Patent · US Active

Encapsulated particle

US9388089B2 · kind B2 · utility

0Cited by

27References

17Claims

0Family size

Assignee

BASF SE

Inventors

Raymond A. Neff · Bloomfield Hills, US
Alexander Gershanovich · Beverly Hills, US
Donald C. Mente · Grosse Ile Township, US

Key dates

Filing date	May 20, 2013
Grant date	Jul 12, 2016
Priority date	—
Expiry date	May 20, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2998
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

An encapsulated particle includes a core particle and a polyurethane layer. The polyurethane layer is disposed about the core particle and includes the reaction product of an isocyanate and a polyol component. The polyurethane layer is formed in the presence of a silicone surfactant. The polyol component includes a first polyol having a nominal functionality of at least 2.5 and a hydroxyl number of from 20 to 300 mg KOH/g. A method of encapsulating the core particle includes the steps of providing the core particle, the silicone surfactant, the isocyanate, and the polyol component. The method also includes the steps of mixing the isocyanate and the polyol component and encapsulating the core particle with the polyurethane layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.