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Low density glass particles with low boron content

A glass particle and glass micro technology, applied in the directions of transportation, packaging, thin material handling, etc., can solve the problems of chemical-free durability and fragility, and achieve the effect of reducing glass waste and reducing costs.

Inactive Publication Date: 2015-04-15
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, products made from these processes and materials are cellular, fragile, non-chemically durable, and / or have other limiting characteristics

Method used

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  • Low density glass particles with low boron content
  • Low density glass particles with low boron content
  • Low density glass particles with low boron content

Examples

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example

[0081] All parts, percentages, ratios, etc. in the examples and in the remainder of this specification are by weight unless otherwise indicated. Starting materials were purchased from Sigma Aldrich, St. Louis, Missouri unless otherwise noted.

[0082] The recyclable glass used in the examples was a tri-color recyclable container glass (80 mesh) available from Strategic Materials Inc (Strategic Materials Inc, Houston, Texas) in white (flint), amber and emerald green (green) recyclable glass blend composition.

[0083] testing method

[0084] Average particle density determination

[0085] According to ASTM D2840-69, "Average True Particle Density of Hollow Microspheres", using fully automated gas displacement obtained from Micromeritics, Norcross, Georgia Pycnometer ACCUPYC 1330 PYCNOMETER, to determine the density of microspheres.

[0086] particle size determination

[0087] Particle size distribution was determined using a BECKMAN COULTER LS 13 320 Particle Size A...

example 1-4 and comparative example A-D

[0095] Material :

[0096] Tricolor recyclable container glass (80 mesh) is commercially available from Strategic Materials Inc., Texas. On an equivalent basis, according to the chemical analysis method of hollow microspheres (above), the analysis result of the glass is, 2.07 weight percent Al 2 o 3 , 0.04% by weight of B 2 o 3 , 12.18% by weight of CaO, 13.49% by weight of Na 2 O, 0.02% P 2 o 5 , 0.27 weight percent SO 3 , 69.54 weight percent Si0 2 and 0.01 weight percent ZnO.

[0097] Boronic Acid: Commercially available from EMD Chemicals, Gibbstown, New Jersey.

[0098] Sugar: Available from Domino Food Inc., Yonkers, New York.

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Abstract

Glass particles comprise glass microbubbles. The glass particles have a size distribution with a d50 in the range of from 15 to 100 microns, and have a true density of less than 0.7 g / cm3. The glass particles comprise, on an equivalent weight basis: from 50 to 70 weight percent silica; from 2 to 7 weight percent of boria; from 0.5 to 4 weight percent of weight zinc oxide; from 8 to 17 weight percent of calcia; from 0.8 to 7 weight percent of phosphorus pentoxide; and from 2 to 9 weight percent of sodium oxide.

Description

technical field [0001] The present disclosure broadly relates to hollow glass microbubbles, and methods of making and using the same. Background technique [0002] Glass microbubbles, also known in the art as "hollow glass microspheres" or "glass microspheres," typically have low specific gravity, suitable heat resistance, thermal insulation, compression resistance (e.g., crush strength), and impact resistance, and achieves excellent physical properties when replacing conventional fillers. [0003] Accordingly, glass microbubbles are used in applications such as molded parts (including, for example, molding compounds for household appliances, portable electronic devices, and automobiles), putties, sealing materials, buoyancy materials for ships, composite wood, reinforced cementitious exterior walls materials, lightweight exterior wall materials and artificial marble. In addition, due to the structure of the hollow particles, the glass microbubbles can have a low dielectri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C1/00C03C3/097C03C11/00
CPCC03C1/002C03C3/097C03C11/002C01P2004/51C01P2004/61C01P2006/10C03C3/083C03C3/089Y10T428/2982C03C12/00
Inventor 戚钢
Owner 3M INNOVATIVE PROPERTIES CO
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