A kind of gutta-percha containing boron nitride and preparation method thereof

A boron nitride and gutta-percha technology, which is used in dental preparations, dentistry, pharmaceutical formulations, etc., can solve the problems that the flow performance is difficult to become a filling effect gutta-percha material, and the fluidity of the material is affected.

Active Publication Date: 2022-08-09
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while the thermal conductivity is improved, the large amount of inorganic fillers seriously affects the fluidity of the material.
At this time, even if the thermal conductivity is excellent, the limitation of flow performance makes it difficult to become a gutta-percha material with good filling effect

Method used

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  • A kind of gutta-percha containing boron nitride and preparation method thereof
  • A kind of gutta-percha containing boron nitride and preparation method thereof
  • A kind of gutta-percha containing boron nitride and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The temperature of the hot roller was set at 65°C, 100 parts by mass of eucommia gum, 250 parts by mass of zinc oxide, and 1 part by mass of boron nitride (the thickness of boron nitride is about 65 nm, and the surface size is 200 nm-1 μm.). Put the uniformly kneaded sample into a 25t flat-plate vulcanizer for tablet pressing, and after cutting, put it into a high-temperature stretching oven for stretching orientation. The test temperature is 70 degrees Celsius, the stretching rate is 500 mm / min, and the thermal conductivity in the thermal conductivity direction is tested. . In addition, the mixed material was tested with a melt index meter for flow properties. The specific operation steps were as follows: cut the sample into small pieces and place them in the melt index meter for 300S and then extrude. The extrusion temperature was 120°C and the pressure was 2Kg. The composite material of 100 parts by mass of eucommia gum and 250 parts by mass of zinc oxide was set as ...

Embodiment 2

[0039] The temperature of the hot roller was set at 65° C., 100 parts by mass of eucommia glue, 400 parts by mass of zinc oxide, and 5 parts by mass of boron nitride (the thickness of boron nitride is about 65 nm, and the surface size is 200 nm-1 μm). The thermal conductivity of the composite material in the orientation direction is tested. First, the composite material is placed in a 25t flat vulcanizer for pressing and cutting, and then placed in a high-temperature stretching oven for stretching orientation. The test temperature is 70 degrees Celsius and the stretching rate is 500 mm / min. And test the thermal conductivity in the direction of heat conduction. The composites were tested for flow in a melt indexer. Extruded after being kept for 300S in a melt index meter, and the extrusion temperature was 120°C. The composite material of 100 parts by mass of eucommia gum and 400 parts by mass of zinc oxide was set as the matrix composite material, and its MFR (g / 10min) was set...

Embodiment 3

[0041] The temperature of the hot roller was set at 65° C., 100 parts by mass of eucommia glue, 400 parts by mass of zinc oxide, and 10 parts by mass of boron nitride (the thickness of boron nitride is about 65 nm, and the surface size is 200 nm-1 μm). The thermal conductivity measurement process of the composite material after orientation is firstly to put the composite material in a 25t flat vulcanizer for pressing and cutting, and then put it into a high-temperature stretching oven for stretching orientation. The test temperature is 70 degrees Celsius and the stretching rate is 500 mm. / min and test the thermal conductivity in the direction of heat conduction. The fluidity of the composite material was tested in a capillary rheometer, and then extruded after being held in a capillary rheometer for 300 s. The extrusion temperature was 120 °C and the shear rate was set at 300 s. -1. The composite material of 100 parts by mass of eucommia gum and 400 parts by mass of zinc oxi...

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Abstract

The invention discloses a boron nitride-containing gutta-percha and a preparation method. The gutta-percha is prepared by kneading or kneading and stretching raw materials comprising the following components: Total: 100 parts by weight of eucommia gum; 250-500 parts by weight of zinc oxide; 1-10 parts by weight of boron nitride. The preparation method comprises the following steps: mixing the components according to the stated amounts, or kneading and stretching to prepare the boron nitride-containing gutta-percha. The present invention improves the fluidity of the gutta-percha, and also improves the thermal conductivity of the gutta-percha, facilitates filling by clinical staff, relieves pain of patients and shortens treatment time.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and more particularly, to a boron nitride-containing gutta-percha and a preparation method. Background technique [0002] Root canal therapy is an effective means of treating pulp diseases and periapical diseases, and gutta-percha tips are the most widely used dental filling materials in root canal therapy. However, due to the complex anatomical structures of the root canal system, such as many collateral root canals, it is difficult for root canal filling materials to enter such irregular structures. , so we need a gutta-percha tip with better fluidity and higher thermal conductivity. [0003] At present, the main components of commercial gutta-percha are gutta-percha, zinc oxide, barium sulfate, etc., and the mass fraction of electrodeless fillers such as zinc oxide can usually be as high as 70%-80%, of which a small amount of barium sulfate plays a role in developing, and a large am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/887A61K6/831A61K6/70A61K6/56A61K6/15
Inventor 刘力曲秀波张继川董梦杰王晓燕袁重阳于洋
Owner BEIJING UNIV OF CHEM TECH
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