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Processing aid for thermoplastic polymer and melt-processable composition containing same

A technology for thermoplastic polymers and processing aids, applied in the field of processing aids for thermoplastic polymers and melt-processable compositions, can solve the problems of performance degradation and cost reduction of processing aids, achieve cost reduction and improve use effects Effect

Active Publication Date: 2022-04-22
GUANGZHOU SHINE POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that many of these patents are about replacing 50-80% of fluoropolymers with synergists such as polyethylene glycol or polycaprolactone, although the addition of polyethylene glycol or polyester synergists can greatly reduce Fluoropolymer content leads to cost reduction, but its addition also reduces the performance of processing aids

Method used

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  • Processing aid for thermoplastic polymer and melt-processable composition containing same
  • Processing aid for thermoplastic polymer and melt-processable composition containing same
  • Processing aid for thermoplastic polymer and melt-processable composition containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation and use of processing aid for embodiment 1PPA-1 thermoplastic polymer

[0048] (1) In a container with stirring and mixing, add 56.5 parts (weight) of ethyl acrylate, 33.5 parts (weight) of butyl acrylate, 10 parts (weight) of acrylic acid and 0.01 part (weight) of positive Dodecanethiol, stirred evenly to obtain a monomer mixture;

[0049] Then in the reactor with heating and stirring device, add the water of 400 parts (weight), the sodium stearate of 0.6 part (weight) and the potassium persulfate of 0.04 part (weight), after stirring and being heated to 65 ℃, in Add the above-obtained monomer mixture into the reactor uniformly and continuously within 2-3 hours, keep the temperature for 0.5 hours and then lower the temperature to 30° C. to obtain a polyacrylate emulsion. Sampling detects that the particle diameter of the latex is 127nm, and the solid content is 20%. The weight-average molecular weight of the polyacrylate is 1.34 million as measured by the ...

Embodiment 2

[0053] Preparation and use of processing aid for embodiment 2PPA-2 thermoplastic polymer

[0054] (1) In a container with stirring and mixing, add 56.5 parts (weight) of ethyl acrylate, 33.5 parts (weight) of butyl acrylate, 10 parts (weight) of acrylic acid and 0.07 parts (weight) of positive Dodecanethiol, stirred evenly to obtain a monomer mixture.

[0055] Then in the reactor with heating and stirring device, add the water of 400 parts (weight), the sodium stearate of 0.6 part (weight) and the potassium persulfate of 0.05 part (weight), after stirring and being heated to 65 ℃, in Add the monomer mixture obtained above to the reactor uniformly and continuously within 2-3 hours, keep the temperature for 0.5 hours and then lower the temperature to 30° C. to obtain a polyacrylate emulsion. The particle size of the latex was 102nm and the solid content was 20% as detected by sampling. The weight average molecular weight of the polyacrylate measured by GPC was 560,000.

[0056...

Embodiment 3

[0059] Preparation and use of processing aid for embodiment 3PPA-3 thermoplastic polymer

[0060] Get 30 parts of (weight) the PPA-1 that obtains in the embodiment 1 and join in the disperser, then add 70 parts of (weight) molecular weight again and be the Polyethylene Glycol of 10000, obtain fluorine-containing polymer content 10% after mixing, A processing aid for thermoplastic polymers containing 20% ​​polyalkyl acrylate elastomer and 70% polyethylene glycol is denoted as PPA-3.

[0061] Preparation of melt processable composition: 3 parts (weight) of PPA-3 and 97 parts (weight) of thermoplastic polyolefin resin LLDPE are first mixed uniformly, then continuously fed into twin-screw extruder, under the condition of 190 ° C , extruded strands, cooled and solidified in a water bath, pelletized and dried to obtain a processing aid masterbatch with a PPA-3 content of 3%, denoted as MB-3.

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Abstract

The invention provides a processing aid for a thermoplastic polymer and a melt-processable composition containing the processing aid. The processing aid is prepared from the following components in percentage by weight: 10 to 70 percent of polyacrylic acid alkane ester and the balance of fluorine-containing polymer; wherein the weight-average molecular weight of the polyacrylic acid alkane ester is greater than 150,000. According to the processing aid for the thermoplastic polymer, the polyacrylic acid alkane ester is added to serve as a synergist, the content of fluorine-containing polymers can be reduced by adding the synergist, and the using effect of the processing aid is kept and even improved; in addition, the price of the polyacrylic acid alkane ester is only 20-30% of the price of the fluorine-containing polymer, so that the cost of the processing aid can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of modification aids for thermoplastic polymer processing, and in particular relates to a processing aid for thermoplastic polymers and a melt-processable composition containing the processing aid. Background technique [0002] A common processing method for polymer materials is to feed thermoplastic polymers into a screw extruder, pass through different types of dies, and finally cool down into a product with the shape of the die. For example, this method is used to extrude the polyolefin polymer melt through a screw extruder to be processed into pipes, cable coatings or films and the like. [0003] In order to improve production efficiency and reduce production costs, the method of increasing the screw speed of the extruder to increase the extrusion speed is usually adopted, but the faster the extrusion speed, the higher the shear rate of the polymer melt. For any melt processable thermoplastic polymer co...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08L33/08C08L23/08
CPCC08L27/16C08L23/0815C08L33/064
Inventor 潘杰辉冯沛劲
Owner GUANGZHOU SHINE POLYMER TECH
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