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Thermoplastic halogen-free flame retarding elastomer composition for electric wire and cable covering materials

A covering material, wire and cable technology, applied in the direction of insulating cables, plastic/resin/wax insulators, cables, etc., can solve the problems of sticky surface of wire and cable, easy to stick dust, increase production cost, etc., and achieve excellent thermal deformation resistance , Improve flame retardant performance, excellent scratch resistance effect

Active Publication Date: 2010-09-15
NINGBO QINGHU ELASTOMER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the composition has excellent mechanical properties and good aging resistance, due to the low phosphorus content in the phosphoric ester flame retardant used, a large amount of phosphoric ester flame retardant must be added to meet the requirements of the UL standard for wires and cables. Flammability requirements, adding a large amount will increase the production cost on the one hand, on the other hand, because phosphate ester is a small molecular liquid flame retardant, it is easy to penetrate and migrate out of the combined system, resulting in sticky surface of the wire and cable and easy to stick dust. Seriously affect the use and appearance of the product, but also affect the waterproof, electrical insulation and other important properties of wire and cable

Method used

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  • Thermoplastic halogen-free flame retarding elastomer composition for electric wire and cable covering materials
  • Thermoplastic halogen-free flame retarding elastomer composition for electric wire and cable covering materials
  • Thermoplastic halogen-free flame retarding elastomer composition for electric wire and cable covering materials

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Experimental program
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Effect test

preparation example Construction

[0036] The preparation of the above-mentioned samples was carried out using the process described in Method 1. The details are as follows: Weigh polyphenylene ether resin, styrene-based elastomer, polyolefin resin, halogen-free flame retardant, flame retardant synergist, compatibilizer and other additives in sequence by mass parts and add them into the high-speed mixer together , after continuous stirring and mixing at room temperature for 10 minutes, extrude through a co-rotating twin-screw extruder in the range of 220 ° C to 250 ° C, and granulate after water cooling.

[0037] The formula, composition ratio and performance test result of table 1 embodiment 1-5 and comparative example 6-7

[0038]

[0039]

[0040] The performance test method of gained sample is as follows: (1) hardness: carry out according to ASTMD2240 standard, read the Shore durometer value after delaying 15 seconds; (2) Tensile property: carry out according to ASTM D412 standard, tensile speed 200mm...

Embodiment 1

[0042] The matrix hard resin adopts polyphenylene ether resin, the elastomer adopts hydrogenated polystyrene-b-butadiene-b-styrene (SEBS), the polyolefin adopts polypropylene, the compatibilizer adopts maleic anhydride grafted SEBS, flame retardant Melamine-coated nitrogen-phosphorus compound flame retardant was used as the agent, and tripentaerythritol was used as the flame-retardant synergist. See Example 1 in Table 1 for other components and proportions. The performance test results show that the obtained sample has good comprehensive mechanical properties, the flame retardancy meets the corresponding requirements of the UL test standard, and the surface of the sample has good scratch resistance.

Embodiment 2

[0044] On the basis of Example 1, only the type of polyolefin was changed, that is, polyethylene was used instead of polypropylene, and the rest of the components and ratios remained unchanged (see Table 1, Example 2). The performance test results show that compared with sample 1, due to the introduction of polyethylene, the strength and modulus of the sample are slightly reduced, but the toughness is improved, and the flame retardancy of the sample remains basically unchanged, that is, the sample can meet the requirements of various Item usage requirements.

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Abstract

The invention discloses a thermoplastic halogen-free flame retarding elastomer composition for electric wire and cable covering materials. The composition is prepared from the components in parts by weight: 100 parts of polyphenylene ether resin, 50-200 parts of styrene elastomer, 20-100 parts of polyolefin resin, 80-150 parts of halogen-free flame retardant, 0-30 parts of flame retardant synergist, 0-50 parts of compatilizer and 0.5-50 parts of other additive. The thermoplastic halogen-free flame retarding elastomer composition for electric wire and cable covering materials can satisfy the UL use standard of electric wires and cables, the produced products are healthy and environment-friendly, can effectively prevent the infiltration and the precipitation of ingredients of the flame retardant, and also have the advantages of low cost, favorable processing property, and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a thermoplastic halogen-free flame-retardant elastomer composition for wire and cable covering materials. Background technique [0002] As one of the important inventions of human industrial civilization, wires and cables have been widely used in the transmission of various types of electric energy and signals. Compared with other materials, polymer is the preferred base material for various wire and cable coverings due to its light specific gravity, easy molding, good comprehensive mechanical properties and excellent electrical insulation properties. [0003] According to the UL standard on the quality of wires and cables formulated by Underwriters Laboratories Inc., the outer covering of wires and cables must meet the following basic performance requirements: (1) It has excellent flame retardant performance, which is usually in the form of The vertical burning test (...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L71/12C08L23/06C08L23/12C08L23/16C08K13/06C08K9/10H01B3/42H01B3/44H01B7/295
Inventor 应建波徐立新
Owner NINGBO QINGHU ELASTOMER SCI & TECH
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