Core-shell impact modifiers for transparent polymer matrices
US8466214B2 · kind B2 · utility
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Key dates
| Filing date | Aug 4, 2009 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Aug 4, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Processes for making a core and core-shell copolymers are provided herein. Processes for making crosslinked elastomeric core particles includes emulsion polymerizing, in the presence of a radical polymerization initiator, a polymerization mixture containing at least one ethylenic elastomeric monomer, at least one crosslinking agent, and at least one sulfur-containing additive of the formula I below, where R and Z are defined herein.The core-shell copolymers formed are useful for example as additives in polymer matrices such as for modifying impact strength and improving optical properties.
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