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All-weather persistent antistatic master batch capable of being subjected to thermoplastic processing and antistatic composite material

An antistatic masterbatch and composite material technology, applied in the field of polymer composite material preparation, can solve the problems of high price, shedding of conductive particles, single color, etc. Effect

Active Publication Date: 2011-05-18
浙江三和塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among the above three methods, although the former can produce polymer composite materials with long-lasting antistatic ability, the color of its products is relatively single (black), and conductive particles are prone to fall off during transportation and use to damage the circuit. Therefore, such products still cannot meet the antistatic performance requirements of coal mines and precision electronic components and other related fields.
The method of adding a small molecule antistatic agent to dissipate static electricity mainly relies on the hydrophilic group of the small molecule migrating to the surface of the product to absorb water in the air to form a conductive path, so its antistatic performance is extremely unstable, and when the ambient humidity is high When low, the material will lose antistatic ability
The third method is a recently popular method of eliminating static electricity accumulated on the surface of polymer materials, and its related products also have light-colored and durable antistatic capabilities, but this type of nanomaterials is often expensive, and the conductive material coated on the surface of the product The film is still easy to fall off during the transportation and use of the product, so that the product loses its antistatic ability
But the price of this product is relatively expensive (about 200,000 / ton), and the related technology has been kept secret
However, my country's research and development in this area is almost in a blank state, which forms a contradiction with the huge domestic market demand.

Method used

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  • All-weather persistent antistatic master batch capable of being subjected to thermoplastic processing and antistatic composite material
  • All-weather persistent antistatic master batch capable of being subjected to thermoplastic processing and antistatic composite material
  • All-weather persistent antistatic master batch capable of being subjected to thermoplastic processing and antistatic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]After stirring 50g polyether type thermoplastic polyurethane, 5g sodium perchlorate, 0.25g antioxidant 168, 1g polyethylene glycol 800 plasticizer and 0.1g oleic acid amide at normal temperature, use a double-roller mill to Knead at 160°C for 6-8 minutes to obtain an antistatic masterbatch sheet, and the obtained masterbatch sheet is cut into pellets by a sample cutter to obtain an antistatic masterbatch. After mixing 40g of ABS and 10g of the above-mentioned masterbatch uniformly at room temperature, the two-roll mill was used to knead again at 160°C for 6-8 minutes to prepare an ABS antistatic composite material sample. The resulting sample was pressurized at 180°C for 5 minutes by a pressure molding machine to obtain a standard sample of ABS antistatic composite material. The surface resistance of the standard sample at 30°C, 55% and 12% relative humidity was 4×10 9 and 2×10 10 ohm / sq.

Embodiment 2

[0040] Plasticize 50g polyether thermoplastic polyurethane, 1g sodium tetrafluoroborate, 1g sodium thiocyanate, 0.25g antioxidant 168, 0.25g antioxidant 1010, 0.25g EDTA-4Na, 1g dibutyl phthalate After mixing the agent and 0.1g of oleic acid amide at room temperature, use a HAAKE internal mixer at 160°C and 30rpm for 8 minutes to make block antistatic masterbatch. After mixing 30g of polypropylene and 20g of the above-mentioned block masterbatch at room temperature, the HAAKE internal mixer was used to banbury again under the same conditions for 6 minutes to obtain a sample block of PP antistatic composite material. The resulting sample block was pressurized at 180°C for 5 minutes by a pressure forming machine to obtain a standard sample of PP antistatic composite material. The surface resistance of the standard sample at 30°C, 55% and 12% relative humidity was 3×10 7 and 1×10 8 ohm / sq.

Embodiment 3

[0042] Stir 5000g polyetheramide copolymer, 125g sodium perchlorate, 125g sodium thiocyanate, 25g antioxidant 168, 100g polyethylene glycol 400 plasticizer, 25g EDTA-4Na and 10g oleic acid amide at room temperature Finally, use a banburying granulator to banbury at 160°C for 6-8 minutes and then cut into pellets to obtain antistatic masterbatch. After mixing 3500g of high-impact polystyrene and 1500g of the above-mentioned masterbatch uniformly at room temperature, a granular durable antistatic HIPS composite material was prepared at 180°C using a twin-screw granulator. After three-layer co-extrusion of the antistatic composite material (inner and outer layers) and HIPS (core layer) at 210°C, a blister sheet for packaging precision electronic components can be obtained. and the surface resistance at 12% relative humidity are 6×10 7 and 4×10 8 ohm / sq.

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Abstract

The invention belongs to the field of preparation of macromolecular composite materials and particularly relates to an all-weather persistent antistatic master batch capable of being subjected to thermoplastic processing and an antistatic composite material. The antistatic master batch is prepared by forming of a low-dissociation-energy compounding agent, a processing auxiliary agent and thermoplastic macromolecular resin containing polar groups through macromolecular thermoplastic processing equipment at the temperature of 25-300 DEG C; and the mass ratio of the compounding agent to the thermoplastic macromolecular resin is equal to (1:10)-(1:50). The invention also discloses the antistatic composite material which is obtained after the persistent antistatic master batch and a macromolecular base material are formed through the thermoplastic processing equipment. The antistatic composite material has the characteristics that: 1. the antistatic composite material has light color and dyeability; 2. The master batch of the antistatic composite material and the compounding agent are wider in selection range, low in cost and easy to obtain, and the production process is simple, safe and non-hazardous; and 3. the influence of the ambient environment on the antistatic performance of the antistatic composite material is less, and the antistatic performance is persistent.

Description

technical field [0001] The invention belongs to the field of preparation of polymer composite materials, and in particular relates to an all-weather durable antistatic masterbatch and antistatic composite material which can be thermoplastically processed. Background technique [0002] The surface resistance of most polymers is as high as 10 14 ~10 17 ohm / sq, a lightweight material with excellent insulating properties. Therefore, during the processing and transportation of polymer materials, the charge balance on the surface of the material will be broken due to friction, and the surface will generate a certain amount of static electricity due to charge gain and loss. However, high surface resistance often brings greater electrostatic hazards to polymer materials during use, often leading to dust collection on the surface of products, electrostatic breakdown and short circuit of circuit boards. It may even cause fire or explosion due to electrostatic discharge, which will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/04C08L29/04C08L29/14C08L33/26C08L31/04C08L75/04C08L77/00C08L67/00C08K13/02C08L23/06C08L23/12C08L27/06C08L25/06C08L55/02C08L67/02C08L33/12C08L53/02
Inventor 吴中心张宝成
Owner 浙江三和塑料有限公司
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