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Heat-resisting thermoplastic halogen-free low-smoke flame retardant polyolefin plastic for wire and cable

A wire and cable, low-smoke flame-retardant technology, applied in the direction of insulated cables, plastic/resin/wax insulators, cables, etc., can solve problems such as cracking, unavoidable thermal stress cracking, and biased performance, and achieve reasonable selection. Effects of avoiding thermal stress cracking, improving flame retardancy and oxygen index

Active Publication Date: 2014-01-22
CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding these two types of thermoplastic elastomers to halogen-free flame-retardant polyolefins can reflect ideal heat aging resistance and heat deformation resistance. However, it is found that the halogen-free flame-retardant When the method in Appendix A of the standard GB / T15065 is used for the determination of thermal stress cracking, there will be obvious cracking phenomenon (there is a heat cracking test in the performance requirements of wire and cable), so it shows that if only focus on adding to the formula to improve the heat aging resistance If the thermoplastic elastomer with heat deformation resistance is added to the above-mentioned propylene-based elastomer or styrene thermoplastic elastomer component, and the other properties are biased, it is difficult or even impossible to avoid the problem of thermal stress cracking

Method used

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  • Heat-resisting thermoplastic halogen-free low-smoke flame retardant polyolefin plastic for wire and cable
  • Heat-resisting thermoplastic halogen-free low-smoke flame retardant polyolefin plastic for wire and cable
  • Heat-resisting thermoplastic halogen-free low-smoke flame retardant polyolefin plastic for wire and cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]

[0025] The NOTIO described in this example is produced by Mitsui Chemicals, Japan, and the crystalline part of the elastomer is dispersed at the nanometer level to control the structure of the non-crystalline part.

[0026] When preparing, first add the above-mentioned components into a high-speed kneader and mix them evenly, then transfer them to a twin-screw extruder for melt extrusion, cool and pelletize, and obtain heat-resistant thermoplastic halogen-free low-smoke flame-retardant polyolefin plastics for wire and cable . Or put it into the internal mixer for internal mixing, and then transfer to the twin-screw extruder for melt extrusion. The plastic components are mixed, plasticized and granulated to make heat-resistant thermoplastic halogen-free flame-retardant polyolefin plastic particles.

[0027] The example that present embodiment 1 compares with comparative example 1 and comparative example 2 is shown in table 1:

Embodiment 2

[0038]Embodiment 2,3,4 are shown in Table 3:

[0039] table 3

[0040]

[0041]

[0042] The EVA described in embodiment 2 in above-mentioned table 3 is ethylene vinyl acetate copolymer (EVA) that the mass percent composition of vinyl acetate is 16% for VA; 20 parts of linear low density polyethylene (LLDPE) grafted with acid anhydride and 5 parts of ethylene vinyl acetate copolymer grafted with maleic anhydride; the flame retardant is aluminum hydroxide; the flame retardant synergist is molybdenum oxide; antioxidant It is a combination of 10760.6 parts of antioxidant and 0.6 part of antioxidant DLTP; the lubricant is a combination of 1 part of polyethylene wax and 1 part of silicone masterbatch.

[0043] The EVA described in embodiment 3 in above-mentioned table 3 is ethylene vinyl acetate copolymer (EVA) that the mass percentage composition of vinyl acetate is 40% for VA; Anhydride-grafted linear low-density polyethylene; the flame retardant is a combination of 100 p...

Embodiment 5

[0049] Only change the ethylene-vinyl acetate copolymer to VA, that is, the mass percentage of vinyl acetate is 25% ethylene-vinyl acetate copolymer and change the parts by weight to 35 parts; The parts by weight are changed to 18 parts; the parts by weight of the propylene-based elastomer is catalyzed by a metallocene catalyst and the crystalline and non-crystalline structures are nanoscale propylene-based thermoplastic elastomers (NOTTO) are changed to 40 parts by weight; the polymer The compatibilizer is changed to polyolefin elastomer and the parts by weight are changed to 20 parts; the flame retardant is changed to 130 parts of magnesium-aluminum composite flame retardant, and the magnesium-aluminum composite flame retardant is magnesium hydroxide and aluminum hydroxide according to A mixture mixed in any proportion; change the flame retardant synergist to 1 part of zinc phosphate, 1 part of zinc borate, and 0.5 part of boron phosphate; change the antioxidant to 10760.3 pa...

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Abstract

A heat-resisting thermoplastic halogen-free low-smoke flame retardant polyolefin plastic for wire and cable belongs to the technical field of insulation or sheath material for wire and cable in industrial high molecular material. The polyolefin plastic is composed of the following raw materials by weight: 20-60 parts of an ethylene vinyl acetate copolymer, 5-20 parts of polyethylene, 20-50 parts of a propylene based elastomer, 10-30 parts of a polymer compatibilizer, 120-160 parts of a flame retardant, 2-6 parts of a flame retardant synergistic agent, 0.8-2 parts of an antioxidant and 0.5-3 parts of a lubricant. The invention has the following advantages: the polyolefin plastic has excellent heat deformation resistance and heat aging resistance, and can meet the property requirements of wire and cable insulation and sheath material with usage temperature at 90-105 DEG C; and the polyolefin plastic gains better compatibility and crack resistance, has good flexibility, avoids the problem of thermal stress cracking, and can improve the flame retardant performance and oxygen index of flame retardant materials.

Description

technical field [0001] The invention belongs to the technical field of insulating or sheathing materials for wires and cables among industrial polymer materials, and specifically relates to a heat-resistant thermoplastic halogen-free low-smoke flame-retardant polyolefin plastic for wires and cables. Background technique [0002] As known in the industry, polyvinyl chloride is the most widely used plastic material on wires and cables. This plastic is a halogen-containing material. When burned, it will release toxic and harmful gases and generate a large amount of smoke. It is vulnerable to damage to the environment and has secondary hazards. For example, poisonous and harmful gases at the scene of a fire can easily cause people to suffocate and die. Since the halogen-free low-smoke flame-retardant polyolefin does not contain halogen, it can make up for the above-mentioned shortcomings of polyvinyl chloride, so it has gradually attracted the attention and favor of the industry...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L101/02C08K13/02C08K3/22C08K3/32C08K3/38H01B3/44H01B7/295
CPCC08L23/0853C08L23/10C08L51/06C08L2201/02C08L2201/08C08L2201/22C08L2203/202C08L2205/035C08L2207/04H01B3/441H01B7/295C08L23/0815C08K13/02C08K2003/2227C08K2003/2293C08L2205/025C08K2003/2255C08K2003/2224C08K3/38C08L23/00C08K2003/321
Inventor 张尔梅包金芳朱俊计文龙张健王俊刚
Owner CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF
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