Electric-conducting flame-retarding thermoplastic powder, preparation method and applications thereof

A thermoplastic and powder technology, applied in powder coatings, conductive coatings, coatings, etc., can solve problems such as insufficient ring rigidity, heavy weight, short service life, etc., achieve excellent overall performance, reduce processing energy consumption, and ensure leveling sexual effect

Inactive Publication Date: 2013-08-21
SHANXI ANDELU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure metal pipes have the advantages of electrical conductivity and high strength, but they are heavy, difficult to install, and have short service life due to corrosion and rust; conductive plastic pipes have many advantages such as electrical conductivity, long service life, and convenient installation, but their strength is not as good as that of metal pipes. The difference between the pipes is too far; although the steel mesh skeleton reinforced polyethylene pipe partially combines the high strength of steel wire and the corrosion resistance of plastic, it will have insufficient strength under high positive pressure and insufficient ring stiffness under high negative pressure. Defects lead to negative pressure flattening; considering the above factors, the steel-plastic pipe is an ideal pipe. However, considering that the pipes used in coal mines need to meet the requirements of MT 558.1 for anti-static, flame-retardant and other characteristics, a new powder coating is proposed. requirements
[0003] There have been many reports on antistatic and flame retardant plastics for extruded pipes, such as CN14118907A and CN1114607A, which use antistatic agents to modify polyethylene, but antistatic agents rely on migration and surface adsorption of water films to achieve the purpose of conduction Therefore, it is affected by the conditions of use and the service life; the antistatic polyethylene material involved in the publication number CN1616531A uses two conductive carbon blacks with different specific surface areas to modify polyethylene, which expands its scope of use, but all Applications covered are for extruded tubing and not for powder coating
The antistatic thermoplastic polyethylene powder involved in the patent No. ZL 200810219188.3 uses special conductive carbon black, which solves the problem of antistatic, but the flame retardancy is mainly realized by the heat conduction of metal pipes, according to MT 558.1-2005 The test has the functions and functions of conductivity and flame retardancy, but from the perspective of reliable use, if there is a large fire underground, it is obviously not feasible to rely solely on heat conduction to flame retard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The composition formula calculated by percentage includes: conductive masterbatch 23%, graft bonding masterbatch 10%, flame retardant masterbatch 22%, mixture and its additives 45% (among them, linear low density polyethylene 30%, Polyvinyl acetate 12%, leveling agent 3%).

[0041] In the formula of the above composition, calculated by weight percentage, the formula of the conductive masterbatch is: linear low density polyethylene 73%, conductive carbon black 25%, titanate coupling agent 2%; the formula of the grafted bonding masterbatch is: 93.5% linear low-density polyethylene, 4% polyvinyl acetate, 1.5% maleic anhydride, 0.05% peroxide initiator (DCP) and 1% styrene; the formula of the halogen-free flame retardant masterbatch is: high melting index linear Low-density polyethylene 65%, coated red phosphorus 35%.

[0042] The preparation method of each masterbatch in the above composition formulation is the same as the preparation method of the above specific embodime...

Embodiment 2

[0044] The composition formula calculated by percentage includes: conductive masterbatch 22%, graft bonding masterbatch 15%, flame retardant masterbatch 25%, mixture and its additives 38% (among them, linear low density polyethylene 17%, Polyvinyl acetate 18%, leveling agent 3%).

[0045] In the formula of the above composition, calculated by weight percentage, the formula of the conductive masterbatch is: linear low density polyethylene 73%, conductive carbon black 25%, titanate coupling agent 2%; the formula of the grafted bonding masterbatch is: Linear low density polyethylene 91%, polyvinyl acetate 6%, maleic anhydride 1.5%, styrene (St) 1.5%, peroxide initiator (DCP) 0.05%; the formula of halogen-free flame retardant masterbatch is: high Melt index linear low density polyethylene 65%, coated red phosphorus 35%. .

[0046] The preparation method of each masterbatch in the above composition formulation is the same as the preparation method of the above specific embodiment...

Embodiment 3

[0050] The composition formula calculated by percentage includes: 20% of conductive masterbatch, 15% of grafted adhesive masterbatch, 30% of flame retardant masterbatch, 35% of mixture and its compounding additives (among them, 17% of linear low density polyethylene, Polyvinyl acetate 15%, leveling agent 3%).

[0051] In the formula of the above composition, calculated by weight percentage, the formula of the conductive masterbatch is: 83% of linear low density polyethylene, 15% of conductive carbon black, 2% of titanate coupling agent; the formula of the grafted bonding masterbatch is: 93.5% linear low-density polyethylene, 4% polyvinyl acetate, 1.5% maleic anhydride, 0.05% peroxide initiator (DCP) and 1% styrene; the formula of the halogen-free flame retardant masterbatch is: high melting index linear Low-density polyethylene 70%, coated red phosphorus 30%.

[0052] The preparation method of each masterbatch in the above composition formulation is the same as the preparatio...

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Abstract

The invention relates to electric-conducting flame-retarding thermoplastic powder, a preparation method and applications of the electric-conducting flame-retarding thermoplastic powder. The electric-conducting flame-retarding thermoplastic powder consists of the following components in percentage by weight: 20-25% of an electric-conducting master batch, 10-15% of a grafted adhesive master batch, 20-30% of a halogen-free flame-retarding master batch and 30-50% of a polyolefin mixture and accessory ingredients. According to the invention, the electric-conducting flame-retarding thermoplastic powder is formed through granulating and grinding the electric-conducting master batch, the flame-retarding master batch, the adhesive master batch and other compositions as well as accessory ingredients of the other compositions through a dual-screw extruder, has a favorable leveling property and a good adhesive force to steel tubes besides the anti-static and flame-retarding characteristics required by the use of an underground coal mine. The electric-conducting flame-retarding thermoplastic powder, the preparation method and applications of the electric-conducting flame-retarding thermoplastic powder, provided by the invention, can be used for coating inner surfaces and outer surfaces of steel tubes, combine the advantages of no rustiness of plastic and high intensity of metal tubular products, and prolong the service life of steel tubes on the basis of meeting the anti-static and flame-retarding characteristics and the like of pipelines used in the coal mine.

Description

technical field [0001] The invention relates to a conductive and flame-resistant thermoplastic powder, a preparation method and an application thereof, belonging to the field of powder coatings. Background technique [0002] Powder coating has the advantages of environmental protection, no solvent release, high utilization rate, superior physical and mechanical properties and chemical medium resistance, and convenient construction. Therefore, it has been developed rapidly in drinking water pipelines and chemical pipelines. At present, the pipelines used in coal mines generally use metal pipes, conductive plastic extruded pipes and steel mesh skeleton reinforced polyethylene pipes. Pure metal pipes have the advantages of electrical conductivity and high strength, but they are heavy, difficult to install, and have short service life due to corrosion and rust; conductive plastic pipes have many advantages such as electrical conductivity, long service life, and convenient instal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L51/00C08K9/10C08K3/02C08K3/04C08F291/06C08F291/00C08J3/22C09D123/06C09D5/03C09D5/24C09D5/18C09D7/12
Inventor 陈占春李峰宋桂珍
Owner SHANXI ANDELU TECH
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