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Barium sulfate master batch for plastic pipe and preparation method

A technology of plastic pipes and barium sulfate, applied in the field of plastic processing, can solve the problems of poor ring pressure resistance and brittle pipes, and achieve the effects of preventing brittleness, increasing bending strength and reducing environmental pollution.

Inactive Publication Date: 2021-04-16
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the current problem that barium sulfate is used for plastic pipes with high filling content, the pipes are brittle and the ring pressure resistance is poor, the present invention proposes a barium sulfate masterbatch for plastic pipes and its preparation method

Method used

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  • Barium sulfate master batch for plastic pipe and preparation method

Examples

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Effect test

Embodiment 1

[0027]Grind the precipitated barium sulfate with a D80 particle size of 2 μm and sulfur at a mass ratio of 100:0.2 at 115°C with a ball mill without grinding media, the grinding speed is 80rpm, and the grinding time is 15min, so that the sulfur is evenly distributed on the surface of the barium sulfate, and the pretreatment is obtained. Barium sulfate. Mix SBS, paraffin, DCP, and pretreated barium sulfate at a mass ratio of 5:2:0.01:60, feed them into a screw extruder, and extrude at 120°C. SBS melts into a low-viscosity material under the action of hot melt and paraffin. The pretreatment barium sulfate surface is fully contacted and vulcanized, and the obtained extruded pellets are ground and refined by a vortex airflow refiner to obtain sulfurized SBS-coated barium sulfate fine powder. The vortex airflow refiner host speed is 1000rpm, and the classification Speed ​​800rpm. The vulcanized SBS-coated barium sulfate fine powder is used as filler, mixed with PP k8303 polypropyl...

Embodiment 2

[0029] Grind the precipitated barium sulfate with a D80 particle size of 2 μm and sulfur at a mass ratio of 100:0.2 at 115°C with a ball mill without grinding media, the grinding speed is 80rpm, and the grinding time is 17min, so that the sulfur is evenly distributed on the surface of the barium sulfate, and the pretreatment is obtained. Barium sulfate. Mix SBS, paraffin, DCP, and pretreated barium sulfate at a mass ratio of 5:2.5:0.01:60, feed them into a screw extruder, and extrude at 120°C. SBS is melted into a low-viscosity material under the action of hot melt and paraffin. The pretreatment barium sulfate surface is fully contacted and vulcanized, and the obtained extruded pellets are ground and refined by a vortex airflow refiner to obtain sulfurized SBS-coated barium sulfate fine powder. The vortex airflow refiner host speed is 1000rpm, and the classification Speed ​​900rpm. The vulcanized SBS-coated barium sulfate fine powder is used as a filler, mixed with PP k8303 p...

Embodiment 3

[0031] Grind the precipitated barium sulfate with a D80 particle size of 3 μm and sulfur at a mass ratio of 100:0.3 at 115°C with a ball mill without grinding media, the grinding speed is 80rpm, and the grinding time is 18min, so that the sulfur is evenly distributed on the surface of the barium sulfate, and the pretreatment is obtained. Barium sulfate. Mix SBS, paraffin, DCP, and pretreated barium sulfate at a mass ratio of 6:2.5:0.02:70, feed them into a screw extruder, and extrude at 125°C. SBS is melted into a low-viscosity material under the action of hot melt and paraffin. The pretreatment barium sulfate surface is fully contacted and vulcanized, and the extruded pellets obtained are ground and refined by a vortex airflow refiner to obtain sulfurized SBS-coated barium sulfate fine powder. The main engine speed of the vortex airflow refiner is 1100rpm and classified Speed ​​900rpm. The vulcanized SBS-coated barium sulfate fine powder is used as filler, mixed with PP k830...

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Abstract

The invention relates to the technical field of plastic processing, and discloses a barium sulfate master batch for a plastic pipe and a preparation method thereof. The preparation method includes the steps that sulfur is dispersed on the surface of barium sulfate, SBS is further dispersed on the surface of barium sulfate in a hot melting mode under the assistance of paraffin, SBS is vulcanized at the proper temperature, the surface of smashed barium sulfate fine powder is firmly coated with vulcanized SBS, and then the powder is mixed with polypropylene carrier resin and granulated to obtain the master batch. According to the process and the product provided by the invention, on one hand, the barium sulfate powder can be well dispersed in the polymer base material and the compatibility with the polymer base material is improved, and on the other hand, the vulcanized SBS-coated barium sulfate fine powder is similar to elastic particles to form a core-shell toughening structure; the flexibility of the pipe is improved while the rigidity such as the bending strength of the pipe is improved, in addition, the oil absorption value of the powder can be reduced, the processability of the powder is improved, a large number of small molecular auxiliaries are not needed in the further forming machining process, and cost reduction and environmental pollution reduction are facilitated.

Description

Technical field [0001] The invention relates to the technical field of plastic processing, and in particular to a barium sulfate masterbatch for plastic pipes and a preparation method. Background technique [0002] Inorganic powder used in plastics can not only reduce costs, but also give plastics special functions. For example, reinforced plastics usually need to add glass fiber to achieve the purpose of reinforcement. In addition, as inorganic powder is added to plastics, the thermal stability, rigidity, wear resistance, etc. of plastic products will be improved, greatly expanding the use areas of plastic products. Especially in engineering plastics, inorganic powder has become an indispensable filler to increase the functionality of plastics. [0003] Barium sulfate is widely used in the plastics field. If about 25% of barium sulfate is applied to polypropylene, the rigidity and gloss will be improved, and a high-hardness plastic similar to ABS can be obtained. Barium...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K9/10C08K3/30C08J3/22
Inventor 曾军堂陈庆司文彬白涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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