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Pearlylustre resin production method

A resin and pearlescent technology, which is applied in the field of pearlescent resin preparation, can solve the problems of no pearly luster on the outer surface of the product, troublesome preparation process, yellowing of the product, etc., and achieve the effect of obvious pearlescent effect, low cost and simple production method

Inactive Publication Date: 2006-11-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In CN1261388A, a solution is proposed to add pearlescent pigments to easily make the product turn yellow, and a layer of outer coating is fired on the mica particles to prevent the product from turning yellow, but the preparation process is cumbersome
However, the limitations of this patent are relatively large. For example, the mixture structure can only be PS as the dispersed phase and PP as the continuous phase, and the particle size of the dispersed phase must be within a certain range, otherwise the outer surface of the product will have no pearly luster, which undoubtedly affects the processing technology. made higher demands

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 60wt% of acrylonitrile-butadiene-styrene terpolymer (ABS) and 40wt% of general-purpose polystyrene (GPPS) were uniformly mixed, melt-blended and extruded by a twin-screw extruder. The refractive indices of ABS and GPPS are 1.41 and 1.59, and the melt indices are 4.5 and 8.0g / 10min, respectively. The screw speed is 150rpm, the temperature of each heating section of the barrel from the feeding port to the die is 180°C, 210°C, 225°C, 225°C, 225°C, 225°C, 220°C, 220°C, and the residence time of the material in the barrel The time is about 2.0 minutes, and the pellets obtained by extrusion granulation are dried in a vacuum oven at 100° C. for 12 hours to obtain granular pearlescent resin.

Embodiment 2

[0026] 40wt% of polypropylene (PP) and 30wt% of polyethylene (PE) were uniformly mixed with 30wt% of polycarbonate (PC), melt-blended and extruded with a twin-screw extruder. The refractive indices of the former two blends and PC are 1.49 and 1.59, and the melt indices are 6.0 and 3.2g / 10min, respectively. The screw speed is 300rpm, the temperature of each heating section of the barrel from the feeding port to the die is 220°C, 230°C, 235°C, 235°C, 235°C, 235°C, 230°C and 225°C, and the residence time of the material in the barrel The time is about 1.5 minutes, and the pellets obtained by extrusion granulation are dried in a vacuum oven at 80° C. for 24 hours to obtain granular pearlescent resin.

Embodiment 3

[0028] 90 wt% polyethylene (PE) and 10 wt% styrene-butadiene block copolymer (SBC) were uniformly mixed, melt-blended and extruded by a twin-screw extruder. The refractive indices of PE and SBC are 1.49 and 1.62, and the melt indices are 5.5 and 8.0g / 10min, respectively. The screw speed is 300rpm, the temperature of each heating section of the barrel from the feed port to the die is 120°C, 140°C, 150°C, 150°C, 150°C, 150°C, 140°C and 135°C, and the residence time of the material in the barrel The time is about 1.5 minutes, and the pellets obtained by extrusion granulation are dried in a vacuum oven at 60° C. for 12 hours to obtain granular pearlescent resin.

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Abstract

The invention discloses a method for preparing pearlite reisn, which melts two resins while the difference between their refractive indexes is between 0.01-0.30 and the difference between melt indexes is between 2.0-8.0g / 10min in the extruder to prepare the particles. Wherein, the temperature of extruder is 120-280Deg. C and the rotational speed is 100-400rpm; the extruded pearlite resin can be directly used to produce pearlite plastic product. Compared to traditional method that adds pearlite paint to prepare pearlite resin, the invention has significant pearlite effect, simple method, lower cost, stable property, non-toxic, and wider application.

Description

Technical field: [0001] The invention relates to a preparation method of thermoplastic resin, in particular to a preparation method of pearlescent resin. Background technique: [0002] In recent decades, the application of the plastics industry in the world has developed very rapidly. It also occupies an important position in my country's national economy. With the improvement and development of plastic molding and processing methods, plastic products are becoming more and more colorful. New varieties of high-performance and functional plastics have been successfully developed and industrialized one after another, and new processes and new equipment have been continuously developed and applied, all of which have played a role in promoting the development of the plastics industry. At present, people not only put forward higher requirements for the performance of plastic products, but also have higher requirements for their appearance quality and effect. Some technologies th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/00B29B9/12B29C48/92B29K23/00B29K25/00B29K33/04B29K55/02B29K69/00B29K77/00
CPCB29C48/92B29C2948/9259B29C2948/92695B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 田敬华周持兴杨斌刘青
Owner SHANGHAI JIAO TONG UNIV
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