Method for preparing polyolefin/nano calcium carbonate mixture

A nano-calcium carbonate and polyolefin technology is applied in the field of polymer material preparation, which can solve the problems of dust pollution, large equipment investment and high energy consumption, and achieve the effect of avoiding the melting and granulating process and avoiding energy consumption.

Inactive Publication Date: 2011-01-12
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are obviously disadvantages of high energy consumption, dust pollution, large investment in equipment, complicated process, and easy reunion of nanoparticles due to secondary melting of resin.

Method used

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  • Method for preparing polyolefin/nano calcium carbonate mixture
  • Method for preparing polyolefin/nano calcium carbonate mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 62 kg of nano-calcium carbonate, 1.5 kg of methacrylic acid, 1.24 kg of aluminate coupling agent, 0.0092 kg of composite antioxidant B225, and 0.28 kg of reactive monomer maleic anhydride to a 200-liter high-speed mixer. Density polyethylene (grafting ratio 1.2 mmol / 100 g) and 46 kg polypropylene (melt index 21 g / 10 min). The speed of high-speed mixing is 3000 rpm, the heating power is 2KW, and the temperature of the system reaches 110°C after 10 minutes. All additives are evenly coated on the polypropylene particles, and the heating and mixing are stopped. The mixture was spun into fibers with a screw spinning machine, and the properties of the fibers are shown in Table 1.

Embodiment 2

[0023] In 200 liters of high-speed mixers, add 45 kilograms of nano-calcium carbonates, 2.2 kilograms of methacrylic acid, 0.9 kilograms of aluminate coupling agents, 0.013 kilograms of composite antioxidant B225, 0.3 kilograms of maleic anhydride grafted linear low-density polyethylene ( Grafting rate 1.2 mmol / 100 g) and 65 kg polypropylene (melt index 21 g / 10 min). The speed of high-speed mixing is 3000 rpm, the heating power is 2KW, and the temperature of the system reaches 110°C after 25 minutes. All additives are evenly coated on the polypropylene particles, and the heating and mixing are stopped. The mixture was spun into fibers with a screw spinning machine, and the properties of the fibers are shown in Table 1.

Embodiment 3

[0025] In 200 liters of high-speed mixers, add 30 kilograms of nano-calcium carbonates, 3.2 kilograms of methacrylic acid, 0.6 kilograms of aluminate coupling agents, 0.017 kilograms of composite antioxidant B225, 0.3 kilograms of maleic anhydride grafted linear low-density polyethylene ( Grafting rate 1.2 mmol / 100 g) and 85 kg polypropylene (melt index 21 g / 10 min). The speed of high-speed mixing is 3000 rpm, the heating power is 2KW, and the temperature of the system reaches 110°C after 10 minutes. All additives are evenly coated on the polypropylene particles, and the heating and mixing are stopped. The mixture was spun into fibers with a screw spinning machine, and the properties of the fibers are shown in Table 1.

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Abstract

The invention relates to a preparation method for a mixed material of polyolefine / nanometer calcium carbonate, which includes the steps as follows: when the nanometer calcium carbonate, polyolefin resin and other additives are mixed in a high speed mixer at high speed simultaneously, a method of mixed heating or added heating is utilized to lead the temperature of a mixed system to raised to the temperature between 100 to 120 DEG C to soften the polyolefine and to lead the nanometer calcium carbonate as well as the other additives to be uniformly stuck on the polyolefin resin; while no serious conglutination exists between the particles of the polyolefin resin. The mixed material of polyolefine / nanometer calcium carbonate prepared by the invention can be broadly applied to plastics which are enhanced in manufacturing, toughened and modified, films and fibers.

Description

technical field [0001] The invention belongs to the field of polymer material preparation, in particular to a preparation method of polyolefin / nanometer calcium carbonate mixture. Background technique [0002] Transformation of traditional polymer materials with nanotechnology and materials is a hot research topic at home and abroad. Nano-calcium carbonate is currently the nanomaterial with the largest output and the lowest price. At present, improving the dispersion of nano-calcium carbonate and strengthening the interfacial bonding is mainly to use a high-speed mixer to dry-mix resin, nano-calcium carbonate and various modified additives, only for one kind of mixing, and then use this mixture with Twin-screw melt extrusion, cooled by a large amount of cooling water to form strips, granulated by a granulator, and then dried after granulation, for subsequent processing, such as Chinese patent application numbers: 03126909.5 and 200610034690.8. However, there are obvious di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/20C08L23/00C08K13/02C08K3/26
Inventor 王依民宣大胜曹玲玲倪建华袁静刘书佳
Owner DONGHUA UNIV
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