Glass bubbles, composites therefrom, and method of making glass bubbles
US9006302B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2011 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Sep 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2996
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure provides a plurality of glass bubbles having an average true density of up to about 0.55 grams per cubic centimeter and a size distribution including a median size in a range from about 15 micrometers to 40 micrometers. A hydrostatic pressure at which ten percent by volume of the plurality of glass bubbles collapses is at least about 100 megapascals. In some embodiments, the plurality of glass bubbles is a graded fraction preparable by classifying a second plurality of glass bubbles, wherein the second plurality of glass bubbles has a higher percentage of glass bubbles with a size of up to ten micrometers than the first plurality of glass bubbles. Composites including the plurality of glass bubbles are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.