hardness value of the sheath material is 79A, B1-level flame retardance is met, the light transmittance of a finished product is larger than or equal to 60%, and the sheath material has the tensile strength and the elongation at break meeting the standard. The sheath material can be applied to an environment requiring an ultra-soft cable sheath.

Description

technical field [0001] The invention relates to the field of cable sheathing materials, in particular to an ultra-soft B1 grade low-smoke, halogen-free, flame-retardant sheathing material and a preparation method thereof. Background technique [0002] GB / T 31247B1 flame-retardant cables are mainly used in densely populated places such as airports, stations, rail transit, and large buildings. Compared with GB / T 19666 and GB / T 17651, GB / T 31247B1 level flame retardant has higher requirements on the heat release and smoke release performance of the sheath material, which is difficult for traditional sheath materials to meet. Halogen flame-retardant cable materials are filled with a large amount of metal hydroxides, which makes the materials generally hard, and the Shore A hardness is very high. If it is made of halogen flame-retardant cable materials, firstly, it will cause environmental problems, and secondly, it will also cause problems. Does not meet GB / T 31247B1 standard. ...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L23/08C08L51/00C08L71/12C08K13/06C08K9/06C08K3/22C08K9/10C08K3/32C08K3/34C08K3/28C08K3/38H01B3/30H01B3/44
CPCC08L53/025C08L23/0815H01B3/441H01B3/307C08L2201/02C08L2201/22C08L2203/202C08K2003/2224C08K2003/387C08K2201/011C08L2205/02C08L2205/035C08L23/0869C08L51/006C08L71/12C08K13/06C08K9/06C08K3/22C08K9/10C08K3/32C08K3/346C08K3/28C08K3/38
Inventor 梁家荣黄险波叶南飚刘乐文付晓李计彪
Owner KINGFA SCI & TECH CO LTD
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