Method for producing heat-expandable microspheres and application thereof
US8206826B2 · kind B2 · utility
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4References
22Claims
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Key dates
| Filing date | May 14, 2008 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | May 14, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2989
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A production method for heat-expandable microspheres, which have high expanding ratio and are thermally expanded into hollow particulates having excellent repeated-compression durability, and application thereof are provided. The method produces heat-expandable microspheres a shell of thermoplastic resin and a blowing agent being encapsulated therein and having a boiling point not higher than the softening point of the thermoplastic resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.