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Nontoxic colored transparent polypropylene and preparing method thereof

A technology of transparent polypropylene and polypropylene, which is applied in the field of non-toxic colored transparent polypropylene and its preparation, can solve the problems of reducing the durability of transparent polypropylene products, restricting the application of transparent polypropylene materials, and high cost, and achieves the improvement of mechanical properties, Excellent transparency and mechanical properties, easy to operate

Inactive Publication Date: 2008-03-26
贵州凯科特材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing colored transparent polypropylene products are usually prepared by adding organic pigments, but the organic pigments are easy to precipitate from the polypropylene matrix, which not only reduces the coloring durability of transparent polypropylene products, but also limits the application of transparent polypropylene materials in medical appliances. And food packaging and other materials applications
The patent application number is that the patent application of CN01805579.6 discloses a kind of polyolefin wax prepared by metallocene in the application of strengthening the dispersibility of organic pigment in polypropylene, but in this patent method still will make by adding organic pigment It is colored, and the cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: preferred embodiment of the present invention

[0027] Raw materials: 1000 g of polypropylene, 2.5 g of non-toxic colored silica sol with a mass percent concentration of silicon dioxide of 40%, and 0.1 g of antioxidant 1010 (commercially available, industrial grade).

[0028] Preparation method: put polypropylene, non-toxic colored silica sol and antioxidant into mixing equipment and mix evenly, then extrude polypropylene pellets in twin-screw extruder according to the method of polymer processing and molding, and control twin-screw extrusion Exit screw temperature: Zone I 170°C, Zone II 175°C, Zone III 180°C, Zone IV 185°C, Zone V 190°C, Zone VI 195°C, Zone VII 200°C, Zone VIII 205°C, head temperature 205°C, the screw speed is 200 rpm. The prepared polypropylene pellets were left open in the air for 48 hours, and then put into an oven and dried at 75°C for 2 hours to keep the water content below 0.01% to obtain non-toxic colored polypropylene.

Embodiment 2

[0029] Embodiment 2: the preparation method of the nontoxic colored silica sol used in the present invention

[0030] Add 0.25 kg of elemental silicon powder with a particle size of 200 mesh and 20 grams of catalyst in 3.5 kg of deionized water, heat to 90 ° C, stir at a constant speed of 100 rpm, add 5 ml of ammonia water every two hours, and stop adding ammonia water after four hours , that is, a colorless silica sol is obtained. Adjust the pH of the colorless silica sol to 2-4 with a 5% hydrochloric acid solution, and then add FeCl with a mass percentage concentration of 10%. 3 0.2 kg of aqueous solution, continue to heat and stir for 8 hours, filter, stir and concentrate at 150°C until the solution concentration is 15-20%, that is, a non-toxic colored silica sol is obtained.

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Abstract

The present invention provides process of preparing non-toxic color transparent polypropylene material. The non-toxic color transparent polypropylene material is prepared with non-toxic color silica gel as the transparent nucleating agent and colorant, polypropylene and antioxidant, and through mixing, extruding and pelletizing in a double screw extruder, and drying. The preparation process has low production cost and simple operation, and the prepared non-toxic color transparent polypropylene material has bright color, high transparency, high mechanical performance and high marketability.

Description

technical field [0001] The invention relates to a polypropylene and a preparation method thereof, in particular to a nontoxic colored transparent polypropylene and a preparation method thereof. Background technique [0002] Polypropylene is a kind of thermoplastic resin prepared by polymerization of propylene, usually a translucent colorless solid, odorless and non-toxic, and is the lightest general-purpose plastic. Its corrosion resistance, strength, rigidity and transparency are better than polyethylene. The disadvantage is that it has poor low temperature impact resistance and is easy to age, but it can be overcome by modification and addition of antioxidants. With the continuous improvement of people's living standards, it will inevitably bring different requirements and improvements in various aspects such as culture, entertainment, food, medical care, materials, and room decoration. Many items in the market are increasingly using transparent materials. Organic nucleat...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K3/34B29C47/40B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/40B29C48/9185B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 于杰鲁圣军蒋冠森何敏罗筑王彩红都佩华
Owner 贵州凯科特材料有限公司